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Registros recuperados: 5
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Buoyancy measurements and vertical distribution of eggs of sardine (Sardina pilchardus) and anchovy (Engraulis encrasicolus) Marine & Ocean Science
Coombs, S.H.; Boyra, G.; Rueda, L.D.; Uriarte, A.; Santos, M.; Conway, D.V.P.; Halliday, N.C..
Measurements were made of the density and settling velocity of eggs of sardine (Sardina pilchardus) and anchovy (Engraulis encrasicolus), using a density-gradient column. These results were related to observed vertical distributions of eggs obtained from stratified vertical distribution sampling in the Bay of Biscay. Eggs of both species had slightly positive buoyancy in local seawater throughout most of their development until near hatching, when there was a marked increase in density and they became negatively buoyant. The settling velocity of anchovy eggs, which are shaped as prolate ellipsoids, was close to predictions for spherical particles of equivalent volume. An improved model was developed for prediction of the settling velocity of sardine eggs,...
Tipo: Article Palavras-chave: SH Aquaculture. Fisheries. Angling; QH301 Biology.
Ano: 2004 URL: http://sabella.mba.ac.uk/1491/
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Evaluation de la biomasse d'anchois (Engraulis encrasicolus) dans le golfe de Gascogne en 1994 - Campagne BIOMAN 94 ArchiMer
Motos, L.; Metuzals, K.; Uriarte, A.; Prouzet, Patrick.
De 1989 à 1992 dans le cadre d'un programme FAR financé en partie par l’Union Européenne, l'Institut Technique des Pêches et de l'Alimentation (AZTI), de San Sébastien, l'Institut Français de Recherchi: pour l'Exploitation de la Mer (IFREMER) et l'institut Espagnol d'océanographie (IEO), de Santander ont étudié l'abondance et les caractéristiques de la population d'anchois du golfe de Gascogne. Les résultats obtenus ont permis de montrer la répartition et le comportement de cette ressource, mais également la grande variabilité de son abondance qui a fluctué durant cette période d'étude entre 15 000 tonnes environ en 1989 et 100 000 tonnes en 1990. Cette évaluation, faute de moyens, a été arrêtée en 1993. Face a l'importance grandissante de cette ressource...
Tipo: Text
Ano: 1995 URL: http://archimer.ifremer.fr/doc/00305/41576/40785.pdf
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Geographic variability of sardine dynamics in the Iberian Biscay region ArchiMer
Silva, A.; Skagen, D. W.; Uriarte, A.; Masse, Jacques; Santos, M. B.; Marques, V.; Carrera, P.; Beillois, Pierre; Pestana, G.; Porteiro, C.; Stratoudakis, Y..
The spatio-temporal variability in the distribution, demographic structure, recruitment, and mortality of sardine within the Iberian Biscay region is described using area-disaggregated data collected during acoustic surveys and at ports since the mid-1980s. Multiple regression models were used to describe log numbers-at-age obtained annually in ten areas covered by three surveys to test the existence of geographic differences in selectivity-at-age, recruitment strength, and mortality and to infer plausible migration routes. Within Iberian waters, sardine biomass was mainly concentrated off western Portugal and the Gulf of Cadiz. In the Bay of Biscay, biomass levels were comparable with those off western Portugal. Recruitment was localized in a few areas...
Tipo: Text Palavras-chave: Stock structure; Small pelagic fish; Population dynamics; Iberian Peninsula.
Ano: 2009 URL: http://archimer.ifremer.fr/doc/2009/publication-6459.pdf
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Modelling the vertical distribution of eggs of anchovy (Engraulis encrasicolus) and sardine (Sardina pilchardus) Marine & Ocean Science
Boyra, G.; Rueda, L.D.; Coombs, S.H.; Sundby, S.; Adlandsvik, B.; Santos, M.; Uriarte, A..
Measurements were made of the density and settling velocity of eggs of sardine (Sardina pilchardus) and anchovy (Engraulis encrasicolus), using a density-gradient column. These results were related to observed vertical distributions of eggs obtained from stratified vertical distribution sampling in the Bay of Biscay. Eggs of both species had slightly positive buoyancy in local seawater throughout most of their development until near hatching, when there was a marked increase in density and they became negatively buoyant. The settling velocity of anchovy eggs, which are shaped as prolate ellipsoids, was close to predictions for spherical particles of equivalent volume. An improved model was developed for prediction of the settling velocity of sardine eggs,...
Tipo: Article Palavras-chave: SH Aquaculture. Fisheries. Angling; QH301 Biology.
Ano: 2003 URL: http://sabella.mba.ac.uk/1490/
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Validation of age determination using otoliths of the European anchovy (Engraulis encrasicolus L.) in the Bay of Biscay ArchiMer
Uriarte, A.; Rico, I.; Villamor, B.; Duhamel, Erwan; Duenas, C.; Aldanondo, N.; Cotano, U..
Validation of the age determination procedure using otoliths of European anchovy in the Bay of Biscay was achieved by monitoring very strong year-classes in successive spring catches and surveys, as well as the seasonal occurrence of edge types. Historical corroboration of the ageing method was obtained by cross-correlation between successive age groups by year-classes in catches and surveys (1987–2013). Summary annual growth in length is also presented. Yearly annuli consist of a hyaline zone (either single or composite) and a wide opaque zone, disrupted occasionally by some typical checks (mainly at age-0 and age-1 at peak spawning time). Age determination, given a date of capture, requires knowledge of the typical annual growth pattern of otoliths,...
Tipo: Text Palavras-chave: Age estimation; Checks; Engraulidae; Otolith formation..
Ano: 2016 URL: http://archimer.ifremer.fr/doc/00342/45343/44806.pdf
Registros recuperados: 5
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