Reproductive ecology of the female pink cusk-eel (Genypterus blacodes): evaluating differences between fishery management zones in the Chilean austral zone
The pink cusk-eel (Genypterus blacodes), a benthic-demersal fish confined to the southern hemisphere, supports an important commercial fishery in Chile where it is exploited over an extensive geographic area. Although the fishery was originally divided into a northern (41A(0)28'aEuro"47A(0...
Published in: | Environmental Biology of Fishes |
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Format: | Article in Journal/Newspaper |
Language: | English |
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Online Access: | https://repositorio.uc.cl/handle/11534/79708 https://doi.org/10.1007/s10641-013-0199-2 |
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ftpunivcchile:oai:repositorio.uc.cl:11534/79708 2024-04-21T08:02:21+00:00 Reproductive ecology of the female pink cusk-eel (Genypterus blacodes): evaluating differences between fishery management zones in the Chilean austral zone Baker, Laurie L. Wiff, Rodrigo Quiroz, J. C. Flores, Andres Cespedes, Renato Barrientos, Mauricio A. Ojeda, Vilma Gatica, Claudio 2024-01-10T14:21:33Z 11 páginas application/pdf https://repositorio.uc.cl/handle/11534/79708 https://doi.org/10.1007/s10641-013-0199-2 en eng SPRINGER doi:10.1007/s10641-013-0199-2 1573-5133 0378-1909 https://doi.org/10.1007/s10641-013-0199-2 https://repositorio.uc.cl/handle/11534/79708 WOS:000341496600001 acceso restringido L-50% Genypterus blacodes Fisheries Chile Reproduction Maturity NORTH-SEA PLAICE COD GADUS-MORHUA POPULATION-STRUCTURE COMMERCIAL CATCH MATURITY OGIVES SOUTHERN CHILE REACTION NORMS LIFE-HISTORY MATURATION GROWTH 15 Life on Land 14 Life Below Water 15 Vida de ecosistemas terrestres 14 Vida submarina artículo 2024 ftpunivcchile https://doi.org/10.1007/s10641-013-0199-2 2024-03-27T15:26:48Z The pink cusk-eel (Genypterus blacodes), a benthic-demersal fish confined to the southern hemisphere, supports an important commercial fishery in Chile where it is exploited over an extensive geographic area. Although the fishery was originally divided into a northern (41A(0)28'aEuro"47A(0)00'S) and southern (47A(0)00'aEuro"57A(0)00'S) zone for the purposes of fisheries management, recent studies have reported significant differences in life history parameters between these zones. Individuals from the southern zone reached larger asymptotic sizes and possessed higher survival rates compared to the northern zone. We estimate and compare the gonadosomatic index (GSI), shape of the maturity ogive, and length at 50 % maturity (L (50%)) of female G. blacodes between management zones and across time using biological data collected from the industrial fleet between 1985 and 2009. Females in the northern zone had higher monthly mean GSI than females in the southern zone. Our analyses also revealed L (50%) to be significantly higher in the southern zone than in the northern zone from 1985 to 2009. The significant differences in life-history traits between fishery management zones agree with the trade-offs predicted by Charnov's life history theory. Together these results provide additional support for the hypothesis that two separate stocks exist and suggest that females from the northern zone have developed a life-history strategy, which favours early maturation and a proportionally greater investment in reproduction than females from the southern zone. British Ecological Society (BES) Instituto de Investigacion Pesquera (INPESCA) CONICYT/FONDECYT Article in Journal/Newspaper Gadus morhua Pontificia Universidad Católica de Chile: Repositorio UC Environmental Biology of Fishes 97 10 1083 1093 |
institution |
Open Polar |
collection |
Pontificia Universidad Católica de Chile: Repositorio UC |
op_collection_id |
ftpunivcchile |
language |
English |
topic |
L-50% Genypterus blacodes Fisheries Chile Reproduction Maturity NORTH-SEA PLAICE COD GADUS-MORHUA POPULATION-STRUCTURE COMMERCIAL CATCH MATURITY OGIVES SOUTHERN CHILE REACTION NORMS LIFE-HISTORY MATURATION GROWTH 15 Life on Land 14 Life Below Water 15 Vida de ecosistemas terrestres 14 Vida submarina |
spellingShingle |
L-50% Genypterus blacodes Fisheries Chile Reproduction Maturity NORTH-SEA PLAICE COD GADUS-MORHUA POPULATION-STRUCTURE COMMERCIAL CATCH MATURITY OGIVES SOUTHERN CHILE REACTION NORMS LIFE-HISTORY MATURATION GROWTH 15 Life on Land 14 Life Below Water 15 Vida de ecosistemas terrestres 14 Vida submarina Baker, Laurie L. Wiff, Rodrigo Quiroz, J. C. Flores, Andres Cespedes, Renato Barrientos, Mauricio A. Ojeda, Vilma Gatica, Claudio Reproductive ecology of the female pink cusk-eel (Genypterus blacodes): evaluating differences between fishery management zones in the Chilean austral zone |
topic_facet |
L-50% Genypterus blacodes Fisheries Chile Reproduction Maturity NORTH-SEA PLAICE COD GADUS-MORHUA POPULATION-STRUCTURE COMMERCIAL CATCH MATURITY OGIVES SOUTHERN CHILE REACTION NORMS LIFE-HISTORY MATURATION GROWTH 15 Life on Land 14 Life Below Water 15 Vida de ecosistemas terrestres 14 Vida submarina |
description |
The pink cusk-eel (Genypterus blacodes), a benthic-demersal fish confined to the southern hemisphere, supports an important commercial fishery in Chile where it is exploited over an extensive geographic area. Although the fishery was originally divided into a northern (41A(0)28'aEuro"47A(0)00'S) and southern (47A(0)00'aEuro"57A(0)00'S) zone for the purposes of fisheries management, recent studies have reported significant differences in life history parameters between these zones. Individuals from the southern zone reached larger asymptotic sizes and possessed higher survival rates compared to the northern zone. We estimate and compare the gonadosomatic index (GSI), shape of the maturity ogive, and length at 50 % maturity (L (50%)) of female G. blacodes between management zones and across time using biological data collected from the industrial fleet between 1985 and 2009. Females in the northern zone had higher monthly mean GSI than females in the southern zone. Our analyses also revealed L (50%) to be significantly higher in the southern zone than in the northern zone from 1985 to 2009. The significant differences in life-history traits between fishery management zones agree with the trade-offs predicted by Charnov's life history theory. Together these results provide additional support for the hypothesis that two separate stocks exist and suggest that females from the northern zone have developed a life-history strategy, which favours early maturation and a proportionally greater investment in reproduction than females from the southern zone. British Ecological Society (BES) Instituto de Investigacion Pesquera (INPESCA) CONICYT/FONDECYT |
format |
Article in Journal/Newspaper |
author |
Baker, Laurie L. Wiff, Rodrigo Quiroz, J. C. Flores, Andres Cespedes, Renato Barrientos, Mauricio A. Ojeda, Vilma Gatica, Claudio |
author_facet |
Baker, Laurie L. Wiff, Rodrigo Quiroz, J. C. Flores, Andres Cespedes, Renato Barrientos, Mauricio A. Ojeda, Vilma Gatica, Claudio |
author_sort |
Baker, Laurie L. |
title |
Reproductive ecology of the female pink cusk-eel (Genypterus blacodes): evaluating differences between fishery management zones in the Chilean austral zone |
title_short |
Reproductive ecology of the female pink cusk-eel (Genypterus blacodes): evaluating differences between fishery management zones in the Chilean austral zone |
title_full |
Reproductive ecology of the female pink cusk-eel (Genypterus blacodes): evaluating differences between fishery management zones in the Chilean austral zone |
title_fullStr |
Reproductive ecology of the female pink cusk-eel (Genypterus blacodes): evaluating differences between fishery management zones in the Chilean austral zone |
title_full_unstemmed |
Reproductive ecology of the female pink cusk-eel (Genypterus blacodes): evaluating differences between fishery management zones in the Chilean austral zone |
title_sort |
reproductive ecology of the female pink cusk-eel (genypterus blacodes): evaluating differences between fishery management zones in the chilean austral zone |
publisher |
SPRINGER |
publishDate |
2024 |
url |
https://repositorio.uc.cl/handle/11534/79708 https://doi.org/10.1007/s10641-013-0199-2 |
genre |
Gadus morhua |
genre_facet |
Gadus morhua |
op_relation |
doi:10.1007/s10641-013-0199-2 1573-5133 0378-1909 https://doi.org/10.1007/s10641-013-0199-2 https://repositorio.uc.cl/handle/11534/79708 WOS:000341496600001 |
op_rights |
acceso restringido |
op_doi |
https://doi.org/10.1007/s10641-013-0199-2 |
container_title |
Environmental Biology of Fishes |
container_volume |
97 |
container_issue |
10 |
container_start_page |
1083 |
op_container_end_page |
1093 |
_version_ |
1796942540831719424 |