engleski

Variation in abundance and size of the sardine Sardina pilchardus (Walbaum) in the eastern Adriatic

The catch per unit effort of sardine, Sardina pilchardus (Walbaum, 1792), on the eastern Adriatic fishing grounds has greatly increased in recent years, notably during the past decade. So the relationship between annual mean total lenght and catch per unit effort (CPUE), as an index of population abundance was compared. Decrease in fish size indicated the occurence of a strong year class and led to an increase abundance in subsequent years. Long-term variations in catch per unit effort for 1963-1988 in relation to primary production, temperature, salinity and oxygen were analysed, with reference to the sardine, in principal fishing grounds of the eastern part of the Adriatic.

sardine; eastern Adriatic; abundance

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