相关实验视频

Updated: Jun 24, 2025

Protocol for Assessing the Relative Effects of Environment and Genetics on Antler and Body Growth for a Long-lived Cervid

Protocol for Assessing the Relative Effects of Environment and Genetics on Antler and Body Growth for a Long-lived Cervid

Published on: August 8, 2017

秋冬收获分布的长期变化在子物种,月份和亚种群之间有所不同

Bram H F Verheijen¹, Elisabeth B Webb², Michael G Brasher³

¹Missouri Cooperative Fish and Wildlife Research Unit, School of Natural Resources University of Missouri Columbia Missouri USA.

Ecology and evolution

|June 4, 2024

概括

种群正在改变它们的范围. 蓝翼鱼向西和南移动,而鱼和北方鱼向东和北移动. 这些复杂的变化影响了保护工作.

科学领域:

鸟类学鸟类学是一门学科.
野生动物生态生态学
保护生物学保护生物学

背景情况:

了解迁徙鸟类分布的长期变化对于有效的保护至关重要.
(蓝翼,,北半尾) 是北美重要的猎物物种.

研究的目的:

描述从1960-2019年到2019年,在中央和密西西比州的飞道中,三种幼物种的秋季和冬季收获分布的变化.
评估这些分布变化的跨月和亚种群的跨年和内属变化.

主要方法:

利用了北美中部和密西西比州飞道上的1960-2019年的带恢复数据.
采用核密度估计器计算10个分布指标,纠正狩猎季节的变化.
分析了按月 (十月至1月) 和每个物种的三个地理上不同的亚群的变化.

主要成果:

带回收分布发生了显著的转变:蓝翼青的西向和南向,黑的东向和北向和北半尾.
核心 (50%) 和广泛 (95%) 分布的重叠减少,而相对面积与1960-1979年基线相比增加.
分布变化因月份而异,在毛子群中变化很大,但在蓝翼青和北半尾中变化较小.

结论:

虽然冬季的分布显示出朝北的趋势,但具体情况因物种和亚种群而异,这使得概括变得复杂.
复杂的,细微的分布模式可以被广泛的摘要掩盖,突出需要详细分析.
了解这些长期分布变化对于识别驱动因素,管理息地和集中保护工作至关重要.

关键词:

它们是Anatidae的动物.在秋天,秋天,秋天.带恢复带的恢复分销销售分销销售销售销售一个子,一个子,一个子.收获收获的收获时间没有繁殖的非繁殖.这些子群体是分群体.水上鸟类水上鸟类冬天的冬天冬天的冬天冬天的冬天

更多相关视频

Resurrection of Dormant Daphnia magna: Protocol and Applications

Resurrection of Dormant Daphnia magna: Protocol and Applications

Published on: January 19, 2018

Visually Sexing Loggerhead Shrike Lanius Ludovicianus Using Plumage Coloration and Pattern

Visually Sexing Loggerhead Shrike Lanius Ludovicianus Using Plumage Coloration and Pattern

Published on: March 8, 2020

相关概念视频

Conservation of Declining Populations

Conservation of Declining Populations

Conservation of declining population focuses on ways of detecting, diagnosing, and halting a population decline. The approach uses methods to prevent populations from going extinct.

Types of Selection

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...

Threats to Biodiversity

Threats to Biodiversity

There have been five major extinction events throughout geological history, resulting in the elimination of biodiversity, followed by a rebound of species that adapted to the new conditions. In the current geological epoch, the Holocene, there is a sixth extinction event in progress. This mass extinction has been attributed to human activities and is thus provisionally called the Anthropocene. In 2019 the human population reached 7.7 billion people and is projected to comprise 10 billion by...

Migration

Migration

Migration is long-range, seasonal movement from one region or habitat to another. This common strategy, carried out by many different organisms around the world, is an adaptive response that typically corresponds to changes in an organism’s environment, like resource availability or climate. Migrations can involve huge groups of thousands of animals as well as single individuals traveling alone and can range from thousands of kilometers to just a few hundred meters.

Predator-Prey Interactions

Predator-Prey Interactions

Predators consume prey for energy. Predators that acquire prey and prey that avoid predation both increase their chances of survival and reproduction (i.e., fitness). Routine predator-prey interactions elicit mutual adaptations that improve predator offenses, such as claws, teeth, and speed, as well as prey defenses, including crypsis, aposematism, and mimicry. Thus, predator-prey interactions resemble an evolutionary arms race.