女性生殖液的度会影响外部肥料中的替代男性表型的精子性能
Livia Pinzoni1, Lisa Locatello2, Clelia Gasparini1
1Department of Biology, University of Padova, Padova, Italy.
Journal of evolutionary biology
|July 13, 2023
概括
女性生殖液 (FRF) 根据男性表型和FRF度不同影响精子性能. 较高的FRF度可以促进男性的领地和运动鞋精子,从而影响女性的神秘选择.
科学领域:
- 生殖生物学 生殖生物学
- 行为生态学 行为生态学
- 进化生物学 进化生物学
背景情况:
- 女性生殖液 (FRF) 影响精子的表现,影响神秘的女性选择.
- 在产卵期间,雄性与雌性之间的接近可能会导致FRF的差异性暴露.
- 不同的FRF度对不同表型的男性精子的影响尚不清楚.
研究的目的:
- 为了研究不同度的FRF如何影响领土和运动鞋男性草的精子运动.
- 为了确定FRF度是否与雄性生殖策略有关的交配后的性选择中介.
主要方法:
- 使用了草 (Zosterisessor ophiocephalus) 模型系统.
- 检查了精子运动性,以应对不同度的FRF.
- 对领土 (受青) 和运动鞋 (不受青) 雄性精子的影响进行比较.
主要成果:
- FRF显示出对精子运动的差异性度依赖作用,特别是在低度时.
- 在低FRF度下,精子性能在运动鞋和领地男性之间有所不同.
- 在高FRF度下,两种男性类型的精子性能同样得到改善.
结论:
- FRF度影响精子表现,影响因男性表型和接近女性而有所不同.
- 虽然领土雄性在释放卵子附近的精子方面具有优势,但FRF也可以在更近的距离上受益于运动鞋精子.
- 这表明FRF在雌性交配后的选择中发挥作用,允许根据不同空间条件下的精子表现来灵活选择伴侣.
相关概念视频
02:27Background and Environment Affect Phenotype
6.6K
Although the genetic makeup of an organism plays a major role in determining the phenotype, there are also several environmental factors, such as temperature, oxygen availability, presence of mutagens, that can alter an organism’s phenotype.
An example of how genetic background affects phenotype can be seen in horses. The Extension gene in horses is responsible for their coat color. A wild-type gene (EE) produces black pigment in the coat, while a mutant gene (ee) produces red pigment. A...
An example of how genetic background affects phenotype can be seen in horses. The Extension gene in horses is responsible for their coat color. A wild-type gene (EE) produces black pigment in the coat, while a mutant gene (ee) produces red pigment. A...
6.6K
01:41Spermatogenesis
102.7K
Spermatogenesis is the process by which haploid sperm cells are produced in the male testes. It starts with stem cells located close to the outer rim of seminiferous tubules. These spermatogonial stem cells divide asymmetrically to give rise to additional stem cells (meaning that these structures “self-renew”), as well as sperm progenitors, called spermatocytes. Importantly, this method of asymmetric mitotic division maintains a population of spermatogonial stem cells in the male...
102.7K
01:23Infertility in Males
298
Male infertility affects millions of couples worldwide, arising from various factors that impact different stages of the reproductive process. An endocrine imbalance resulting from conditions like hypogonadism, Klinefelter syndrome, or pituitary disorders can disrupt hormone levels and reduce sperm production. Testicular defects, such as tumors, cryptorchidism, atrophic testes, abnormal sperm morphology, and low sperm count or motility, may arise due to genetic factors, structural...
298
01:38Fertilization
71.2K
During fertilization, an egg and sperm cell fuse to create a new diploid structure. In humans, the process occurs once the egg has been released from the ovary, and travels into the fallopian tubes. The process requires several key steps: 1) sperm present in the genital tract must locate the egg; 2) once there, sperm need to release enzymes to help them burrow through the protective zona pellucida of the egg; and 3) the membranes of a single sperm cell and egg must fuse, with the sperm...
71.2K
01:22Sperm Structure and Semen Composition
2.9K
During ejaculation, males release around 2-5 milliliters of semen, which is a complex mixture of mature sperm and various fluids produced by accessory glands. The mature sperm cells measure approximately 60 micrometers in length and consist of a head, neck, midpiece, and tail. The head is flattened and tapered, measuring about 4 to 5 micrometers in length. It contains a nucleus with condensed chromosomes and an acrosome, a cap-like structure filled with enzymes essential for penetrating the...
2.9K
01:20Mate Choice
8.1K
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.
8.1K