Supplementary material from "Allee effects and the Allee-effect zone in a 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...
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ftdatacite:10.6084/m9.figshare.c.5767153.v1 2023-05-15T15:27:14+02:00 Supplementary material from "Allee effects and the Allee-effect zone in a northwest Atlantic cod" Perälä, Tommi Hutchings, Jeffrey A. Kuparinen, Anna 2021 https://dx.doi.org/10.6084/m9.figshare.c.5767153.v1 https://rs.figshare.com/collections/Supplementary_material_from_Allee_effects_and_the_Allee-effect_zone_in_a_northwest_Atlantic_cod_/5767153/1 unknown The Royal Society https://dx.doi.org/10.1098/rsbl.2021.0439 https://dx.doi.org/10.6084/m9.figshare.c.5767153 Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 CC-BY Ecology FOS Biological sciences article Collection 2021 ftdatacite https://doi.org/10.6084/m9.figshare.c.5767153.v1 https://doi.org/10.1098/rsbl.2021.0439 https://doi.org/10.6084/m9.figshare.c.5767153 2022-02-09T12:10:03Z 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 ) off Newfoundland despite 30 years of dramatically reduced fishing mortality and numerous fishery closures has not recovered suggesting that drivers other than fishing 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. Article in Journal/Newspaper atlantic cod Gadus morhua Newfoundland Northwest Atlantic DataCite Metadata Store (German National Library of Science and Technology) |
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DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
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topic |
Ecology FOS Biological sciences |
spellingShingle |
Ecology FOS Biological sciences Perälä, Tommi Hutchings, Jeffrey A. Kuparinen, Anna Supplementary material from "Allee effects and the Allee-effect zone in a northwest Atlantic cod" |
topic_facet |
Ecology FOS Biological sciences |
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 ) off Newfoundland despite 30 years of dramatically reduced fishing mortality and numerous fishery closures has not recovered suggesting that drivers other than fishing 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. |
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 |
Supplementary material from "Allee effects and the Allee-effect zone in a northwest Atlantic cod" |
title_short |
Supplementary material from "Allee effects and the Allee-effect zone in a northwest Atlantic cod" |
title_full |
Supplementary material from "Allee effects and the Allee-effect zone in a northwest Atlantic cod" |
title_fullStr |
Supplementary material from "Allee effects and the Allee-effect zone in a northwest Atlantic cod" |
title_full_unstemmed |
Supplementary material from "Allee effects and the Allee-effect zone in a northwest Atlantic cod" |
title_sort |
supplementary material from "allee effects and the allee-effect zone in a northwest atlantic cod" |
publisher |
The Royal Society |
publishDate |
2021 |
url |
https://dx.doi.org/10.6084/m9.figshare.c.5767153.v1 https://rs.figshare.com/collections/Supplementary_material_from_Allee_effects_and_the_Allee-effect_zone_in_a_northwest_Atlantic_cod_/5767153/1 |
genre |
atlantic cod Gadus morhua Newfoundland Northwest Atlantic |
genre_facet |
atlantic cod Gadus morhua Newfoundland Northwest Atlantic |
op_relation |
https://dx.doi.org/10.1098/rsbl.2021.0439 https://dx.doi.org/10.6084/m9.figshare.c.5767153 |
op_rights |
Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.6084/m9.figshare.c.5767153.v1 https://doi.org/10.1098/rsbl.2021.0439 https://doi.org/10.6084/m9.figshare.c.5767153 |
_version_ |
1766357675256315904 |