相关实验视频

Updated: May 7, 2025

Reproductive Techniques for Ovarian Monitoring and Control in Amphibians
04:37

Reproductive Techniques for Ovarian Monitoring and Control in Amphibians

Published on: May 12, 2019

15.4K

发芽动力学,季节性和多体性:潜入新热带点腹青繁殖的潜水

Rafael O A Bordin1, Classius de Oliveira2, Raquel F Domeniconi1

  • 1Department of Structural and Functional Biology, Universidade Estadual Paulista "Júlio de Mesquita Filho", São Paulo, Brazil.

Anatomical record (Hoboken, N.J. : 2007)
|December 31, 2024
PubMed
概括

青Leptodactylus podicipinus的多性与降雨有关,并影响生殖周期. 这项研究揭示了多方体与非多方体物种中明显的游戏生成模式,突出了多方体的进化作用.

关键词:
莱普多达克提勒斯 (Leptodactylus podicipinus) 是一个脚动物.阿努拉·阿努拉 (Anura Anura) 是一个多夫多妻制是什么意思 多夫多妻制是什么意思生殖生殖的繁殖.测试 测试 测试 测试

更多相关视频

Standardizing a Non-Lethal Method for Characterizing the Reproductive Status and Larval Development of Freshwater Mussels Bivalvia: Unionida07:22

Standardizing a Non-Lethal Method for Characterizing the Reproductive Status and Larval Development of Freshwater Mussels Bivalvia: Unionida

Published on: October 4, 2019

7.6K
Analysis of Transforming Growth Factor ß Family Cleavage Products Secreted Into the Blastocoele of Xenopus laevis Embryos06:57

Analysis of Transforming Growth Factor ß Family Cleavage Products Secreted Into the Blastocoele of Xenopus laevis Embryos

Published on: July 21, 2021

2.4K

相关概念视频

Hybrid Zones02:29

Hybrid Zones

Hybrid zones are narrow regions where two closely related species interact, mate, and produce hybrids. Relative to either parent species, hybrids may possess distinct phenotypic or genetic differences that impact their survival and reproductive success. The genetic variances introduced by hybridization influence species diversity and speciation processes within the hybrid zone.
16.6K
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.
21.6K
Speciation Rates01:07

Speciation Rates

Overview
20.7K
Energy Budgets00:51

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...
9.0K
Background and Environment Affect Phenotype02:27

Background and Environment Affect Phenotype

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...
6.4K
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.
7.9K