扁担塘螺类生产力的研究Ⅱ.纹沼螺的周年生产量
PRODUCTION OF GASTROPODS IN LAKE BIANDANTANG Ⅱ.ANNUAL PRODUCTION OF PARAFOSSARULUS STRIATULUS
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摘要: 采用四种方法对扁担塘纹沼螺的周年生产量进行了测算,结果表明,四种方法得到的生产量吻合极好.生产量的去壳干重和带壳湿重分别是:体长频度法,178.07mg·m-2·a-1,4998.40mg·m-2·a-1;减员累计法,174.50mg·m-2·a-1,4898.20mg·m-2·a-1;Allen曲线法,17450mg·m-2·a-1,4898.20m-2·a-1;瞬时生长率法,178.14mg·m-2·a-1,5000.40mg·m-2·a-1.对应的P/B系数分别为4.3,4.4,4.4,4.5.Abstract: The production of Parafossarulus striatulus in Lake Biandantang was calculated by using four method.The results were:178.07 mg穖-2穉-1 of dry weight shell free or 4998.40 mg穖-2穉-1 of wet weight with shell by size-frequency method;174.5 mg穖-2穉-1 of dry weight shell free or 4898.20 mg穖-2穉-1 of wet weight with shell by removal summation method;174.5 mg穖-2穉-1 of dry weight shell free or 4898.20 mg穖-2穉-1 of wet weight with shell by Allen curve method;178.14 mg穖-2穉-1 of dry weight shell free or 5000.40 mg穖-2穉-1 of wet weight with shell by instantaneous growth method.The corresponding P/B ratios are 4.3,4.4,4.4,4.5, respectively. Therefore,the results by the four methods are in well agreement,which might be of great significance in the estimation of invertebrate production.
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Keywords:
- Lake Biandantang /
- Gastropods /
- Parafossarulus striatulus /
- Production /
- P/B ratio
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