期刊
ANIMAL BEHAVIOUR
卷 64, 期 -, 页码 23-32出版社
ACADEMIC PRESS LTD ELSEVIER SCIENCE LTD
DOI: 10.1006/anbe.2002.3034
关键词
-
Pollinating fig wasps are often used to study sex ratio evolution in structured mating populations. Theory predicts a female-biased sex ratio, becoming less female biased as female (foundress) density increases. We used Liporrhopalum tentacularis to test two mechanisms of sex-ratio control when foundresses oviposit simultaneously: (1) foundresses facultatively adjust the number,of males in clutches, and (2) they produce the same number of males regardless of clutch size, which, given limited numbers of oviposition sites, would lead to increases in sex ratio with increasing density. We then examined whether foundresses,can oviposit sequentially into figs. When oviposition was simultaneous, brood composition indicated facultative adjustment, although sex ratios were more female biased, than predicted. Instead, foundresses appeared to adjust their sex ratio in response to both others ovipositing and their own fecundity. We also found that foundresses are able to oviposit completely sequentially, with those arriving second adjusting their sex ratio in response to the previous oviposition. Hence, pollinating wasps may fail to fit, the predictions of classical sex ratio theory because the conditions under which foundresses oviposit, and their responses to changes in such conditions, are more complex than once assumed. (C) 2002 The Association for the Study of Animal Behaviour. Published by Elsevier Science Ltd. All rights reserved.
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