Vertical distribution of hake Merluccius hubbsi in spawning aggregations in North Patagonian waters of the Southwest Atlantic

Autores
Ehrlich, Martín David; Macchi, Gustavo Javier; Madirolas, Adrian Osvaldo; Machinandiarena, Laura
Año de publicación
2013
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
During hydroacoustic surveys for the Argentine hake (Merluccius hubbsi) stock assessments carried out in December 1996, 1998 and 2000 in the main spawning area, a bottom and mid water trawl daylight and darkness sequence per year was selected to study vertical migration. Dense pelagic layers were observed during day and night in the echograms and sometimes a fish layer remained on the bottom at night. During daylight, hake were concentrated mainly near the bottom. The size frequency distributions of males and females differed significantly among the three surveys. Male dominance was observed in 1998 and 2000 surveys. Lack of actively spawning females at midwater levels during darkness may be partly due to reproductive courtship in which females could abandon the shoals during egg fertilization. In the 1996 survey, females dominated both evening and night, before spawning. Just before spawning, sex ratio became similar. Spawning might occur early in the morning because actively spawning females had hydrated oocytes or recent post ovulatory follicles and males were dominant. Also, high densities of recently fertilized eggs were observed early in the morning during the three surveys.
Fil: Ehrlich, Martín David. Instituto Nacional de Investigaciones y Desarrollo Pesquero; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Ecología, Genética y Evolución; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Macchi, Gustavo Javier. Instituto Nacional de Investigaciones y Desarrollo Pesquero; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Madirolas, Adrian Osvaldo Madirolas. Instituto Nacional de Investigaciones y Desarrollo Pesquero; Argentina
Fil: Machinandiarena, Laura. Instituto Nacional de Investigaciones y Desarrollo Pesquero; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Ecología, Genética y Evolución; Argentina
Materia
Merluccius Hubbsi
Hake
Vertical Migration
Spawning Behavior
Reproduction
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/26135
Acceder
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network_name_str CONICET Digital (CONICET)
spelling Vertical distribution of hake Merluccius hubbsi in spawning aggregations in North Patagonian waters of the Southwest AtlanticEhrlich, Martín DavidMacchi, Gustavo JavierMadirolas, Adrian OsvaldoMachinandiarena, LauraMerluccius HubbsiHakeVertical MigrationSpawning BehaviorReproductionhttps://purl.org/becyt/ford/1.6https://purl.org/becyt/ford/1During hydroacoustic surveys for the Argentine hake (Merluccius hubbsi) stock assessments carried out in December 1996, 1998 and 2000 in the main spawning area, a bottom and mid water trawl daylight and darkness sequence per year was selected to study vertical migration. Dense pelagic layers were observed during day and night in the echograms and sometimes a fish layer remained on the bottom at night. During daylight, hake were concentrated mainly near the bottom. The size frequency distributions of males and females differed significantly among the three surveys. Male dominance was observed in 1998 and 2000 surveys. Lack of actively spawning females at midwater levels during darkness may be partly due to reproductive courtship in which females could abandon the shoals during egg fertilization. In the 1996 survey, females dominated both evening and night, before spawning. Just before spawning, sex ratio became similar. Spawning might occur early in the morning because actively spawning females had hydrated oocytes or recent post ovulatory follicles and males were dominant. Also, high densities of recently fertilized eggs were observed early in the morning during the three surveys.Fil: Ehrlich, Martín David. Instituto Nacional de Investigaciones y Desarrollo Pesquero; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Ecología, Genética y Evolución; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Macchi, Gustavo Javier. Instituto Nacional de Investigaciones y Desarrollo Pesquero; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Madirolas, Adrian Osvaldo Madirolas. Instituto Nacional de Investigaciones y Desarrollo Pesquero; ArgentinaFil: Machinandiarena, Laura. Instituto Nacional de Investigaciones y Desarrollo Pesquero; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Ecología, Genética y Evolución; ArgentinaElsevier Science2013-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/26135Ehrlich, Martín David; Macchi, Gustavo Javier; Madirolas, Adrian Osvaldo; Machinandiarena, Laura; Vertical distribution of hake Merluccius hubbsi in spawning aggregations in North Patagonian waters of the Southwest Atlantic; Elsevier Science; Fisheries Research; 138; 1-2013; 89-980165-7836CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.fishres.2012.07.007info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0165783612002135info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-10T13:08:48Zoai:ri.conicet.gov.ar:11336/26135instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-10 13:08:49.113CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Vertical distribution of hake Merluccius hubbsi in spawning aggregations in North Patagonian waters of the Southwest Atlantic
title Vertical distribution of hake Merluccius hubbsi in spawning aggregations in North Patagonian waters of the Southwest Atlantic
spellingShingle Vertical distribution of hake Merluccius hubbsi in spawning aggregations in North Patagonian waters of the Southwest Atlantic
Ehrlich, Martín David
Merluccius Hubbsi
Hake
Vertical Migration
Spawning Behavior
Reproduction
title_short Vertical distribution of hake Merluccius hubbsi in spawning aggregations in North Patagonian waters of the Southwest Atlantic
title_full Vertical distribution of hake Merluccius hubbsi in spawning aggregations in North Patagonian waters of the Southwest Atlantic
title_fullStr Vertical distribution of hake Merluccius hubbsi in spawning aggregations in North Patagonian waters of the Southwest Atlantic
title_full_unstemmed Vertical distribution of hake Merluccius hubbsi in spawning aggregations in North Patagonian waters of the Southwest Atlantic
title_sort Vertical distribution of hake Merluccius hubbsi in spawning aggregations in North Patagonian waters of the Southwest Atlantic
dc.creator.none.fl_str_mv Ehrlich, Martín David
Macchi, Gustavo Javier
Madirolas, Adrian Osvaldo
Machinandiarena, Laura
author Ehrlich, Martín David
author_facet Ehrlich, Martín David
Macchi, Gustavo Javier
Madirolas, Adrian Osvaldo
Machinandiarena, Laura
author_role author
author2 Macchi, Gustavo Javier
Madirolas, Adrian Osvaldo
Machinandiarena, Laura
author2_role author
author
author
dc.subject.none.fl_str_mv Merluccius Hubbsi
Hake
Vertical Migration
Spawning Behavior
Reproduction
topic Merluccius Hubbsi
Hake
Vertical Migration
Spawning Behavior
Reproduction
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.6
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv During hydroacoustic surveys for the Argentine hake (Merluccius hubbsi) stock assessments carried out in December 1996, 1998 and 2000 in the main spawning area, a bottom and mid water trawl daylight and darkness sequence per year was selected to study vertical migration. Dense pelagic layers were observed during day and night in the echograms and sometimes a fish layer remained on the bottom at night. During daylight, hake were concentrated mainly near the bottom. The size frequency distributions of males and females differed significantly among the three surveys. Male dominance was observed in 1998 and 2000 surveys. Lack of actively spawning females at midwater levels during darkness may be partly due to reproductive courtship in which females could abandon the shoals during egg fertilization. In the 1996 survey, females dominated both evening and night, before spawning. Just before spawning, sex ratio became similar. Spawning might occur early in the morning because actively spawning females had hydrated oocytes or recent post ovulatory follicles and males were dominant. Also, high densities of recently fertilized eggs were observed early in the morning during the three surveys.
Fil: Ehrlich, Martín David. Instituto Nacional de Investigaciones y Desarrollo Pesquero; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Ecología, Genética y Evolución; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Macchi, Gustavo Javier. Instituto Nacional de Investigaciones y Desarrollo Pesquero; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Madirolas, Adrian Osvaldo Madirolas. Instituto Nacional de Investigaciones y Desarrollo Pesquero; Argentina
Fil: Machinandiarena, Laura. Instituto Nacional de Investigaciones y Desarrollo Pesquero; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Ecología, Genética y Evolución; Argentina
description During hydroacoustic surveys for the Argentine hake (Merluccius hubbsi) stock assessments carried out in December 1996, 1998 and 2000 in the main spawning area, a bottom and mid water trawl daylight and darkness sequence per year was selected to study vertical migration. Dense pelagic layers were observed during day and night in the echograms and sometimes a fish layer remained on the bottom at night. During daylight, hake were concentrated mainly near the bottom. The size frequency distributions of males and females differed significantly among the three surveys. Male dominance was observed in 1998 and 2000 surveys. Lack of actively spawning females at midwater levels during darkness may be partly due to reproductive courtship in which females could abandon the shoals during egg fertilization. In the 1996 survey, females dominated both evening and night, before spawning. Just before spawning, sex ratio became similar. Spawning might occur early in the morning because actively spawning females had hydrated oocytes or recent post ovulatory follicles and males were dominant. Also, high densities of recently fertilized eggs were observed early in the morning during the three surveys.
publishDate 2013
dc.date.none.fl_str_mv 2013-01
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/26135
Ehrlich, Martín David; Macchi, Gustavo Javier; Madirolas, Adrian Osvaldo; Machinandiarena, Laura; Vertical distribution of hake Merluccius hubbsi in spawning aggregations in North Patagonian waters of the Southwest Atlantic; Elsevier Science; Fisheries Research; 138; 1-2013; 89-98
0165-7836
CONICET Digital
CONICET
url http://hdl.handle.net/11336/26135
identifier_str_mv Ehrlich, Martín David; Macchi, Gustavo Javier; Madirolas, Adrian Osvaldo; Machinandiarena, Laura; Vertical distribution of hake Merluccius hubbsi in spawning aggregations in North Patagonian waters of the Southwest Atlantic; Elsevier Science; Fisheries Research; 138; 1-2013; 89-98
0165-7836
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1016/j.fishres.2012.07.007
info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0165783612002135
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv Elsevier Science
publisher.none.fl_str_mv Elsevier Science
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 12.993085

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