摘要:

SUMMARY.Samples of the polymorphic snailCepaea nemoraliswere taken from a colony covering a small area, with an interval of 64 years between the collections. There have been some small, but statistically significant, changes in the relative abundance of certain shell varieties over that period, but the general picture is of a population showing a high degree of genetical stability. There is no evidence of differential predation by birds or rats.

ISSN:0370-0461    

DOI:10.1111/j.1095-8312.1958.tb00820.x

出版商:Blackwell Publishing Ltd    

年代:1958

数据来源: WILEY