Fears are now being voiced that the planned construction of an oil pipeline across the lake's bottom might revive pollution and cause the fish population to decline again.
现在有人担心，计划修建的穿越湖底的输油管道可能会重新造成污染，导致鱼类数量再次下降。
Surplus production models are among the main models for fish population dynamics.
剩余产量模型是鱼类种群动力学的主要模型之一。
Mainly work on fish population dynamics, including growth, mortality, recruitment and population dynamics.
主要研究鱼类种群动力学，包括海洋鱼类的生长，死亡，补充，数量变动等。
The classical fish population dynamic models were largely on the basis of stable population behavior assumption.
经典的鱼类种群动态模型是以稳定的种群行为为基础的。
With feed particle size and increase the growth of fish and fish population remained at about half full at the time.
饲料粒径大小随鱼的生长而增大，并维持在鱼种口全开时的一半左右。
The other fisherman get more fish than he does, make more in profits, and will ultimately deplete the fish population anyway.
别的渔夫捕鱼比他多，收益比他高，最终鱼还是要被捕光。
That change in chemistry has led to staggering alterations in the lake's ecology, causing precipitous drops in the Aral Sea’s fish population.
化学成分的改变极大地改变了湖区的生态环境，导致咸海鱼类数量剧减。
The researchers also found that more than half (54 percent) of the decline in the predatory fish population has taken place over the last 40 years.
研究者还发现在过去的四十年中食肉鱼类的数量减少了一半以上（54%）。
Fish stock assessment is to use various statistical and mathematical methods to quantify the reactions of fish population to fisheries management choices.
资源评估是应用各种统计和数学方法量化地研究鱼类种群形态对渔业管理选择的反应。
When the environment variations are high, the white noise level (coefficient of variation) increases to 35%, the stable fish population becomes spasmodic.
在环境变化较大时，白色噪音水平(变动系数)增加至35%，稳定型种群变为不稳定型。
Those active fish are the 10 percent of the fish population that an angler has the greatest chance of catching - but chances are they are spread out over a great area.
这10%活跃的鱼就是钓手最有可能掉到那些，但是这些与都分布在很大的区域里。
Removing the mud, uncovering gravel beds where fish spawn, and finding suitable salmon types to rebuild the population is a daunting task.
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。
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.
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。
The population of this fish species has also declined, even though the annual number caught for human consumption has not increased.
尽管供人类食用的年捕鱼量没有增加，但这种鱼的数量也在下降。
These fish and snails have themselves experienced a decline in population because of overfishing by humans.
由于人类的过度捕捞，这些鱼和蜗牛的数量已经有所下降了。
This levelling off, coupled with a growing world population and increasing per capita demand for fish, spells trouble.
这种停滞不前加上世界人口不断增长和人均鱼品需求量的扩大都将造成问题。
A growing global population needs ready sources of protein, and fish - generally low in fat and high in nutrients - is a natural.
随着全球人口的不断增长，对现成蛋白质的需求也在上升，而鱼是最天然蛋白质的来源，低脂肪高营养。
But the population of rare and unique fish species has been declining since the 1980s because of dam building, water pollution, overfishing and land reclamation.
但自上世纪80年代以来，由于兴修水利、水污染、过度捕捞和垦荒，珍稀特有鱼类的种群数量一直在不断下滑。
Every year humans take more than 50 million tons of fish from the oceans without critically depleting the population of any species.
每年人类从海洋中捕捞约5千万吨的鱼类，但这并未导致任何鱼种的灭绝。
The Atlantic population of the giant fish that grows to an average of more than 360 kilograms has fallen by 90 percent.
这种繁衍于大西洋、平均可重达360公斤的鱼的数量缩减了九成。
In 1999 fish friers served up more than 283 million meals a year making it the most popular takeaway among the British population.
仅1999年一年就有2.83亿份油炸鱼出炉，使之成为了最受英国人欢迎的外卖食品
The spawning times, absolute fecundities, age structures of breeding population, and spawning types of fish were also studied.
测定分析鱼类生殖力、产卵期、繁殖群体的年龄结构及产卵类型。
As the Oregon Department of Fish and Wildlife goes in search of the bear population, they want to remind viewers that now is also the time bears could be the ones finding you.
随着奥勒冈州鱼类和野生动物部门进入熊群体的调查，他们想要提醒参观者，现在也是熊可能寻找你们的时候。
Virtual population analysis (VPA) is one of the classic models in fish stock assessment, and is one of the main models in calculating the total allowable catch (TAC).
实际种群分析法(VPA)是渔业资源评估的经典模型之一，也是总允许捕捞配额(TAC)计算的主要模型之一。
A result of this latest poll we can be 95 percent sure that 1 to 3 percent of the population are truly vegetarian, that is to say, they never eat meat, fish, or fowl.
最近一次抽样调查的结果，让我们有95%的把握相信，有1 - 3%的人口是真正的素食主义者，也就是说，他们从来不吃肉类、鱼类或家禽。
Recruitment takes place in locations where fish entering the exploitable fraction of the population have been passively displaced by currents and then by active movement up habitat index gradients.
招聘发生在地点鱼类进入可利用的一小部分人口已经被动而流离失所的电流，然后通过主动运动破坏生态环境指标梯度。
Recruitment takes place in locations where fish entering the exploitable fraction of the population have been passively displaced by currents and then by active movement up habitat index gradients.
招聘发生在地点鱼类进入可利用的一小部分人口已经被动而流离失所的电流，然后通过主动运动破坏生态环境指标梯度。
应用推荐