Distribution and relative abundance of the blue shark, Prionace glauca, in the South Brazil

Authors

  • Jefferson F. A. LEGAT Empresa Brasileira de Pesquisa Agropecuária, Embrapa Meio-Norte
  • Carolus M. VOOREN Fundação Universidade Federal do Rio Grande, Laboratório de Elasmobrí­¢nquios e Aves Marinhas

Keywords:

CPUE, South Atlantic Ocean, water masses

Abstract

A total of 233 blue sharks Prionace glauca (Linnaeus, 1758) were caught by pelagic longline between 1996 and 1999 at different seasons. The study area was the continental slope of the southwestern Atlantic Ocean and adjacent oceanic waters, between 27oS and 35oS, at fishing depths between 25 and 200 m. According to CPUE (number of individuals/1,000 hooks), P. glauca was abundant in November (24.0%) and July (37.5); showed low abundance during March/April (9.2) and was scarce in August (2.2) and December (1.38). The highest concentrations were observed in South Atlantic Central Water (SACW). The scarcity of P. glauca was related to the presence of Subantartic Waters and thermic inversions between surface and the profundity of 100 m approximately.

Downloads

Published

2018-11-03

Issue

Vol. 34 No. 3 (2008): BOLETIM DO INSTITUTO DE PESCA

Section

Scientific Article