Seasonal distribution, abundance and diversity of demersal fishes in the inner Ría de Arosa, NW Spain
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A year of seasonal trawling was initiated in Ria de Arosa, Spain in an area with mussel rafts and an area without mussel rafts, to assess the effect of the presence of the mussels and their associated fauna on the distribution and abundance of the demersal fishes, The demersal fish cornmunity exhibited a strong resident component comprising greater than 96% of the total catch and was dominated by gobiid species, The dominance of gobies resulted in a fish cornmunity composed of a large number of small fish (x = 0'22 individuals/ m"). There were no overwhelming differences in the fish cornmunities or cornmunity indices of the raft and non-raft areas, although biomass and diversity were generally higher in the raft area and the abundances of several species were significantIy different in the two areas, Seasonal biomass estimates ranged from 1'19 to 2'08 g m -2 (x = 1'69) in the raft area and were highest in September and lowest in January, Biomass in the non-raft area ranged ...
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