保安湖扁担塘螺类生产力的研究 Ⅲ.长角涵螺的周年生产量
PRODUCTION OF GASTROPODS IN BIANDANTANG LAKE OF BAO'ANHU,Ⅲ. ANNUAL PRODUCTION OF ALOCINMA LONGICORNIS
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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,2.088g·m-2·a-1,0.103g·m-2·a-1;Allen 曲线法,2.122g·m-2·a-1, 0.106g·m-2·a-1;瞬时生长率法,2.273g·m-2a-1, 0.114g·m-2·a-1.对应的P/B系数为4.3,4.3,4.0.Abstract: The production of A. Longicornis in Lake Biandantang was calculated by three methods. The results are: 2.088g穖-2穉-1 of wet weight with shell or 0.103g穖-2穉-1 of dry weight shell-free by size-frequency method; 2.122g穖-2穉-1 of wet weight with shell or 0.1061g穖-2穉-1 of dry weight shell-free by Allen curve method; 2.273g穖-2穉-1 of wet weight with shell or 0.1137g穖-2穉-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.
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Keywords:
- Lake Biandantang /
- Gastropod /
- A. Longicornis /
- Production /
- P/B ratio
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