Opposing trends in survival and recruitment slow the recovery of a historically overexploited fishery
Quantifying temporal variation in demographic rates is a central goal of population ecology. In this study, we analyzed a multidecadal age-structured time series of Arctic char (Salvelinus alpinus) abundance in Lake Mývatn, Iceland, to infer the time-varying demographic response of the population to...
Published in: | Canadian Journal of Fisheries and Aquatic Sciences |
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Language: | English |
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2022
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Online Access: | http://dx.doi.org/10.1139/cjfas-2021-0161 https://cdnsciencepub.com/doi/full-xml/10.1139/cjfas-2021-0161 https://cdnsciencepub.com/doi/pdf/10.1139/cjfas-2021-0161 |
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crcansciencepubl:10.1139/cjfas-2021-0161 2024-05-12T08:00:03+00:00 Opposing trends in survival and recruitment slow the recovery of a historically overexploited fishery Phillips, Joseph S. Guðbergsson, Guðni Ives, Anthony R. 2022 http://dx.doi.org/10.1139/cjfas-2021-0161 https://cdnsciencepub.com/doi/full-xml/10.1139/cjfas-2021-0161 https://cdnsciencepub.com/doi/pdf/10.1139/cjfas-2021-0161 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Fisheries and Aquatic Sciences volume 79, issue 7, page 1138-1144 ISSN 0706-652X 1205-7533 Aquatic Science Ecology, Evolution, Behavior and Systematics journal-article 2022 crcansciencepubl https://doi.org/10.1139/cjfas-2021-0161 2024-04-18T06:54:52Z Quantifying temporal variation in demographic rates is a central goal of population ecology. In this study, we analyzed a multidecadal age-structured time series of Arctic char (Salvelinus alpinus) abundance in Lake Mývatn, Iceland, to infer the time-varying demographic response of the population to reduced harvest in the wake of the fishery’s collapse. Our analysis shows that while survival probability of adults increased following the alleviation of harvesting pressure, per capita recruitment consistently declined over most of the study period, until the final three years when it began to increase. The countervailing demographic trends resulted in only limited directional change in the total population size and population growth rate. Rather, the population dynamics were dominated by large interannual variability and a shift towards an older age distribution. Our results are indicative of a slow recovery of the population after its collapse, despite the rising number of adults following relaxed harvest. This underscores the potential for heterogeneous demographic responses to management efforts due to the complex ecological context in which such efforts take place. Article in Journal/Newspaper Arctic Iceland Mývatn Salvelinus alpinus Canadian Science Publishing Arctic Mývatn ENVELOPE(-16.985,-16.985,65.600,65.600) Canadian Journal of Fisheries and Aquatic Sciences |
institution |
Open Polar |
collection |
Canadian Science Publishing |
op_collection_id |
crcansciencepubl |
language |
English |
topic |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
spellingShingle |
Aquatic Science Ecology, Evolution, Behavior and Systematics Phillips, Joseph S. Guðbergsson, Guðni Ives, Anthony R. Opposing trends in survival and recruitment slow the recovery of a historically overexploited fishery |
topic_facet |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
description |
Quantifying temporal variation in demographic rates is a central goal of population ecology. In this study, we analyzed a multidecadal age-structured time series of Arctic char (Salvelinus alpinus) abundance in Lake Mývatn, Iceland, to infer the time-varying demographic response of the population to reduced harvest in the wake of the fishery’s collapse. Our analysis shows that while survival probability of adults increased following the alleviation of harvesting pressure, per capita recruitment consistently declined over most of the study period, until the final three years when it began to increase. The countervailing demographic trends resulted in only limited directional change in the total population size and population growth rate. Rather, the population dynamics were dominated by large interannual variability and a shift towards an older age distribution. Our results are indicative of a slow recovery of the population after its collapse, despite the rising number of adults following relaxed harvest. This underscores the potential for heterogeneous demographic responses to management efforts due to the complex ecological context in which such efforts take place. |
format |
Article in Journal/Newspaper |
author |
Phillips, Joseph S. Guðbergsson, Guðni Ives, Anthony R. |
author_facet |
Phillips, Joseph S. Guðbergsson, Guðni Ives, Anthony R. |
author_sort |
Phillips, Joseph S. |
title |
Opposing trends in survival and recruitment slow the recovery of a historically overexploited fishery |
title_short |
Opposing trends in survival and recruitment slow the recovery of a historically overexploited fishery |
title_full |
Opposing trends in survival and recruitment slow the recovery of a historically overexploited fishery |
title_fullStr |
Opposing trends in survival and recruitment slow the recovery of a historically overexploited fishery |
title_full_unstemmed |
Opposing trends in survival and recruitment slow the recovery of a historically overexploited fishery |
title_sort |
opposing trends in survival and recruitment slow the recovery of a historically overexploited fishery |
publisher |
Canadian Science Publishing |
publishDate |
2022 |
url |
http://dx.doi.org/10.1139/cjfas-2021-0161 https://cdnsciencepub.com/doi/full-xml/10.1139/cjfas-2021-0161 https://cdnsciencepub.com/doi/pdf/10.1139/cjfas-2021-0161 |
long_lat |
ENVELOPE(-16.985,-16.985,65.600,65.600) |
geographic |
Arctic Mývatn |
geographic_facet |
Arctic Mývatn |
genre |
Arctic Iceland Mývatn Salvelinus alpinus |
genre_facet |
Arctic Iceland Mývatn Salvelinus alpinus |
op_source |
Canadian Journal of Fisheries and Aquatic Sciences volume 79, issue 7, page 1138-1144 ISSN 0706-652X 1205-7533 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/cjfas-2021-0161 |
container_title |
Canadian Journal of Fisheries and Aquatic Sciences |
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1798841737634906112 |