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Carl Schreck

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I'm Carl Schrek and I'm the leader of the Oregon Cooperative Fish and Wildlife Research Unit. And that's actually a partnership between the U.S. Geological Survey, the state of Oregon, and Oregon State University where I am also a professor in Fisheries and Wildlife. Basically my research is trying to understand how the fish respond to the environment. And that's basically to understand also when we do something to the environment, what effect that's going to have on the fish. And then also to use the fish as a barometer of how good the environment is and that could be the environment as well for people. I have a Japanese collaborator who comes over here once or twice a year and works with me. And basically what we've shown is that a very minute decrease in temperature, like one degree or even less, can cause downstream orientation in salmon. In a number of species of salmon, American also Japanese salmon. And then if you think about the impact of global climate change on that and having an understanding of that is very important because systems like on this side of the Cascades are driven more by rain in the winter. So there very often in the winter you get increases in temperature. Whereas if you have a rain event on snow on the east side of the Cascades then the temperature actually decreases. So maybe how the fish respond to the same environmental change can be very different. Well I think the big implications here relate to questions, for example, what's the temperature that fish can tolerate. And very often when environments are impacted we get changes in water temperature. We also get changes in when the temperature changes. In other words, the daily fluctuations in temperature can change. And so a lot of work that we've done is trying to establish what are the levels that are tolerable for fish, because that's a very important management question because when, like I said, when habitat is altered for a variety of reasons often temperature is also effected. So it's important to know exactly where those critical thresholds are. So what I've been talking about really, up until now, relates to the effects of what people do on fish, but since fish have to survive in water our notion basically is that if we take good care of water you'll automatically take good care of fish. And the kind of water that fish need is the exact same kind of water that agriculture and urban environments need. So I think we can solve both problems at the same time by being good stewards to the fish therefore then we're also good stewards to the water and vice versa.

Video Details

Duration: 2 minutes and 50 seconds
Country: United States
Language: English
Genre: None
Views: 63
Posted by: umarket on Jan 11, 2010

Talks about the effects of climate change on fish.

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