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| Youssara, F; Gaudy, R. |
| Zooplankton from the upper 200 m of the Almeria-Oran frontal region, (east of the Alboran sea, western Mediterranean) was sampled during winter 1997, using two nets equipped with 200 and 80 mum mesh. Eight sites representative of the different hydrodynamic structures (Mediterranean water, geostrophic Atlantic jet, associated anticyclonic gyre) were investigated over 2 d, using two day- and two night-samples per site. Zooplankton biomass was correlated to chlorophyll abundance, with lowest values in the oligotrophic Mediterranean water and highest in Atlantic water. The high biomass resulted from the enhancement of the secondary production, as indicated by the greater proportion of nauplii and the increase of zooplankton metabolism and feeding. Total... |
| Tipo: Text |
Palavras-chave: Mer d’Alboran; Distribution; Front; Zooplancton; Alboran sea; Distribution; Front; Zooplankton. |
| Ano: 2001 |
URL: http://archimer.ifremer.fr/doc/00322/43348/42878.pdf |
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| Gaudy, R; Youssara, F; Diaz, F; Raimbault, P. |
| Zooplankton biomass was measured at 20 stations located along five coastal-offshore transects in the Gulf of Lions (NW Mediterranean) during spring 1998 and winter 1999, using two nets equipped with 200 and 80 Pm mesh. Biomass was twice as abundant in spring. It increased toward the coast and the west of the gulf and was positively correlated to chlorophyll, primary production and organic particulate matter and negatively to temperature and salinity. The enrichment effect of Rhone river input and the oligotrophic influence of the north Mediterranean current (NMC) were the main distribution factors of zooplankton biomass. Higher biomass was obtained in coastal stations with the 80 mum net, which sampled more efficiently young larval stages and nauplii.... |
| Tipo: Text |
Palavras-chave: Zooplankton; Métabolisme; Cycle saisonnal; Golfe du Lion; Zooplankton; Metabolism; Seasonal cycle; Gulf of Lions. |
| Ano: 2003 |
URL: http://archimer.ifremer.fr/doc/00321/43262/42993.pdf |
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| Gaudy, R; Youssara, F. |
| Respiration, excretion (NH4 and PO4) and feeding of zooplankton from the upper 200 m of the Almeria-Oran frontal region (western Mediterranean), were studied during winter 1997. Eight sites belonging to the three main hydrodynamic structures of the area (Mediterranean water, geostrophic Atlantic jet and associated anticyclonic gyre) were considered. Lowest values of respiration, PO4 excretion, O/P atomic ratio and particle ingestion were found in Mediterranean waters. At the frontal limit, respiration and ammonium excretion were enhanced compared to the adjacent structures (Mediterranean water and Atlantic jet). In the gyre water, lowest O/N and highest N/P values were observed and maximum faecal pellet production and reproduction activity (inferred from... |
| Tipo: Text |
Palavras-chave: Mer d'Alboran; Front; Zooplancton; Métabolisme; Nutrition; Alboran sea; Front; Zooplankton; Metabolism; Feeding. |
| Ano: 2003 |
URL: http://archimer.ifremer.fr/doc/00322/43275/43006.pdf |
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