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作 者 ：赵文,董双林

期 刊 ：生态学报 2002年 22卷 5期 页码：682~687

关键词：摄食率；细巧华哲水蚤；浮游植物；盐碱池塘；

Keywords:grazing rates, Sinocalanus tenellus, phytoplankton, saline-alkaline pond,

摘 要 ：利用常规显微镜直接计数法和叶绿素 a法研究了盐碱池塘细巧华哲水蚤 ( Sinocalanustenellus)对浮游藻类的原位摄食率及其影响因素。测得该水蚤对水柱浮游植物的滤水率为 1 .73～ 1 5 5 .1 6μl/ ( ind.· h) ,摄食率为 92～ 2 5 38cell/( ind.· h)或 0 .7～ 2 7.7ng C/ ( ind.· h)。两种方法测定的滤水率和摄食率基本相符 ( p>0 .5 ,t检验 )。该水蚤可有选择地滤食诸如小色球藻、光甲藻、绿裸藻 ,单生卵囊藻和小环藻等 ,其选择性指数分别为 0 .81、0 .75、0 .72、0 .6 1和 0 .35。不同光处理下细巧华哲水蚤的滤食率多数情况是无光时摄食率高。在本实验的条件下该水蚤在饥饿后的滤水率和摄食率与正常情况相比均显著降低 ( P<0 .0 1 ,t检验 )。

Abstract:A direct counting method and present/absence method (observed chlorophyll-a content of nature pond phytoplankton with and without addition of copepods) were used to estimate in situ grazing capacity of a brackish copepod Sinocalanus tenellus grazing on phytoplankton in saline-alkaline ponds located in Zhaodian Fish Farm (Latitude 37°17′N, Longitude 117°55′E), Gaoqing County, Shandong Province from 4 May to 7 May,1998, aimed to provide the scientific evidence for understanding of the features of energy flow...

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