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handle: 10261/320044 , 10508/1450
Se han caracterizado y comparado la estructura y la diversidad de la ictiofauna nectobentónica de los fondos oceánicos de la costa sur de Portugal a partir de los valores de biomasa -en kg/(milla náutica)²- de diez especies de teleósteos y siete especies de condrictios. Las diferencias de biomasa entre las distintas especies nectobentónicas encontradas fueron determinadas por intervalos de profundidad y épocas de muestreo. Los resultados vienen a demostrar que, incluso por intervalos de profundidad de 100 m, hay diferencias significativas entre las comunidades de peces, y que hay algunas especies que contribuyen en la mayoría de estas diferencias. Sin embargo, no se pudo encontrar ninguna diferencia significativa entre épocas y tampoco entre los años de muestreo. Existe una separación entre los tipos de habitat del talud entre 400-700 m de profundidad y otros situados en zonas más profundas, resultado de un cambio en las comunidades piscícolas.
The present study characterises and compares the structure and diversity of the deep-sea benthopelagic ichthyofauna off the southern Portuguese coast, according to the biomass values -in kg/(nautical mile)²- of ten teleost and seven chondrichthyan species. The differences between the biomass of benthopelagic species were assessed by depth interval and sampling season. It seems clear that even at 100 m depth intervals there are differences within the fish assemblages, and that a few species make most of the contribution to such differences. No traces of seasonality or even differences between the sampling years have been found. There is a separation between slope habitats from 400-700 m depth and deeper ones, determined by a change in fish communities.
Instituto Español de Oceanografía
Portugal, Demersal, Algarve, Medio Marino, ictiofauna
Portugal, Demersal, Algarve, Medio Marino, ictiofauna
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