相关实验视频

Updated: Jun 5, 2025

Methods for Rearing the Parasitoid Ganaspis brasiliensis, a Promising Biological Control Agent for the Invasive Drosophila suzukii

Methods for Rearing the Parasitoid Ganaspis brasiliensis, a Promising Biological Control Agent for the Invasive Drosophila suzukii

Published on: June 2, 2022

孕产妇的身体大小会影响群体寄生虫的性别分配

Zane G Holditch¹, Claudia DiMartini¹, Karas Turcotte¹

¹Department of Biological Sciences, Northern Arizona University, Flagstaff, AZ, USA.

Journal of insect science (Online)

|December 11, 2024

概括

雌性体型大小显著影响寄生虫黄蜂的后代生产和性别比率. 较大的雌性产生更多的后代,但它们的性别分配受到精子的可用性限制,随着繁殖的继续,导致更多的雄性偏见.

科学领域:

* 进化生物学进化生物学
* 昆虫繁殖昆虫繁殖
* 行为生态学

背景情况:

*在黄蜂群 (黄蜂,,蜜蜂) 中,双双体性决定意味着雌性通过用储存的精子受精卵来控制后代的性别.
* 身体大小与生殖成功有关,影响性伴生体的产生和潜在的精子管理.
*了解体型如何影响女性的生殖策略,特别是性别分配,对于这些生物来说至关重要.

研究的目的:

* 为了研究雄性和雌性体型对寄生虫黄蜂Nasonia vitripennis的后代生产和性别分配的影响.
* 测试假设较大的雌性面临精子限制,影响它们的性别分配决定,特别是当与较小的雄性交配时.

主要方法:

* 分类了80只雄性和80只雌性Nasonia vitripennis成大小小的组.
* 创建了四个交配群:大雌性与大/小雄性,小雌性与大/小雄性.
*分析了雌性在12个宿主 (Sarcophaga bullata) 上产卵后的繁殖规模和后代的性别比率.

主要成果:

*与较小的雌性相比,较大的雌性产生了明显更多的后代和更高比例的雄性.
* 性比变得越来越偏向男性与更大的后代生产,表明更大的雌性精子枯竭.
*男性体型没有影响后代的性别分配,但对女性后代的生产有轻微的积极影响.

结论:

*女性体型是Nasonia vitripennis繁殖的一个关键因素,影响生育能力和性别分配.
* 精子枯竭显著限制了更大,更有生育能力的女性的性别分配,随着精子供应减少,导致男性偏差的性别比率.
*这项研究揭示了平分类昆虫体型,生育能力和性别分配策略之间的复杂相互作用.

关键词:

他们的生育能力.一个单双的平分体.最佳的最佳性最佳的最佳性性别比率的性别比率.

更多相关视频

Experimental Manipulation of Body Size to Estimate Morphological Scaling Relationships in Drosophila

Experimental Manipulation of Body Size to Estimate Morphological Scaling Relationships in Drosophila

Published on: October 1, 2011

Basic Methods for the Study of Reproductive Ecology of Fish in Aquaria

Basic Methods for the Study of Reproductive Ecology of Fish in Aquaria

Published on: July 20, 2017

相关概念视频

Energy Budgets

Energy Budgets

Organisms must balance energy intake with the energy required for growth, maintenance and reproduction. These trade-offs result in a variety of survivorship and reproductive strategies, including semelparity and iteroparity. Semelparous species, like annual plants, have only one reproductive episode in their lifetimes and consequently have short lifespans. Iteroparous species, by contrast, have many reproductive events during their lifetimes but have relatively few offspring. These two...

The Ratio of X Chromosome to Autosomes

The Ratio of X Chromosome to Autosomes

In most organisms, sex is determined by the ratio of X and Y chromosomes. However, in some organisms, such as Drosophila and C.elegans, sex is determined by the ratio of the number of X chromosomes to the number of sets of autosomes. The Y chromosome in Drosophila is active but does not determine sex. It contains genes responsible for the production of sperms in adult flies.
Normal male Drosophila has a ratio of one X chromosome to two sets of autosomes. In contrast, normal female...

Mate Choice

Mate Choice

Mate choice—the decision about whom to mate with—is a type of natural selection, since animals must reproduce to pass down their genes. Mate choice is also called intersexual selection because the behavior occurs between the sexes.

Inclusive Fitness

Inclusive Fitness

Most altruistic behavior—in which one animal helps another at a cost to themselves—occurs between relatives. Scientists think these altruistic behaviors evolved because they increase the inclusive fitness of the animal providing help.