摘要
１９９６—１９９７年对扁担塘螺类优势种之一铜锈环棱螺进行了周年研究，结果表明其种群含四个年龄组，其中１９９６年组生长最快，其带壳湿重瞬时生长率为４．１５，去壳干重瞬时生长率为３．４０。采用瞬时生长率法测算其周年生产量为：带壳湿重，１５．７７ｇ·ｍ－２·ａ－１；去壳干重，０．８６２４ｇ·ｍ－２·ａ－１。Ｐ／Ｂ系数基本一致，分别为０．５０，０．５１。铜锈环棱螺的生产量的去壳干重（Ｗｄ，ｇ·ｍ－２·ａ－１）和带壳湿重（Ｗｗ，ｇ·ｍ－２·ａ－１）满足下列关系：Ｗｗ＝１７．２０Ｗｄ。
An investigation on one of the dominant species of gastropods, Bellamyaaeruginosa in Lake Biandantang was carried out from April, 1996 to March,1997.The results showed that the population was composed of four year classes, amongwhich the 1996 year class grew most quickly, with instantaneous growth rate of wetweight 4.15 and that of dry weight (unshelled), 3.40. The annual production of theanimal calculated by instantaneous growth rate method was: wet weight 15771.9 mg.m-2. a-1;dry weight (unshelled), 862.4 mg. m-2. a-1. The corresponding annualP/B ratios were almost the same: 0.50, 0.51, respectively. Generaly, relationshipbetween wet weight (Ww, mg. m-2. a-1) and dry weight (Wd, mg. m-2. a-1) ofpreduction of Bellamya aeruginosa is expressed as: Ww = 17.20 Wd.
出处
《水生生物学报》
CAS
CSCD
北大核心
1999年第4期346-351,共6页
Acta Hydrobiologica Sinica
基金
国家自然科学基金!39600019和39430101
关键词
螺类
铜锈环棱螺
扁担塘
饵料
湖泊
Snail, Bellamya aeruginosa, Production, P/B ratio, Lake Biandantang
