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。
The giant freshwater Mekong River stingray is just one of many mega fish species that could be threatened by dam-building plans in the Mekong River Basin.
湄公河流域的筑坝计划将会威胁到很多巨型鱼类，这种巨型淡水黄貂鱼只是其中一种。
The author mentions the estimated numbers of birds and coral fish species on various Oceanic islands in order to demonstrate how much knowledge about Oceanic species has been accumulated.
作者提到了各种海洋岛屿上鸟类和珊瑚鱼物种的预估数量，以显示已经积累了多少关于海洋物种的知识。
Unisexuality occurs in some fish species.
有些鱼种是雌雄同体的。
The number of fish species in Poyang Lake has already fallen by half.
鄱阳湖鱼的种类已经减少了一半。
The rise in global seafood consumption comes as many fish species become scarcer.
——很多鱼类品种日益稀少，全球海鲜消费量增加。
It can move across land at night, reaching water no other fish species has colonised.
它能在夜间穿过陆地到达没有其他鱼种繁殖的水域。
Males of a certain fish species will punish females when they misbehave while eating, a new study finds.
一项新的研究发现，某种鱼在就餐时，如果雌性鱼举止不礼貌，雄性鱼会惩罚它。
The reefs, which also support industries such as fishing and tourism, are also the nursery for numerous fish species.
珊瑚礁不仅支持着当地渔业及旅游业，同时也成为众多鱼类的天然养殖场。
Yes - just as we find differences between the various meats, so we find surprisingly large variations between fish species.
是的—就像我们发现各种不同肉类之间存在差异一样，我们很惊奇的发现不同种类的鱼之间也有着非常大的不同。
The reserve is home to 180 different fish species, including the already endangered Chinese sturgeon and the finless porpoise.
这个保护区是180种鱼类的栖息地，其中包括已经濒危的中华鳕和江豚。
In just 10 years, 33 new fish species have been discovered in the oceans surrounding the island, including the damselfish Chrysiptera cymatilis.
在短短10年的时间里，在该岛屿周围发现了33中新的鱼类，其中包括小热带鱼Chrysiptera cymatilis.这种醒目的蓝色小鱼是在米尔湾的水域中北发现的。
Up to 25 percent of the world’s tropical fish species swim in the protected waters around Koh Lipe (the island is in Tarutao National Marine Park).
里朴岛周围的水域里，多达25%世界热带鱼种在受保护的水域里游来游去（该岛在绿龟岛（Tarutao）国家海洋公园内）。
But International River's Ame Trandem said no fishery technology currently exists that can guarantee safe passage for the Mekong's numerous fish species.
然而，国际河流组织的AmeTrandem称，当下并没有什么渔业技术可以保证湄公河鱼类的安全迁徙。
This striking blue fish was found in the waters of Milne Bay Papua New Guinea a region of pristine reef environments and home to a huge number of fish species.
那里是位于巴布亚新几内亚的一个原始的珊瑚礁生态环境，是许多鱼种的家园。
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。
This striking blue fish was found in the waters of Milne Bay, Papua New Guinea, a region of pristine reef environments and home to a huge number of fish species.
那里是位于巴布亚新几内亚的一个原始的珊瑚礁生态环境，是许多鱼种的家园。
Among the specific findings: Low Arctic fish species such as pollack have benefited from rising ocean temperatures, which is why their populations have increased.
一些具体的研究结论：受益于海水温度上升，低北极鱼类如鳕鱼的种群数增加。
End of the Line draws attention to the rapid depletion of fish stocks, and the danger to the seas and environment of continuing to consume endangered fish species.
《航线之末》将人们的视线引向了急剧减少的鱼类资源，以及继续消耗濒危鱼种将对海洋和环境带来的危害。
Over a fifth of the world's freshwater fish species of a century ago are now endangered or extinct. Half the world's wetlands have also disappeared over the past 100 years.
一个世纪以来，全球湿地消失了一半，淡水鱼种类中超过五分之一已经灭绝或濒临灭绝。
The fish species in question, however, migrate between these two areas, so the question was how much the reduction of fishing effort in part of their range would affect their Numbers.
但是，由于作为研究对象的鱼类洄游于上述两个海域之间，于是问题也就产生了：捕鱼活动在部分海域的减少，对鱼类数目的影响究竟有多大。
Members of one damselfish species use facial patterns of speckles and swooshes to identify the fish species they regularly attack, researchers report in an upcoming issue of Current Biology.
根据即将出版的现代生物学上的一篇研究报告，有一种鲷类鱼通常会攻击某一种具有相同表面斑纹和发出相似哗哗声的种群。
Their methods do not attempt to estimate the actual biomass(the amount of living biological matter) of fish species in particular parts of the ocean,but rather changes in that biomass over time.
他们的方法并不是要评估特定海域鱼种的实际生物量，而是评估在这一段时间内生物量的变化。
Their methods do not attempt to estimate the actual biomass (the amount of living biological matter) of fish species in particular parts of the ocean, but rather changes in that biomass over time.
他们的方法并不是要评估特定海域鱼种的实际生物量，而是评估在这一段时间内生物量的变化。
Their methods de not attempt to estimate the actual biomass (the amount of living biological matter) of fish species in particular parts of the ocean, but rather changes in that biomass over time.
他们研究了半个世纪以来世界上所有的渔场，其研究方法并不是为了试图估算特定区域的海洋中实际生物总数（活着生物的总数），而是研究单位面积中海洋生物数量发生的变化。
Mercury levels are high in marine fish, too—particularly in larger species, such as shark, tuna, and swordfish.
海洋鱼类中的汞含量也很高——尤其在体型较大的鱼类体内，如鲨鱼、金枪鱼和旗鱼。
Mercury levels are high in marine fish, too—particularly in larger species, such as shark, tuna, and swordfish.
海洋鱼类中的汞含量也很高——尤其在体型较大的鱼类体内，如鲨鱼、金枪鱼和旗鱼。
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