A study of the importance of fertilization period for maternal manipulation of offspring traits

受精期对母体操纵后代性状重要性的研究

• 批准号: 23570020
• 负责人: KARINO KENJI
• 金额: $ 3.41万
• 依托单位: Tokyo Gakugei University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2011
• 资助国家: 日本
• 起止时间: 2011 至 2013
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-23570020/
• 关键词: 産子調節; 受精時期; 性淘汰; 配偶者選択; 行動生態学; 卵胎生; グッピー; 受精

Female guppies Poecilia reticulata, a live-bearing fish, are known to adjust the number of offspring according to the attractiveness of their mates. In this study, I tested a hypothesis that females may adjust the number of offspring by manipulating fertilization period of eggs. Results of this study indicated that females fertilized their eggs immediately after mating with males, when the males were preferred by the females in female preference test. On the other hand, some females did not fertilize eggs even 22 days after mating. These females held many ripe eggs according to the extent of sexual ornamentation of their mates. These results suggest that female guppies may manipulate fertilization period and the number of ripe eggs until fertilization depending on the attractiveness of their mates.

雌性孔雀鱼 Poecilia reticulata 是一种活鱼，它会根据配偶的吸引力来调整后代的数量。在这项研究中，我测试了一个假设，即雌性可以通过操纵卵子的受精期来调整后代的数量。这项研究的结果表明，当雌性偏好测试中雌性更喜欢雄性时，雌性在与雄性交配后立即使卵子受精。另一方面，有些雌性即使在交配后22天也没有使卵子受精。根据其配偶性装饰的程度，这些雌性会产下许多成熟的卵。这些结果表明，雌性孔雀鱼可能会根据其配偶的吸引力来操纵受精期和受精前成熟卵的数量。

项目成果

Variation in female guppy preference for male olfactory and visual traits

雌性孔雀鱼对雄性嗅觉和视觉特征的偏好变化

• DOI: 10.1007/s10164-014-0402-8
• 发表时间: 2014
• 影响因子: 0.9
• 作者: Aya Sato; Naoko Ozawa; Kenji Karino
• 通讯作者: Kenji Karino

Negative correlation between male ornament size and female preference intensity in a wild guppy population

野生孔雀鱼种群中雄性装饰品大小与雌性偏好强度之间的负相关

• DOI: 10.1007/s00265-013-1600-z
• 发表时间: 2013
• 影响因子: 2.3
• 作者: Hiromi Kudo; Kenji Karino
• 通讯作者: Kenji Karino