相关实验视频
Updated: Feb 6, 2026

13:03
Protocol for Mosquito Rearing A. gambiae
Published on: July 4, 2007
24.0K
本质上有弹性:管理的养殖不会侵蚀极端爱好鱼的生理化学容忍度
Bethany L Williams1,2, Lenin Arias Rodriguez3, Ingo Schlupp4,5
1Department of Biology, University of Missouri-St Louis, St Louis, MO, USA.
Biology letters
|February 4, 2026
概括
实验室培养的硫化物春季鱼Poecilia mexicana在18年内保持了对硫化 (H2S) 和缺氧的耐受性. 这表明,现场保护工作可以保护危鱼群的关键适应性.
科学领域:
- 进化生物学 进化生物学
- 保护遗传学 保护遗传学
- 环境毒理学环境毒理学
背景情况:
- 现场保护对危物种至关重要,但化可能会侵蚀适应性.
- 硫化物泉水鱼面临极端的硫化 (H2S) 和缺氧,这给实验室的维护带来了挑战.
- 了解囚禁种群的适应损失对于有效的保护策略至关重要.
研究的目的:
- 调查长期实验室养殖是否会降低硫化物春季鱼的H2S和缺氧耐受性.
- 评估化对Poecilia mexicana适应性特征的影响.
- 评估实验室养殖鱼类适用于ex situ保护计划的适用性.
主要方法:
- 野生捕获的Poecilia mexicana的H2S和缺氧耐受性与实验室长达18年的同物种相比较.
- 利用了来自硫化和非硫化息地的鱼类,包括洞穴居民群体.
- 在受控实验室环境中大约40代后评估的耐受性水平.
主要成果:
- 来自硫化息地的实验室培养的P. mexicana保留了显著的H2S和低氧耐受性.
- 来自非硫化物洞穴 (源自硫化物祖先) 的鱼比表面生活的非硫化物鱼有更高的耐受性.
- 化并没有导致该物种丧失关键的环境容忍度.
结论:
- 像P. mexicana这样的硫化物春季鱼的现场保护可以成功地维持对极端条件的基本适应.
- 实验室库存的P. mexicana表现出对化影响的弹性关于H2S和低氧耐受性.
- 这些发现支持使用管理种群来保护适应挑战性环境的物种.
相关概念视频
Osmoregulation in Fishes
53.1K
When cells are placed in a hypotonic (low-salt) fluid, they can swell and burst. Meanwhile, cells in a hypertonic solution—with a higher salt concentration—can shrivel and die. How do fish cells avoid these gruesome fates in hypotonic freshwater or hypertonic seawater environments?
53.1K
What is Natural Selection?
129.5K
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.
129.5K
Nature and Nurture
22.4K
Many human characteristics, like height, are shaped by both nature—in other words, by our genes—and by nurture, or our environment. For example, chronic stress during childhood inhibits the production of growth hormones and consequently reduces bone growth and height. Scientists estimate that 70-90% of variation in height is due to genetic differences among individuals, and 10-30% of variation in height is due to differences in the environments that individuals experience,...
22.4K
Chirality in Nature
17.3K
Chirality is the most intriguing yet essential facet of nature, governing life’s biochemical processes and precision. It can be observed from a snail shell pattern in a macroscopic world to an amino acid, the minutest building block of life. Most of the snails around the world have right-coiled shells because of the intrinsic chirality in their genes. All the amino acids present in the human body exist in an enantiomerically pure state, except for glycine - the sole achiral amino acid.
17.3K
FISH - Fluorescent In-situ Hybridization
24.5K
Fluorescence in situ hybridization, or FISH, was developed in the early 1980s and has quickly become one of the most widely used techniques in cytogenetics. Labeled probes are used to bind complementary DNA or RNA sequences on a chromosome or in a region within a cell. Earlier, the probes could only be obtained by cloning or reverse transcription of a DNA template. Currently, the probe oligonucleotides can be synthesized synthetically. Additionally, with the advancement of optical techniques,...
24.5K
The Wave Nature of Light
61.5K
The nature of light has been a subject of inquiry since antiquity. In the seventeenth century, Isaac Newton performed experiments with lenses and prisms and was able to demonstrate that white light consists of the individual colors of the rainbow combined together. Newton explained his optics findings in terms of a "corpuscular" view of light, in which light was composed of streams of extremely tiny particles traveling at high speeds according to Newton's laws of motion.
61.5K

