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详细书目
| 文件类型: | 文章 |
|---|---|
| 所有的著者/提供者: | Stevan J Arnold |
| ISSN: | 0014-3820 |
| OCLC号码: | 478629016 |
| 语言注释: | English |
| 奖励: |
摘要:
An analysis of a slug-eating response by naive, newborn garter snakes provides a particularly clear example of geographic variation in behavior with a genetic basis. Feeding responses were recorded for three parental populations and their F<sub>1</sub> progeny: behaviors were scored in a total of 1,531 snakes. Populations that are sympatric with slugs show the highest incidence of slug-eating snakes (68-85%), while in an allopatric population the incidence is only 17%. Thus the geographic variation in this behavior is undoubtedly maintained by selection. The behavior is congenital and stable. Crosses between populations indicate at least partial dominance for slug-refusal but the number of loci involved is unknown. Reciprocal F<sub>1</sub> progeny show the same incidence of slug-eating (19-32%) and give no indication of maternal effects.
