Larval development and growth of the European hake Merluccius merluccius in the northwestern Mediterranean

[EN] The larval growth and development of the European hake, Merluccius merluccius, was studied from field larvae. Larvae were collected in the northwestern Mediterranean on three cruises carried out during the peak spawning months (November 1998, September 1999 and November 1999). Like other specie...

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Detalles Bibliográficos
Autores: Palomera, Isabel, Olivar, M. Pilar, Morales-Nin, Beatriz
Tipo de recurso: artículo
Fecha de publicación:2005
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/2356
Acceso en línea:http://hdl.handle.net/10261/2356
Access Level:acceso abierto
Palabra clave:Hake
Merluccius merluccius
Morphometrics
Larval growth
Larval development
Otoliths
Age
Merluza
Morfometría
Desarrollo larvario
Crecimiento larvario
Otolitos
id ES_0b8ca51479ff8ea01b5df4c01ef30f2a
oai_identifier_str oai:digital.csic.es:10261/2356
network_acronym_str ES
network_name_str España
repository_id_str
dc.title.none.fl_str_mv Larval development and growth of the European hake Merluccius merluccius in the northwestern Mediterranean
Desarrollo y crecimiento larvario de la merluza europea Merluccius merluccius en el Mediterráneo noroccidental
title Larval development and growth of the European hake Merluccius merluccius in the northwestern Mediterranean
spellingShingle Larval development and growth of the European hake Merluccius merluccius in the northwestern Mediterranean
Palomera, Isabel
Hake
Merluccius merluccius
Morphometrics
Larval growth
Larval development
Otoliths
Age
Merluza
Morfometría
Desarrollo larvario
Crecimiento larvario
Otolitos
title_short Larval development and growth of the European hake Merluccius merluccius in the northwestern Mediterranean
title_full Larval development and growth of the European hake Merluccius merluccius in the northwestern Mediterranean
title_fullStr Larval development and growth of the European hake Merluccius merluccius in the northwestern Mediterranean
title_full_unstemmed Larval development and growth of the European hake Merluccius merluccius in the northwestern Mediterranean
title_sort Larval development and growth of the European hake Merluccius merluccius in the northwestern Mediterranean
dc.creator.none.fl_str_mv Palomera, Isabel
Olivar, M. Pilar
Morales-Nin, Beatriz
author Palomera, Isabel
author_facet Palomera, Isabel
Olivar, M. Pilar
Morales-Nin, Beatriz
author_role author
author2 Olivar, M. Pilar
Morales-Nin, Beatriz
author2_role author
author
dc.subject.none.fl_str_mv Hake
Merluccius merluccius
Morphometrics
Larval growth
Larval development
Otoliths
Age
Merluza
Morfometría
Desarrollo larvario
Crecimiento larvario
Otolitos
topic Hake
Merluccius merluccius
Morphometrics
Larval growth
Larval development
Otoliths
Age
Merluza
Morfometría
Desarrollo larvario
Crecimiento larvario
Otolitos
description [EN] The larval growth and development of the European hake, Merluccius merluccius, was studied from field larvae. Larvae were collected in the northwestern Mediterranean on three cruises carried out during the peak spawning months (November 1998, September 1999 and November 1999). Like other species of the genus, these larvae are characterised by a well-developed anterior part of the body, head and trunk region. Nevertheless, yolk sac larvae are much more slender than larvae at notochordal flexion stages. In the present study we analysed the allometric relationships between several body measurements and body length. This is the first attempt to infer larval growth of Merluccius merluccius by means of sagittal otolith analysis. Our results show the change in the otolith shape from a lenticular otolith in early larvae to an almond-shaped otolith in larger larvae. Otolith diameter showed a power relation with larval size, with no significant differences between seasons. In spite of the sea surface temperature differences between the three periods of larval collection, the early growth estimates showed no significant differences. This was explained by the similarity in the temperature at the depths at which the larvae are located. Absolute growth rates in length were estimated by relating daily growth increments in otoliths and larval size (standard length). When using the whole larval size range the values obtained were similar to those found for other Merluccius species. Nevertheless, the present data evidenced that growth for larvae younger than 12 days is very low, showing a significant increase thereafter. This indicates that length is probably not the best parameter for describing the growth of hake larvae in the first days of life, as allometric analysis suggested
publishDate 2005
dc.date.none.fl_str_mv 2005
2007
2007
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/10261/2356
url http://hdl.handle.net/10261/2356
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv https://doi.org/10.3989/scimar.2005.69n2251
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Consejo Superior de Investigaciones Científicas (España)
publisher.none.fl_str_mv Consejo Superior de Investigaciones Científicas (España)
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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spelling Larval development and growth of the European hake Merluccius merluccius in the northwestern MediterraneanDesarrollo y crecimiento larvario de la merluza europea Merluccius merluccius en el Mediterráneo noroccidentalPalomera, IsabelOlivar, M. PilarMorales-Nin, BeatrizHakeMerluccius merlucciusMorphometricsLarval growthLarval developmentOtolithsAgeMerluzaMorfometríaDesarrollo larvarioCrecimiento larvarioOtolitos[EN] The larval growth and development of the European hake, Merluccius merluccius, was studied from field larvae. Larvae were collected in the northwestern Mediterranean on three cruises carried out during the peak spawning months (November 1998, September 1999 and November 1999). Like other species of the genus, these larvae are characterised by a well-developed anterior part of the body, head and trunk region. Nevertheless, yolk sac larvae are much more slender than larvae at notochordal flexion stages. In the present study we analysed the allometric relationships between several body measurements and body length. This is the first attempt to infer larval growth of Merluccius merluccius by means of sagittal otolith analysis. Our results show the change in the otolith shape from a lenticular otolith in early larvae to an almond-shaped otolith in larger larvae. Otolith diameter showed a power relation with larval size, with no significant differences between seasons. In spite of the sea surface temperature differences between the three periods of larval collection, the early growth estimates showed no significant differences. This was explained by the similarity in the temperature at the depths at which the larvae are located. Absolute growth rates in length were estimated by relating daily growth increments in otoliths and larval size (standard length). When using the whole larval size range the values obtained were similar to those found for other Merluccius species. Nevertheless, the present data evidenced that growth for larvae younger than 12 days is very low, showing a significant increase thereafter. This indicates that length is probably not the best parameter for describing the growth of hake larvae in the first days of life, as allometric analysis suggested[ES] Se estudió el crecimiento y desarrollo larvario de la merluza europea, Merluccius merluccius, a partir de larvas capturadas en el mar. Las larvas se pescaron en el Mediterráneo noroccidental en tres campañas que se realizaron durante los meses de máxima puesta (Noviembre 1998, Septiembre 1999 y Noviembre 1999). Como otras especies del mismo género, estas larvas se caracterizan por tener la parte anterior del cuerpo, la cabeza y el tronco, bien desarrollada. Sin embargo, las larvas lecitotróficas son mucho más alargadas que las larvas en estado de flexión del notocordio. En este estudio, analizamos las relaciones alométricas entre algunas medidas del cuerpo y la longitud del mismo. Es la primera vez que se realiza un estudio del crecimiento larvario de Merluccius merluccius por medio del análisis de los otolitos sagitta. Nuestros resultados muestran que hay un cambio en la forma del otolito, pasando de forma lenticular en larvas pequeñas a forma almendrada en larvas de mayor tamaño. El diámetro del otolito se relaciona con la talla de la larva mediante un ajuste potencial, sin encontrarse diferencias significativas en las distintas épocas analizadas. A pesar de las diferencias en la temperatura superficial encontradas en los distintos periodos muestreados, no hubo diferencias significativas en las estimas de crecimiento larvario de las tres campañas. Esto se explicaba por la similitud de las temperaturas en las profuncidades en que las larvas de merluza se distribuyen. Se estimaron tasas absolutas de crecimiento en talla relacionado el número de incrementos de crecimiento diario de los otolitos y la longitud estándar. Cuando se usó todo el rango de talla de las larvas se obtuvieron valores muy similares a los de otras especias de Merluccius. Sin embargo, nuestros datos evidenciaron que el crecimiento de las larvas de menos de 12 días de edad es muy bajo y aumenta significativamente en los días posteriores. Esto indica que probablemente la longitud no es el mejor parámetro para describir el crecimiento de la merluza en los primeros días de vida, tal como se sugería con el estudio de alometríasThis study was funded by grants under the following research programmes: 'Fil' Spanish CYTMAR MAR 97 09-02, and 'Llucet' EU Contract FAIR CT-97-3522 (1998-2000)Peer reviewedConsejo Superior de Investigaciones Científicas (España)200720072005info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501http://hdl.handle.net/10261/2356reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Ingléshttps://doi.org/10.3989/scimar.2005.69n2251info:eu-repo/semantics/openAccessoai:digital.csic.es:10261/23562026-05-22T06:33:51Z
score 15,811543

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