香港六合彩开奖结果现场直播

笔耻产濒颈肠补肠颈贸苍

Sharks, rays and chimaeras : the status of the chondrichthyan fishes

Authors: Burgess, George H., Cailliet, Gregor M., Camhi, Merry, Cavanagh, Rachel D., Fordham, Sonja V., Fowler, Sarah, Musick, John, Simpfendorfer, Colin A.,
Year: 2005
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Abstract

Many shark populations are in serious decline worldwide with little shark fisheries management in place. The 香港六合彩开奖结果现场直播 Shark Specialist Group has compiled a Global Status Report for Chondrichthyan Fishes (the Sharks, Rays and Chimaeras), with Red List assessments for over 100 species and regional reports on the status of shark fisheries, together with information on taxonomy; life history; trade; socio-economics; threats; and conservation and management initiatives.