| Registro completo |
| Provedor de dados: |
ArchiMer
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| País: |
France
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| Título: |
Growth of Northwest Iberian juvenile hake estimated by combining sagittal and transversal otolith microstructure analyses
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| Autores: |
Pineiro, C
Rey, J
De Pontual, Helene
Garcia, A
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| Data: |
2008-09
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| Ano: |
2008
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| Palavras-chave: |
NW Iberian waters
Seasonal variation
Daily growth
Otolith microstructure
Juvenile hake
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| Resumo: |
Daily growth of Atlantic juvenile hake from Northwest Iberia has been estimated employing a new approach combining analyses of transversal and sagittal sections of the otoliths along the ventral radius. Age of juvenile hake ranging from 3 to 25 cm collected during a spring 2002 survey was estimated. Somatic growth followed a power fit: Fish size (TL) = 3.3254*age(0.7336) (r(2) =0.87, p < 0.001, n = 76). yielding an average individual growth rate of 0.66 mm/day (0.06). The growth model indicates that after a year's life a juvenile can reach 25 cm. Otolith ventral radius ranged from 401 to 1842 mu m and daily increments were between 104 and 387. Fish growth and otolith growth were closely related (r(2) = 0.92 p < 0.001, n = 76). These first results of daily growth rates for the Southern stock corroborate the fast-growth hypothesis of this species. The evolution of increment widths from hatch dates onwards reveals important seasonal growth peaks during July-August and October-November. A comparison with prior data and discussion is also presented in the light of recent work on hake juveniles and tagging-recapture experiences. (c) 2008 Elsevier B.V. All rights reserved.
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| Tipo: |
Text
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| Idioma: |
Inglês
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| Identificador: |
http://archimer.ifremer.fr/doc/2008/publication-6111.pdf
DOI:10.1016/j.fishres.2008.04.001
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| Editor: |
Elsevier
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| Relação: |
http://archimer.ifremer.fr/doc/00000/6111/
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| Formato: |
application/pdf
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| Fonte: |
Fisheries Research (0165-7836) (Elsevier), 2008-09 , Vol. 93 , N. 1-2 , P. 173-178
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| Direitos: |
2008 Elsevier
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