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Brood size: a major factor influencing male dimorphism in the non-pollinating fig wasp Sycobia sp.

文献类型： 外文期刊

作者： Niu, Li-Ming 1 ; Hu, Hao-Yuan 1 ; Huang, Da-Wei 1 ; Fu, Yue-Guan 5 ; Peng, Zheng-Qiang 5 ;

作者机构： 1.Chinese Acad Sci, Inst Zool, Key Lab Zool Systemat & Evolut, Beijing, Peoples R China

2.Chinese Acad Sci, Grad Sch, Dept Biol, Beijing, Peoples R China

3.Anhui Normal Univ, Coll Life Sci, Dept Biol, Wuhu, Anhui, Peoples R China

4.Shandong Agr Univ, Coll Plant Protect, Dept Entomol, Tai An, Shandong, Peoples R China

5.Chinese Acad Trop Agr Sci, Inst Environm & Plant Protect, Minist Agr, Key Lab Monitoring & Control Trop Agr & Forest In, Danzhou, Hainan, Peoples R China

关键词： Alternative reproductive tactics;brood size;conditional strategy;male dimorphism;non-pollinating fig wasp

期刊名称：ECOLOGICAL ENTOMOLOGY （ 影响因子：2.465； 五年影响因子：2.604 ）

ISSN： 0307-6946

年卷期： 2009 年 34 卷 6 期

页码：

收录情况： SCI

摘要： Male polymorphisms have been described in some non-pollinating fig wasps, as well as in other animals. The proximal basis and the maintenance of alternative male reproductive strategies are either genetic or environmental. Here we studied male dimorphism in the non-pollinating fig wasp Sycobia sp. We conducted experimental manipulations to study the factors influencing offspring male morph allocations and explore a possible basis for the determination and maintenance of male dimorphism in Sycobia sp. The results showed that brood size was the major and underlying factor influencing the male morph ratio. When the brood size increases, the wingless male ratio also increases. Also, our results indicated that there was no direct maternal control on offspring male morph allocation. Male dimorphism in Sycobia sp. probably represents an environmentally determined conditional strategy, which responded to offspring population density at the level of the individual fig.

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[1]The occurrence of fig wasps in the fruits of female gynodioecious fig trees. Wu, Tao,Hu, Hao-Yuan,Niu, Li-Ming,Xiao, Jin-Hua,Feng, Gui,Huang, Da-Wei,Dunn, Derek W.,Wu, Tao,Pan, Xian-Li,Fu, Yue-Guan,Huang, Da-Wei.

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