东山湾褐菖鲉食性研究

Study on feeding habits of Sebastiscus marmoratus in Dongshan Bay

本文对东山湾褐菖鲉的摄食习性、胃含物和摄食强度的季节变化以及消化器官与其食性的相互关系进行了探讨。结果表明,褐菖鲉以底栖生物食性为主,兼食游泳动物,主要摄食短尾类、蛇尾类、鱼类、长尾类、歪尾类、端足类和多板类等生物类群。其食料和生物组成随季节而变化。摄食强度以春季最高(摄食率47.34%,胃饱满系数14.77‰)、夏季最低(摄食率25.5%、胃饱满系数6.09‰)。该鱼生殖行为对摄食没有明显的影响,消化器官则与其广食性相适应。在东山湾开展褐菖鲉的人工增养殖工作具有良好的前景。

The present paper deals with the feeding habit,seasonal variation of food content and feeding in-tensity,and the relationship between the digestive organ and feeding habit of Sebastiscus marmoratuscollected from Dongshan Bay.The result shows that Sebastiscus marmoratus is a demersal fish with awide selection of food,mainly benthos and secondly nekton.Brachyura,Ophiuroidea,Pisces,Macru-ra,Anomura,Amphipoda and Polyplacophora are important food for the fish.The composition offood items varies with seasons.The feeding intensity is the highest in spring(47.3% in percentage ofstomach with food and 14.77‰ in fullness coefficient of stomach)and the lowest during summer(25.5% in percentage of stomach with food and 6.09‰ in fullness coefficient of stomach).Thefeeding behavior is not closely related to its reproductive activity and the digestive organ is found to beadapted to its euryphagy.It is attractive to carry out multiplication and culture of Sebastiscus marmora-tus in Dongshan Bay.