台湾海峡中,北部的蟹类

本文根据我所1983年5月至1984年5月台湾海峡中、北部海洋综合调查资料进行研究,结果表明,本区蟹类已鉴定到种的有112种,其中以梭子蟹科(30种)、玉蟹科(25种)和长脚蟹科(23种)占优势,优势程度较高的种类依次为红色相机蟹、双斑(虫寻)、模糊新短眼蟹和刺足掘沙蟹。全区蟹类平均生物量和栖息密度分别为1.55g/m~2和13个/m~2,其分布以近岸水域高于调查区东侧水域;在季节变化上以秋季最高,冬季最低;细颗粒沉积区蟹类生物量高,粗颗粒沉积区种数较丰富。

Crabs from central and northern Taiwan Strait

The paper is based upon crab samples collected in the comprehensive investigation made in the central and northern parts of the Taiwan Strait from May 1983 to May 1984 by the Fujian Institute of Oceanology.We have initially indentified 112 species of crab from the region investigated. Most of that are widely distributed in the tropical and subtropical Indo-West Pacific waters, Portunidae(30), Leucosiidae (25) and Goneplacidae(23) are dominant in species number. Portunidae and Goneplacidae were dominant individual number. Camatopsis rubida, Charybdis bimaculata, Neoxenophthalmus obscurus and Scalopidia spinosipes were the dominant species in the studied area. The average biomass and density of crab were 1.55g/m~2 and 13 ind./m~2 respectively, higher in the offshore waters and lower in the eastern waters of the studied area, maximum in autumn and minimum in winter. The biomass of crab was higher in finer sediments, the species number of crab was higher in coarser sediments.