Active female courtship behavior and male nutritional contribution to female fecundity in Bruchidius dorsalis (Fahraeus) (Coleoptera: Bruchidae)
Active female courtship behavior and male nutritional contribution to female fecundity in Bruchidius dorsalis (Fahraeus) (Coleoptera: Bruchidae)
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DOI：
10.1007/s101440050031
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发表时间：
1999-12
期刊：
影响因子：
--
通讯作者：
K. Takakura
中科院分区：
文献类型：
--
作者：
K. Takakura
研究了豆象Bruchidius dorsalis(Fahraeus)(鞘翅目：Bruchidae)的交配行为和雄性对雌性生殖力的贡献，并与另两种豆象--中国豆象(Callsobruchus Chinensis)和以野生豆类为食的锐齿象(Kytorhinus Sharpianus)进行了比较。只有B级的女性。背部表现出多次交配和特征的交配前行为，似乎要求雄性的营养分泌。相反，其他两个物种的所有雌性都没有交配繁殖，也没有表现出这种交配前的行为。INB。在背部，交配后雄性体重的减少表明，大约相当于雄性体重7%的精液转移到雌性身上。交配过10次的雌性交配的繁殖力是只交配过一次的雌性的8倍以上，这表明雄性承担了产卵的大部分营养成本。这些事实表明，INB的性别角色颠倒了。多萨利斯。
Mating behavior and the male's contribution to female fecundity were studied in the bean weevilBruchidius dorsalis(Fahraeus) (Coleoptera: Bruchidae) in comparison with two other species,Callosobruchus chinensis(which infests stored beans) andKytorhinus sharpianus(which feeds on wild legumes). Only females ofB. dorsalisshowed multiple mating and characteristic precopulatory behavior that appeared to solicit the male's nutritious secretion. In contrast, all females of the other two species did not copulate multiply and did not show such precopulatory behavior. InB. dorsalis, the decrement of male body weight just after copulation indicated that seminal fluid weighing as much as approximately 7% of the male's body weight was transferred to the female. Fecundity was more than eight times higher in females that had copulated ten times than in females that had copulated only once, indicating that males paid most of the nutritional cost of egg production. These facts suggest that the sex role is reversed inB. dorsalis.