Allee effects and the Allee-effect zone in northwest Atlantic cod
According to the theory of compensatory dynamics, depleted populations should recover when the threat responsible for their decline is removed because per capita population growth is assumed to be highest when populations are at their smallest viable sizes. Yet, many seriously depleted fish populati...
Main Authors: | , , |
---|---|
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
The Royal Society
2022
|
Subjects: | |
Online Access: | http://urn.fi/URN:NBN:fi:jyu-202202081424 |
id |
ftjyvaeskylaenun:oai:jyx.jyu.fi:123456789/79670 |
---|---|
record_format |
openpolar |
spelling |
ftjyvaeskylaenun:oai:jyx.jyu.fi:123456789/79670 2024-05-19T07:37:06+00:00 Allee effects and the Allee-effect zone in northwest Atlantic cod Perälä, Tommi Hutchings, Jeffrey A. Kuparinen, Anna 2022 application/pdf fulltext http://urn.fi/URN:NBN:fi:jyu-202202081424 eng eng The Royal Society Biology Letters 1744-9561 2 18 770884 info:eu-repo/grantAgreement/EC/H2020/770884/EU//COMPLEX-FISH 10.1098/rsbl.2021.0439 European Commission Euroopan komissio Perälä, T., Hutchings, J. A., & Kuparinen, A. (2022). Allee effects and the Allee-effect zone in northwest Atlantic cod. Biology Letters , 18 (2), Article 20210439. https://doi.org/10.1098/rsbl.2021.0439 CONVID_104120494 URN:NBN:fi:jyu-202202081424 http://urn.fi/URN:NBN:fi:jyu-202202081424 CC BY 4.0 © 2022 the Authors openAccess https://creativecommons.org/licenses/by/4.0/ Gadus morhua compensation depensation low-abundance dynamics marine conservation stock–recruitment relationship liikakalastus populaatiodynamiikka turska palautuminen kalakannat article http://purl.org/eprint/type/JournalArticle http://purl.org/coar/resource_type/c_2df8fbb1 publishedVersion A1 2022 ftjyvaeskylaenun 2024-04-23T23:38:28Z According to the theory of compensatory dynamics, depleted populations should recover when the threat responsible for their decline is removed because per capita population growth is assumed to be highest when populations are at their smallest viable sizes. Yet, many seriously depleted fish populations have failed to recover despite threat mitigation. Atlantic cod (Gadus morhua) stocks off Newfoundland, despite 30 years of dramatically reduced fishing mortality and numerous fishery closures, have not recovered, suggesting that drivers other than fishing can regulate the growth of collapsed fish populations, inhibiting or preventing their recovery. Here, using Bayesian inference, we show strong evidence of Allee effects in a south Newfoundland cod population, based on data on recruitment and spawning stock biomass. We infer the Allee-effect threshold, below which recovery is impaired. We demonstrate the necessity of data at low population sizes to make inferences about the nature of low-abundance dynamics. Our work indicates that Allee effects are not negligible in commercially exploited fish populations, as commonly projected, and that they represent an inhibitory force that can effectively prevent recovery from overfishing. Our findings contrast with prevailing fisheries management practices that assume compensatory dynamics at low abundances with potential to seriously overestimate the recovery potential of collapsed populations. peerReviewed Article in Journal/Newspaper atlantic cod Gadus morhua Newfoundland Northwest Atlantic JYX - Jyväskylä University Digital Archive |
institution |
Open Polar |
collection |
JYX - Jyväskylä University Digital Archive |
op_collection_id |
ftjyvaeskylaenun |
language |
English |
topic |
Gadus morhua compensation depensation low-abundance dynamics marine conservation stock–recruitment relationship liikakalastus populaatiodynamiikka turska palautuminen kalakannat |
spellingShingle |
Gadus morhua compensation depensation low-abundance dynamics marine conservation stock–recruitment relationship liikakalastus populaatiodynamiikka turska palautuminen kalakannat Perälä, Tommi Hutchings, Jeffrey A. Kuparinen, Anna Allee effects and the Allee-effect zone in northwest Atlantic cod |
topic_facet |
Gadus morhua compensation depensation low-abundance dynamics marine conservation stock–recruitment relationship liikakalastus populaatiodynamiikka turska palautuminen kalakannat |
description |
According to the theory of compensatory dynamics, depleted populations should recover when the threat responsible for their decline is removed because per capita population growth is assumed to be highest when populations are at their smallest viable sizes. Yet, many seriously depleted fish populations have failed to recover despite threat mitigation. Atlantic cod (Gadus morhua) stocks off Newfoundland, despite 30 years of dramatically reduced fishing mortality and numerous fishery closures, have not recovered, suggesting that drivers other than fishing can regulate the growth of collapsed fish populations, inhibiting or preventing their recovery. Here, using Bayesian inference, we show strong evidence of Allee effects in a south Newfoundland cod population, based on data on recruitment and spawning stock biomass. We infer the Allee-effect threshold, below which recovery is impaired. We demonstrate the necessity of data at low population sizes to make inferences about the nature of low-abundance dynamics. Our work indicates that Allee effects are not negligible in commercially exploited fish populations, as commonly projected, and that they represent an inhibitory force that can effectively prevent recovery from overfishing. Our findings contrast with prevailing fisheries management practices that assume compensatory dynamics at low abundances with potential to seriously overestimate the recovery potential of collapsed populations. peerReviewed |
format |
Article in Journal/Newspaper |
author |
Perälä, Tommi Hutchings, Jeffrey A. Kuparinen, Anna |
author_facet |
Perälä, Tommi Hutchings, Jeffrey A. Kuparinen, Anna |
author_sort |
Perälä, Tommi |
title |
Allee effects and the Allee-effect zone in northwest Atlantic cod |
title_short |
Allee effects and the Allee-effect zone in northwest Atlantic cod |
title_full |
Allee effects and the Allee-effect zone in northwest Atlantic cod |
title_fullStr |
Allee effects and the Allee-effect zone in northwest Atlantic cod |
title_full_unstemmed |
Allee effects and the Allee-effect zone in northwest Atlantic cod |
title_sort |
allee effects and the allee-effect zone in northwest atlantic cod |
publisher |
The Royal Society |
publishDate |
2022 |
url |
http://urn.fi/URN:NBN:fi:jyu-202202081424 |
genre |
atlantic cod Gadus morhua Newfoundland Northwest Atlantic |
genre_facet |
atlantic cod Gadus morhua Newfoundland Northwest Atlantic |
op_relation |
Biology Letters 1744-9561 2 18 770884 info:eu-repo/grantAgreement/EC/H2020/770884/EU//COMPLEX-FISH 10.1098/rsbl.2021.0439 European Commission Euroopan komissio Perälä, T., Hutchings, J. A., & Kuparinen, A. (2022). Allee effects and the Allee-effect zone in northwest Atlantic cod. Biology Letters , 18 (2), Article 20210439. https://doi.org/10.1098/rsbl.2021.0439 CONVID_104120494 URN:NBN:fi:jyu-202202081424 http://urn.fi/URN:NBN:fi:jyu-202202081424 |
op_rights |
CC BY 4.0 © 2022 the Authors openAccess https://creativecommons.org/licenses/by/4.0/ |
_version_ |
1799476345513705472 |