Community structure affects trophic ontogeny in a predatory fish

While most studies have focused on the timing and nature of ontogenetic niche shifts, information is scarce about the effects of community structure on trophic ontogeny of top predators. We investigated how community structure affects ontogenetic niche shifts (i.e., relationships between body length...

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Published in:Ecology and Evolution
Main Authors: Sánchez-Hernández, Javier, Eloranta, Antti, Finstad, Anders G., Amundsen, Per-Arne
Format: Article in Journal/Newspaper
Language:English
Published: John Wiley & Sons Ltd. 2017
Subjects:
Online Access:http://urn.fi/URN:NBN:fi:jyu-201701091103
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spelling ftjyvaeskylaenun:oai:jyx.jyu.fi:123456789/52801 2024-02-04T09:56:56+01:00 Community structure affects trophic ontogeny in a predatory fish Sánchez-Hernández, Javier Eloranta, Antti Finstad, Anders G. Amundsen, Per-Arne 2017 358–367 application/pdf http://urn.fi/URN:NBN:fi:jyu-201701091103 eng eng John Wiley & Sons Ltd. Ecology and Evolution 2045-7758 1 7 10.1002/ece3.2600 Sánchez-Hernández, J., Eloranta, A., Finstad, A. G., & Amundsen, P.-A. (2017). Community structure affects trophic ontogeny in a predatory fish. Ecology and Evolution , 7 (1), 358-367. https://doi.org/10.1002/ece3.2600 CONVID_26408286 TUTKAID_72232 URN:NBN:fi:jyu-201701091103 http://urn.fi/URN:NBN:fi:jyu-201701091103 © 2016 The Authors. Published by John Wiley & Sons Ltd. This is an open access article distributed under the terms of the Creative Commons Attribution License. openAccess https://creativecommons.org/licenses/by/4.0/ dietary switch fish assemblage individual specialization interindividual variation niche shift saalistus article http://purl.org/eprint/type/JournalArticle http://purl.org/coar/resource_type/c_2df8fbb1 publishedVersion A1 2017 ftjyvaeskylaenun 2024-01-11T00:04:19Z While most studies have focused on the timing and nature of ontogenetic niche shifts, information is scarce about the effects of community structure on trophic ontogeny of top predators. We investigated how community structure affects ontogenetic niche shifts (i.e., relationships between body length, trophic position, and individual dietary specialization) of a predatory fish, brown trout (Salmo trutta). We used stable isotope and stomach content analyses to test how functional characteristics of lake fish community compositions (competition and prey availability) modulate niche shifts in terms of (i) piscivorous behavior, (ii) trophic position, and (iii) individual dietary specialization. Northern Scandinavian freshwater fish communities were used as a study system, including nine subarctic lakes with contrasting fish community configurations: (i) trout-only systems, (ii) two-species systems (brown trout and Arctic charr [Salvelinus alpinus] coexisting), and (iii) three-species systems (brown trout, Arctic charr, and three-spined sticklebacks [Gasterosteus aculeatus] coexisting). We expected that the presence of profitable small prey (stickleback) and mixed competitor–prey fish species (charr) supports early piscivory and high individual dietary specialization among trout in multispecies communities, whereas minor ontogenetic shifts were expected in trout-only systems. From logistic regression models, the presence of a suitable prey fish species (stickleback) emerged as the principal variable determining the size at ontogenetic niche shifts. Generalized additive mixed models indicated that fish community structure shaped ontogenetic niche shifts in trout, with the strongest positive relationships between body length, trophic position, and individual dietary specialization being observed in three-species communities. Our findings revealed that the presence of a small-sized prey fish species (stickleback) rather than a mixed competitor–prey fish species (charr) was an important factor affecting the ontogenetic ... Article in Journal/Newspaper Arctic charr Arctic Salvelinus alpinus Subarctic JYX - Jyväskylä University Digital Archive Arctic Ecology and Evolution 7 1 358 367
institution Open Polar
collection JYX - Jyväskylä University Digital Archive
op_collection_id ftjyvaeskylaenun
language English
topic dietary switch
fish assemblage
individual specialization
interindividual variation
niche shift
saalistus
spellingShingle dietary switch
fish assemblage
individual specialization
interindividual variation
niche shift
saalistus
Sánchez-Hernández, Javier
Eloranta, Antti
Finstad, Anders G.
Amundsen, Per-Arne
Community structure affects trophic ontogeny in a predatory fish
topic_facet dietary switch
fish assemblage
individual specialization
interindividual variation
niche shift
saalistus
description While most studies have focused on the timing and nature of ontogenetic niche shifts, information is scarce about the effects of community structure on trophic ontogeny of top predators. We investigated how community structure affects ontogenetic niche shifts (i.e., relationships between body length, trophic position, and individual dietary specialization) of a predatory fish, brown trout (Salmo trutta). We used stable isotope and stomach content analyses to test how functional characteristics of lake fish community compositions (competition and prey availability) modulate niche shifts in terms of (i) piscivorous behavior, (ii) trophic position, and (iii) individual dietary specialization. Northern Scandinavian freshwater fish communities were used as a study system, including nine subarctic lakes with contrasting fish community configurations: (i) trout-only systems, (ii) two-species systems (brown trout and Arctic charr [Salvelinus alpinus] coexisting), and (iii) three-species systems (brown trout, Arctic charr, and three-spined sticklebacks [Gasterosteus aculeatus] coexisting). We expected that the presence of profitable small prey (stickleback) and mixed competitor–prey fish species (charr) supports early piscivory and high individual dietary specialization among trout in multispecies communities, whereas minor ontogenetic shifts were expected in trout-only systems. From logistic regression models, the presence of a suitable prey fish species (stickleback) emerged as the principal variable determining the size at ontogenetic niche shifts. Generalized additive mixed models indicated that fish community structure shaped ontogenetic niche shifts in trout, with the strongest positive relationships between body length, trophic position, and individual dietary specialization being observed in three-species communities. Our findings revealed that the presence of a small-sized prey fish species (stickleback) rather than a mixed competitor–prey fish species (charr) was an important factor affecting the ontogenetic ...
format Article in Journal/Newspaper
author Sánchez-Hernández, Javier
Eloranta, Antti
Finstad, Anders G.
Amundsen, Per-Arne
author_facet Sánchez-Hernández, Javier
Eloranta, Antti
Finstad, Anders G.
Amundsen, Per-Arne
author_sort Sánchez-Hernández, Javier
title Community structure affects trophic ontogeny in a predatory fish
title_short Community structure affects trophic ontogeny in a predatory fish
title_full Community structure affects trophic ontogeny in a predatory fish
title_fullStr Community structure affects trophic ontogeny in a predatory fish
title_full_unstemmed Community structure affects trophic ontogeny in a predatory fish
title_sort community structure affects trophic ontogeny in a predatory fish
publisher John Wiley & Sons Ltd.
publishDate 2017
url http://urn.fi/URN:NBN:fi:jyu-201701091103
geographic Arctic
geographic_facet Arctic
genre Arctic charr
Arctic
Salvelinus alpinus
Subarctic
genre_facet Arctic charr
Arctic
Salvelinus alpinus
Subarctic
op_relation Ecology and Evolution
2045-7758
1
7
10.1002/ece3.2600
Sánchez-Hernández, J., Eloranta, A., Finstad, A. G., & Amundsen, P.-A. (2017). Community structure affects trophic ontogeny in a predatory fish. Ecology and Evolution , 7 (1), 358-367. https://doi.org/10.1002/ece3.2600
CONVID_26408286
TUTKAID_72232
URN:NBN:fi:jyu-201701091103
http://urn.fi/URN:NBN:fi:jyu-201701091103
op_rights © 2016 The Authors. Published by John Wiley & Sons Ltd. This is an open access article distributed under the terms of the Creative Commons Attribution License.
openAccess
https://creativecommons.org/licenses/by/4.0/
container_title Ecology and Evolution
container_volume 7
container_issue 1
container_start_page 358
op_container_end_page 367
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