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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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Possible link between prey quality, condition and growth of juvenile hake (Merluccius merluccius) in the Gulf of Lions (NW Mediterranean) ArchiMer
Harmelin Vivien, Mireille; Mahe, Kelig; Bodiguel, Xavier; Mellon, Capucine.
The energy value of the main prey and the growth of juvenile hake in the Gulf of Lions were analysed to determine whether fish condition could be linked to difference in prey quality and resulted in growth difference. Large differences in energy content (15.6 to 23.6 kJ g(-1) DW) among prey types were recorded with low values found in amphipods and natantid shrimps, intermediate values in euphausiids and mysids, and high values in fish. High condition in juvenile hake was linked to the consumption of prey with high energy content. However, no difference in fish growth was observed by the analysis of otolith micro-increments.
Tipo: Text Palavras-chave: Merluciidae; Merluccius merluccius; Hake; Mediterranean Sea; Energy; Condition; Otolith microstructure.
Ano: 2012 URL: http://archimer.ifremer.fr/doc/00092/20332/18611.pdf
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