|
perch_wide-4516b69fb2803c6e168bfc34cb5b2ce7db1c88a1-s4005.jpg
简介：Perch exposed to the anxiety drug oxazepam were more daring and ate more quickly than fish that lived in drug-free water.
参与方式：全文听写
Jonatan
Kliminder
Dan
Schlenck
University
of California at Riverside
benzodiazepine
不同说话者换行即可~口误重复不用写
At this point, Kliminder can only speculate whether the drug is actually affecting the population of perch in the wild. But hypothetically, it could.
This drug actually removes some of the fear, the sense of fear, from these fishes. So instead of being afraid they focus on feeding.
In the wild, that could leave a small fish more vulnerable if it strays from the relative safety of a school.
The most likely outcome there would be that the bigger fish will eat it.
The key question is whether the drug is affecting the growth, survival and reproduction of fish in the wild, and by so doing, perturbing the ecosystem.
Dan Schlenck is at the University of California at Riverside. He says it won't be easy to figure that out.
It's one thing to expose animals in a tank, where they're sort of captive and can't move away from the exposure, to where you're in a large stream or water body that they can actually move around and get away from that.
The water is likely to be considerably cleaner upstream and downstream from the sewage plant where the Swedish perch were captured. And it's also the case that benzodiazepines have been used for decades in Sweden, so they have no doubt been in this aquatic ecosystem for many years.
These fish may have adapted to that. | 
发表于 2016-8-2 11:40:30