摘要
通过培育池设置不同水平进行大瓶螺养殖，测试结果表明：大瓶螺在长沙地区全年共产卵141d，有效繁殖期近4个月。平均每对亲螺年繁殖成螺、中螺、仔螺共870个，重3158g。水温20－30℃、饵料充足时，螺苗发育最快，38d达性成熟。成螺密度、性比及水草覆盖率对雌螺的产卵频数、产卵量及成螺生长速度均无显著影响。雌螺体重与其产卵频数、产卵量间分别存在着显著、极显著负相关，相关系数厂分别为－0．6714、－0．8131。雌螺体重与其产卵量间直线回归方程为：y＝8822－1．82x。近亲繁殖使得螺苗存活率有下降的趋势，生长速度有变慢的趋势，但影响不显著。
Breeding ecology of Ampullaria gigaJs in Changsha is reported in this paper. Ampullaria gigas propagated for 141 days per annum in Changsha and the average yield of one pair of mature Ampullaria gigas is 3 158 g per annum. Young Ampullaria gigas maturates afer developing for 38 days under water temperature 20 ~ 30 t with sufficient food. There's extremely great negative correlation between average weight and ova yield of Ampullaria gigas in certain phase with correlation r = - 0. 8131. The simple linear equation between gravity and ova yield of female AmPullaria ggh is y = 88. 22 - 1. 82x. lnbred will make survival percentage and growing velocity of young AmPullaria gigas decline.
出处
《浙江海洋学院学报（自然科学版）》
CAS
2000年第1期37-41,97,共6页
Journal of Zhejiang Ocean University(Natural Science Edition)
