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Fishy consequences of transplanting trout, salmon, whitefishes
Date:1/26/2011

or conservation programs looking to transplant species into new habitats for a variety of purposes.

"Salmon from Quebec, for instance, should not be reintroduced into British Columbia streams," says Fraser. "For fish to successfully adapt to a new environment, they should be selected by geographic proximity."

Natural selection is what drives local adaptation of fish stocks. "Natural selection may have favored faster growth in certain populations," he says. "If these same populations can also deal with higher temperatures, they may be better suited for new aquaculture initiatives in the face of climate change. This is another benefit of considering local adaptation."

The research team examined other factors that caused fish stocks to thrive or abate: environmental factors, temperature, geology, water chemistry, migration distance, pathogens, parasites, prey and predators.

The result? "Climate change will have a profound effect on species," says Fraser. "And understanding why local populations outperform foreign populations in their home environment may help to predict which populations within species are most likely to persist in the future.'"


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Contact: Sylvain-Jacques Desjardins
s-j.desjardins@concordia.ca
514-848-2424 x5068
Concordia University
Source:Eurekalert  

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