Disparate movement behavior and feeding ecology in sympatric ecotypes of Atlantic cod
Abstract Coexistence of ecotypes, genetically divergent population units, is a widespread phenomenon, potentially affecting ecosystem functioning and local food web stability. In coastal Skagerrak, Atlantic cod (Gadus morhua) occur as two such coexisting ecotypes. We applied a combination of acousti...
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ftdoajarticles:oai:doaj.org/article:0abebeb11e6c45f6a5a102411920ac38 2023-05-15T15:26:59+02:00 Disparate movement behavior and feeding ecology in sympatric ecotypes of Atlantic cod Martin Lykke Kristensen Esben Moland Olsen Even Moland Halvor Knutsen Peter Grønkjær Anders Koed Kristi Källo Kim Aarestrup 2021-08-01T00:00:00Z https://doi.org/10.1002/ece3.7939 https://doaj.org/article/0abebeb11e6c45f6a5a102411920ac38 EN eng Wiley https://doi.org/10.1002/ece3.7939 https://doaj.org/toc/2045-7758 2045-7758 doi:10.1002/ece3.7939 https://doaj.org/article/0abebeb11e6c45f6a5a102411920ac38 Ecology and Evolution, Vol 11, Iss 16, Pp 11477-11490 (2021) Atlantic cod behavior ecotypes stable isotopes telemetry trophic ecology Ecology QH540-549.5 article 2021 ftdoajarticles https://doi.org/10.1002/ece3.7939 2022-12-31T04:33:49Z Abstract Coexistence of ecotypes, genetically divergent population units, is a widespread phenomenon, potentially affecting ecosystem functioning and local food web stability. In coastal Skagerrak, Atlantic cod (Gadus morhua) occur as two such coexisting ecotypes. We applied a combination of acoustic telemetry, genotyping, and stable isotope analysis to 72 individuals to investigate movement ecology and food niche of putative local “Fjord” and putative oceanic “North Sea” ecotypes—thus named based on previous molecular studies. Genotyping and individual origin assignment suggested 41 individuals were Fjord and 31 were North Sea ecotypes. Both ecotypes were found throughout the fjord. Seven percent of Fjord ecotype individuals left the study system during the study while 42% of North Sea individuals left, potentially homing to natal spawning grounds. Home range sizes were similar for the two ecotypes but highly variable among individuals. Fjord ecotype cod had significantly higher δ13C and δ15N stable isotope values than North Sea ecotype cod, suggesting they exploited different food niches. The results suggest coexisting ecotypes may possess innate differences in feeding and movement ecologies and may thus fill different functional roles in marine ecosystems. This highlights the importance of conserving interconnected populations to ensure stable ecosystem functioning and food web structures. Article in Journal/Newspaper atlantic cod Gadus morhua Directory of Open Access Journals: DOAJ Articles Ecology and Evolution 11 16 11477 11490 |
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Open Polar |
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Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Atlantic cod behavior ecotypes stable isotopes telemetry trophic ecology Ecology QH540-549.5 |
spellingShingle |
Atlantic cod behavior ecotypes stable isotopes telemetry trophic ecology Ecology QH540-549.5 Martin Lykke Kristensen Esben Moland Olsen Even Moland Halvor Knutsen Peter Grønkjær Anders Koed Kristi Källo Kim Aarestrup Disparate movement behavior and feeding ecology in sympatric ecotypes of Atlantic cod |
topic_facet |
Atlantic cod behavior ecotypes stable isotopes telemetry trophic ecology Ecology QH540-549.5 |
description |
Abstract Coexistence of ecotypes, genetically divergent population units, is a widespread phenomenon, potentially affecting ecosystem functioning and local food web stability. In coastal Skagerrak, Atlantic cod (Gadus morhua) occur as two such coexisting ecotypes. We applied a combination of acoustic telemetry, genotyping, and stable isotope analysis to 72 individuals to investigate movement ecology and food niche of putative local “Fjord” and putative oceanic “North Sea” ecotypes—thus named based on previous molecular studies. Genotyping and individual origin assignment suggested 41 individuals were Fjord and 31 were North Sea ecotypes. Both ecotypes were found throughout the fjord. Seven percent of Fjord ecotype individuals left the study system during the study while 42% of North Sea individuals left, potentially homing to natal spawning grounds. Home range sizes were similar for the two ecotypes but highly variable among individuals. Fjord ecotype cod had significantly higher δ13C and δ15N stable isotope values than North Sea ecotype cod, suggesting they exploited different food niches. The results suggest coexisting ecotypes may possess innate differences in feeding and movement ecologies and may thus fill different functional roles in marine ecosystems. This highlights the importance of conserving interconnected populations to ensure stable ecosystem functioning and food web structures. |
format |
Article in Journal/Newspaper |
author |
Martin Lykke Kristensen Esben Moland Olsen Even Moland Halvor Knutsen Peter Grønkjær Anders Koed Kristi Källo Kim Aarestrup |
author_facet |
Martin Lykke Kristensen Esben Moland Olsen Even Moland Halvor Knutsen Peter Grønkjær Anders Koed Kristi Källo Kim Aarestrup |
author_sort |
Martin Lykke Kristensen |
title |
Disparate movement behavior and feeding ecology in sympatric ecotypes of Atlantic cod |
title_short |
Disparate movement behavior and feeding ecology in sympatric ecotypes of Atlantic cod |
title_full |
Disparate movement behavior and feeding ecology in sympatric ecotypes of Atlantic cod |
title_fullStr |
Disparate movement behavior and feeding ecology in sympatric ecotypes of Atlantic cod |
title_full_unstemmed |
Disparate movement behavior and feeding ecology in sympatric ecotypes of Atlantic cod |
title_sort |
disparate movement behavior and feeding ecology in sympatric ecotypes of atlantic cod |
publisher |
Wiley |
publishDate |
2021 |
url |
https://doi.org/10.1002/ece3.7939 https://doaj.org/article/0abebeb11e6c45f6a5a102411920ac38 |
genre |
atlantic cod Gadus morhua |
genre_facet |
atlantic cod Gadus morhua |
op_source |
Ecology and Evolution, Vol 11, Iss 16, Pp 11477-11490 (2021) |
op_relation |
https://doi.org/10.1002/ece3.7939 https://doaj.org/toc/2045-7758 2045-7758 doi:10.1002/ece3.7939 https://doaj.org/article/0abebeb11e6c45f6a5a102411920ac38 |
op_doi |
https://doi.org/10.1002/ece3.7939 |
container_title |
Ecology and Evolution |
container_volume |
11 |
container_issue |
16 |
container_start_page |
11477 |
op_container_end_page |
11490 |
_version_ |
1766357451923259392 |