Surprisingly, this year the loss of native fish to zander has been greater than before.

令人惊讶的是，今年被梭鲈吃掉的原生鱼比以往更多。

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He says his studies of Australian native fish show fish were intelligent creatures that know how to avoid enemies and catch food like any other animal.

他说，他对澳大利亚本土鱼类的研究表明，鱼是一种聪明的生物，像其他动物一样知道如何躲避敌人和捕捉食物。

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Often, the fish escape and compete with native fish for food, leading to declines in native populations.

这类鱼经常在逃跑后和当地的鱼群争抢食物，因此导致当地鱼群的数量减少。

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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

He says increased demand for the fish could solve two problems - getting paid to fish a nuisance out of the river, and returning the populations of native fish to normal levels not seen in several decades.

VOA: standard.2010.07.19

The state wants to remove millions of carp to protect an endangered species native only to Utah Lake, the June sucker fish.

VOA: special.2009.12.15

Dive shops in Florida and the Caribbean are asking clients to record where they find these ravenous consumers of native fish, and are encouraging divers to go spear fishing for them.

BBC: Hunting possums �C and ecological balance �C in New Zealand

An electric barrier in a shipping canal near Chicago is meant to keep them from migrating into Lake Michigan, where scientists say they eventually could spread to the other Great Lakes and out-compete native fish for food.

WSJ: Study: Asian carp unlikely to stow away in barges

Kornfield and his colleagues will determine the impact that hatchery raised salmon have had on native fish stocks in the eight proposed river runs which include the Narragauagus, Pleasant, Machias, East Machias, Dennys, Sheepscot Ducktrap and Cove Brook rivers.

CNN: Gene study seeks 'wildness' of Atlantic salmon - October 25 1999