First-feeding of hake (Merluccius hubbsi) larvae and prey availability in the North Patagonian spawning area

Autores
Viñas, Maria Delia; Santos, Betina
Año de publicación
2000
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The diet of Merluccius hubbsi first-feeding larvae was analysed and related to food availability in stratified waters of the Patagonian spawning area. The gut contents of small larvae ranging from 2 to 4 mm SL, collected from five consecutive depth strata (upper 50 m of the water column), were examined. After dissection of the larvae, the prey items were stained with tolouidine blue. The feeding incidence, and the types, sizes and numbers of food particles per larvae were determined. The mean feeding incidence was 64.5 %. Food particles 45 to 136 μm in width constituted the bulk of the prey ingested, which consisted of nauplii and early copepodites of the small copepod species frequently found in the sampling area. The most abundant taxa among the gut contents were Paracalanus parvus. Oithona spp.. Acartia tonsa and members of Pseudocalanidae. The mean number of nauplii per larva was 4.4 times higher than the number of copepodites, but the volumetric ratio between the two groups was 1.4:1. The results of larval gut analysis were related to zooplankton distribution in the field. First-feeding strategies of hake and anchovy larvae growing in the area were compared.
Fil: Viñas, Maria Delia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Mar del Plata. Instituto de Investigaciones Marinas y Costeras. Subsede Instituto Nacional de Investigación y Desarrollo Pesquero; Argentina
Fil: Santos, Betina. Instituto Nacional de Investigaciones y Desarrollo Pesquero; Argentina
Materia
Merluccius Hubbsi
First Feeding
Gut Contents
Argentine Sea
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:11336/40862
Acceder
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network_name_str CONICET Digital (CONICET)
spelling First-feeding of hake (Merluccius hubbsi) larvae and prey availability in the North Patagonian spawning areaViñas, Maria DeliaSantos, BetinaMerluccius HubbsiFirst FeedingGut ContentsArgentine Seahttps://purl.org/becyt/ford/1.6https://purl.org/becyt/ford/1The diet of Merluccius hubbsi first-feeding larvae was analysed and related to food availability in stratified waters of the Patagonian spawning area. The gut contents of small larvae ranging from 2 to 4 mm SL, collected from five consecutive depth strata (upper 50 m of the water column), were examined. After dissection of the larvae, the prey items were stained with tolouidine blue. The feeding incidence, and the types, sizes and numbers of food particles per larvae were determined. The mean feeding incidence was 64.5 %. Food particles 45 to 136 μm in width constituted the bulk of the prey ingested, which consisted of nauplii and early copepodites of the small copepod species frequently found in the sampling area. The most abundant taxa among the gut contents were Paracalanus parvus. Oithona spp.. Acartia tonsa and members of Pseudocalanidae. The mean number of nauplii per larva was 4.4 times higher than the number of copepodites, but the volumetric ratio between the two groups was 1.4:1. The results of larval gut analysis were related to zooplankton distribution in the field. First-feeding strategies of hake and anchovy larvae growing in the area were compared.Fil: Viñas, Maria Delia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Mar del Plata. Instituto de Investigaciones Marinas y Costeras. Subsede Instituto Nacional de Investigación y Desarrollo Pesquero; ArgentinaFil: Santos, Betina. Instituto Nacional de Investigaciones y Desarrollo Pesquero; ArgentinaFederal Research Centre for Fisheries2000-12info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/40862Viñas, Maria Delia; Santos, Betina; First-feeding of hake (Merluccius hubbsi) larvae and prey availability in the North Patagonian spawning area; Federal Research Centre for Fisheries; Archive Of Fishery And Marine Research; 48; 3; 12-2000; 213-2250944-1921CONICET DigitalCONICETenginfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:18:59Zoai:ri.conicet.gov.ar:11336/40862instacron: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:34982025-09-29 10:18:59.646CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv First-feeding of hake (Merluccius hubbsi) larvae and prey availability in the North Patagonian spawning area
title First-feeding of hake (Merluccius hubbsi) larvae and prey availability in the North Patagonian spawning area
spellingShingle First-feeding of hake (Merluccius hubbsi) larvae and prey availability in the North Patagonian spawning area
Viñas, Maria Delia
Merluccius Hubbsi
First Feeding
Gut Contents
Argentine Sea
title_short First-feeding of hake (Merluccius hubbsi) larvae and prey availability in the North Patagonian spawning area
title_full First-feeding of hake (Merluccius hubbsi) larvae and prey availability in the North Patagonian spawning area
title_fullStr First-feeding of hake (Merluccius hubbsi) larvae and prey availability in the North Patagonian spawning area
title_full_unstemmed First-feeding of hake (Merluccius hubbsi) larvae and prey availability in the North Patagonian spawning area
title_sort First-feeding of hake (Merluccius hubbsi) larvae and prey availability in the North Patagonian spawning area
dc.creator.none.fl_str_mv Viñas, Maria Delia
Santos, Betina
author Viñas, Maria Delia
author_facet Viñas, Maria Delia
Santos, Betina
author_role author
author2 Santos, Betina
author2_role author
dc.subject.none.fl_str_mv Merluccius Hubbsi
First Feeding
Gut Contents
Argentine Sea
topic Merluccius Hubbsi
First Feeding
Gut Contents
Argentine Sea
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.6
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv The diet of Merluccius hubbsi first-feeding larvae was analysed and related to food availability in stratified waters of the Patagonian spawning area. The gut contents of small larvae ranging from 2 to 4 mm SL, collected from five consecutive depth strata (upper 50 m of the water column), were examined. After dissection of the larvae, the prey items were stained with tolouidine blue. The feeding incidence, and the types, sizes and numbers of food particles per larvae were determined. The mean feeding incidence was 64.5 %. Food particles 45 to 136 μm in width constituted the bulk of the prey ingested, which consisted of nauplii and early copepodites of the small copepod species frequently found in the sampling area. The most abundant taxa among the gut contents were Paracalanus parvus. Oithona spp.. Acartia tonsa and members of Pseudocalanidae. The mean number of nauplii per larva was 4.4 times higher than the number of copepodites, but the volumetric ratio between the two groups was 1.4:1. The results of larval gut analysis were related to zooplankton distribution in the field. First-feeding strategies of hake and anchovy larvae growing in the area were compared.
Fil: Viñas, Maria Delia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Mar del Plata. Instituto de Investigaciones Marinas y Costeras. Subsede Instituto Nacional de Investigación y Desarrollo Pesquero; Argentina
Fil: Santos, Betina. Instituto Nacional de Investigaciones y Desarrollo Pesquero; Argentina
description The diet of Merluccius hubbsi first-feeding larvae was analysed and related to food availability in stratified waters of the Patagonian spawning area. The gut contents of small larvae ranging from 2 to 4 mm SL, collected from five consecutive depth strata (upper 50 m of the water column), were examined. After dissection of the larvae, the prey items were stained with tolouidine blue. The feeding incidence, and the types, sizes and numbers of food particles per larvae were determined. The mean feeding incidence was 64.5 %. Food particles 45 to 136 μm in width constituted the bulk of the prey ingested, which consisted of nauplii and early copepodites of the small copepod species frequently found in the sampling area. The most abundant taxa among the gut contents were Paracalanus parvus. Oithona spp.. Acartia tonsa and members of Pseudocalanidae. The mean number of nauplii per larva was 4.4 times higher than the number of copepodites, but the volumetric ratio between the two groups was 1.4:1. The results of larval gut analysis were related to zooplankton distribution in the field. First-feeding strategies of hake and anchovy larvae growing in the area were compared.
publishDate 2000
dc.date.none.fl_str_mv 2000-12
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/11336/40862
Viñas, Maria Delia; Santos, Betina; First-feeding of hake (Merluccius hubbsi) larvae and prey availability in the North Patagonian spawning area; Federal Research Centre for Fisheries; Archive Of Fishery And Marine Research; 48; 3; 12-2000; 213-225
0944-1921
CONICET Digital
CONICET
url http://hdl.handle.net/11336/40862
identifier_str_mv Viñas, Maria Delia; Santos, Betina; First-feeding of hake (Merluccius hubbsi) larvae and prey availability in the North Patagonian spawning area; Federal Research Centre for Fisheries; Archive Of Fishery And Marine Research; 48; 3; 12-2000; 213-225
0944-1921
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
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
dc.publisher.none.fl_str_mv Federal Research Centre for Fisheries
publisher.none.fl_str_mv Federal Research Centre for Fisheries
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
_version_ 1844614157677101056
score 13.070432

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