文献类型：期刊文献

英文题名：Effects of Temperature, Salinity, pH, and Light on Filtering and Grazing Rates of a Calanoid Copepod (Schmackeria dubia)

作者：Li, Changling[1]; Luo, Xiaoxia[1]; Huang, Xianghu[1]; Gu, Binhe[1];李长玲[2];罗晓霞[3];黄翔鹄[3];古滨河[3];

机构：Guangdong Ocean Univ, Fishery Coll, Dept Aquaculture, Zhanjiang 524025, Guangdong, Peoples R China

年份：2008

卷号：8

起止页码：1219

外文期刊名：THESCIENTIFICWORLDJOURNAL

收录：SCI-EXPANDED(收录号：WOS:000261698000004)、、WOS

语种：英文

外文关键词：copepods; environmental factors; grazing; filtering

外文摘要：Calanoid copepods are key components of the marine food web and the food sources of many larval fishes and planktivores, and grazers of phytoplankton. Understanding the ranges of major environmental variables suitable for their growth is essential to maintain the balance between trophic links and resources protection. In this study, the effects of temperature, salinity, pH, and light intensity on the filtering and grazing rates of a herbivorous copepod (Schmackeria dubia) were conducted in several control experiments. Our results indicated that experimental animals grazed normally at water temperatures between 15 and 35 degrees C. The filtering and grazing rates increased by onefold at water temperatures 15 to 25 degrees C, with a peak at around 30 degrees C. S. dubia fed normally at salinity ranging 20 to 30 ppt, with significantly low filtering and grazing rates at salinity below 15 ppt and above 35 ppt. The filtering and grazing rates increased as pH increased, peaked at approximately 8.5, and then decreased substantially. Light intensity also displayed an important impact on the filtering and grazing rates. Filtering and grazing rates were high when light intensity was greater than 20 and less than 200 mu mol m(-2) s(-1). S. dubia nearly stopped feeding at low light intensity (less than 20 mu mol m(-2) s(-1)).