6. Nets Drive Evolution of Small Fish Being a big fish in a small pond is more likely to get you noticed. That’s good news if you’re say the best picture in your little lit (league联盟) division. But it’s not so good news if you are an actual fish, because bigger fish are the ones attend（that tend）to get caught. Not only is that bad news for the fish, but it may be bad for the whole population. Where (Or) so sayscientists from Australia and Canada in the online edition of Proceedings of national academic of sciences. They found that fishing for the largest individuals targets the fastest growers, leaving behind the (their) slower-growing counterparts. That means the current fishing practices may favor the evolution of slower growing fish. The scientists stocked two small lakes in British, Columbia with two stains of rainbow trout. One that grows quickly (and is)as more aggressive as (in) chasing down food. And the other(another that) grows slowly (and tends) intends to be more cautious. They then used the (commercial gillnets)gilnas to fish the lakes and find(found that they bagged) the back bolder fish three times than the shy ones, which (were) left behind to multiply. So, we could inadvertently to (be) breeding fewer(fearful small fry无足轻重的人)for small fry that (are) nearly impossible to catch, which make them hard to seafood.(hard-to-see food)
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发表于 2011-10-11 19:35:02
