| 来源类型 | Monograph (IIASA Interim Report) |
| 规范类型 | 报告 |
| Size and the Not-So-Single Sex: Disentangling the Effects of Size and Budget on Sex Allocation in Hermaphrodites. | |
| Cadet C; Metz JAJ; Klinkhamer PGL | |
| 发表日期 | 2004 |
| 出版者 | IIASA, Laxenburg, Austria: IR-04-084 |
| 出版年 | 2004 |
| 语种 | 英语 |
| 摘要 | Sex allocation theory explains how size-related variations in male and female fitness may favor the evolution of size-dependent sex allocation in hermaphrodites. Although empirical studies show that sex allocation changes gradually with size in many species, theoretical studies tend to predict an abrupt sex reversal from one sex to the other, that is, single-sexed sequential hermaphrodites. We show that this discrepancy between data and theory collapses if one takes into account that size affects male and female fitness through distinct routes. Using the classification of budget (larger individuals spend a greater budget on reproduction) and direct (e.g., larger plants are taller and may disperse pollen more efficiently) effects of size suggested by Klinkhamer et al., we propose a simple general framework appropriately incorporating these two categories of size effects in male and female fitness expressions. Analytical and numerical results show that a gradual sex change is evolutionarily stable for a large set of parameter values. Sex reversal is selected only in the absence of budget effects of size. We provide further predictions on size-dependent sex allocation and assess the relative importance of budget and direct effect for creating different patterns. |
| 主题 | Adaptive Dynamics Network (ADN) |
| 关键词 | Sex allocation Simultaneous hermaphroditism Sequential hermaphroditism Sex change Size |
| URL | http://pure.iiasa.ac.at/id/eprint/7366/ |
| 来源智库 | International Institute for Applied Systems Analysis (Austria) |
| 资源类型 | 智库出版物 |
| 条目标识符 | http://119.78.100.153/handle/2XGU8XDN/125292 |
| 推荐引用方式 GB/T 7714 | Cadet C,Metz JAJ,Klinkhamer PGL. Size and the Not-So-Single Sex: Disentangling the Effects of Size and Budget on Sex Allocation in Hermaphrodites.. 2004. |
| 条目包含的文件 | ||||||
| 文件名称/大小 | 资源类型 | 版本类型 | 开放类型 | 使用许可 | ||
| IR-04-084.pdf（433KB） | 智库出版物 | 限制开放 | CC BY-NC-SA | 浏览 | ||
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