浙江南部外海渔场鱼类区系特征研究

根据2006年5月--2007年2月在浙江南部外海渔场使用单拖网开展渔业资源调查所获的鱼类样品,初步研究分析了该海域鱼类种类组成和区系特征。结果表明：浙江南部外海渔场调查海域共有鱼类205种,其中硬骨鱼类为195种,软骨鱼类为10种,隶属于20目,85科,145属。大多数为暖水性种类,共有135种,占鱼类总种数的65.9%;暖温性种类次之,共有67种,占鱼类总种数的32.7%;冷温性种类较少,仅3种,占鱼类总种数的1.5%。鱼类区系属印度-西太平洋区的中-日亚区,其区系关系与我国南海的关系最为密切,其次是是日本,而与黄海、渤海关系较疏远。在调查所得的鱼类中,以底层鱼类所占比重最大,为65.9%,近底层鱼类次之,占15.6%,岩礁性鱼类、中上层鱼类分别占9.8%、8.8%。经济价值较高、捕捞产量较好的重要种类主要是刺鲳、竹筴鱼、短鳍红娘鱼、带鱼、黄鳍马面鲀等。

The Faunal Characteristics of Fish in the Offshore Waters of Southern Zhejiang Province

According to bottom trawling surveys in the offshore waters of southern Zhejiang Province from May, 2006 to February, 2007, the author analyzed the composition and faunal characteristics of the fishes. The result showed that the fishing ground of the offshore area of southern Zhejiang Province held 205 species of fishes involving 20 orders, 85 families and 145 genera, and 195 of them were Osteichthyes while the other 10 belonged to Chondrichthyes. 135 species were warm-water ones, 67 were warm-temperate and only 3 were cold-temperate. The fauna of the fishes affiliates to the sub-fauna of China-Japan in the Indian Pacific Ocean, which is much closer to that of the South China Sea and the southern sea of Japan, and far from that of the Yellow Sea and Bohai Sea. Within the obtained species, the benthic fishes occupy the largest proportion which is 65.9% while the epibenthic fishes occupy 15.6% and the reef fishes together with the pelagic ones occupy the smallest which are respectively 9.8% and 8.8%. The chief species which hold high economic value and fishing outcome consist of Psenopsis anomala, Trachurus japonicus, Lepidotrigla micropterus, Trichiurus haumela, Navodon xanthopterus etc.