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handle: 10261/320669 , 10508/6928
Se analizan los resultados obtenidos en 59 estaciones muestreadas en el golfo de Cádiz, el estrecho de Gibraltar y el sector noroeste del mar de Alborán, en julio de 1995. Se presentan las principales características hidrológicas registradas durante la prospección y su posible relación con las composiciones y distribuciones planctónicas. En el golfo de Cádiz, con aguas más someras, cálidas y de menor salinidad, predominan los huevos y lavas de boquerón Engraulis encrasicolus (L., 1758) y de alacha Sardinella aurita Valenciennes, 1847 (tipicamente costeros), mientras que en mar de Alborán, con plataforma estrecha y un afloramiento activo, el ictioplancton oceánico de Maurolicus muelleri (Gmelin, 1788) es el mayoritario. Las diferentes características topográficas y oceanográficas de ambas zonas también se han reflejado en los análisis complementarios realizados. Así, las aguas atlánticas se caracterizan por presentar valores inferiores en concentraciones (actividad nitrato reductasa, material particulado, clorofila a y feopigmentos), mayores concentraciones de fosfatos y mayor abundancia de grupos planctónicos de pequeño tamaño (bacterioplacton, picoplancton autótrofo, flagelados, ciliados, cladóceros y copépodos).
The results obtained from 59 stations sampled in the Gulf of Cadiz, Straits of Gibraltar and Alborán Sea (northwest sector) during July 1995 are analysed in this paper. The main hydrological characteristics recorded during the survey and their possible relationship with planktonic distribution and composition are presented. The eggs and larvae of anchovy Engraulis encrasicolus (L., 1758) and gilt sardine Sardinella aurita Valenciennes, 1847 (typically coastal) were the most abundant in the Gulf of Cadiz, where warmer, fresher and shallower waters are dominant. However, the Maurolicus muelleri (Gmelin, 1788) plankton components (oceanic) predominated in the Alborán Sea, characterised by a narrow continental shelf and active upwelling. The different topographic and hydrographic features of these geographic zones were also apparent in the complementary analyses that were carried out: Atlantic waters were characterised by lower concentration values of nitrate reductase activity, particulate matter, chlorophyll-a and phaeopigments, and higher values of phosphate concentrations and small planktonic organisms (bacterioplankton, autotrophic picoplankton, flagellates, ciliates, cladocerans and copepods).
SI
zooplankton, nitrate reductase activity, Alborán Sea, Sardinella aurita, Engraulis encrasicolus, ichthyoplankton, copepods, hydrology, picoplankton, Straits of Gibraltar, nutrients, Maurolicus muelleri, Medio Marino, Gulf of Cádiz, cladocerans, phaeopigments, particulate matter, Gilt sardine, bacterioplankton, flagellates, Nutrients, Alboran Sea, Centro Oceanográfico de Málaga, chlorophyll-a, Anchovy, ciliates
zooplankton, nitrate reductase activity, Alborán Sea, Sardinella aurita, Engraulis encrasicolus, ichthyoplankton, copepods, hydrology, picoplankton, Straits of Gibraltar, nutrients, Maurolicus muelleri, Medio Marino, Gulf of Cádiz, cladocerans, phaeopigments, particulate matter, Gilt sardine, bacterioplankton, flagellates, Nutrients, Alboran Sea, Centro Oceanográfico de Málaga, chlorophyll-a, Anchovy, ciliates
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