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.
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.
雌蝴蝶在植物的叶片上产卵。
因为通常只有一只雌性在一个特定的幼虫中产卵，所以它只会产生一只雄性，因为这只雄性可以在孵化时使它所有的姐妹受精。
Since only one female usually lays eggs in a given larva, it would pay her to produce one male only, because this one male could fertilize all his sisters on emergence.
在相同温度下，产卵雌虫的发育时间比非产卵雌虫的长。
The development time of ovigerous females was longer than that of non-ovigerous females at same temperature.
这种光来自雌性萤火虫鱿鱼，它们在春天产卵，死后，被冲上海岸。它们的触须像数百万碧绿色LED灯似地闪亮。
The light comes from female firefly squid, which spawn in spring, then die and wash ashore, their tentacles lit like millions of aquamarine LEDs.
首先青蛙产卵，在池塘里，然后那些卵变成蝌蚪，然后蝌蚪变成更多的青蛙。
First, the frogs lay eggs, in a pond, and then the eggs turn into tadpoles and the tadpoles turn into more frogs.
斑点蝾螈于春天在池塘中产卵，并且胶囊状的卵呈绿色，这是因为藻类包围了这些胚胎。
Spotted salamanders lay their eggs in pools in spring. And the egg capsules actually look green, thanks to the algae that surrounds the resident embryos.
另外中国也是世界上二氧化硫排放最多的国家，由此产生的酸雨正在侵蚀韩国和日本的森林面积，甚至日本渔民也受到了中国环境污染问题引起的影响：大型海蜇在漂游到日本北部之前会先在中国沿海产卵，这破坏了大麻哈鱼和黄鱼的捕捉，渔网和轮桨也因此受损。
The country is also the world's biggest emitter of sulphur dioxide. The resulting acid rain is damaging Korean and Japanese forests.
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.
鸭嘴兽介于哺乳类与爬行类之间，因为它仍然具备许多爬行动物的特征，如产卵，而这些特征在我们身上已经消失了。
And that puts them somewhere between mammals and reptiles, because they still maintain quite a lot of reptilian characteristics that we've lost, for instance they still lay eggs.
但是最大的原因是在1837年由小石头和木材构建的爱德华兹水坝，它被用来水力发电，水坝阻拦了鱼群到达它们的产卵地。
But the biggest culprit was the Edwards Dam — a small stone-and-timber structure built in 1837 for hydropower generation that blocked the fish from reaching their spawning grounds.
有些在水坝上活动的鱼被安上了无线电标签，可以追踪查看它们是否返回出生地产卵。
Some fish are radio-tagged, moved above a dam, and tracked to find out if they return to their birthplaces to spawn.
他说，在每个交配季节，海龟们都会离开它们在肯尼迪机场边上湿地中的家园和成长地，前往附近的空旷的沙地产卵并将它们埋入沙中。
Every mating season, he says, the turtles leave their home and breeding ground in the salt marshes near JFK and take to the nearby sandy, open areas to lay their eggs and bury them in the ground.
鲑鱼在海中生活数年之后，在夏季洄游到它们的出生地，产卵然后死亡。在这一路上它们几乎不吃东西。
After being at sea for several years, salmon return in summer to the sites of their birth to spawn and die, and hardly feed along their final journey.
杜鹃有很好的理由去模仿鹰，由于莺和其它的小型鸟类在它们的巢中产卵，自然这些小型鸟类就很害怕鹰，并且对鹰敬而远之。
Cuckoos would have good reason to do so, since the warblers and other small birds in whose nests they lay their eggs are understandably frightened of hawks, and give them a wide berth.
虎凤蝶在美国的东部可以发现，这种蝴蝶通常每年产卵两到三次，这使它位列最多产的蝴蝶之一。
Found in the Eastern side of the US, this butterfly often produces two or three batches of eggs each year which puts it among the more fecund of butterflies.
瓢虫在树叶的背面成片或成排的产卵，通常也是蚜虫聚集的地方。
Ladybugs lay their eggs in clusters or rows on the underside of a leaf, usually where aphids have gathered.
被捕获的鱼的平均重量也在减小，这正是研究机构大为担忧的，尽管产卵鱼的总存量从1985年以来已略微增加。
The mean weight of fish caught is also dropping, which worries the research institute greatly, though the biomass of spawning stock has increased slightly since 1985.
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.
去年加利福尼亚和俄勒冈海域的大鳞大马哈鱼的绝迹也是如此，在产卵季节鱼群数量比2003年的峰值低88%。
So could the disappearance of Chinook salmon from the waters off California and Oregon last year; the population during the spawning season was 88% below its all-time high in 2003.
有些渔场在产卵季节被封闭（例如，为了鳕鱼产卵）；另一些鱼类孵化的渔场是永久禁入的。
Some grounds are closed during the spawning season (eg, for cod); others—nursery areas—are permanently off limits.
这项最新调查是由英国埃克塞特大学和国际野生生物保护学会(WCS)共同主持的，在2002年至2007年期间的三次棱皮龟产卵期内，他们统计了棱皮龟巢穴以及筑巢的雌性棱皮龟数量。
The survey, led by the University of Exeter with the Wildlife Conservation Society (WCS), counted nests and nesting females during three nesting seasons between 2002 and 2007.
由原始的本能所驱动，大马哈鱼会奋力逆流而上在它们出生的同一个安静的水池内产卵。
Driven by primordial instinct, the salmon hurl themselves upstream to spawn in the same tranquil pools where they themselves were born.
在这个季节燕子回来了在人的屋檐下做窃青蛙在水中产卵一到晚上不停的叫。
In this season the swallow back in people under the eaves of stolen the frogs lay eggs in the water at night call.
地狱之剑，圣骑士的腰带，光与魔法精灵叶护身符不产卵，在无尽的地牢。
Sword of the Underworld, Paladin's Belt, Amulet of Light and Magic Elven Leaf don't spawn in the Endless Dungeon.
我总是力求最大化利用我的时间且同时保持高效，尤其是在鲱鱼的产卵季，白天能做钓的时间非常有限。
I always strive to maximize my time and remain efficient, especially during the shad spawn when the daytime window of opportunity is so short.
改变：夜间僵尸是重组像白天僵尸。在5天的狗，没有产卵7天所以玩家附近过夜成群的时间。
Changed: night time zombies are restructured like day time zombies. Dogs on day 5, with no spawning near day 7 so players have time for the night hordes.
蚊子在盛水的容器中产卵，这种容器在拉丁美洲城市的大型贫民窟中尤其常见。
The mosquito lays its eggs in containers of water, of a sort that are especially common in the huge slums of Latin American cities.
蚊子在盛水的容器中产卵，这种容器在拉丁美洲城市的大型贫民窟中尤其常见。
The mosquito lays its eggs in containers of water, of a sort that are especially common in the huge slums of Latin American cities.
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