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  • 1.
    Andersson, Anders
    et al.
    Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), Institutionen för miljö- och livsvetenskaper (from 2013).
    Bergman, Eva
    Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), Institutionen för miljö- och livsvetenskaper (from 2013).
    Greenberg, Larry
    Karlstads universitet, Fakulteten för samhälls- och livsvetenskaper, Avdelningen för biologi.
    Piccolo, John
    Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), Institutionen för miljö- och livsvetenskaper (from 2013).
    Comparing mail-in, interview and tournament catch rates for a recreational salmonid fisheryManuskript (preprint) (Annet vitenskapelig)
  • 2.
    Andersson, Anders
    et al.
    Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), Institutionen för miljö- och livsvetenskaper (from 2013).
    Greenberg, Larry
    Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), Institutionen för miljö- och livsvetenskaper (from 2013).
    Bergman, Eva
    Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), Institutionen för miljö- och livsvetenskaper (from 2013).
    Su, Zhenming
    Andersson, Magnus
    Piccolo, John
    Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), Institutionen för miljö- och livsvetenskaper (from 2013).
    Estimating effort and catch of a recreational trolling fishery in one of Europe’s largest lakesManuskript (preprint) (Annet vitenskapelig)
  • 3. Armstrong, Janet L.
    et al.
    Myers, Katherine W.
    Beauchamp, David A.
    Davis, Nancy D.
    Walker, Robert V.
    Boldt, Jennifer L.
    Piccolo, John
    Karlstads universitet, Fakulteten för samhälls- och livsvetenskaper, Avdelningen för biologi.
    Haldorson, Lewis J.
    Moss, Jamal H.
    Interannual and Spatial Feeding Patterns of Hatchery and Wild Juvenile Pink Salmon in the Gulf of Alaska in Years of Low and High Survival2008Inngår i: Transactions of the American Fisheries Society 2008; 137: 1299-1316Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    To improve understanding of the mechanisms affecting growth and survival, we evaluated the summer diets and feeding patterns (prey composition, energy density, and stomach fullness) of hatchery and wild juvenile pink salmon Oncorhynchus gorbuscha in Prince William Sound (PWS) and the northern coastal Gulf of Alaska (CGOA). Our study (19992004) included 2 years of low (3%), mid (5%), and high (89%) survival of PWS hatchery pink salmon. Because variations in diet should affect growth and ultimately survival, we expected that the variations in diet, growth, and survival would be correlated. During August in the CGOA, pteropod-dominated diets and higher gut fullness corresponded to high survival (59%), and copepod-dominated diets and lower gut fullness corresponded to low survival (3%). Within years, no significant differences were found in diet composition or gut fullness between hatchery and wild fish or among the four PWS hatchery stocks. Diets varied by water mass (habitat) as juveniles moved from PWS to more saline habitats in the CGOA. In July, when juveniles were most abundant in PWS, their diets were dominated by pteropods and hyperiid amphipods. The diets of fish that moved to inner-shelf (i.e., the least-saline) habitat in the CGOA in July were dominated by larvaceans in low-survival years and pteropods in high-survival years. Diet quality was higher in CGOA habitats than in PWS in July. In August, fish moved to the more productive, more saline water masses in the CGOA, where large copepods and pteropods were dominant prey and diet quality was better than in PWS. Our results indicate that spatial variation in the diets of juvenile pink salmon in July and the timing of migration to the CGOA play a critical role in marine growth and survival

  • 4.
    Bergman, Eva
    et al.
    Karlstads universitet, Fakulteten för samhälls- och livsvetenskaper, Avdelningen för biologi.
    Calles, Olle
    Karlstads universitet, Fakulteten för samhälls- och livsvetenskaper, Avdelningen för biologi.
    Greenberg, Larry
    Karlstads universitet, Fakulteten för samhälls- och livsvetenskaper, Avdelningen för biologi.
    Lans, L
    Norrgård, Johnny
    Karlstads universitet, Fakulteten för samhälls- och livsvetenskaper, Avdelningen för biologi.
    Olsson, I
    Piccolo, John J
    Karlstads universitet, Fakulteten för samhälls- och livsvetenskaper, Avdelningen för biologi.
    Schmitz, M
    Vandrande fisk i Klarälven2008Konferansepaper (Fagfellevurdert)
  • 5.
    Bergman, Eva
    et al.
    Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), Institutionen för miljö- och livsvetenskaper.
    Greenberg, Larry
    Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), Institutionen för miljö- och livsvetenskaper.
    Norrgård, Johnny
    Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), Institutionen för miljö- och livsvetenskaper.
    Piccolo, John
    Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), Institutionen för miljö- och livsvetenskaper.
    Schmitz, Monika
    Evolutionsbiologiskt centrum, Uppsala universitet.
    Lax och öring i Klarälven - möjligheter för vild fisk och kvalité på odlad fisk: Slutrapport 2008-20122013Rapport (Annet vitenskapelig)
    Abstract [sv]

    Data från 1800-talet visar att fångsterna av lax och öring i både älv och sjö varit mycket högre än idag. Storskaliga dämmen, kraftigt fiske i Dejeforsen, nio kraftverk i den svenska delen av Klarälvens huvudfåra, och användandet av älven för timmerflottning har bidragit till detta. Efter att utsättning av kompensationsodlad fisk startade ökade fångsten igen, även om den fortfarande är låg.

    Fältundersökningar av vild laxsmolt visade att 16 % av smolten klarade sig hela vägen förbi de åtta kraftverken mellan Edebäck och Forshaga. Under studien var vattenföringen, och därmed spillet, lågt, vilket troligen bidragit till de höga förlusterna. Normalt spills det inte under hela smoltvandringsperioden, vilket är olyckligt.

    Lax och öring uppfödda under normala odlingsförhållanden är oftast större och fetare än vild fisk. Vi födde upp lax med olika fodertyper och fodermängder. Mängden föda påverkade laxens tillväxt och smoltmognad, och lax som fått fettfattigt foder var mest ”naturlik”. Den klarade också vandringen bäst, 80 % tog sig till Vänern medan 55 % av laxen som fått normalt eller lite foder. Bara 20 % av tidigt könsmogna hanar tog sig till Vänern.

    Rapporten avslutas med implikationer och förslag till åtgärder och fortsatta studier.

  • 6.
    Bergman, Eva
    et al.
    Karlstads universitet, Fakulteten för samhälls- och livsvetenskaper, Avdelningen för biologi.
    Greenberg, Larry
    Karlstads universitet, Fakulteten för samhälls- och livsvetenskaper, Avdelningen för biologi.
    Norrgård, Johnny R
    Karlstads universitet, Fakulteten för samhälls- och livsvetenskaper, Avdelningen för biologi.
    Piccolo, John J
    Karlstads universitet, Fakulteten för samhälls- och livsvetenskaper, Avdelningen för biologi.
    Schmitz, Monika
    Uppsala universitet.
    Lax och öring i Klarälven - möjligheter för vild fisk och kvalité på utsatt fisk: Rapport av aktiviteter och uppnådda resultat under 2009-20102010Rapport (Annet vitenskapelig)
  • 7.
    Bergman, Eva
    et al.
    Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), Institutionen för miljö- och livsvetenskaper.
    Greenberg, Larry
    Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), Institutionen för miljö- och livsvetenskaper.
    Norrgård, Johnny R
    Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), Institutionen för miljö- och livsvetenskaper.
    Piccolo, John J
    Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), Institutionen för miljö- och livsvetenskaper.
    Schmitz, Monika
    Lax och öring i Klarälven - möjligheter för vild fisk och kvalité på utsatt fisk: Rapport av aktiviteter och uppnådda resultat under 2010-20112011Rapport (Annet vitenskapelig)
  • 8.
    Bergman, Eva
    et al.
    Karlstads universitet, Fakulteten för samhälls- och livsvetenskaper, Avdelningen för biologi.
    Greenberg, Larry
    Karlstads universitet, Fakulteten för samhälls- och livsvetenskaper, Avdelningen för biologi.
    Piccolo, John
    Karlstads universitet, Fakulteten för samhälls- och livsvetenskaper, Avdelningen för biologi.
    Norrgård, Johnny
    Karlstads universitet, Fakulteten för samhälls- och livsvetenskaper, Avdelningen för biologi.
    Schmitz, Monika
    Karlstads universitet, Fakulteten för samhälls- och livsvetenskaper, Avdelningen för biologi.
    Lax och öring i Klarälven: möjligheter för vild fisk och kvalité på utsatt fisk2009Rapport (Annet vitenskapelig)
  • 9.
    Bergman, Eva
    et al.
    Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), Institutionen för miljö- och livsvetenskaper.
    Norrgård, Johnny
    Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), Institutionen för miljö- och livsvetenskaper.
    Piccolo, John
    Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), Institutionen för miljö- och livsvetenskaper.
    Gustafsson, Pär
    Nilsson, Fredrik
    Länstyrelsen i Västra Göralands län.
    Hart, Paul
    University of Leicester.
    Atlantic salmon and brown trout in Lake Vänern: A proposal for a co-management system2014Inngår i: Aquatic Ecosystem Health & Management, ISSN 1463-4988, E-ISSN 1539-4077, Vol. 17, nr 4, s. 365-373Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Co-management is of increasing interest for fisheries management. We explore possibilities for, and barriers to, developing a co-management system, using threatened populations of landlocked Atlantic Salmon and Brown Trout as examples. Good management of natural resources requires not only knowledge about the resource but also suitable tools to collect information and make decisions. In large ecosystems this can be difficult because many actors are involved, and various societal borders and traditions become barriers. Vänern is the largest lake in the EU and it holds several distinct populations of large-bodied landlocked Atlantic Salmon and Brown Trout. The lake is used for commercial, subsistence, and sport fishing as well as for other recreational activities, and in Klarälven, the largest river entering Vänern, sport fishing is popular. These salmonid populations were at critically low levels during the 1960s, but a stocking program since then has maintained the fishery, and at least one wild stock appears to be recovering since being protected in 1993. Ecosystem users all have different needs: in the lake, sport fishermen say that catches of hatchery fish have declined, and commercial fishermen have focused on other species. In the river, wild salmon may be recovering: sport fishing is popular and an ongoing project investigates the possibilities for salmon to be able to circumvent hydro-electrical plants and reach historical Norwegian spawning areas. Not only do we lack information about the salmonids’ different life stages, we also lack a suitable socio-political organization to find sustainable solutions to the different needs of diverse user groups. We argue that a co-management system that enfranchises user groups in the Vänern-Klarälven ecosystem will improve sustainable management of wild and hatchery fish.

  • 10.
    Bergman, Eva
    et al.
    Karlstads universitet, Fakulteten för samhälls- och livsvetenskaper, Avdelningen för biologi.
    Piccolo, John
    Karlstads universitet, Fakulteten för samhälls- och livsvetenskaper, Avdelningen för biologi.
    Greenberg, Larry
    Karlstads universitet, Fakulteten för samhälls- och livsvetenskaper, Avdelningen för biologi.
    Raising brown trout (Salmo trutta) with less food - effects on smolt development and fin damage2013Inngår i: Aquaculture Research, ISSN 1355-557X, E-ISSN 1365-2109, Vol. 44, s. 1002-1006Artikkel i tidsskrift (Fagfellevurdert)
  • 11.
    Bergman, Eva
    et al.
    Karlstads universitet, Fakulteten för samhälls- och livsvetenskaper, Avdelningen för biologi.
    Piccolo, John
    Karlstads universitet, Fakulteten för samhälls- och livsvetenskaper, Avdelningen för biologi.
    Norrgård, Johnny
    Karlstads universitet, Fakulteten för samhälls- och livsvetenskaper, Avdelningen för biologi.
    Greenberg, Larry
    Karlstads universitet, Fakulteten för samhälls- och livsvetenskaper, Avdelningen för biologi.
    Schmitz, Monika
    Karlstads universitet, Fakulteten för samhälls- och livsvetenskaper, Avdelningen för biologi.
    Landlocked migrating salmonids in large regulated systems2010Konferansepaper (Fagfellevurdert)
  • 12. Boldt, Jennifer L.
    et al.
    Haldorson, Lewis J.
    Piccolo, John
    Karlstads universitet, Fakulteten för samhälls- och livsvetenskaper, Avdelningen för biologi.
    Armstrong, Jan
    Beauchamp, Dave
    Davis, Nancy
    Myers, Kate
    Walker, Trey
    Relationships of Growth, Condition and Feeding to the Survival of Juvenile Pink Salmon in the Coastal Gulf of Alaska2005Konferansepaper (Annet (populærvitenskap, debatt, mm))
  • 13. Bryant, M.D.
    et al.
    Gomi, T.
    Piccolo, John
    Karlstads universitet, Fakulteten för samhälls- och livsvetenskaper, Avdelningen för biologi.
    Headwater Streams in Southeast Alaska: Why Do We Care?2005Konferansepaper (Annet (populærvitenskap, debatt, mm))
    Abstract [en]

    Headwater streams may comprise more than 70% of the area of a watershed and until recently, they have been largely over-looked by managers and ecologists in Southeast Alaska and elsewhere. However, their importance in shaping downstream processes is

    becoming more widely recognized. Recently, a series of studies were completed in Southeast Alaska that examined the physical and biological features of headwater streams. We review and synthesize these studies to define headwater stream characteristics in Southeast Alaska, describe some processes that occur in these streams, and discuss their importance to watersheds. Alterations in large wood abundance and

    distribution have predictable effects on sediment storage and transport in headwater streams. Legacy wood remaining in streams more than 25 yrs after logging was an important structural component. Invertebrate populations captured in drift samples are

    diverse, and more than 60 % of the taxa were aquatic. Downstream transport of invertebrate drift from reaches without fish may be an important to juvenile fish residing in the lower reaches. Drift density is inversely related to stream discharge, so small

    streams may provide better foraging and growth potential. Resident and anadromous fish live and spawn in headwater reaches with gradients > 10 % and occupied small step pools formed by large woody debris. Dolly Varden were the dominant species in higher gradient reaches, but juvenile coho were also present. Steelhead were seasonal residents. Headwater streams link hill slope processes to watersheds and can have important consequences for salmonid populations throughout a watershed

  • 14. Bryant, M.D.
    et al.
    Gomi, T.
    Piccolo, John
    Karlstads universitet, Fakulteten för samhälls- och livsvetenskaper, Avdelningen för biologi.
    Structures Linking Physical and Biological Processes in Headwater Streams of the Maybeso Watershed, Southeast Alaska2007Inngår i: Forest Science 53:371-383Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    We focus on headwater streams originating in the mountainous terrain of northern temperate rain forests. These streams rapidly descend from gradients greater than 20% to less than 5% in U-shaped glacial valleys. We use a set of studies on headwater streams in southeast Alaska to define headwater stream catchments, link physical and biological processes, and describe their significance within watersheds. We separate headwater stream systems into four units that have distinct hydrologic and geomorphic processes that link terrestrial processes to aquatic systems. Headwater streams collect, process, and transport material downstream. Physical and biological processes in headwater streams are complex and closely tied to terrestrial processes. Steps and step pools formed by large wood are keystone structures that link physical processes to biological processes and increase channel complexity. Large and coarse wood debris dams form in-channel step structures and act as valves that regulate the downstream flow of material. A large amount of inorganic and organic sediment is stored in step structures, which may be biological hotspots in headwater streams. Step pools formed by large woody debris are critical habitat for Dolly Varden (Salvelinus malma), juvenile coho salmon (Oncorhynchus kisutch), steelhead (0. mykiss), and cutthroat trout (0. clarkii) in reaches with gradients from less than 4% to those greater than 10%. Landslides and debris flows are the dominant channel-altering processes in headwater streams and remove the step profile. Management activities that increase the number and frequency of channel disturbance events in headwater streams can have important and long-term consequences throughout a watershed

  • 15. Cafaro, Philip
    et al.
    Butler, Tom
    Crist, Eileen
    Cryer, Paul
    Dinerstein, Eric
    Kopnina, Helen
    Noss, Reed
    Piccolo, John
    Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), Institutionen för miljö- och livsvetenskaper (from 2013).
    Taylor, Bron
    Vynne, Carly
    Washington, Haydn
    If we want a whole Earth, Nature Needs Half: a response to Buscher et al.2017Inngår i: Oryx, ISSN 0030-6053, E-ISSN 1365-3008, Vol. 51, nr 3, s. 400-400Artikkel i tidsskrift (Fagfellevurdert)
  • 16.
    Calles, Olle
    et al.
    Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), Institutionen för miljö- och livsvetenskaper.
    Griffioen, Ben
    IMARES Wageningen UR, Netherlands.
    Winter, Erwin
    IMARES Wageningen UR, Netherlands.
    Watz, Johan
    Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), Institutionen för miljö- och livsvetenskaper.
    Nyqvist, Daniel
    Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), Institutionen för miljö- och livsvetenskaper.
    Hagelin, Anna
    Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), Institutionen för miljö- och livsvetenskaper.
    Gustafsson, Stina
    Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), Institutionen för miljö- och livsvetenskaper.
    Österling, Martin
    Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), Institutionen för miljö- och livsvetenskaper.
    Piccolo, John
    Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), Institutionen för miljö- och livsvetenskaper.
    Greenberg, Larry
    Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), Institutionen för miljö- och livsvetenskaper.
    Bergman, Eva
    Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), Institutionen för miljö- och livsvetenskaper.
    Fish Migration River Monitoring Plan2014Rapport (Annet vitenskapelig)
    Abstract [en]

    Fish have problems passing the Afsluitdijk Dam that separates the Wadden Sea from Lake IJsselmeer. To re-establish the connectivity and thereby allow fish to pass there is an initiative to build a fishway, the Fish Migration River (FMR), at the Konwerderzand sluice complex. This report proposes a monitoring program to evaluate the functionality of the FMR, but also to monitor passage possibilities through the existing sluices. The goals of the monitoring plan are to estimate 1) The overall passage past the Afsluitdijk dam to and from Lake IJsselmeer, 2) The attraction efficiency, 3) The passage efficiency, and 4) The use of the FMR as habitat and for acclimatization for the transition into freshwater.

    We present an overview of previous and ongoing monitoring in the area to establish the current state of knowledge. The report also includes a presentation of available and suitable methods for a future monitoring program considering the broad spectra of target fish species, and their abundances. The proposed program includes a description of study design and available techniques and cost-estimates of the monitoring program.

    The proposed program will target ten species: European eel (aal), flounder (bot), three-spined stickleback (dreidoornige stekelbaars), twait shad (fint), North Sea houting (houting), river lamprey (rieverprik), smelt (spiering), Atlantic salmon (zalm), brown trout (forel) and sea lamprey (zeeprik). The monitoring program includes plans for how to capture, tag and track the study fish using the most suitable tagging techniques. Furthermore, the most optimal sites for installation of automatic data detection stations are identified.

    The total cost for the proposed project is 3.5 M€ and covers both investments in equipment and costs for personnel. However, if costs for investments in techniques such as RFId-stations and fish counters are excluded, the total cost is reduced to 1 M€ for a program running two years before and four years after the completion of the FMR. The program is considered sufficient to evaluate the FMR at Kornwerederzand from the most important perspectives: the overall passage efficiency and the use of the FMR as habitat.

    It should be noted that this report is the first step towards a full-scale monitoring program, giving insight into possible methods, study design and associated costs. The next important step will be to develop the program in more detail and to start the initial phase of the monitoring project. We predict that such activities will identify the need for, and the relevance of, a more extensive monitoring program to study the effects of the FMR on a population level and on a large geographical scale.

  • 17.
    Filipsson, Karl
    et al.
    Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), Institutionen för miljö- och livsvetenskaper (from 2013). Göteborgs universitet.
    Petersson, Tina
    Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), Institutionen för miljö- och livsvetenskaper (from 2013).
    Hojesjo, Johan
    Göteborgs universitet.
    Piccolo, John
    Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), Institutionen för miljö- och livsvetenskaper (from 2013).
    Naslund, Joacim
    Göteborgs universitet.
    Wengstrom, Niklas
    Göteborgs universitet; Swedish Anglers Assoc, Gothenburg,.
    Österling, Martin
    Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), Institutionen för miljö- och livsvetenskaper (from 2013).
    Heavy loads of parasitic freshwater pearl mussel (Margaritifera margaritifera L.) larvae impair foraging, activity and dominance performance in juvenile brown trout (Salmo trutta L.)2018Inngår i: Ecology of Freshwater Fish, ISSN 0906-6691, E-ISSN 1600-0633, Vol. 27, nr 1, s. 70-77Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    The life cycle of the endangered freshwater pearl mussel (Margaritifera margaritifera) includes a parasitic larval phase (glochidia) on the gills of a salmonid host. Glochidia encystment has been shown to affect both swimming ability and prey capture success of brown trout (Salmo trutta), which suggests possible fitness consequences for host fish. To further investigate the relationship between glochidia encystment and behavioural parameters in brown trout, pairs (n = 14) of wild-caught trout (infested vs. uninfested) were allowed to drift feed in large stream aquaria and foraging success, activity, agonistic behaviour and fish coloration were observed. No differences were found between infested and uninfested fish except for in coloration, where infested fish were significantly darker than uninfested fish. Glochidia load per fish varied from one to several hundred glochidia, however, and high loads had significant effects on foraging, activity and behaviour. Trout with high glochidia loads captured less prey, were less active and showed more subordinate behaviour than did fish with lower loads. Heavy glochidia loads therefore may negatively influence host fitness due to reduced competitive ability. These findings have implications not only for management of mussel populations in the streams, but also for captive breeding programmes which perhaps should avoid high infestation rates. Thus, low levels of infestation on host fish which do not affect trout behaviour but maintains mussel populations may be optimal in these cases.

  • 18. Fisher, J.
    et al.
    Trudel, M.
    Ammann, A.
    Orsi, J.A.
    Piccolo, John
    Karlstads universitet, Fakulteten för samhälls- och livsvetenskaper, Avdelningen för biologi.
    Bucher, C.
    Casillas, E.
    Harding, J.A.
    MacFarlane, R.B.
    Brodeur, R.D.
    Comparisons of the coastal distributions and abundances of juvenile Pacific salmon from Central California to the Northern Gulf of Alaska2007Inngår i: American Fisheries Society Symposium 57:31-80Artikkel i tidsskrift (Fagfellevurdert)
  • 19.
    Frank, Beatrice M.
    et al.
    Belgium.
    Piccolo, John J.
    Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), Institutionen för miljö- och livsvetenskaper.
    Baret, Philippe V.
    Belgium.
    A review of ecological models for brown trout: towards a new demogenetic model2011Inngår i: Ecology of Freshwater Fish, ISSN 0906-6691, E-ISSN 1600-0633, Vol. 20, nr 2, s. 167-198Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Ecological models for stream fish range in scale from individual fish to entire populations. They have been used to assess habitat quality and to predict the demographic and genetic responses to management or disturbance. In this paper, we conduct the first comprehensive review and synthesis of the vast body of modelling literature on the brown trout, Salmo trutta L., with the aim of developing the framework for a demogenetic model, i.e., a model integrating both population dynamics and genetics. We use a bibliometric literature review to identify two main categories of models: population ecology (including population dynamics and population genetics) and population distribution (including habitat–hydraulic and spatial distribution). We assess how these models have previously been applied to stream fish, particularly brown trout, and how recent models have begun to integrate them to address two key management and conservation questions: (i) How can we predict fish population responses to management intervention? and (ii) How is the genetic structure of fish populations influenced by landscape characteristics? Because salmonid populations tend to show watershed scale variation in both demographic and genetic traits, we propose that models combining demographic, genetic and spatial data are promising tools for improving their management and conservation. We conclude with a framework for an individual-based, spatially explicit demogenetic model that we will apply to stream-dwelling brown trout populations in the near future.

  • 20.
    Hagelin, Anna
    et al.
    Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), Institutionen för miljö- och livsvetenskaper.
    Calles, Olle
    Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), Institutionen för miljö- och livsvetenskaper.
    Greenberg, Larry
    Karlstads universitet, Fakulteten för samhälls- och livsvetenskaper, Avdelningen för biologi.
    Piccolo, John J.
    Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), Institutionen för miljö- och livsvetenskaper.
    Bergman, Eva
    Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), Institutionen för miljö- och livsvetenskaper.
    Spawning migration of wild and supplementary stocked landlocked atlantic salmon (Salmo Salar)2016Inngår i: Rivers Research and Applications: an international journal devoted to river research and management, ISSN 1535-1459, E-ISSN 1535-1467, Vol. 32, nr 3, s. 383-389Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Upstream migration by adult salmonids is impeded by dams in many regulated rivers, as is the case for landlocked Atlantic salmon, Salmo salar, in the River Klarälven, Sweden. There, the salmon cannot reach the spawning grounds due to the presence of eight dams. Hence, hatchery-reared smolts are released downstream of the dams, and upstream migrating spawners are caught in a trap at the lowermost dam before transported by truck to the spawning grounds past the dams. To identify the spawning grounds and compare the behavior of wild and hatchery-reared Atlantic salmon during upstream migration and spawning, 34 wild and 28 hatchery-reared, radio-tagged Atlantic salmon were followed during their spawning migration from August to October 2011. Half (50%) of the hatchery fish, but only 11,8% of the wild fish ended up as fallbacks, i.e. they migrated past the first downstream power station, and did not spawn. A significantly higher proportion (21.4%) of hatchery- reared salmon moved in an erratic way, with several up and down stream movements, when compared to the wild salmon (5.9%). When looking at the salmon that stayed in the river (exc. fallbacks), wild individuals exhibited a holding behavior (little or no movements before presumed spawning) more often (86.7%) than the reared ones (50%). The wild salmon also held position (and presumably spawned) for longer time (25.4 days) than the reared salmon (16.1 days). Reared salmon held position, on average, 10 km further upstream than wild salmon, passing the presumed best-quality spawning habitat. The migration speed (average 17.4 km/day) between two logger stations did not differ between wild and reared fish or between sexes. Our results suggest that the reproductive success of hatchery-reared Atlantic salmon is relatively low and their capacity as supplementary spawners to the wild population in the Klarälven, is probably small.

  • 21. Haldorson, L.
    et al.
    Piccolo, John
    Karlstads universitet, Fakulteten för samhälls- och livsvetenskaper, Avdelningen för biologi.
    Boldt, J
    Effects of marine habitats on growth, condition and survival of juvenile pink salmon in the coastal Gulf of Alaska2004Konferansepaper (Fagfellevurdert)
    Abstract [en]

    Juvenile pink salmon are produced from four hatcheries in Prince William Sound (PWS). During their first summer at sea they occur in PWS, the Alaska Coastal Current (ACC) and in shelf water seaward of the ACC front. In July, fish are in PWS and in ACC water, but rarely in shelf water. By August, they also occur in shelf water. In August, fish size differed among habitats. In 2002 and 2003 fish in shelf water were larger than those in the ACC or PWS; whereas in 2001 fish in shelf water were smaller than in ACC or PWS. Habitat-related size differences were usually found in all hatchery cohorts. Fish condition varied in a similar way. Fish in shelf water were in better condition than ACC fish in 2002 and 2003, but were in poorer condition in 2001. Habitat use, size and condition patterns may have been related to feeding and zooplankton availability. The habitat differences we observed in fish size and condition may have important implications for marine survival. There are indications that juvenile salmon reaching a critical size by the start of their first winter at sea have higher over-winter survival. If the critical size hypothesis holds for pink salmon, larger individuals in August may be more likely to return as adults in the following summer. Our observations are consistent with this hypothesis - hatchery fish that were released in 2001 had very low survival, whereas those released in 2002 had exceptionally high survival. These observations suggest that conditions in shelf water during late summer affect overall survival of juvenile pink salmon.

  • 22. Haldorson, Lewis J.
    et al.
    Adkison, Milo
    Piccolo, John
    Karlstads universitet, Fakulteten för samhälls- och livsvetenskaper, Avdelningen för biologi.
    Boldt, Jennifer L.
    Miller, Sara
    Habitat Effects on Condition and Growth of Juvenile Pink Salmon in the Northern Gulf of Alaska2007Konferansepaper (Annet (populærvitenskap, debatt, mm))
  • 23. Haldorson, Lewis J.
    et al.
    Adkison, Milo
    Piccolo, John
    Karlstads universitet, Fakulteten för samhälls- och livsvetenskaper, Avdelningen för biologi.
    Boldt, Jennifer L.
    Miller, Sara
    US GLOBEC Northeast Pacific Pink Salmon Annual Report2006Rapport (Annet vitenskapelig)
  • 24. Haldorson, Lewis J.
    et al.
    Boldt, Jennifer L.
    Piccolo, John
    Karlstads universitet, Fakulteten för samhälls- och livsvetenskaper, Avdelningen för biologi.
    Armstrong, Janet
    Beaucamp, David
    Myers, Katherine
    Growth, condition and survival of juvenile pink salmon in the coastal Gulf of Alaska: marine habitat is important2004Konferansepaper (Fagfellevurdert)
  • 25.
    Hart, Paul BJ
    et al.
    Department of Biology, University of Leicester, Leicester LE1 7RH, UK.
    Bergman, Eva
    Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), Institutionen för miljö- och livsvetenskaper.
    Calles, Olle
    Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), Institutionen för miljö- och livsvetenskaper.
    Eriksson, Stina
    Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), Institutionen för miljö- och livsvetenskaper.
    Gustafsson, Stina
    Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), Institutionen för miljö- och livsvetenskaper.
    Lans, Linnea
    Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), Institutionen för miljö- och livsvetenskaper.
    Norrgård, Johnny R
    Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), Institutionen för miljö- och livsvetenskaper.
    Piccolo, John J
    Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), Institutionen för miljö- och livsvetenskaper.
    Rees, Nina
    Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), Institutionen för miljö- och livsvetenskaper.
    Watz, Johan
    Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), Institutionen för miljö- och livsvetenskaper.
    Österling, Martin
    Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), Institutionen för miljö- och livsvetenskaper.
    Greenberg, Larry
    Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), Institutionen för miljö- och livsvetenskaper.
    Familiarity with a partner facilitates the movementof drift foraging juvenile grayling (Thymallus thymallus) into a new habitatarea2014Inngår i: Environmental Biology of Fishes, ISSN 0378-1909, E-ISSN 1573-5133, Vol. 97, nr 5, s. 515-522Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Preferring one social partner over another can enhance fitness. This paper reports that juvenile grayling were significantly more likely to enter and forage in new, upstream habitats when paired with familiar versus unfamiliar social partners. Fish paired with unfamiliar partners or when alone were more reluctant to enter the new area. The entry times for both fish in a familiar pair were significantly correlated, but uncorrelated for unfamiliar fish. These differences between familiars and unfamiliars were consistent over a 2-week period. Fish with familiar partners spent more time within three body lengths of each other than did those with unfamiliars. The results are discussed in relation to optimality models of drift foraging, which do not included sociality. It is suggested that the social dimension creates a more dynamic foraging response to variable environmental conditions and could have consequences for growth.

  • 26.
    Kopnina, Helen
    et al.
    Leiden Univ, Inst Cultural Anthropol & Dev Sociol, Fac Social & Behav Sci, Leiden, Netherlands.
    Washington, Haydn
    Univ New South Wales, PANGEA Res Ctr, Biol Earth & Environm Sci, Level 5,Biol Sci Bldg Australia.
    Taylor, Bron
    Univ Florida, Coll Liberal Arts & Sci, Gainesville, FL .
    Piccolo, John
    Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), Institutionen för miljö- och livsvetenskaper (from 2013).
    Anthropocentrism: More than just a misunderstood problem2018Inngår i: Journal of Agricultural and Environmental Ethics, ISSN 1187-7863, E-ISSN 1573-322X, Vol. 31, nr 1, s. 109-127Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Anthropocentrism, in its original connotation in environmental ethics, is the belief that value is human-centred and that all other beings are means to human ends. Environmentally -concerned authors have argued that anthropocentrism is ethically wrong and at the root of ecological crises. Some environmental ethicists argue, however, that critics of anthropocentrism are misguided or even misanthropic. They contend: first that criticism of anthropocentrism can be counterproductive and misleading by failing to distinguish between legitimate and illegitimate human interests. Second, that humans differ greatly in their environmental impacts, and consequently, addressing human inequalities should be a precondition for environmental protection. Third, since ecosystems constitute the "life-support system" for humans, anthropocentrism can and should be a powerful motivation for environmental protection. Fourth, human self-love is not only natural but helpful as a starting point for loving others, including nonhumans. Herein we analyze such arguments, agreeing with parts of them while advancing four counter-arguments. First, redefining the term anthropocentrism seems to be an attempt to ignore behavior in which humans focus on themselves at the risk of the planet. Second, if addressing human inequalities is a precondition for environmental protection, biodiversity protection will remain out of the scope of ethical consideration for an indefinite period of time. Third, anthropocentric motivations can only make a positive contribution to the environment in situations where humans are conscious of a direct benefit to themselves. Fourth, 'self-love' alone is an inadequate basis for environmental concern and action. We also explore the question of agency, shared responsibility, and a fair attribution of blame for our environmental predicaments.

  • 27.
    Lafage, Denis
    et al.
    Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), Institutionen för miljö- och livsvetenskaper (from 2013).
    Bergman, Eva
    Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), Institutionen för miljö- och livsvetenskaper (from 2013).
    Eckstein, Rolf Lutz
    Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), Institutionen för miljö- och livsvetenskaper (from 2013).
    Österling, Martin
    Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), Institutionen för miljö- och livsvetenskaper (from 2013).
    Sadler, J. P.
    University of Birmingham.
    Piccolo, John
    Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), Institutionen för miljö- och livsvetenskaper (from 2013).
    Local and landscape drivers of aquatic-to-terrestrial subsidies in riparian ecosystems: a worldwide meta-analysis2019Inngår i: Ecosphere, ISSN 2150-8925, E-ISSN 2150-8925, Vol. 10, nr 4, artikkel-id e02697Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Cross-boundary fluxes of organisms and matter, termed “subsidies,” are now recognized to be reciprocal and of roughly equal importance for both aquatic and terrestrial systems, even if terrestrial input to aquatic ecosystems has received most attention. The magnitude of aquatic-to-terrestrial subsidies is well documented, but the drivers behind these subsidies and their utilization by terrestrial consumers are characteristically local-scale studies, limiting the inferences that can be drawn for broader geographic scales. We therefore built and analyzed a database of stable isotope data extracted from 21 studies worldwide, to identify both landscape-scale (catchment) and local-scale (100-m riparian zone) variables that may affect the diet of terrestrial predators in riparian ecosystems. Our meta-analysis revealed a greater magnitude of aquatic-to-terrestrial subsidies (>50%) than previously reported, albeit with large geographic and inter-annual variations. Moreover, we demonstrated a large effect of landscape-scale factors on aquatic-to-terrestrial subsidies, particularly anthropogenic land use and tree cover. Local human population was the only relevant factor at the local scale. We also found that studies on landscape-scale and anthropogenic land use effects on aquatic-to-terrestrial subsidies are strongly under-represented in the ecological literature, which limits the general inferences that can currently be drawn about landscape effects. We suggest that landscape-scale studies could improve our understanding of how land use and environmental change might influence future patterns of biodiversity and ecosystem function.

  • 28. Malick, Michael J.
    et al.
    Haldorson, Lewis J.
    Piccolo, John
    Karlstads universitet, Fakulteten för samhälls- och livsvetenskaper, Avdelningen för biologi.
    Boldt, Jennifer L.
    Growth and survival in relation to body size of juvenile pink salmon in the northern Gulf of Alaska2011Inngår i: Marine and Coastal Fisheries, ISSN 1942-5120, Vol. 3, nr 1, s. 261-270Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    The abundance of anadromous salmon is partially determined by size-selective mortality during the early marine life phase. Consequently, identifying the growth patterns of juvenile salmon during this life phase is important in understanding the dynamics of salmon populations. We examined patterns of early marine growth in juvenile pink salmon Oncorhynchus gorbuscha released by four hatcheries in Prince William Sound (PWS), Alaska, and explored how these patterns related to marine survival. Since larger individuals are thought to experience reduced mortality, we partitioned the data into weight-based quartiles and compared growth rates (% body weight/d) of all fish, the largest fish (top 25%), and the smallest fish (bottom 25%). Sampling occurred during summer 1997–2004 in PWS, the inshore Gulf of Alaska (GOA), and the offshore GOA. Growth rates varied significantly among years and sampling locations; however, the growth rate patterns were markedly similar among size-groups and hatcheries. Growth rates tended to be high in 1997, 2002, and 2004 and lower in 1998, 2001, and 2003. Fish sampled in the offshore GOA typically had faster growth rates than those sampled elsewhere, although this was less pronounced for the largest fish. For all size-groups, the relationship between survival and growth rate was strongest for fish captured in the offshore GOA and weakest for those captured in PWS, indicating that the likelihood of survival is greater for juveniles that migrate offshore earlier. The strength of the growth rate–survival relationship for pink salmon captured in the offshore GOA was similar among all size-groups, suggesting that once fish migrate offshore they are less vulnerable to size-selective predation.

  • 29. Malick, M.J
    et al.
    Haldorson, L
    Piccolo, John
    Karlstads universitet, Fakulteten för samhälls- och livsvetenskaper, Avdelningen för biologi.
    Characterizing Habitat Specific Size, Condition, and Growth of Juvenile Pink Salmon in the Northern Gulf of Alaska2009Konferansepaper (Fagfellevurdert)
  • 30.
    Norrgård, Johnny R
    et al.
    Karlstads universitet, Fakulteten för samhälls- och livsvetenskaper, Avdelningen för biologi.
    Greenberg, Larry A
    Karlstads universitet, Fakulteten för samhälls- och livsvetenskaper, Avdelningen för biologi.
    Piccolo, John J
    Karlstads universitet, Fakulteten för samhälls- och livsvetenskaper, Avdelningen för biologi.
    Schmitz, Monika
    Uppsala university.
    Bergman, Eva
    Karlstads universitet, Fakulteten för samhälls- och livsvetenskaper, Avdelningen för biologi.
    Multiplicative loss of landlocked Atlantic salmon Salmo salar L. smolts during downstream migration through multiple dams2013Inngår i: Rivers Research and Applications: an international journal devoted to river research and management, ISSN 1535-1459, E-ISSN 1535-1467, Vol. 29, nr 10, s. 1306-1317Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Relatively little is known about the downstream migration of landlocked stocks of Atlantic salmon Salmo salar L. smolts, as earlier migration studies have generally focused on upstream migration. However, in watersheds with many hydroelectric plants (HEPs), multiplicative loss of downstream-migrating salmon smolts can be high, contributing to population declines or extirpations. Here we report the results from a study of wild landlocked Atlantic salmon smolts in the River Klaralven. Salmon smolts, tagged with acoustic transmitters, were released at different locations and followed as they passed 37 receivers along a 180-km-long river segment, including eight dams as well as free-flowing control stretches. We found that 16% of the smolts successfully migrated along the entire river segment. Most losses occurred during HEP passages, with 76% of the smolts being lost during these passages, which contrasts with the 8% smolt loss along unregulated control stretches. Migration speed was 83% slower along regulated stretches than along unregulated stretches. The observed lower migration speed at regulated stretches was dependent on fish size, with large fish moving slower than small fish. Discharge affected migration speed but not losses. As previously shown for anadromous populations, our study of landlocked salmon demonstrates similar negative effects of multiple passages of HEPs by downstream-migrating smolts. On the basis of this and previous migration studies, we advocate using a holistic approach in the management and conservation of migratory fish in regulated rivers, which includes safe passage for both upstream- and downstream-migrating fish. Copyright (c) 2012 John Wiley & Sons, Ltd.

  • 31.
    Obregón, C.
    et al.
    Estuaries & Wetlands Conservation Programmes, Conservation Programmes Department, Zoological Society of London, Regents Park, London.
    Lyndon, A. R.
    Centre for Marine Biodiversity and Biotechnology, Institute of Life and Earth Sciences, Heriot-Watt University, John Muir Building, Edinburgh, United Kingdom.
    Barker, J.
    Estuaries & Wetlands Conservation Programmes, Conservation Programmes Department, Zoological Society of London, Regents Park, London, United Kingdo.
    Christiansen, H.
    Laboratory of Biodiversity and Evolutionary Genomics, Department of Biology, KU Leuven.
    Godley, B. J.
    Centre for Ecology and Conservation, Daphne du Maurier Building, College of Life and Environmental Sciences, Department of Biosciences, University of Exeter,.
    Kurland, S.
    Populations genetics, Department of Zoology, Stockholm University, Stockholm.
    Piccolo, John
    Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), Institutionen för miljö- och livsvetenskaper (from 2013).
    Potts, R.
    Biosciences, College of Life and Environmental Sciences, Department of Biosciences, University of Exeter.
    Short, R.
    Department of Life Sciences, Imperial College London, Silwood Park Campus, Buckhurst Road, Ascot, United Kingdom.
    Tebb, A.
    Sussex Inshore Fisheries and Conservation Authority, Shoreham-by-Sea, West Sussex, United Kingdom.
    Mariani, S.
    School of Environment and Life Sciences, University of Salford, Peel Building, Salford, United Kingdom.
    Valuing and understanding fish populations in the Anthropocene: Key questions to address2018Inngår i: Journal of Fish Biology, ISSN 0022-1112, E-ISSN 1095-8649, Vol. 92, nr 3, s. 828-845Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Research on the values of fish populations and fisheries has primarily focused on bio-economic aspects; a more nuanced and multidimensional perspective is mostly neglected. Although a range of social aspects is increasingly being considered in fisheries research, there is still no clear understanding as to how to include these additional values within management policies nor is there a cogent appreciation of the major knowledge gaps that should be tackled by future research. This paper results from a workshop held during the 50th anniversary symposium of the Fisheries Society of the British Isles at the University of Exeter, UK, in July 2017. Here, we aim to highlight the current knowledge gaps on the values of fish populations and fisheries thus directing future research. To this end, we present eight questions that are deeply relevant to understanding the values of fish populations and fisheries. These can be applied to all habitats and fisheries, including freshwater, estuarine and marine.

  • 32. Orlikowska, Ewa H.
    et al.
    Piccolo, John
    Karlstads universitet, Fakulteten för samhälls- och livsvetenskaper, Avdelningen för biologi.
    A biological risk assessment for an Atlantic salmon colonization in Alaska2007Rapport (Fagfellevurdert)
  • 33.
    Piccolo, John
    Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), Institutionen för miljö- och livsvetenskaper.
    Book Review: For the Love of Rivers: A Scientist's Journey Author: Kurt D. Fausch, Oregon State University Press, 2015, ISBN 978‐0‐87071‐770‐3 (pbk), B&W Illustrations. Figures. Maps. Notes, 288 pages.2016Inngår i: Fish and Fisheries, ISSN 1467-2960, E-ISSN 1467-2979, Vol. 17, nr 4, s. 1236-1237Artikkel, omtale (Annet vitenskapelig)
  • 34.
    Piccolo, John
    Karlstads universitet, Fakulteten för samhälls- och livsvetenskaper, Avdelningen för biologi.
    Can the net energy intake hypothesis be used to explain microhabitat segregation by sympatric juvenile coho salmon and steelhead trout?2003Konferansepaper (Fagfellevurdert)
    Abstract [en]

    Juvenile coho and steelhead are found sympatrically in steams thoughout the Pacific Northwest and Alaska. Empirical evidence shows that the species segregate microhabitat, with coho typically occupying pools and steelhead occupying riffles or runs. Although most biologists could probably accurately predict what section of stream might be considered coho or steelhead habitat, most would be at a loss to explain why. In an attempt to test one possible explanation, i.e., that each species maximizes its net energy intake at its respective preferred water velocity, I conducted stream tank experiments to assess the influence of water velocity on prey capture probability and net energy intake. Because steelhead are typically found in faster water velocities than are coho, I hypothesized that steelhead would maximize their net energy intake at a faster velocity. Five fish of each species were tested individually at each of six water velocities spanning the observed velocity range for both species. Feeding trials were videotaped with two cameras to facilitate 3-D analyses of the fishs prey capture area. These analyses provide an accurate measure of the temporal and spatial dynamics of prey capture maneuvers, and allow me to develop prey capture probability- and net energy intake-contours for each species at the different water velocities. The results of these and similar experiments on the effects of water depth will be used to develop and field-test habitat selection models for coho and steelhead that integrate physical habitat features with the bioenergetic costs and benefits for each species

  • 35.
    Piccolo, John
    Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), Institutionen för miljö- och livsvetenskaper (from 2013).
    Conservation genomics: coming to a salmonid near you2016Inngår i: Journal of Fish Biology, ISSN 0022-1112, E-ISSN 1095-8649, Vol. 89, nr 6, s. 2735-2740Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Using the examples on hereditary and environmental factors affecting salmonid populations, this paper demonstrates that ecologists have long appreciated the importance of local adaptation and intraspecific diversity for salmonid conservation. Conservationists, however, need to embrace the genomics revolution and use new insights to improve salmonid management. At the same time, researchers must be forthcoming with the uses and limitations of genomics, and conservation must move forward in the face of scientific uncertainty.

  • 36.
    Piccolo, John
    Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), Institutionen för miljö- och livsvetenskaper.
    Depth, velocity, and foraging success in two sympatric stream salmonids: implications for habitat selection and segregation2008Konferansepaper (Annet (populærvitenskap, debatt, mm))
  • 37.
    Piccolo, John
    Karlstads universitet, Fakulteten för samhälls- och livsvetenskaper, Avdelningen för biologi.
    Ecology, local adaptation, and conservation of salmon and trout2010Konferansepaper (Annet (populærvitenskap, debatt, mm))
    Abstract

    The new International Research School for Applied Ecology will focus on research that is relevant to natural resource management. In this presentation I will discuss how ecological research has informed management of salmon and trout, and ways in which I hope it will continue to do so. Salmonids show great plasticity in life history traits such as age and growth, and tremendous intra-specific diversity. This diversity is of great practical value because salmonids are highly-prized commercial, sport, and subsistence fish. Due largely to human activities such as fishing, resource extraction, and development, many native salmonid populations have declined, and much diversity has already been lost. Conservation of the remaining salmonid biodiversity will require enlightened management, informed by sound ecological science. Because salmonids home to their natal streams to spawn, populations tend to become reproductively isolated, leading to adaptations to local environmental conditions. I give examples of local adaptation in salmonids, and discuss why this mandates the need for life history-based management informed by ecological research. The principles I discuss probably apply more or less to other aquatic and terrestrial taxa as well, and they should be of use in demonstrating the important link between ecology and conservation

  • 38.
    Piccolo, John
    Karlstads universitet, Fakulteten för samhälls- och livsvetenskaper, Avdelningen för biologi.
    Fish fork length data from CGOA trawl cruises conducted from 1997-20042009Rapport (Fagfellevurdert)
  • 39.
    Piccolo, John
    Karlstads universitet, Fakulteten för samhälls- och livsvetenskaper, Avdelningen för biologi.
    Gasping Fish and Panting Squids: Oxygen, Temperature and the Growth of Water-Breathing Animals2012Inngår i: Fish and Fisheries, ISSN 1467-2960, E-ISSN 1467-2979, Vol. 13, nr 3, s. 359-Artikkel, omtale (Annet vitenskapelig)
  • 40.
    Piccolo, John
    Karlstads universitet, Fakulteten för samhälls- och livsvetenskaper, Avdelningen för biologi.
    GLOBEC Northeast Pacific, Coastal Gulf of Alaska Cruise Report2004Rapport (Annet vitenskapelig)
  • 41.
    Piccolo, John
    Karlstads universitet, Fakulteten för samhälls- och livsvetenskaper, Avdelningen för biologi.
    GLOBEC Northeast Pacific, Coastal Gulf of Alaska Cruise Report2003Rapport (Annet vitenskapelig)
  • 42.
    Piccolo, John
    Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), Institutionen för miljö- och livsvetenskaper (from 2013).
    Intrinsic values in nature: Objective good or simply half of an unhelpful dichotomy?2017Inngår i: Journal for Nature Conservation, ISSN 1617-1381, E-ISSN 1618-1093, Vol. 37, s. 8-11Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Two generations of conservationists and philosophers have built a strong case for intrinsic values in nature; they are the basis of the normative postulates of conservation biology. I argue that the recognition of intrinsic natural value is a fundamental and non-negotiable aspect of an eco-evolutionary worldview. Recently, relational values, "preferences, principles, and virtues associated with relationships", have been proposed as a third category of values in nature, which may help to resolve the debate between instrumental and intrinsic valuation. By depicting intrinsic values as part of an unhelpful dichotomy between anthropocentric and ecocentric values, the current assessment of relational values fails to adequately account for the modern philosophical view of intrinsic natural value. The recognition of intrinsic natural value is not merely an academic exercise, but rather a vital aspect of conservation of the biosphere; recognition of value entails the obligation to do what is right, i.e., protect the good. Any attempt to reframe the discussion about values and environmental protection through more formal recognition of relational values will need to more clearly address how relational and intrinsic values coexist and how they can jointly form the basis for nature conservation. (C) 2017 The Author. Published by Elsevier GmbH.

  • 43.
    Piccolo, John
    Karlstads universitet, Fakulteten för samhälls- och livsvetenskaper, Avdelningen för biologi.
    Juvenile pink salmon distribution and size in relation to Alaska Coastal Current and shelf waters2004Konferansepaper (Annet (populærvitenskap, debatt, mm))
  • 44.
    Piccolo, John
    Karlstads universitet, Fakulteten för samhälls- och livsvetenskaper, Avdelningen för biologi.
    Modeling Stream Habitat Use of Juvenile Coho Salmon and Steelhead Trout in Southeast Alaska Using Underwater Video2003Rapport (Fagfellevurdert)
  • 45.
    Piccolo, John
    Karlstads universitet, Fakulteten för samhälls- och livsvetenskaper, Avdelningen för biologi.
    Modeling the Distribution, Growth, and Abundance of Juvenile Coho and Steelhead Using 3D Video Analysis2000Konferansepaper (Fagfellevurdert)
  • 46.
    Piccolo, John
    Karlstads universitet, Fakulteten för samhälls- och livsvetenskaper, Avdelningen för biologi.
    Modeling the Mechanisms Linking Stream Habitat Characteristics to the Distribution, Growth, and Abundance of Juvenile Coho Salmon and Steelhead Trout2003Rapport (Annet vitenskapelig)
  • 47.
    Piccolo, John
    Karlstads universitet, Fakulteten för samhälls- och livsvetenskaper, Avdelningen för biologi.
    Modeling the Mechanisms Linking Stream Habitat Characteristics to the Distribution, Growth, and Abundance of Juvenile Coho Salmon and Steelhead Trout2003Rapport (Annet vitenskapelig)
  • 48.
    Piccolo, John
    Karlstads universitet, Fakulteten för samhälls- och livsvetenskaper, Avdelningen för biologi.
    Native fishes of Alaska2002Konferansepaper (Annet (populærvitenskap, debatt, mm))
  • 49.
    Piccolo, John
    Karlstads universitet, Fakulteten för samhälls- och livsvetenskaper, Avdelningen för biologi.
    Native Salmonids of Alaska2000Konferansepaper (Fagfellevurdert)
  • 50.
    Piccolo, John
    Karlstads universitet, Fakulteten för samhälls- och livsvetenskaper, Avdelningen för biologi.
    Report on creation of a Comprehensive OCC/UAF Pink Salmon database2006Rapport (Annet vitenskapelig)
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