台湾海峡及其邻近海域游泳生物种类组成和资源现状

Species composition of necton and resources state of Taiwan Strait and its adjacent waters

2000-2001年台湾海峡及其邻近海域游泳生物调查研究表明,该海域的游泳生物有497种,其中鱼类 367种,甲壳类102种,头足类28种。种类数随纬度逐步增高而减少。鱼类区系属于印度-太平洋的中国- 日本亚区。种类数的季节变化呈秋季>夏季>春季>冬季。相对生物量指数的季节变化,呈夏季>秋季>春季>冬季。而相对密度指数的季节变化呈夏季>春季>秋季>冬季。相对生物量指数和相对密度的优势种分别为中国枪乌贼和发光鲷。各站位月平均相对生物量指数分布为每网8．149(17站)-72．679 kg·h-1(23 站),平均为每网27．089 kg·h-1。按渔场分,月平均相对生物量指数以闽南-台湾浅滩渔场>闽中渔场>闽东渔场;月平均相对密度指数分布为每网320(13站)-6 357 ind·h-1(30站),平均为每网136 ind·h-1。月平均相对生物密度指数闽南-台浅渔场>闽东渔场>闽中渔场。对渔业资源结构、种类组成变化和渔业资源现状及其开发利用程度进行了探讨。

From 2000 to 2001, the composition of species of necton was investigated in Taiwan Strait and its adjacent waters. The results show that there are of necton 497 in the waters, among them, fish 367, crustacean 102, cephalopoda 28. The number of species is more in the lower latitude, but less in the higher latitude. And that the fish fauna belongs to the sub-fauna of China Japan of the Indian-Pacific Ocean.The seasonal variations of number species were autumn > summer > spring > winter.The seasonal variations of relative biomass index and relative density index were summer > spring > autumn > winter. And the relative density index were summer > spring > autumn > winter. The dominant species of relative biomass index were Loligo chinensis and Acropoma japonicum, respectively.The stations monthly mean relative biomass index were 8.149(17 Station) to 72.679 kg·h-1 per haul(23 Station) ,toal average was 27.089 kg·h-1 per haul. Monthly mean relative biomass index of Minnan-Taiwan shoal Fishing Ground > Minzhong Fishing Ground > Mindong Fishing Ground. Monthly mean relative density index were 320(13 Station) to 6 357 ind·h-1 per haul(30 Station), total average were 436 ind·h-1 per haul. Monthly mean relative density index of Minnan-Taiwan shoal Fishing Ground > Mindong Fishing Ground > Minzhong Fishing Ground.The structure of fishery resources and the variations of composition of species and fishery resource states and the developed level are analysed.