期刊
BEHAVIORAL ECOLOGY
卷 21, 期 6, 页码 1195-1202出版社
OXFORD UNIV PRESS INC
DOI: 10.1093/beheco/arq126
关键词
African cichlid; dishonest signaling; good genes models; lek; Nyassachromis microcephalus; sexual selection
资金
- Institute of International Education
- NSF
Complex signals present 2 outstanding questions: why do they exist and how are they interpreted? Multiple signals can be beneficial for the increased diversity or redundancy of information they convey; however, it is not clear how receivers use this additional information. I investigated a lekking Malawi cichlid fish that builds polymorphic bowers; some males build their sand spawning craters on rock platforms, rather than the sand floor, resulting in increased overall height and reduced construction, maintenance, and competition costs. This suggests that rock bowers are an unreliable signal of male investment. Using field observations and in situ bower manipulations I tested fitness costs, female preferences for bower type, bower height, and male displays, and mechanisms for the maintenance of bower polymorphism. In contrast to predictions, observational and experimental data confirmed that females were more likely to visit rock bowers but did not ultimately lay more eggs there. This indicates that females responded to potentially deceptive rock bower males by advancing to the next stage of courtship but were not ultimately fooled by these deceptive signals. Assessing additional signals during the next courtship stage may allow females to counteract initial sensory exploitation or females may be intentionally increasing their investment in mate assessment in response to deceptive signals. Male bower polymorphism may be maintained by the limited availability of rock platforms; there was no evidence for significant variation in individual female preferences or male bower-building strategies.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据