Atlantic cod individual spatial behaviour and stable isotope associations in a no‐take marine reserve
Monk, C. T., Power, M., Freitas, C., Harrison, P. M., Heupel, M., Kuparinen, A., Moland, E., Simpfendorfer, C., Villegas‐Ríos, D., & Olsen, E. M. (2023). Atlantic cod individual spatial behaviour and stable isotope associations in a no‐take marine reserve. Journal of Animal Ecology, 92(12), 2333-2347. https://doi.org/10.1111/1365-2656.14014
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Journal of Animal EcologyAuthors
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2023Copyright
© 2023 The Authors. Journal of Animal Ecology published by John Wiley & Sons Ltd on behalf of British Ecological Society.
1. Foraging is a behavioural process and, therefore, individual behaviour and diet are theorized to covary. However, few comparisons of individual behaviour type and diet exist in the wild.
2. We tested whether behaviour type and diet covary in a protected population of Atlantic cod, Gadus morhua.
3. Working in a no-take marine reserve, we could collect data on natural behavioural variation and diet choice with minimal anthropogenic disturbance. We inferred behaviour using acoustic telemetry and diet from stable isotope compositions (expressed as δ13C and δ15N values). We further investigated whether behaviour and diet could have survival costs.
4. We found cod with shorter diel vertical migration distances fed at higher trophic levels. Cod δ13C and δ15N values scaled positively with body size. Neither behaviour nor diet predicted survival, indicating phenotypic diversity is maintained without survival costs for cod in a protected ecosystem.
5. The links between diet and diel vertical migration highlight that future work is needed to understand whether the shifts in this behaviour during environmental change (e.g. fishing or climate), could lead to trophic cascades.
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https://converis.jyu.fi/converis/portal/detail/Publication/193509551
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Research Council of Finland; European CommissionFunding program(s)
Academy Project, AoF; ERC Consolidator Grant
The content of the publication reflects only the author’s view. The funder is not responsible for any use that may be made of the information it contains.
Additional information about funding
This study was supported by a grant awarded by the Research Council of Norway: CODSIZE 294926 and an NSERC Discovery Grant to MP for stable isotope analyses. Long-term maintenance of the Tvedestrand Fjord telemetry array is funded by the Norwegian Institute of Marine Research (IMR) through the Coastal Ecosystems Research Program. DVR has received funding from the Spanish Ministry of Science and Innovation through the Ramón y Cajal Program (grant number RYC2021-032594-I). This project has received funding through the Academy of Finland (grant 317495 to AK). This project also has received funding from the European Research Council (ERC) under the European Union's H2020 Research and Innovation programme (grant agreement No 770884). ...License
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