摘要
阐明了强壮箭虫营浮游动物食性，主要捕食桡足类。真刺唇角水蚤、双刺 唇角水蚤和小拟哲水蚤是它的主要捕食对象。强壮箭虫有同种相残的习性，但发生 频率不高。其消化道内的小颗粒硅藻和甲藻并非由它主动摄入。它在渤海的食物 组成四季都以桡足类为主，但捕食其中各种类的比例则有明显的季节变化。强壮箭 虫的摄食强度与水温呈负相关的趋势，在夏季水温高时最低，在冬季水温低时最 高，说明这个种的冬季世代具有典型喜冷性的生态特点。
Sagitta crassa is a zooplankton-eater mainly feeding on copepoda. .Labidocera euchaeta, Labidocera bipinnata and Paracalanus parvus comprise their main food species. Sagitta crassa are cannibalistic although the occurrence frequency of cannibalism is not high. Diatoms and dinoflagellates in the alimentary canal are not taken in intentionally by Sagitta crassa. Copepoda is the most important food group in the food composition of Sagitta crassa in four seasons, but there are remarkable changes in percentage of copepoda species consumed by Sagitta crassa. whose feeding intensity correlates negatively with water temperatures, in other words feeding intensity is lowest at high water temperature in summer and highest at low water temperature in winter. It has been shown that the winter generation of Sagitta crassa typically prefers cold
出处
《海洋科学》
CAS
CSCD
北大核心
1995年第6期38-42,共5页
Marine Sciences
基金
国家自然科学基金资助项目!39270541号
关键词
渤海
强壮箭虫
摄食
箭虫
Bohai Sea, sagital crassa, Feeding
