扁担塘两种底栖动物的周年生产量  

Annual production of two species of macrozoobenthos in Biandantang lake

作　　者：闫云君[1] 梁彦龄[2] 

机构地区：[1]华中科技大学生命科学与技术学院,湖北武汉430074 [2]中国科学院水生生物研究所,湖北武汉430072

出　　处：《华中科技大学学报（自然科学版）》2005年第6期117-119,共3页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目(30270278;39600019).

摘　　要：研究了1996年4月至1997年3月间扁担塘两种底栖动物———幽蚊和圆扁螺的周年生产量,采用体长频率法测算的生产量分别是:幽蚊周年生产量湿质量为0.1419g·m-2·a-1,干质量为0.0114g·m-2·a-1,P/B系数为1.8;圆扁螺的周年生产量带壳湿质量为1.6266g·m-2·a-1,去壳干质量为0.0732g·m-2·a-1,P/B系数为7.1.但与国外数据相比,这些结果比较适中,说明扁担塘并不是幽蚊和圆扁螺的最适生长环境.The secondary production of two species of macrozoobenthos, Chaoborus sp. and Hippeutis sp. in Biandantang (Day City, Hubei Province, China) was estimated with size-frequency method from April, 1996 to March, 1997. The results showed that the annual production of Chaoborus sp. was 0.1419g·m -2 ·a -1 of wet weight, 0.0114g·m -2 ·a -1 of dry weight; Hippeutis sp., 1.6266g·m -2 ·a -1 of wet weight with shell, 0.0732g·m -2 ·a -1 of dry weight with shell free. Their P/B ratios were 1.8 and 7.1, respectively. Actually, many macrozoobenthos communities in China were studied, but none of the above-mentioned species was reported. Therefore, this is the first time in China. But compared with the values published in the foreign countries, these values are moderate, suggesting that Biandantang is not the most suitable habitat for them to reproduce.

关 键 词：幽蚊 圆偏螺 生产量 扁担塘 

分 类 号：Q95-331[生物学—动物学]