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。

youdao

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。

youdao

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。

youdao

It warns of the possible collapse of fish species important to the commercial food supply.

VOA: special.2010.05.25

But more and more Asian Carp are edging out the populations of those native fish species, and keep finding their way into Isaak's nets.

VOA: standard.2010.07.19

In addition, more than three hundred fifty bird species and three hundred species of fresh and saltwater fish live within the park.

VOA: special.2009.06.30

Fish species only represent two to three per cent of all living things in the ocean.

UNESCO: THEMES

This provides hiding places and breeding grounds for a wider variety of fish species.

ECONOMIST: Marine conservation

These deepwater ecosystems have important connections to other parts of the Gulf ecosystem, including many commercially-important fish species.

FORBES: The High Cost of 'Cheap Energy'