摘要
采用三种方法对扁担塘长角涵螺的周年生产量进行了测算 ,结果表明 ,三种方法得到的生产量及P/B系数吻合较好。生产量的带壳湿重和去壳干重分别是 :体长频率法 ,2 .0 88g·m 2 ·a 1 ,0 .1 0 3g·m 2 ·a 1 ;Allen曲线法 ,2 .1 2 2g·m 2 ·a 1 ,0 .1 0 6g·m 2 ·a 1 ;瞬时生长率法 ,2 .2 73g·m 2 ·a 1 ,0 .1 1 4g·m 2 ·a 1 。对应的P/B系数为 4.3 ,4.3 ,4.0。
The production of A.Longicornis in Lake Biandantang was calculated by three methods. The results are: 2.088 g·m -2·a -1 of wet weight with shell or 0.103 g·m -2·a -1 of dry weight shell-free by size-frequency method; 2.122 g·m -2·a -1 of wet weight with shell or 0.1061 g·m -2·a -1 of dry weight shell-free by Allen curve method; 2.273 g·m -2·a -1 of wet weight with shell or 0.1137 g· m -2·a -1 of dry weight shell-free by instantaneous growth method. The corresponding P/B ratio are 4.3, 4.3, 4.0, respectively. Therefore, the results by the three methods are coincided with one another, which might be of great significance in estimation of macro-invertebrate production.
出处
《水生生物学报》
CAS
CSCD
北大核心
2002年第4期322-326,共5页
Acta Hydrobiologica Sinica
基金
国家自然科学基金 ( 394 30 1 0 1和 396 0 0 0 1 9)
华中科技大学人才引进基金资助
关键词
扁担塘
螺类
长角涵螺
生产力
P/B系数
Lake Biandantang
Gastropod
A. Longicornis
Production
P/B ratio
