| Summary: | 12 pages, 2 figures, 7 tables [EN] We give in this work a commentary about the catches in number and weight of the traps. Also the definitio of the catch per unit of effort used and catch per unit of effort obtained. In these last years the catches of tuna has decreased from 5.000 metric tons in 1962 to 339 Tm in 1977, that is to say from 30.180 to 1.626 tunas, respectively. [.] Thunnus alalunga, Thunnus obesus, Thunnus albacares, Orcinus orca [ES] Este trabajo es una apliación, puesta al día y revision de otro anterior (Rodríguez-Roda, 1973) en el que calculábamos los rendimientos por unidad de esfuerzo de las almadrabas del sur de España en el período de 1962 a 1972. [.] Peer reviewed
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