Trophic ecology of bullet tuna Auxis rochei larvae and ontogeny of feeding-related organs

12 pages, 12 figures, 2 tables

Detalles Bibliográficos
Autores: Morote, Elvira, Olivar, M. Pilar, Pankhurst, Patricia M., Villate, Fernando, Uriarte, Ibon
Tipo de recurso: artículo
Fecha de publicación:2008
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/17446
Acceso en línea:http://hdl.handle.net/10261/17446
Access Level:acceso abierto
Palabra clave:Bullet tuna larvae
Feeding ecology
Prey selection
Ontogeny
Vision
NW Mediterranean
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spelling Trophic ecology of bullet tuna Auxis rochei larvae and ontogeny of feeding-related organsMorote, ElviraOlivar, M. PilarPankhurst, Patricia M.Villate, FernandoUriarte, IbonBullet tuna larvaeFeeding ecologyPrey selectionOntogenyVisionNW Mediterranean12 pages, 12 figures, 2 tablesThe bullet tuna Auxis rochei, Risso 1810, is a small tuna widely distributed in tropical and temperate Seas. The present study reports on the first attempt to jointly monitor diet and food selection in larvae of this species and to assess the influence of the ontogenetic development of feeding-related organs on the diet. A. rochei larvae from 2 to 7 mm long are diurnal feeders and highly active predators, with high values of feeding incidence, gut fullness and number of ingested prey items. The rate of change in prey item size in relation to larval size was higher than in other species. Only small, non-motile prey items are eaten at the onset of feeding. Rapid mouth development and the early appearance of teeth allow larvae from 3 to 5 mm long to ingest a wide range of prey. However, niche breadth decreases at 5 mm, when larvae avoid small prey items in favour of larger ones with a higher carbon content. Chesson’s selectivity index indicated that small larvae (from 2 to 3 mm long) selected a variety of small prey items, mainly copepod nauplii. Larvae measuring 3 to 5 mm selectively ate cladocerans and appendicularians, and larvae with lengths ≥5 mm preferred appendicularians and fish larvae. Precocious body development (mouth, teeth, and onset of stomach and caudal fin development) and improved visual acuity(larger lens diameter and angular cone density) are factors that contribute to the feeding success of larvae of this speciesThis research was funded by the CTM2004-03510-C02-01/MAR Project. E.M. acknowledges predoctoral FPI Fellowship support from Spain’s Ministry of Education and Science. P.M.P. was supported by a James Cook University Aquaculture and Emerging Species Research Advancement Program GrantPeer reviewedInter Research200920092008info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_65013016421 bytesapplication/pdfhttp://hdl.handle.net/10261/17446reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Ingléshttps://doi.org/10.3354/meps07206info:eu-repo/semantics/openAccessoai:digital.csic.es:10261/174462026-05-22T06:33:51Z
dc.title.none.fl_str_mv Trophic ecology of bullet tuna Auxis rochei larvae and ontogeny of feeding-related organs
title Trophic ecology of bullet tuna Auxis rochei larvae and ontogeny of feeding-related organs
spellingShingle Trophic ecology of bullet tuna Auxis rochei larvae and ontogeny of feeding-related organs
Morote, Elvira
Bullet tuna larvae
Feeding ecology
Prey selection
Ontogeny
Vision
NW Mediterranean
title_short Trophic ecology of bullet tuna Auxis rochei larvae and ontogeny of feeding-related organs
title_full Trophic ecology of bullet tuna Auxis rochei larvae and ontogeny of feeding-related organs
title_fullStr Trophic ecology of bullet tuna Auxis rochei larvae and ontogeny of feeding-related organs
title_full_unstemmed Trophic ecology of bullet tuna Auxis rochei larvae and ontogeny of feeding-related organs
title_sort Trophic ecology of bullet tuna Auxis rochei larvae and ontogeny of feeding-related organs
dc.creator.none.fl_str_mv Morote, Elvira
Olivar, M. Pilar
Pankhurst, Patricia M.
Villate, Fernando
Uriarte, Ibon
author Morote, Elvira
author_facet Morote, Elvira
Olivar, M. Pilar
Pankhurst, Patricia M.
Villate, Fernando
Uriarte, Ibon
author_role author
author2 Olivar, M. Pilar
Pankhurst, Patricia M.
Villate, Fernando
Uriarte, Ibon
author2_role author
author
author
author
dc.subject.none.fl_str_mv Bullet tuna larvae
Feeding ecology
Prey selection
Ontogeny
Vision
NW Mediterranean
topic Bullet tuna larvae
Feeding ecology
Prey selection
Ontogeny
Vision
NW Mediterranean
description 12 pages, 12 figures, 2 tables
publishDate 2008
dc.date.none.fl_str_mv 2008
2009
2009
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/17446
url http://hdl.handle.net/10261/17446
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv https://doi.org/10.3354/meps07206
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 3016421 bytes
application/pdf
dc.publisher.none.fl_str_mv Inter Research
publisher.none.fl_str_mv Inter Research
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15.811543

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