台湾海峡西部海域浮游软体动物的分布

DISTRIBUTION OF PELAGIC MOLLUSCS IN WESTERN TAIWAN STRAIT

本文研究了台湾海峡西部海域浮游软体动物的种类组成、数量分布、季节变化及其与环境因子的关系。

This paper deals with the pelagic molluscs collected in the comprehensive investigation of the western Taiwan Strait (116°40′—120°30′E,22°22.9′—26°43′N) from May 1984 to Feb. 1985. The pelagic molluscs were identified and counted. 34 species were found. Creseis acicula and Limacina trochiformis were dominant species in the survey region. The numbers of both species and total individual increased with increasing temperature. The greatest numbers of the two species cceured in summer in the year. According to the distribution of number, seasonal variation of molluscs and their relation to hydrographical conditions, the pelagic molluscs found in the region can be divided into two ecological groups: curyhaline warm water and hypersaline offshore warm water. Their seasonal succession and quantitative distribution were limited by the movement of l(?)orsl and offshore current systems.