Navigation Links
Fishy consequences of transplanting trout, salmon, whitefishes

This press release is available in French.

Montreal, January 26, 2011 Not all trout are created equal. Those swimming up the streams of British Columbia might resemble their cousins from Quebec, yet their genetic makeup is regionally affected and has an impact on how they reproduce, grow and react to environmental stressors.

Such regional variance makes transplanting fish species to bolster dwindling populations tricky business. These are some of the findings of a compelling review published in Heredity, a journal from the Nature Publishing Group, which examined the adaptability of trout, salmon, charr, whitefishes and graylings across North America and Europe.

The investigation, which compared 93 wild and aquaculture fish populations, was led by Concordia University in collaboration with Simon Fraser University, the Universit Laval and the University of British Columbia in Canada and Aarhus University in Denmark.

"We can't treat a species as something that is homogeneous throughout its range. Fish of the same kind are distinct, whether they grow in lakes, ponds or streams," says first author Dylan J. Fraser, a Concordia University biology professor.

"A salmon from Quebec isn't the same as a salmon from the Atlantic provinces or an individual of the same species from Europe," he continues. "There's considerable variation within species. That genetic diversity can allow a specific type of fish to thrive in one region to better adapt to stressors such as climate change or habitat changes while fish stocks of the same species introduced from another region can dwindle."

Economic implications

Since trout, salmon, charr, whitefishes and graylings are important for commercial fishing, recreational fishing and aquaculture industries, Fraser says this review has economic implications for business 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.'"


Contact: Sylvain-Jacques Desjardins
514-848-2424 x5068
Concordia University

Related biology news :

1. Fishy clue helps establish how proteins evolve
2. Fishy future written in the genes
3. Biofuels production has unintended consequences on water quality and quantity in Mississippi
4. Lethal backfire: Green odor with fatal consequences for voracious caterpillars
5. Psychopaths brains wired to seek rewards, no matter the consequences
6. First time research on long-term consequences of intravenous nutrition on childrens health
7. Forest ecologist sees climate consequences
8. The value of variation: Ecologists consider the causes and consequences
9. Health benefits, consequences of folic acid dependent on circumstances
10. New simulation shows consequences of a world without Earths natural sunscreen
11. UGA study reveals ecosystem-level consequences of frog extinctions
Post Your Comments:
Related Image:
Fishy consequences of transplanting trout, salmon, whitefishes
(Date:11/20/2015)... 20, 2015 NXTD ) ("NXT-ID" ... the growing mobile commerce market and creator of the ... , was recently interviewed on The RedChip Money ... this weekend on Bloomberg Europe , Bloomberg Asia, ... --> NXTD ) ("NXT-ID" or the "Company"), a ...
(Date:11/19/2015)... Nov. 19, 2015  Although some 350 companies are ... by a few companies, according to Kalorama Information. These include ... of the market share of the 6.1 billion-dollar molecular ... World Market for Molecular Diagnostic s .    ... is still controlled by one company and only a ...
(Date:11/18/2015)... New York , November 18, 2015 ... Market Research has published a new market report titled ... Growth, Trends, and Forecast, 2015 - 2021. According to the ... in 2014 and is anticipated to reach US$29.1 bn ... to 2021. North America ...
Breaking Biology News(10 mins):
(Date:11/25/2015)... 26, 2015 --> ... 2016 - 2020 report analyzes that automating biobanking ... quality in long-term samples, minimizing manual errors, improving ... minimizes manual errors such as mislabeling or inaccurate ... it plays a vital role in blood fractionation, ...
(Date:11/25/2015)... 2015  Neurocrine Biosciences, Inc. (Nasdaq: NBIX ) ... CEO of Neurocrine Biosciences, will be presenting at the ... New York . .   ... 5 minutes prior to the presentation to download or ... will be available on the website approximately one hour ...
(Date:11/25/2015)... , ... November 25, 2015 , ... ... uBiome, were featured on AngelList early in their initial angel funding process. Now, ... syndicate for individuals looking to make early stage investments in the microbiome space. ...
(Date:11/24/2015)... 24, 2015 /CNW/ - iCo Therapeutics ("iCo" or "the ... results for the quarter ended September 30, 2015. ... dollars and presented under International Financial Reporting Standards ... ," said Andrew Rae , President & ... are not only value enriching for this clinical ...
Breaking Biology Technology: