They provide spawning grounds and nutrients for fish and shellfish.
它们为鱼类和贝类提供产卵场所和营养物。
Closing breeding and spawning grounds to protect Marine ecosystems.
关闭繁衍产卵地以保护海洋生态系统。
The eyes of eels grow larger for their final journey to their spawning grounds, enhancing their vision.
为奔向它们的产孵地而开始最后的旅行时，鳗鱼的眼睛会变大，提高了它们的视野。
The spawning grounds have been covered in oil at times, and there are fears that an entire year's brood may be missing.
产卵地不时被覆盖上油污，令人担忧的是整年的鱼苗都死光光。
That part of Louisiana contains some 40 percent of the nation's wetlands and is spawning grounds for countless fish and birds.
毕竟，路易斯安那拥有美国40%的湿地资源，为不计其数的鸟和鱼类提供生存场地和食物来源。
They include southern Oregon's Chetco, where gold miners plan to suction-dredge some of the best salmon spawning grounds in the state.
这些河流包括俄勒冈南部的切特科河，一些金矿工人计划用吸扬氏挖泥船把这个州内一些最适合大马哈鱼产卵的河底挖深。
When herring migrate toward their spawning grounds, they run in schools extending as long as 17 miles and containing millions of fish.
当鲱鱼向产卵地迁移时，它们那数百万成员的队伍绵延可达十七英里。
This paper sums up and discusses the progress in study on eel species, distribution, spawning grounds and artificial breeding and so on.
文中总结了鳗鲡的生活史、种类、分布、产卵地、人工育苗技术的研究情况，并分别进行了讨论。
Researchers diving on squid spawning grounds had noticed that not just female squid would hang around the many mop-like clusters of egg capsules.
研究人员潜到乌贼的产卵地，发现并不只有雌性乌贼围绕这些拖把一样的乌贼卵团团转。
Timber companies offered jobs. But wages from those jobs bought clear-cuts that reduced forests to stumps, destroying bear habitat and salmon spawning grounds.
后来木材公司为当地居民提供了工作，但代价是大片林地被购买去当作皆伐区，密林只剩树桩，熊的栖息地和鲑鱼的产卵地都遭到了破坏。
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.
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。
So, salmon swim upstream to get to their spawning grounds, and lancet flukes commandeer a passing ant, crawl into its brain, and drive it up a blade of grass like an all-terrain vehicle.
鲑鱼会游到河的上游去找寻产卵的地方。而枝双腔吸虫则会钻到蚂蚁的大脑里，操控蚂蚁的大脑，驱赶着蚂蚁爬到草尖上。
"Fishing areas" means spawning grounds, feeding grounds, wintering grounds and migration channels of fishes and shrimps , and the mariculture waters of fishes, shrimps shellfishes and algae.
渔业水域，是指鱼虾类的产卵场、索饵场、越冬场、洄游通道和鱼虾贝藻类的养殖场。
This paper elaborates the distribution and scale of spawning grounds and the reproductive conditions of Coreius heterodon in Yichang Section after damming by Gezhouba water conservancy pivot.
本文阐述了葛洲坝水利枢纽工程截流后，宜昌江段铜鱼产卵场的分布和规模及其繁殖条件。
Once the animals die, the rocky structures erode, depriving fish of vital spawning and feeding grounds.
一旦这种动物死亡，礁石结构将会受侵蚀，作为鱼类至关紧要的产卵及进食的重要场所也不复存在。
Some grounds are closed during the spawning season (eg, for cod); others—nursery areas—are permanently off limits.
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);
有些渔场在产卵季节被封闭（例如，为了鳕鱼产卵）；
Some grounds are closed during the spawning season (eg, for cod);
有些渔场在产卵季节被封闭（例如，为了鳕鱼产卵）；
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