The increment of cephalopod catch should be attributed to the improvement of demersal trawl fishing techniques, and would not necessarily mean the increment of the cephalopod abundance.

 
  • 随着底拖网捕捞技术的提高,头足类的密度指数有所增加,但并不说明头足类的资源就很丰富。
今日热词
目录 附录 查词历史