地中海金枪鱼延绳钓渔获物组成的初步分析

本文对１９９５年５月－６月、１９９６年４月下旬－７月初地中海金枪鱼延绳钓汛期间渔获物组成进行初步分析。结果表明主要渔获物种有蓝鳍金枪鱼、箭鱼、大青鲨、翻车鱼、龟、极少见的鱼种有尖吻青鲨、长鳍金枪鱼、叉尾长鳍乌舫以及肛科的一种肛。

A PRELIMINARY ANALYSIS ON THE COMPOSITION OF CATCHES OBTAINED BY LONGLINE FISHING IN THE MEDITERRANEAN SEA

In this paper a preliminary analysis was performed on composition of catches obtained by longline fishing in the Mediterranean Sea during fishing seasons of two years May-June in 1995 and late April-early July in 1996. The results showed that species of catches which often appeared were bluefin tuna Thunnus thynnus (Linnaeus), swordfish Xiphias gladius Linnaeus, blue shark Prionace glauca (Linnaeus, 1758), oceanic sunfish Molo molo (Linnaeus, 1758 ) and Atlantic loggerhead turtle Caretta caretta caretta (Linnaeus, 1758). The species of catches which rarely appeared were shortfin mako Isurus oxyrinchus Rafinesque, 1810, Albacore Thunnus alalunga (Bonnaterre ), bigscale pomfret Taractichthys longiPinnis (Lowe) and a kind of rays (Dasyatidae). In the catches bluefin tuna is a predominant species, accounting for 81. 0% (1995) and 66. 9 % (1996). As for the other species including swordfish, blue shark, oceanic sunfish and Atlantic loggerhead turtle were considerably low in proportion.