牙鲆仔鱼早期阶段的摄食能力  

Feeding ability of Paralichthys olivaceus during early development stage

作　　者：龚小玲[1] 鲍宝龙[1] 姜秀凤[2] 苏锦祥[1] 段晓英[2] 

机构地区：[1]上海水产大学渔业学院,上海200090 [2]中国水产科学研究院北戴河中心实验站,河北北戴河066100

出　　处：《水产学报》2000年第6期516-521,共6页Journal of Fisheries of China

基　　金：国家自然科学基金资助项目!(39470556)

摘　　要：本文主要在实际观察值的基础上，利用发育反应方程Ｃ＝ＫＷＹ与功能反应Ｈｏｌｌｉｎｇ、Ｉｖｌｅｖ方程对２～１０日龄的牙鲆仔鱼的摄食能力进行了计算与预测。其结果表明：牙鲆仔鱼在２～６日龄、轮虫饵料密度不超过３０００ｉｎｄ· Ｌ－１的水体中，摄食强度不超过 １７ μｇ· ｈ－１；随着日龄的增加，摄食强度迅速增强，在 ４、６、 １０日龄、饵料密度为３０００ｉｎｄ·Ｌ－１的水体中，摄食强度分别是１．３５、１．６８、３．８９μｇ·ｈ－１。牙鲆仔鱼的摄食发生率随仔鱼的发育而加大，仔鱼在 ２日龄、饵料密度为 １５ ０００ ｉｎｄ·Ｌ－１的水体中，其摄食发生率仅为 ０．６９μｇ·ｈ－１，而在 １０．４日龄时，同饵料密度下的摄食发生率为１８．７２ μｇ·ｈ－１，后者是前者的２７倍。食饵操纵时间、饵料搜寻时间随仔鱼的发育而迅速下降：仔鱼在２、１０．４日龄的食饵操纵时间分别为０．４８５、０．０４０ ｈ．μｇ－１，前者是后者的 １２倍多，而在饵料密度为 １５ ０００ ｉｎｄ·Ｌ－１下，搜寻时间分别为 １４４９、００５３ ｈ．μｇ－１，前者又是后者的 ２７倍多，亦即是说，仔鱼在初孵前几天的摄食能力较低，到后期逐步提高。Through the development response C = KWy and function response Holling, Iviev equation counted and predicted the feeding ability of 2 - 10 age in days of Paralichthys olivaceus larvae. The result showed: the feeding intensities were not more than 1 .7 μg·h-1 at prey rotifer density level no more than 3000ind·L-1. The feeding intensities increased rapidly with the age increasing, at 4 .6 10 age in days and 3 000ind· L-1 food density level, the feeding intensities were 1. 35、 1 .68 .3. 89μg·h-1 respectively. The feeding occurrence rate increased with the larvae development, at 2 age in days. 15000ind· L-1 food density level, the feeding occurrence rate(μg. h-1 )was only 0.69,but at the 10.4 age in days.15 000ind·L-1 food density level, the feeding occurrence rate was 18.72 μg·h-l, the later's was 27 times of the former' s. Prey handing times and searching times decreased rapidly with the larvae developing, at the 2 and 10. 4 age in days, prey handing times were 0. 485 and 0. 040h·μg-1 respectively, the former's was mole than 12 times of the later' s, but at the 15000ind·L-1 prey density level, 2 and 10.4 age in days, the searching times were 1 .449 and 0.053h·μg-1 respectively, the former's as more than 27 times of the later' s, that indicated the feeding abilities were lower at the early days of first feeding, and then increased gradually.

关 键 词：牙鲆 仔鱼 摄食能力 发育反应 功能反应 

分 类 号：Q959.468[生物学—动物学] S965.399[农业科学—水产养殖]