摘要
研究了山东半岛南部鱼产卵场体长 2 .5～ 17.9mm的鱼仔、稚鱼的摄食。鱼仔、稚鱼主要饵料为原生动物的鼎形虫、单角铠甲虫、三角铠甲虫 ,小型桡足类的卵、桡足类的无节幼体和桡足幼体。桡足类种类为墨氏胸刺水蚤、小拟哲水蚤、克氏纺锤水蚤、双刺纺锤水蚤和拟长腹剑水蚤等小型桡足类。各种饵料所占的个数的百分比为 :鼎形虫 2 .2 % ,单角铠甲虫 7.6% ,三角铠甲虫 3.3% ,桡足类的卵 4 2 .2 % ,无节幼体 30 .4 %、桡足幼体 14.1%。鱼仔、稚鱼的摄食率为 16.2 %。摄食活动主要在白天 ,在水的中下层进行。由于摄食率低 ,肠道饱满度差 ,饥饿可能是引起鱼仔、稚鱼死亡的主要原因。
Studies on the feeding of anchovy (Engraulis japonnicus) post larva with a body length ranged from 2 5 mm to 17 9 mm and distributed in the spawning ground in the Southern waters of Shandong peninsula were conducted. As observed, the main feed categories of anchovy post larva are those protozoa like Peridintum sp., Caratium fusus, C. tripos and eggs, nauplius or copepodite larva of mini copepoda like Centropages mcmurrichi, Paracalanus parvus, Acartia clausi, A. bifilosa and Oithona similes. The percent of the main feed category is 2 2% for Peridintum sp., 7 6% for C. fusus, 3 3% for C. tripos , 42 2% for copepoda eggs, 30 4% for copepoda nauplius and 14 1% for copepodite. The feeding rate of the post larva is 16 2%. As a result, the feeding activities of anchovy post larva mainly take place in the daytime and in the middle to bottom layer. Due to the lower feeding rate, the gut fullness of the observed anchovy post larva is relatively low. Consequently, starvation may be the key factor caused the death of anchovy post larva.
出处
《海洋水产研究》
CSCD
2001年第2期21-25,共5页
Marine Fisheries Research
基金
国家重点基础研究发展规划 (973)项目 (G19990 4370 0 )资助
关键词
山东半岛南部
Ti鱼产卵场
Ti鱼仔
稚鱼
摄食行为
黄海
Spawning ground of anchovy in the Southern waters of Shandong peninsula Anchovy (Engraulis japonnicus) post larva Feeding
