Bighead and silver carp - both native to Asia - have been migrating toward the lakes since escaping from Deep South fish ponds and sewage treatment plants in the 1970s.
原产于亚洲的大头鲤鱼和银鲤鱼，20世纪70年代从南方鱼塘和污水处理厂逃逸以来，已经向五大湖扩散。
The first involves two kinds of Asian carp, bighead and silver.
第一个案例涉及两种亚洲鲤鱼：大头鱼和银色鲤鱼。
The first involves 2 kinds of Asian carp, bighead and silver.
第一个案例是关于2种亚洲鲤鱼，头大，银色的鱼身。
This paper investigates the control of the excess propagation of Cyclops by the top-down effect of fish, such as silver carp and bighead carp under different stocking biomass conditions.
该文在不同放养生物量下进行鲢鱼和鳙鱼控制水蚤孳生的下行效应试验研究。
Other experiments in crossing bighead and silver carp have produced a new variety of fish.
使大头鱼和银色鲤鱼杂交的其他试验获得了一个新品种。各式各样的，种类繁多的。
Other experiments in crossing bighead and silver carp have produced a new variety of fish.
使大头鱼和银色鲤鱼杂交的其他试验获得了一个新品种。各式各样的，种类繁多的。
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