自然种群最普遍的现象是其数量在时间和空间上的变异性。
One of the most universal phenomena of all natural populations is their variability in Numbers in space and time.
然而动物学家都清楚，实验提供的依据再多，最终也还是要看自然种群。
But as all zoologists know, experiments can only tell you so much. Eventually, you have to look at natural populations.
采用生命表的形式研究了三化性桑蟥自然种群数量动态规律。
The number dynamic law of natural racial group of the trivoltinism mulberry white caterpillar was studied Using life table.
目的了解广州市城区蚊虫自然种群幼虫的孳生地类型及种群分布特点。
Objective to find out the types of the breeding places of the mosquito larvae and the distribution characteristics of the natural mosquito population in urban area of Guangzhou.
通过组建斜纹夜蛾自然种群连续世代生命表，对斜纹夜蛾的种群动态进行了研究。
The this paper, the population dynamics of Spodoptera litura was studied by establishment of continuous generation life table of Spodoptera litura.
在田间种群研究阶段，主要进行种群聚集与扩散迁移的研究和自然种群的数量调查。
In the stage of field population study, most study focus on the congregation and immigration of insect population, the investigation of natural population quantity.
如果我们在野外，我们必须采取的这样的方式使自然种群的恢复和持续，一直持续到未来很长的时间里。
If we take from the wild we must do it in ways that allow natural populations to recover and last long into the future.
在自然种群中，个体往往分布不连续，从而形成或多或少的聚居点，相邻或邻近的聚居点之间有一定的个体交流。
In natural populations, individuals often are distributed more or less discontinuously to form numerous colonies, and individuals may be exchanged between adjacent or nearby colonies.
目的 掌握自然种群白纹伊蚊幼虫在广州地区的孳生分布特点，为白纹伊蚊自然种群变动的监测与控制提供依据。
Objective To realize the distribution characteristics of Aedes albopictus larva in Guangzhou, which is the basic for the surveillance and control of natural population of Ae. albopictus.
然后通过种群遗传分析，比较现有水杉人工种群与自然种群的遗传结构异同，探讨人工种群遗传结构是否得到恢复；
Secondly, I compared the genetic structure of artificial populations of M. glyptostroboides with the natural populations' and discuss the genetic consequence of the recovery.
组建了以作用因子为组分的夏季自然种群生命表，并运用排除作用控制指数法分析了各种因子对假茎象甲自然种群的作用。
The active factor life tables of BPW natural population were constructed. The controlling effect of active factors was evaluated by using exclusion index of population control (EIPC).
通过在洋白蜡和水曲柳等受害林地进行解剖调查，发现白蜡窄吉丁自然种群中幼虫的自然感病死亡率为6.3％，均为真菌感染，没有发现病原细菌和病毒感染致死的情况。
The results showed that there is 6.3% dead larvae caused by infection of pathogenic fungi in EAB nature population, no finding that of pathogenic bacteria or virus.
有一种假说认为，这是一种自然现象；在特别适合产卵的那几年后，刺冠海星自然会经历种群数量的波动。
One hypothesis is that it's a natural phenomenon, that the starfish naturally undergo population fluctuations following particularly good spawning years.
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.
但偶尔，大白鲨和其他种群会表演所谓的自然跳跃。
Occasionally however, great whites and some other species perform what is known as a natural breach.
在佛罗里达州建立一个混血种群是一种“妥协”，帕克说，这样作，可以近似地把生态系统恢复到它的自然状态。
Creating a hybrid in Florida is a "compromise," Parker says, that restores the ecosystem to something like its natural state.
波斯豹生活在中东。IUCN（国际自然保护联盟）称该物种的最大种群在伊朗和阿富汗。IUCN将波斯豹列为濒危物种。
Persian leopards are native to the Middle East. The largest populations are in Iran and Afghanistan, according to the IUCN. The organization lists the cats as endangered.
国际自然保护联盟警告，某些大猩猩种群正濒临灭绝。
Some gorilla species are close to extinction, warns the International Union for Conservation of Nature. Photograph: guardian.
但在自然界大多数种群中，很难判断遗传是否源于DNA序列改变或者表观基因变异。
But it's hard to tell in most natural populations whether inheritance is due to DNA sequence variation or epigenetic changes.
这是残存的卡克布种群的母群落，这也给自然资源保护主义者们另外一次恢复卡克布种群的机会。
It was the mother lode of the remaining kakapo population, and it provided conservationists with another opportunity to rehabilitate the species.
Stolzenburg说，很自然，科学家们非常关心老鼠对小海雀的种群数量造成的长期影响有多大。
Naturally, Stolzenburg says, scientists are concerned about the long-term impact the rats might have on the auklet population.
大熊猫自然繁殖的比率很低限制了种群的快速恢复，来自非法猎取，产地损失，还有其他人为因素影响死亡率。
The giant pandas' naturally slow breeding rate prevents a population from recovering quickly from illegal hunting, habitat loss, and other human-related causes of mortality.
这些自然和人为的特点似乎能增加种群的局部瓶颈和灭绝的频率。
Such natural and anthropogenic characteristics are likely to increase the frequency of local bottlenecks and extinctions.
由于细菌种群抗药性的增强，抗生素会随时间自然而然地失去它们的效力，因而需要持续研发新药来取而代之。
Antibiotics naturally lose their effectiveness over time as bacteria populations build up resistance, and new drugs need to be continually developed to take their place.
应用这些工具进行了自然界中华按蚊种群生命表的研究。
These tools were used to do study on life table of natural population of Anopheles sinensis.
大熊猫自然繁殖的比率很低限制了种群的快速恢复，来自非法猎取，产地损失，还有其他人为因素影响死亡率。
The giant pandas ' naturally slow breeding rate prevents a population from recovering quickly from illegal hunting, habitat loss, and other human - related causes of mortality.
大熊猫自然繁殖的比率很低限制了种群的快速恢复，来自非法猎取，产地损失，还有其他人为因素影响死亡率。
The giant pandas ' naturally slow breeding rate prevents a population from recovering quickly from illegal hunting, habitat loss, and other human - related causes of mortality.
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