Atlantic cod recovery from the Allee effect zone : contrasting ecological and evolutionary rescue
Kuparinen, A., & Uusi-Heikkilä, S. (2020). Atlantic cod recovery from the Allee effect zone : contrasting ecological and evolutionary rescue. Fish and Fisheries, 21(5), 916-926. https://doi.org/10.1111/faf.12470
Published inFish and Fisheries
© 2020 the Author(s)
The ability of a population to recover from disturbances is fundamental for its persistence. Impaired population recovery might be associated with a demographic Allee effect. Immigration from adjacent populations could accelerate the recovery not only by promoting population growth beyond the Allee effect threshold but also by bringing in advantageous genotypes. We explore the nature and role of ecological and evolutionary rescue in an Atlantic cod (Gadus morhua Gadidae) population fished below its Allee effect threshold. We utilize an eco-evolutionary model and simulate scenarios, where the target population evolves in response to selective fishing and sample immigrants from (a) a source population similarly adapted to fishing (post-fishing genotypes) or (b) an unexploited source population with natural genetic and phenotypic diversity (pre-fishing genotypes). Immigration of pre-fishing genotypes enhances the recovery due to the larger body sizes and the flow of associated genes. Post-fishing immigrants can also promote the population abundance recovery, but they increase uncertainty about recovery times as compared to pre-fishing immigrants and do not promote evolutionary recovery. Our results stress the importance of maintaining genetic and phenotypic diversity and suggest that marine protected areas can serve as an important source of immigrants to promote both the demographic and evolutionary recovery of exploited populations. ...
Dataset(s) related to the publicationhttps://doi.org/10.5061/dryad.dbrv15dx2
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Related funder(s)European Commission
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 fundingThis study was funded by the Academy of Finland (AK and SUH), European Research Council (COMPLEX-FISH 770884 to AK), Finnish Cultural Foundation (SUH) and the University of Jyväskylä (AK and SUH).
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