福建平潭一头误捕灰鲸的部分形态学记录

2011 年11 月5 日,福建省平潭县白青乡青峰村渔民出海作业时发现一头误撞定置刺网死亡的灰鲸,为福建省的首次灰鲸误捕案例,也是本世纪以来我国海域的首次灰鲸误捕记录。本文描述了该灰鲸的外形特征和骨骼系统,并报道外形和骨骼的测量数据。该灰鲸系雌性,体长1 309 cm,体重约21 t,为目前本种在我国海域搁浅/ 误捕记录中的最大个体。头骨长281 cm,宽128 cm,重250 kg;脊椎式为C7 + T13 + L13 +Ca23 = 56;指式为Ⅰ1,Ⅱ3,Ⅲ7,Ⅳ5,Ⅴ3;肋骨14 对,V 形骨10 枚。脊椎式、指式、肋骨和V 形骨较之以前的报道存在差异,说明灰鲸的脊椎式、指式、肋骨和V 形骨可能存在个体差异。此外,本文还综述了西北太平洋灰鲸目前所面临的主要致危因素。

Partial morphological records of a gray whale (Eschrichtius robustus) incidentally caught at Pingtan, Fujian Province,China

On November 5,2011,a dead gray whale (Eschrichtius robustus)entangled with a set gillnet was found by fishermen at Pingtan,Fujian Province,China. Notably,this is the first incidental catch of gray whale in Fujian Province,as well as the first record in Chinese waters in the 21th century. This paper reports the external morphological characteristics
and skeletal measurements of this whale. The whale was a female,its body length and weight were 1 309 cm and 21t respectively, which is the largest gray whale stranded/ by-caught in Chinese waters to date. The cranium of this gray whale was 281cm in length,128 cm in width,and 250 kg in weight. The vertebra,phalanx,rib and V-bone of this whale were different from those reported previously.Specifically,its vertebra arrangement was C7 + T13 + L13 + Ca23 = 56 and phalanx arrangement was Ⅰ1,Ⅱ3,Ⅲ7,Ⅳ5,V3. In addition, this whale had 14 pairs of ribs and 10 V-bones. These findings indicate that the skeletons of gray whales may vary between individuals. This paper also reviews the main threats to the Western North Pacific gray whale.