不随机的交配行为在不同的沿海和海上三脊鱼之间,在上伯坦斯湖的入侵群体中
Tobias Zeidler1, Albert Ros1, Samuel Roch1
1Fisheries Research Station Baden-Württemberg, Argenweg 50/1, 88085 Langenargen, Germany.
Royal Society open science
|January 16, 2025
概括
康斯坦茨湖的入侵性鱼正在分为两个生态型. 行为实验显示,雌性拒绝来自另一种生态型的雄性,这表明正在出现的生殖隔离.
科学领域:
- 进化生物学 进化生物学
- 生态生态学 生态生态学
- 行为生态学 行为生态学
背景情况:
- 适应性分歧和遗传差异化可能导致生殖隔离.
- 康斯坦茨湖的入侵性三脊鱼 (Gasterosteus aculeatus) 正在多样化为沿海和海域生态类型.
- 这两种生态类型都在沿海地区筑巢,这表明有可能发生杂交.
研究的目的:
- 调查分类交配行为是否有助于分离的鱼生态型之间的繁殖隔离.
- 为了确定雌性是否根据生态型表现出伴侣选择,尽管可能与偏好的男性特征进行权衡.
主要方法:
- 进行了一项行为实验,女性在同一或不同生态型的巢守雄性之间进行选择.
- 通过记录的求爱行为和女性侵略水平来评估女性的选择.
- 收集了与伴侣选择相关的男性特征 (大小,颜色,侵略性) 的数据.
主要成果:
- 同样的或不同的生态型的男性和女性之间的求爱活力没有显著差异.
- 观察到一个显著的相互作用效应:沿海雌性对海性雄性表现出更多的攻击性,而海性雌性对沿海雄性表现出更多的攻击性.
- 这表明异生态型雄性被拒绝,即使沿海雄性具有普遍喜欢的特征 (体型更大,颜色更红,攻击性更高).
结论:
- 在这种侵入性鱼种群的早期分歧阶段,繁殖的行为障碍正在出现.
- 这些行为障碍,特别是女性对异生态型男性的侵略,可能在促进生殖隔离方面发挥作用.
- 这些发现有助于了解快速多样化的种群中的适应性辐射和特异化过程.
相关概念视频
01:06Fixed Action Patterns
15.8K
A fixed action pattern (FAP) is a specific, hard-wired sequence of behaviors that occurs in response to an external stimulus, called a sign stimulus. The behavior is “fixed” because it is essentially unchangeable—proceeding similarly across individuals of a species every time it occurs.
15.8K
01:07Speciation Rates
21.0K
Overview
21.0K
01:31Formation of Species
39.0K
Speciation describes the formation of one or more new species from one or sometimes multiple original species. The resulting species are discrete from the parent species, and barriers to reproduction will typically exist. There are two primary mechanisms, speciation with and without geographic isolation—allopatric and sympatric speciation, respectively.
39.0K
01:11Testing a Claim about Mean: Known Population SD
2.7K
A complete procedure of testing the hypothesis about a population mean is explained here.
Estimating a population mean requires the samples to be distributed normally. The data should be collected from the randomly selected samples having no sampling bias. The sample size needed to be higher than 30, and most importantly, the population standard deviation should be already known.
In most realistic situations, the population standard deviation is often unknown, but in rare circumstances, when it...
Estimating a population mean requires the samples to be distributed normally. The data should be collected from the randomly selected samples having no sampling bias. The sample size needed to be higher than 30, and most importantly, the population standard deviation should be already known.
In most realistic situations, the population standard deviation is often unknown, but in rare circumstances, when it...
2.7K
02:39Gene Flow
34.7K
Gene flow is the transfer of genes among populations, resulting from either the dispersal of gametes or from the migration of individuals.
34.7K
01:24Testing a Claim about Population Proportion
3.3K
A complete procedure for testing a claim about a population proportion is provided here.
There are two methods of testing a claim about a population proportion: (1) Using the sample proportion from the data where a binomial distribution is approximated to the normal distribution and (2) Using the binomial probabilities calculated from the data.
The first method uses normal distribution as an approximation to the binomial distribution. The requirements are as follows: sample size is large...
There are two methods of testing a claim about a population proportion: (1) Using the sample proportion from the data where a binomial distribution is approximated to the normal distribution and (2) Using the binomial probabilities calculated from the data.
The first method uses normal distribution as an approximation to the binomial distribution. The requirements are as follows: sample size is large...
3.3K