鱼群在前往上游产卵的途中被捕获。
Fishes are caught when they are on the way upstream to lay eggs.
整个州都有生物学家在成年鱼出来产卵的时候持续监测着它们。
There are biologists throughout the state constantly monitoring adult fish as they show up to spawn.
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.
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.
证据只有产卵量大小和产卵的数量？
Based only on evidence of clutch volume size, the number of eggs?
这些有毒物质会限制毛毛虫的生长，减少雌蛾产卵的数量。
These noxious substances limit caterpillars' growth and reduce the number of eggs that female moths lay.
海龟产卵的狭长海滩一边受到开发的挤压，另一边受到海平面上升的威胁，因为海洋变暖。
The narrow strips of beach on which the turtles lay their eggs are being squeezed on one side by development and on the other by the threat of rising sea levels as the oceans warm.
通过观察青蒿琥酯对曼氏血吸虫雌虫产卵的影响，分析药物的抗生殖作用。
Study the anti-fecundity effect of artesunate against the schistosoma mansoni by observation and analysis of the parasite egg laying.
许多海洋鱼类是在淡水河里产卵的。
一个主要目的是保护产卵的鱼和幼鱼。
石油泄漏会威胁到红树林和产卵的鱼类
固定的问题，石头围栏是产卵的碎片。
从统计上来说，要找到鳗鱼产卵的地点概率非常低。
To get where eels are spawning, it's statistically very low probability.
但今年，从里海来伏尔加河产卵的鱼群数量减少了。
But this year, fewer fish are coming into the Volga delta from the Caspian Sea to spawn.
它们是世界上唯一的两种产卵的哺乳动物。
十九年后，塜本胜巳和米勒仍在海洋中研究产卵的鳗鱼。
Nineteen years later Tsukamoto and Miller are still searching the oceans for spawning eels.
每次产卵的数量是两个。父母鸽子照顾它们的蛋。
It lays two eggs each time. The parent pigeons look after their eggs.
温柔无法完成工作，除非你恰巧是一只产卵的母鸡。
Gentleness doesn't get work done unless you happen to be a hen laying eggs.
这样的空当就给了雌杜鹃自由选择巢穴产卵的机会。
Such leeway would make it easier for a female cuckoo to lay where she chose.
建堤坝来阻断河流，既阻挡了回流产卵的鱼，又阻碍了下游淤泥肥沃土壤。
Blocking a river with a dam blocks the movement both of fish upstream to spawn and of silt downstream to fertilise fields.
目前在温哥华附近的湖泊有两群产卵的红鲑，已经被列入濒危物种名录。
Two groups of sockeye that spawn in lakes near Vancouver are also listed as endangered.
一些鱼在成熟之前是不产卵的：在些之前逮住它们，就不需要担心下一年鱼籽的产量。
Some fish do not spawn until maturity: catch them before that and you've no baby fish produced for the next year.
变化：删除“夹”一所以他们包而不是产卵的野生部落每天晚上后49天。
Changed: Removed "clamp" on hordes so they wrap instead of spawning a feral horde every night after day 49.
很多渔民确信不少油污正悬浮在下潜水流中，这会影响到牡蛎养殖场，螃蟹的繁殖和产卵的鱼群。
Many fishermen are convinced that much of the oil is suspended in the water column or has drifted to the bottom, where it's impacting oyster beds, crab herds, and spawning fish schools.
系统排放的废水，最终返回到栖息地恢复现有溪流产卵的鲑鱼和其他野生动物的再利用。
Discharge water from the system charges a wetland for waterfowl and ultimately returns to an existing stream for spawning salmon and other wildlife habitat restoration.
本年度第二次产卵的可能性正在增大，但这会使得为勃艮第公爵蚬蝶安排住所的工作更加困难。
However, the increased likelihood of a second brood later in the year could make managing sites for Duke of Burgundy butterflies more difficult.
鱼，一些两栖类和原始的产卵的哺乳动物，如鸭嘴兽，使用类似的凹陷获得附近的动物产生的电场。
Fish, some amphibians and primitive egg-laying mammals such as the duck-billed platypus use similar pits to pick up electric fields generated by nearby animals.
在这项研究中，她和同事们根据抓到的虱卵数量估算虱子滋生的程度。他们认为，虱卵越多，说明产卵的虱子越多。
In this study, she and her colleagues estimated the degree of louse infestation by the number of nits picked. The more nits, they calculated, the more lice-producing nits.
在这项研究中，她和同事们根据抓到的虱卵数量估算虱子滋生的程度。他们认为，虱卵越多，说明产卵的虱子越多。
In this study, she and her colleagues estimated the degree of louse infestation by the number of nits picked. The more nits, they calculated, the more lice-producing nits.
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