这时，亚种群已经进化成不同的物种。
At this point the subpopulations have evolved into distinct species.
当冰川消退，分离的动植物种群再次接触。
When the glaciers retreated, the separated populations of plants and animals came into contact again.
这在导致整个鲑鱼种群灭绝的案例中最为明显。
This is most evident in cases where it results in the extinction of entire salmon populations.
这种群体内部的偏侧性不平衡对个体也有好处。
This imbalance of lateralization within populations may also have advantages for individuals.
世界上35种海马中大多数的种群数据都非常稀少。
Population data for most of the world's 35 seahorse species is sparse.
一般来说，大多数物种的亚种群之间都有一定的距离。
In general, the subpopulations of most species are separated from each other by some measurable distance.
对人类种群起源和分布的研究曾是基于考古和化石证据。
Study of the origins and distribution of human populations used to be based on archaeological and fossil evidence.
克雷布斯调查了加拿大育空地区含有野兔种群的试验田。
Krebs investigated experimental plots in Canada's Yukon territory that contained hare populations.
该软件在15分钟内处理好并生成了一张植物种群统计图。
The software completes its processing in under 15 minutes producing a plant population count map.
然而，到了1750年，猎人们也开始瞄准附近的海獭种群。
However, by 1750, hunters had also targeted nearby sea otter populations.
这位农学家确信用他的软件能得出接近精准的植物种群数量。
The agronomist is sure that he will obtain a near accurate count of plant population with his software.
在调节种群增长方面，它与捕食一起是最重要的密度制约因子。
Together with predation, it is the most important density-dependent factor in regulating population growth.
其次，地峡两侧紧密相关的鱼类种群似乎开始在基因上彼此分化。
Second, it appears that closely related populations of fishes on both sides of the isthmus are starting to genetically diverge from each other.
这些返祖性状提供了优势，并在种群中传播，有效地逆转了进化。
These atavistic traits provided an advantage and spread through the population, effectively reversing evolution.
当旅鼠的食物供应不足以维持种群时，一次特别的迁徙就开始了。
When the lemmings' food supply becomes too low to support the population, a singular migration commences.
当这种分离持续一段时间后，这两个种群能够沿着不同的轨迹进化。
When that separation lasts for a period of time, the two populations are able to evolve along different trajectories.
而且，一旦种群或环境发生变化，智商测试就不一定预测得那么准确。
Moreover, IQ tests do not necessarily predict so well once populations or situations change.
这不仅是对人类种群的研究，也是对非人类种群（包括病毒）的研究。
It's not only the study of human population, but the populations of non-human species, including viruses.
生态学家在研究野兔种群时发现，北美雪兔的生长周期大约为10年。
Ecologists studying hare populations have found that the North American snowshoe hare follows a roughly ten-year cycle.
正是在这些种群中，我们开始看到自然色彩的基因构成发生了真正的变化。
It's in these populations that we begin to see real changes in the genetic makeup of natural coloring.
事实上，大多数分析家认为某种环境退化是许多已灭绝鲑鱼种群消亡的根源。
Indeed, most analysts believe that some kind of environmental degradation underlies the demise of many extinct salmon populations.
这种辩护导致了一个过于草率的结论，即运动狩猎能产生更健康的动物种群。
This defense leads to the overly hasty conclusion that sport hunting produces a healthier population of animals.
然而，当旅鼠的食物供应变得太少而无法维持种群时，一次特别的迁徙就开始了。
However, when the lemmings' food supply becomes too low to support the population, a singular migration commences.
它是控制竞争种群规模的因素之一，在极端情况下，它可能导致一个竞争物种的灭绝。
It is one of the factors controlling the size of competing populations, and in extreme cases it may lead to the extinction of one of the competing species.
清除淤泥，发现鱼类产卵的砾石层，找到合适的鲑鱼种类来重建种群是一项艰巨的任务。
Removing the mud, uncovering gravel beds where fish spawn, and finding suitable salmon types to rebuild the population is a daunting task.
岛屿分离后，孤立的蜥蜴种群将成为独特的物种，同时也保留了它们祖先的生态适应能力。
After the islands separated, the isolated lizard populations would have become distinct species while also retaining their ancestors' niche adaptations.
这些鱼的后代很可能会像它们的父母一样，在同一地区捕食、生活，并与原来的种群分隔开来。
Offspring of these fish would likely behave like their parents and feed and live in the same area, keeping them separate from the original population.
首先，至少在大西洋和太平洋鱼类种群中观察到的一些酶的差异不是随机的，而是进化适应的结果。
First, at least some of the observed differences between the enzymes of the Atlantic and Pacific fish populations were not random, but were the result of evolutionary adaptation.
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