Comparative evaluation of reproductive performance and some egg quality parameters of black and white skinned snails.

摘要: One hundred sexually matured snails, fifty each of the black skinned and white ectotypes were used in evaluation reproductive performance egg quality traits a study that lasted for eighty-four days. The measured included clutch size (number eggs laid per clutch), incubation period (days) eggs, percent hatchability, mortality survivability, while evaluated weight length. Results obtained showed significant differences at different levels among parameters two snails studied. results mean sizes 5 4 respectively. Mean periods 25.8 days ectotype 22 ectotype. values hatchability 26.8 % 22.8 survivability 20 ecotype. 2.7 g 2.4 g, lengths 4.6 mm 4.2 Among parameters, length had very high difference (P