相关实验视频

Updated: Jun 28, 2026

Measuring Active and Passive Tameness Separately in Mice
07:13

Measuring Active and Passive Tameness Separately in Mice

Published on: August 10, 2018

性选择,温度,还有狮子的毛

Peyton M West1, Craig Packer

  • 1Department of Ecology, Evolution and Behavior, University of Minnesota, 1987 Upper Buford Circle, St. Paul, MN 55108, USA. west0302@umn.edu

Science (New York, N.Y.)
|August 24, 2002
PubMed
概括

非洲狮子 (Panthera leo) 的毛表明男性的健康状况,并对温度做出反应. 较深的,较长的毛皮有利于繁殖,但会导致热应激,这表明适应气候变化.

更多相关视频

Sampling and Analysis of Animal Scent Signals14:59

Sampling and Analysis of Animal Scent Signals

Published on: February 13, 2021

Using a Thermal Camera to Measure Heat Loss Through Bird Feather Coats04:55

Using a Thermal Camera to Measure Heat Loss Through Bird Feather Coats

Published on: June 17, 2020

相关概念视频

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.
Parental Care00:55

Parental Care

Many animals exhibit parental care behavior, including feeding, grooming, and protecting young offspring. Parental care is universal in mammals and birds, which often have young that are born relatively helpless. Several species of insects and fish, as well as some amphibians, also care for their young.
Inclusive Fitness00:57

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.
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.The Theory of Natural...
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...
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, inherently...