A fauna acompanhante da pesca industrial do camarão-rosa na plataforma continental norte brasileira.

Abstract

Industrial shrimp fishing in South America began in 1959 with the results of exploratory fishing cruises conducted in 1957 and 1958 by the American research ship Oregon. The study area is located on the northern continental shelf of Brazil comprising the states of Pará and Amapá in depths between 16 and 97.5 meters. The study was carried out from February to October 2003 and used as a database material collected on board industrial vessels that fish for pink shrimp. 16 vessels that operate with bottom trawling were used and the shipments lasted an average of 25 days, in each trawl the time ranged between 4 and 6 hours. 701 hauls were monitored, totaling 175 days at sea and 2,804 haul hours. During the period, the ratio of pink shrimp (whole)/following fauna was around 1:4.2. We verified that pink shrimp fishing is more productive in the first semester and is concentrated in the depths of 30 to 70 meters. It was observed that the relationship between pink shrimp and accompanying fauna fluctuates seasonally and that the Macrodon ancylodon species is very frequent and is present in all depth strata. Comparing daytime and nocturnal catches, we did not find differences in catches of by-catch and in total catches, but there were differences for catches of pink shrimp, with the nocturnal period being the most productive.