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handle: 10261/320438 , 10508/6730
Se analizan 30 muestras ictioplanctónicas, recogidas en 28 estaciones distribuidas en el sector noroccidental del mar de Alborán, durante marzo de 1982; comparándose los resultados obtenidos con las redes Bongo y Neuston, y completando el estudio con el análisis de los siguientes parámetros: temperatura y salinidad superficiales, biomasa zooplanctónica, clorofilas y nutrientes. Los componentes ictioplanctónicos de la especie Sardina pilchardus, que en esta época del año se aproxima a la fase final de su desove, han representado las siguientes cantidades: los huevos significaron el 16.1% del total de las capturas, mientras que la proporción de sus larvas ha sido el 17.4% del total. Se han localizado dos áreas de puesta de esta especie solapadas con las áreas de más elevadas abundancias de huevos. La que registra mayor abundancia se encuentra al oeste de la bahía de Málaga, con una abundancia máxima de 570 huevos/m2; y la segunda, al este de dicha bahía, con 175 huevos/m2. En la bahía de Málaga se han registrado los valores más elevados de biomasa zooplanctónica y de clorofilas con los respectivos registros máximos de 57.8 mg/m3 y 54.5 mg/m3 en peso seco y 5.91 mg/m3 de clorofila "a" a 1 m. Por otro lado, la particular condición hidrológica de esta bahía y el análisis realizado con las tallas larvarias de la sardina, parece indicar que esta zona puede considerarse como favorable a la cría y desarrollo de esta especie.
Abstract: A series of 30 ichthyoplankton samples proceeding from 28 stations distributed along the nortwestern sector of the Alboran Sea during a March, 1982 survey have been studied. Results from Bongo and Neuston hauls are compared and the study is completed with a brief overview of some significant parameters such as: surface temperatures and salinities, zooplankton biomass, chlorophyll and nutrients. Sardine eggs and larvae have represented 16.1% and 17.4% of the total catches, respectively. Two sardine spawning areas have been detected west (maximum egg concentration of 572 eggs/m2) and east (maximum of 175 eggs/m2) to the bay of Málaga, overlapped with areas of maximum egg concentrations. Highest values of zooplankton biomass and chlorophyll concentration are recorded in the area of the bay of Málaga with maximum values of 57.8 and 54.5 mg/m3 in dry weight and a maximum chlorophyll “a” concentration recorded at the superficial level of 5.91 mg/m3. This area due to its particular hydrological conditions and the size distribution analysis of sardine larvae seems to be adequate as a nursery ground for this species.
SI
Chlorophyll, larvae length, biomasa zooplanctónica, ichthyoplankton, salinidad, sardina, huevos de peces, nutrientes, ictioplancton, nutrients, nitrate, primavera, Myctophum punctatum, fish egg, chlorophyll, Medio Marino, nitritos, Sparidae, nitrite, Sardina pilchardus, nitratos, Fish egg, Nutrientes, phosphate, sardine larvae, spring season, temperatura, salinitiy, zooplankton biomass, Alborán Sea (Mediterranean), temperature, Fish larvae, Nutrients, Benthosema glaciale, fish larvae, larvas de peces, Centro Oceanográfico de Málaga, Myctophidae, fosfatos, tallas larvarias, mar de Alborán (Mediterráneo), clorofila “a”
Chlorophyll, larvae length, biomasa zooplanctónica, ichthyoplankton, salinidad, sardina, huevos de peces, nutrientes, ictioplancton, nutrients, nitrate, primavera, Myctophum punctatum, fish egg, chlorophyll, Medio Marino, nitritos, Sparidae, nitrite, Sardina pilchardus, nitratos, Fish egg, Nutrientes, phosphate, sardine larvae, spring season, temperatura, salinitiy, zooplankton biomass, Alborán Sea (Mediterranean), temperature, Fish larvae, Nutrients, Benthosema glaciale, fish larvae, larvas de peces, Centro Oceanográfico de Málaga, Myctophidae, fosfatos, tallas larvarias, mar de Alborán (Mediterráneo), clorofila “a”
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