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Do predator odours and warmer winters affect growth of salmonid embryos?
Karlstad University, Faculty of Health, Science and Technology (starting 2013), Department of Environmental and Life Sciences (from 2013).ORCID iD: 0000-0003-0762-6551
Karlstad University, Faculty of Health, Science and Technology (starting 2013), Department of Environmental and Life Sciences (from 2013).ORCID iD: 0000-0002-3813-9548
Karlstad University, Faculty of Health, Science and Technology (starting 2013), Department of Environmental and Life Sciences (from 2013).ORCID iD: 0000-0002-3191-7140
Karlstad University, Faculty of Health, Science and Technology (starting 2013), Department of Environmental and Life Sciences (from 2013).ORCID iD: 0000-0001-6758-5857
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2023 (English)In: Ecology of Freshwater Fish, ISSN 0906-6691, E-ISSN 1600-0633, no 1, article id e12747Article in journal (Refereed) Published
Abstract [en]

Conditions early in ontogeny can have considerable effects later on in life. Many salmonids spawn during the autumn, and temperature during subsequent embryogenesis may have far-reaching effects on life-history traits, especially when considering ongoing climate change. Even biotic conditions during embryogenesis, such as predation threat, may affect later life stages. Here, we examined how predator odours and increased temperatures affect embryonic growth and development of a fish (brown trout Salmo trutta). We found that embryos had lower body mass and greater yolk volume close to hatching when subjected to predator odours. Trout embryos incubated at temperatures representing natural winter conditions were larger than embryos incubated at higher temperatures, although the latter hatched earlier. Fry sizes at emergence did not differ between treatments, perhaps because of compensatory growth during spring. This study shows that predator presence can have similar effects on embryonic growth of salmonids as warming winters, with possible impact later in ontogeny. 

Place, publisher, year, edition, pages
John Wiley & Sons, 2023. no 1, article id e12747
Keywords [en]
brown trout, climate change, development, egg incubation, predation, yolk
National Category
Ecology Zoology Fish and Aquacultural Science
Research subject
Biology
Identifiers
URN: urn:nbn:se:kau:diva-96852DOI: 10.1111/eff.12747Scopus ID: 2-s2.0-85170696207OAI: oai:DiVA.org:kau-96852DiVA, id: diva2:1801651
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Karlstad UniversityAvailable from: 2023-10-02 Created: 2023-10-02 Last updated: 2023-12-11Bibliographically approved

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Filipsson, KarlErlandsson, AnnGreenberg, LarryÖsterling, MartinWatz, JohanBergman, Eva

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