EVOLUTION OF A BALANCED SEX-RATIO BY FREQUENCY-DEPENDENT SELECTION IN A FISH

被引：94

作者：

CONOVER, DO

VANVOORHEES, DA

机构：

[1] Marine Sciences Research Center, State University of New York, Stony Brook

来源：

SCIENCE | 1990年 / 250卷 / 4987期

关键词：

D O I：

10.1126/science.250.4987.1556

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Balanced (1 to 1) sex ratios are thought to evolve by a process known as frequency-dependent selection of the minority sex. Five populations of a fish with genetically based variation in temperature-dependent sex determination were maintained for 5 to 6 years in artificial constant-temperature environments that initially caused the sex ratio to be highly skewed. Increases in the proportion of the minority sex occurred in subsequent generations until a balanced sex ratio was established, thus confirming a central premise underlying the theory of sex-ratio evolution.

引用

页码：1556 / 1558

页数：3

共 20 条

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