學術資源整合系統-相關推薦

 
作者Yeh, Chien-Wei;Blamires, Sean J.;Liao, Chen-Pan;Tso, I-Min
出版日期201504
著作名稱Top down and bottom up selection drives variations in frequency and form of a visual signal
刊名Scientific Reports
5
頁數9543
被收錄索引SCI
主題動物
摘要The frequency and form of visual signals can be shaped by selection from predators, prey or both. When a signal simultaneously attracts predators and prey, selection may favour a strategy that minimizes risks while attracting prey. Accordingly, varying the frequency and form of the silken decorations added to their web may be a way that Argiope spiders minimize predation while attracting prey. Nonetheless, the role of extraneous factors renders the influences of top down and bottom up selection on decoration frequency and form variation difficult to discern. Here we used dummy spiders and decorations to simulate four possible strategies that the spider Argiope aemula may choose and measured the prey and predator attraction consequences for each in the field. The strategy of decorating at a high frequency with a variable form attracted the most prey, while that of decorating at a high frequency with a fixed form attracted the most predators. These results suggest that mitigating the cost of attracting predators while maintaining prey attraction drives the use of variation in decoration form by many Argiope spp. when decorating frequently. Our study highlights the importance of considering top-down and bottom up selection pressure when devising evolutionary ecology experiments.
DOIhttps://doi.org/10.1038/srep09543
系統號NO000004927

Aug 20 2021 11:12:17
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