?Incidental Catch Of Dolphins In Mid-Water Trawls For Southern Anchovy Off Patagonia?

CRESPO ENRIQUE ALBERTO; KOEN-ALONSO MARIANO; DANS SILVANA LAURA; GARCÍA NÉSTOR ANÍBAL; PEDRAZA SUSANA NOEMI; COSCARELLA MARIANO ALBERTO; GONZÁLEZ, RAÚL

THE JOURNAL OF CETACEAN RESEARCH AND MANAGEMENT

International Whaling Commission

Año: 2000 vol. 2 p. 11 - 16

1561-0713

Incidental mortality of dusky and common dolphins was recorded on mid-water trawls in the coasts of the Argentine shelf during the 1990´s. Argentine anchovy is an under-exploited resource among the Argentine fisheries which is usually taken in purse-seine fisheries. However in few occasions in which it was the target species of large mid-water trawlers, anchovy-eating dolphins were incidentally caught. Few events accounted for a high number of individuals but in most of the cases the information gathered was scarce to make any prognosis. In three cases (FV Humback, Harengus and Mar Salvaje) the information was enough to calculate mortality rates for the fishing period. Nevertheless those rates could be biased as a consequence of the short period considered. FV Mar Salvaje caught around 60 common dolphins (Delphinus delphis) in few days with one tow with 20 individuals. 18 common dolphins were recovered and they included 12 males and 6 females. Age composition of the herd was 5-10 for females and 2-18 for males.