相关实验视频

Updated: Jun 29, 2025

Assessing Differences in Sperm Competitive Ability in Drosophila
09:34

Assessing Differences in Sperm Competitive Ability in Drosophila

Published on: August 22, 2013

14.7K

女性之间的交配竞争:在昆虫中测试自然和性选择之间的区别

Varpu Pärssinen1, Leigh W Simmons2, Charlotta Kvarnemo1

  • 1Department of Biological and Environmental Sciences, University of Gothenburg, Gothenburg 40530, Sweden.

Royal Society open science
|April 8, 2024
PubMed
概括

竞争交配的雌性野从婚礼礼物和额外的交配中受益,增加了卵产量. 消费精子体礼物显著增加了卵子数量,突出了在交配竞争中的自然和性选择.

关键词:
多个交配的多重交配.自然选择自然选择多夫多妻制是什么意思 多夫多妻制是什么意思性选择性选择性选择这是一种精子体.

更多相关视频

Observation and Quantification of Mating Behavior in the Pinewood Nematode, Bursaphelenchus xylophilus09:55

Observation and Quantification of Mating Behavior in the Pinewood Nematode, Bursaphelenchus xylophilus

Published on: December 25, 2016

9.4K
Dyeing Insects for Behavioral Assays: the Mating Behavior of Anesthetized Drosophila06:13

Dyeing Insects for Behavioral Assays: the Mating Behavior of Anesthetized Drosophila

Published on: April 22, 2015

9.9K

相关概念视频

Natural Selection and Mating Preferences01:06

Natural Selection and Mating Preferences

The principle of natural selection posits that organisms better adapted to their environment are more likely to survive and reproduce. This principle is closely intertwined with mating preferences, a key aspect of sexual selection, which evolutionary psychologists believe is driven by instincts to propagate one's genes. Such instincts significantly influence mating behaviors and preferences between genders.
Females, due to their biological roles in conception, pregnancy, and nursing,...
101
Mate Choice01:20

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.
8.0K
Types of Selection01:46

Types of Selection

Natural selection influences the frequencies of particular alleles and phenotypes within populations in several different ways. Primarily, natural selection can be directional, stabilizing, or disruptive. Directional selection favors one extreme trait and shifts the population towards that phenotype while selecting against individuals displaying alternate traits. Stabilizing selection favors an intermediate trait with a narrow range of variation. Deviation from the optimal phenotype towards an...
40.4K
What is Natural Selection?01:32

What is Natural Selection?

Natural selection is an evolutionary process in which individuals with survival-promoting traits reproduce at higher rates. These favorable traits become more common within a population or species. Naturally selected traits initially arise via random genetic mutations. In order for selection to occur, there must be variation within a population, the trait controlling the variation must be heritable, and there must be an evolutionary advantage for variation in the trait.
115.1K
Frequency-dependent Selection01:21

Frequency-dependent Selection

When the fitness of a trait is influenced by how common it is (i.e., its frequency) relative to different traits within a population, this is referred to as frequency-dependent selection. Frequency-dependent selection may occur between species or within a single species. This type of selection can either be positive—with more common phenotypes having higher fitness—or negative, with rarer phenotypes conferring increased fitness.
22.0K
Competition02:34

Competition

When organisms require the same limited resources within an environment, they may have to compete for them. Competition is a net-negative interaction. Even if two competing individuals or populations do not interact directly, the overall fitness of both competitors is lowered as a result of not having full access to the limited resource.
21.5K