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  • 1. Aroua, S.
    et al.
    Rousseau, K.
    Schmitz, Monika
    Chang, C.F.
    Elie, P.
    Dufour, S.
    The Gonadoliberin(s)-gonadotropin(s) axis in the eel: expression and regulation under induced maturation and sex steroid feedbacks2007Conference paper (Refereed)
  • 2. Aurora, S.
    et al.
    LeBelle, N.
    Schmitz, Monika
    Dufours, S.
    In vitro regulation by activinB and IGF-I of gonadotropin expression in European eel, Anguilla anguilla2007Conference paper (Refereed)
  • 3. Aurora, S.
    et al.
    Schmitz, Monika
    Weltzin, F.A.
    Baloche, S.
    LeBelle, N.
    Rousseau, K.
    Dufours, S.
    Differential expression of LHbeta and FSHbeta in European eel, Anguilla anguilla2006Conference paper (Refereed)
  • 4. Berglund, B.
    et al.
    Schmitz, Monika
    Lundqvist, H.
    Seawater adaptability in Baltic salmon (Salmo salar): a bimodal smoltification pattern in previously mature males1992Article in journal (Refereed)
  • 5.
    Bergman, Eva
    et al.
    Karlstad University, Faculty of Social and Life Sciences, Department of Biology.
    Greenberg, Larry
    Karlstad University, Faculty of Social and Life Sciences, Department of Biology.
    Piccolo, John
    Karlstad University, Faculty of Social and Life Sciences, Department of Biology.
    Norrgård, Johnny
    Karlstad University, Faculty of Social and Life Sciences, Department of Biology.
    Schmitz, Monika
    Karlstad University, Faculty of Social and Life Sciences, Department of Biology.
    Lax och öring i Klarälven: möjligheter för vild fisk och kvalité på utsatt fisk2009Report (Other academic)
  • 6.
    Bergman, Eva
    et al.
    Karlstad University, Faculty of Social and Life Sciences, Department of Biology.
    Piccolo, John
    Karlstad University, Faculty of Social and Life Sciences, Department of Biology.
    Norrgård, Johnny
    Karlstad University, Faculty of Social and Life Sciences, Department of Biology.
    Greenberg, Larry
    Karlstad University, Faculty of Social and Life Sciences, Department of Biology.
    Schmitz, Monika
    Karlstad University, Faculty of Social and Life Sciences, Department of Biology.
    Landlocked migrating salmonids in large regulated systems2010Conference paper (Refereed)
  • 7. Borg, B.
    et al.
    Bornestaf, C.
    Hellqvist, A.
    Schmitz, Monika
    Mayer, I.
    Mechanisms in the photoperiodic control of reproduction in the stickleback2004In: BehaviourArticle in journal (Refereed)
  • 8. Brännäs, E.
    et al.
    Lundqvist, H.
    Schmitz, Monika
    Brännäs, K.
    Prentice, E.
    Wiklund, B-S
    Application of a passive integrated transponder (PIT) fish identification and monitoring system to fish behavioural studies1994In: Trans. Am. Fish. SocArticle in journal (Refereed)
  • 9.
    Calles, Olle
    et al.
    Karlstad University, Faculty of Social and Life Sciences, Department of Biology.
    Greenberg, Larry
    Karlstad University, Faculty of Social and Life Sciences, Department of Biology.
    Schmitz, Monika
    Fisheries Research at Karlstad University2007Conference paper (Other (popular science, discussion, etc.))
  • 10.
    Calles, Olle
    et al.
    Karlstad University, Faculty of Social and Life Sciences, Department of Biology.
    Greenberg, Larry
    Karlstad University, Faculty of Social and Life Sciences, Department of Biology.
    Schmitz, Monika
    Bergman, Eva
    Karlstad University, Faculty of Social and Life Sciences, Department of Biology.
    Hultman, Jens
    Andersson, Jonas
    Smolt migration in the River Klarälven, the importance of food2006Conference paper (Refereed)
  • 11.
    Calles, Olle
    et al.
    Karlstad University, Faculty of Social and Life Sciences, Department of Biology.
    Olsson, Ivan
    Schmitz, Monika
    Greenberg, Larry
    Karlstad University, Faculty of Social and Life Sciences, Department of Biology.
    Karlsson, Simon
    Bergdahl, Daniel
    Ålens nedströms passage av vattenkraftverk: Årsrapport 1 för ålprojekt Ätran Hösten 20072007Report (Refereed)
  • 12.
    Calles, Olle
    et al.
    Karlstad University, Faculty of Social and Life Sciences, Department of Biology.
    Schmitz, Monika
    Karlstad University, Faculty of Social and Life Sciences, Department of Biology.
    Greenberg, Larry
    Karlstad University, Faculty of Social and Life Sciences, Department of Biology.
    Olsson, Ivan
    Karlstad University, Faculty of Social and Life Sciences, Department of Biology.
    Comoglio, C
    Kemp, P.S
    Blunden, L
    Size-dependent mortality of migratory silver eels at a hydropower plant, and implications for escapement to the sea2010In: Freshwater Biology, ISSN 0046-5070, E-ISSN 1365-2427, Vol. 55, no 10, p. 2167-2180Article in journal (Refereed)
  • 13. Carton, M.W.
    et al.
    Schmitz, Monika
    Cutts, C.J.
    Kelly, A.K.
    Hill, J.A.
    Brabazon, E.D.
    Adams, C.E.
    Byrnes, L.
    Expressed sequence tags in larval Arctic charr (Salvelinus alpinus)2003In: Fish Physiology and BiochemistryArticle in journal (Refereed)
  • 14. Dufour, S.
    et al.
    Huang, Y.-S.
    Rousseau, K.
    Sbaibi, M.
    LeBelle, N.
    Vidal, B.
    Marchelidon, J.
    Querat, B.
    Burzawa-Gérard, E.
    Chang, C.F.
    Schmitz, Monika
    Puberty in teleosts: New insights into the roles of peripheral signals in the stimulation of pituitary gonadotropin2000In: Reproductive Physiology of Fish,, 2000Chapter in book (Refereed)
  • 15. Dufour, S.
    et al.
    Rousseau, K.
    Sbaihi, M.
    LeBelle, N.
    Vidal, B.
    Marchelidon, J.
    Schmitz, Monika
    Multiple neuroendocrine regulation of growth hormone in the European eel, Anquilla anquilla)2001In: J. Taiwan Fish.ResArticle in journal (Refereed)
  • 16. Hellqvist, A.
    et al.
    Bornestaf, C.
    Borg, B.
    Schmitz, Monika
    Cloning and sequencing of FSH-b and LH-b subunits and changes in their expression during the reproductive cycle in the three-spined stickleback, Gasterosteus aculeatus2004Conference paper (Refereed)
  • 17. Hellqvist, A.
    et al.
    Bornestaf, C.
    Borg, B.
    Schmitz, Monika
    Cloning and sequencing of the FSH-b and LH b-subunit in the three-spined stickleback, Gasterosteus aculeatus, and effects of photoperiod and temperature on LH-b and FSH-b mRNA expression,2004In: Gen. Comp. EndocrinolArticle in journal (Refereed)
  • 18. Hellqvist, A.
    et al.
    Schmitz, Monika
    Borg, B.
    Effects of castration, androgen-treatment and aromatase-inhibitors on the expression of FSH-b and LH-b in the three-spined stickleback, Gasterosteus aculeatus : Feedback differences mediating the photoperiodic response?2008In: General and Comparative Endocrinology, Vol. 158Article in journal (Refereed)
  • 19. Hellqvist, A.
    et al.
    Schmitz, Monika
    Borg, B.
    Mayer, I.
    Seasonal changes in expression of LH-b and FSH-b in male and female three-spined stickleback, Gasterosteus aculeatus2005In: Gen. Comp. EndocrinolArticle in journal (Refereed)
  • 20. Hellqvist, A.
    et al.
    Schmitz, Monika
    Lindberg, C.
    Olsson, P.E.
    Borg, B.
    LH-b mRNA expression in nesting and post-breeding three-spined stickleback Gasterosteus aculeatus, and effects of castration on expression of LH-b and spiggin mRNA2003In: Fish Physiology and BiochemistryArticle in journal (Refereed)
  • 21. Huang, Y.-S.
    et al.
    Le Belle, N.
    Schmitz, Monika
    Chang, C.F.
    Vernier, P.
    Querat, B.
    Dufour, S.
    In vivo and in vitro effects of sex steroids on gonadotropin (GTHII) synthesis in the female European eel, Anguilla anguilla1998In: Trends in Comparative Endocrinology and Neurobiology, Annals of the New York Academy of SciencesArticle in journal (Refereed)
  • 22. Huang, Y-S.
    et al.
    Rousseau, C.
    Sbaihi, M.
    LeBelle, N.
    Schmitz, Monika
    Dufour, S.
    Cortisol selectively stimulates pituitary gonadotropin b-subunit in a primitive teleost, Anguilla anguilla1999In: EndocrinologyArticle in journal (Refereed)
  • 23. Huang, Y.S.
    et al.
    Schmitz, Monika
    Le Belle, N.
    Chang, C.F.
    Querat, B.
    Dufour, S.
    Androgens stimulate gonadotropin-II b subunit in eel pituitary cells in vitro1997In: Mol. Cell. EndocrinolArticle in journal (Refereed)
  • 24. Marchelidon, J.
    et al.
    Le Belle, N.
    Hardy, A.
    Vidal, B.
    Sbaibi, M.
    Schmitz, Monika
    Burzawa-Gérard, E.
    Dufour, S.
    Variations of anatomical and endocrine parameters in sedentary and downstream migrating female European eels (Anquilla anquilla): Application to the characterisation of the silver stage1999In: Bull. Fr. Pêche PiscicArticle in journal (Refereed)
  • 25. Marchelidon, J.
    et al.
    Schmitz, Monika
    Houdebine, L.M.
    Vidal, B.
    Le Belle, N.
    Dufour, S.
    Development of a radioimmunoassay for European eel growth hormone (GH) and application to the study of silvering and experimental fasting1996In: Gen. Comp. EndocrinolArticle in journal (Refereed)
  • 26. Maugars, G.
    et al.
    Mayer, I.
    Schmitz, Monika
    Changes in mRNA encoding Pituitary gonadotropins and gonadotropin receptors during early sexual maturation in Atlantic salmon male parr, Salmo salar2006Conference paper (Refereed)
  • 27. Maugars, G.
    et al.
    Schmitz, Monika
    Changes in expression profiles of genes related to sexual maturation during spermatogenesis in testes of early-maturing male Atlantic salmon parr, Salmo salar2008In: CYBIUM, International Journal of Ichthyology, Vol. 32(2)Article in journal (Refereed)
  • 28. Maugars, G.
    et al.
    Schmitz, Monika
    Changes in expression profiles of genes related to sexual maturation during spermatogenesis in testes of early-maturing male Atlantic salmon parr, Salmo salar2007Conference paper (Refereed)
  • 29. Maugars, G.
    et al.
    Schmitz, Monika
    Gene Expression Profiling during Spermatogenesis in Early Maturing Male Atlantic Salmon Parr Testes2008In: General and Comparative EndocrinologyArticle in journal (Refereed)
  • 30. Maugars, G.
    et al.
    Schmitz, Monika
    Gonadotropin and gonadotropin receptor expression during the onset of sexual maturation in early maturing Atlantic salmon male parr, Salmo salar2008In: Molecular Reproduction and Development, Vol. 75 (2)Article in journal (Refereed)
  • 31. Maugars, G.
    et al.
    Schmitz, Monika
    Molecular cloning and expression of gonadotropin receptors in Atlantic salmon, (Salmo salar L)2006In: General and Comparative EndocrinologyArticle in journal (Refereed)
  • 32. Mayer, I.
    et al.
    Lundqvist, H.
    Berglund, B.
    Schmitz, Monika
    Schultz, R.
    Borg, B.
    Seasonal endocrine changes in Baltic salmon, Salmo salar, immature parr and mature male parr. I. Plasma levels of five androgens, 17a-hydroxy-20b-dihydroprogesterone and of 17b-estradiol1990In: Can. J. ZoolArticle in journal (Refereed)
  • 33. Mayer, I.
    et al.
    Schmitz, Monika
    Borg, B.
    Schultz, R.
    Seasonal endocrine changes in male and female Arctic charr (Salvelinus alpinus). I. Plasma levels of three androgens, 17a-hydroxy-20b-dihydroprogesterone and of 17b-estradiol1992In: Can. J. ZoolArticle in journal (Refereed)
  • 34. Nilsson, J.
    et al.
    Gross, R., R.
    Schmitz, Monika
    A new species-specific nuclear DNA marker for identification of hybrids between Atlantic salmon, Salmo salar L., and brown trout, S. trutta L1996In: J. Fish BiologyArticle in journal (Refereed)
  • 35. Nilsson, J.
    et al.
    Schmitz, Monika
    Random Amplified Polymorphic DNA (RAPD) in Arctic char1995In: Nordic J. Freshw. ResArticle in journal (Refereed)
  • 36.
    Norrgård, Johnny
    et al.
    Karlstad University, Faculty of Social and Life Sciences, Department of Biology.
    Bergman, Eva
    Karlstad University, Faculty of Social and Life Sciences, Department of Biology.
    Schmitz, Monika
    Karlstad University, Faculty of Social and Life Sciences.
    Greenberg, Larry
    Karlstad University, Faculty of Social and Life Sciences, Department of Biology.
    Effects of feeding regimes and early maturation on migratory behaviour of landlocked hatchery-reared Atlantic salmon Salmo salar smolts2014In: Journal of Fish Biology, ISSN 0022-1112, E-ISSN 1095-8649, Vol. 85, no 4, p. 1060-1073Article in journal (Refereed)
    Abstract [en]

    The migratory behaviour of hatchery-reared landlocked Atlantic salmon Salmo salar raised under three different feeding regimes was monitored through the lower part of the River Klarälven, Sweden. The smolts were implanted with acoustic transmitters and released into the River Klarälven, 25 km upstream of the outlet in Lake Vänern. Early mature males, which had matured the previous autumn, were also tagged and released. To monitor migration of the fish, acoustic receivers were deployed along the migratory route. The proportion of S. salar that reached Lake Vänern was significantly greater for fish fed fat-reduced feed than for fish given rations with higher fat content, regardless of ration size. Fish from the early mature male group remained in the river to a greater extent than fish from the three feeding regimes. Smolt status (degree of silvering), as visually assessed, did not differ among the feeding regime groups, and moreover, fully-silvered fish, regardless of feeding regime, migrated faster and had a greater migration success than fish with less developed smolt characteristics. Also, successful migrants had a lower condition factor than unsuccessful ones. These results indicate that the migration success of hatchery-reared S. smolts released to the wild can be enhanced by relatively simple changes in feeding regimes and by matching stocking time with smolt development.

  • 37.
    Norrgård, Johnny R
    et al.
    Karlstad University, Faculty of Social and Life Sciences, Department of Biology.
    Greenberg, Larry A
    Karlstad University, Faculty of Social and Life Sciences, Department of Biology.
    Piccolo, John J
    Karlstad University, Faculty of Social and Life Sciences, Department of Biology.
    Schmitz, Monika
    Uppsala university.
    Bergman, Eva
    Karlstad University, Faculty of Social and Life Sciences, Department of Biology.
    Multiplicative loss of landlocked Atlantic salmon Salmo salar L. smolts during downstream migration through multiple dams2013In: Rivers Research and Applications: an international journal devoted to river research and management, ISSN 1535-1459, E-ISSN 1535-1467, Vol. 29, no 10, p. 1306-1317Article in journal (Refereed)
    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.

  • 38.
    Piccolo, John J
    et al.
    Karlstad University, Faculty of Social and Life Sciences, Department of Biology.
    Norrgård, Johnny R
    Karlstad University, Faculty of Social and Life Sciences, Department of Biology.
    Greenberg, Larry A
    Karlstad University, Faculty of Social and Life Sciences, Department of Biology.
    Schmitz, Monika
    Karlstad University, Faculty of Social and Life Sciences, Department of Biology.
    Bergman, Eva
    Karlstad University, Faculty of Social and Life Sciences, Department of Biology.
    Conservation of endemic landlocked salmonids in regulated rivers: a case-study from Lake Vänern, Sweden2012In: Fish and Fisheries, ISSN 1467-2960, E-ISSN 1467-2979, Vol. 13, no 4, p. 418-433Article in journal (Refereed)
    Abstract [en]

    Conservation of migratory salmonids requires understanding their ecology at multiple scales, combined with assessing anthropogenic impacts. We present a case-study from over 100 years of data for the endemic landlocked Atlantic salmon (Salmo salar, Salmonidae) and brown trout (Salmo trutta, Salmonidae) in Lake Vänern, Sweden. We use this case-study to develop life history-based research and monitoring priorities for migratory salmonids. In Vänern, small wild populations of salmon and trout remain only in the heavily regulated Rivers Klar (Klarälven) and Gullspång (Gullspångsälven), and commercial and sport fisheries are maintained by hatchery stocking. These populations represent some of the last remaining large-bodied (up to 20 kg) landlocked salmon stocks worldwide. We found that one of four stocks of wild fish has increased since 1996; the other three remain critically low. Hatchery return rates for three of four stocks appear stable at roughly 1% and annual fisheries catch is roughly 75 metric tons, with an estimated 7.5% of hatchery smolts being recruited to the fishery; this also appears relatively stable since 1990. Our analysis reveals much uncertainty in key data requirements, including both river return and fisheries catch rates, estimates of wild smolt production and survival, and hatchery breeding and genetics protocols. These uncertainties, coupled with a lack of information on their riverine and lacustrine ecology, preclude effective management of these unique populations. We conclude with a framework for a life history-based approach to research and monitoring for Vänern salmon and trout, which should be applicable for all endemic, migratory salmonid populations.

  • 39. Pradet-Balade, B.
    et al.
    Schmitz, Monika
    Salmon, C.
    Dufour, S.
    Querat, B.
    Down-regulation of TSH subunit mRNA levels by thyroid hormones in the European eel1997In: Gen. Comp. EndocrinolArticle in journal (Refereed)
  • 40. Pradet-Balade, B.
    et al.
    Schmitz, Monika
    Salmon, C.
    Dufour, S.
    Querat, B.
    T3 and T4 down-regulate TSH subunit mRNAs in a teleost, the European eel. Anguilla anguilla1998In: Trends in Comparative Endocrinology and Neurobiology, Annals of the New York Academy of SciencesArticle in journal (Refereed)
  • 41. Páll, M.K.
    et al.
    Hellqvist, A.
    Schmitz, Monika
    Olsson, P.E.
    Mayer, I.
    Borg, B.
    Plasma 11-ketotestosterone and testosterone levels, kidney size, glueing behaviour, kidney glue-protein-mRNA, LH-β-mRNA and FSH-β-mRNA expression in courting and in paternal male three-spined sticklebacks, Gasterosteus aculeatus2005In: J.Fish BiologyArticle in journal (Refereed)
  • 42. Rousseau, K.
    et al.
    Aroua, S.
    Schmitz, Monika
    Elie, P.
    Dufour, S.
    Neuroendocrinology of silvering: metamorphosis or puberty?2007Conference paper (Refereed)
  • 43. Rousseau, K.
    et al.
    LeBelle, N.
    Sbaihi, M.
    Huang, Y-S.
    Marchelidon, J.
    Schmitz, Monika
    Dufour, S.
    Thyroid hormones negatively regulate Growth Hormone (GH) in a primitive teleost, Anguilla anguilla2002In: J. EndocrinologyArticle in journal (Refereed)
  • 44. Schmitz, Monika
    Annual variations in rheotactic behaviour and seawater adaptability in landlocked Arctic charr (Salvelinus alpinus L.)1992In: Can. J. Fish. Aquat. SciArticle in journal (Refereed)
  • 45. Schmitz, Monika
    Differential effect of Insulin-like growth factor I on In vitro gonadotropin subunits expression in Atlantic salmon2004In: Fish Physiology and BiochemistryArticle in journal (Refereed)
  • 46.
    Schmitz, Monika
    Karlstad University, Faculty of Social and Life Sciences, Department of Biology.
    Early sexual maturation in Atlantic salmon male parr: the role of metabolic signals2009Conference paper (Refereed)
  • 47. Schmitz, Monika
    Endocrinology of Puberty in Salmonid Fish: Role of Metabolic Signals2006Conference paper (Refereed)
  • 48. Schmitz, Monika
    Könsmognad hos lax i odling och dess effekter på smoltkvalitet2007Conference paper (Refereed)
  • 49. Schmitz, Monika
    Seasonal changes in hypoosmoregulatory ability in landlocked and anadromous populations of Arctic charr (Salvelinus alpinus) and Atlantic salmon (Salmo salar)1995In: Env. Biol. Fishes,Article in journal (Refereed)
  • 50. Schmitz, Monika
    et al.
    Aroua, S.
    Vidal, B.
    Le Belle, N.
    Elie, P.
    Dufour, S.
    Differential regulation of Luteinizing Hormone and Follicle-Stimulating Hormone expression during ovarian development and under steroid feedback in the European Eel,2005In: NeuroendocrinologyArticle in journal (Refereed)
12 1 - 50 of 58
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