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Growth of Northwest Iberian juvenile hake estimated by combining sagittal and transversal otolith microstructure analyses ArchiMer
Pineiro, C; Rey, J; De Pontual, Helene; Garcia, A.
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...
Tipo: Text Palavras-chave: NW Iberian waters; Seasonal variation; Daily growth; Otolith microstructure; Juvenile hake.
Ano: 2008 URL: http://archimer.ifremer.fr/doc/2008/publication-6111.pdf
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