Reproductive ecology of the female pink cusk-eel (Genypterus blacodes): evaluating differences between fishery management zones in the Chilean austral zone

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dc.contributor.authorBaker, Laurie L.
dc.contributor.authorWiff, Rodrigo
dc.contributor.authorQuiroz, J. C.
dc.contributor.authorFlores, Andres
dc.contributor.authorCespedes, Renato
dc.contributor.authorBarrientos, Mauricio A.
dc.contributor.authorOjeda, Vilma
dc.contributor.authorGatica, Claudio
dc.date.accessioned2024-01-10T14:21:33Z
dc.date.available2024-01-10T14:21:33Z
dc.date.issued2014
dc.description.abstractThe 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.
dc.description.funderBritish Ecological Society (BES)
dc.description.funderInstituto de Investigacion Pesquera (INPESCA)
dc.description.funderCONICYT/FONDECYT
dc.fechaingreso.objetodigital2024-03-21
dc.format.extent11 páginas
dc.fuente.origenWOS
dc.identifier.doi10.1007/s10641-013-0199-2
dc.identifier.eissn1573-5133
dc.identifier.issn0378-1909
dc.identifier.urihttps://doi.org/10.1007/s10641-013-0199-2
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/79708
dc.identifier.wosidWOS:000341496600001
dc.information.autorucMatemática;Barrientos M;S/I;95198
dc.issue.numero10
dc.language.isoen
dc.nota.accesocontenido parcial
dc.pagina.final1093
dc.pagina.inicio1083
dc.publisherSPRINGER
dc.revistaENVIRONMENTAL BIOLOGY OF FISHES
dc.rightsacceso restringido
dc.subjectL-50%
dc.subjectGenypterus blacodes
dc.subjectFisheries
dc.subjectChile
dc.subjectReproduction
dc.subjectMaturity
dc.subjectNORTH-SEA PLAICE
dc.subjectCOD GADUS-MORHUA
dc.subjectPOPULATION-STRUCTURE
dc.subjectCOMMERCIAL CATCH
dc.subjectMATURITY OGIVES
dc.subjectSOUTHERN CHILE
dc.subjectREACTION NORMS
dc.subjectLIFE-HISTORY
dc.subjectMATURATION
dc.subjectGROWTH
dc.subject.ods15 Life on Land
dc.subject.ods14 Life Below Water
dc.subject.odspa15 Vida de ecosistemas terrestres
dc.subject.odspa14 Vida submarina
dc.titleReproductive ecology of the female pink cusk-eel (Genypterus blacodes): evaluating differences between fishery management zones in the Chilean austral zone
dc.typeartículo
dc.volumen97
sipa.codpersvinculados95198
sipa.indexWOS
sipa.indexScopus
sipa.trazabilidadCarga SIPA;09-01-2024
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