摘要
东方对虾（Ｐｅｎａｅｕｓｕｓｏｒｉｅｎｔａｌｉｓ）是分布在我国黄渤海及东海北部的重要经济虾类。长江口海区（１６９渔场）受淡水迳流的影响，浮游生物及底栖动物的生物量较高，构成了对虾良好的索饵、肥育、越冬场所。本研究通过周年样品采集（共２１６尾），逐尾进行个体测量和胃含物观察分析，查明了东方对虾在该海区的食物组成和摄食强度季节变化。其食物组成有８大类：硅藻类、原生动物、海绵动物、环节动物、软体动物、甲壳动物、棘皮动物及鱼类。摄食强度以春夏季和秋季为高，但冬季也摄食。在不同的水域（沿岸、近海）和环境（大潮、小潮）下有不同的食物组成，表明东方对虾的食性相当广泛。
Penaeus orientalis, an important economic prawn species distributes in the Yellow Sea , Pobal and the northern part of the East China Sea. Owing to the influence of freshwater runoff, the biomasses of plankton and benthos are higher at the mouth of Changjiang River ,forming a good ground for prawn nursery and wintering. Through sampling all the year round (216 individuals in total) and the biological measurements of the sample, as well as the observation and analyses of the stomach contents, the seasonal changes of food composition and feeding strength of P. orientalis in this area were identified. The food composition consisted of eight groups: diatom, protozoa, spongiaria, annelida, mollusca,crustacea, echinodermata and pisces. The feeding strength was high in spring, summer and autumn, whereas less degree in winter. Based on different food composition in various waters (coast and off shore) or environments (high and low tide), it was shown that the food habit of the prawn was considerably wide.
出处
《水产科技情报》
1994年第2期53-57,共5页
Fisheries Science & Technology Information
关键词
东方对虾
河口区
索饵特性
长江
Penaeus orientalis Estuary Food study Fishery resources
