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

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

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:
*Name:
*Comment:
*Email:
Related Image:
Fishy consequences of transplanting trout, salmon, whitefishes
(Date:4/4/2017)... , April 4, 2017   EyeLock LLC ... announced that the United States Patent and Trademark Office ... broadly covers the linking of an iris image with ... transaction) and represents the company,s 45 th issued ... patent is very timely given the multi-modal biometric capabilities ...
(Date:3/30/2017)... , March 30, 2017 Trends, opportunities ... (physiological and behavioral), by technology (fingerprint, AFIS, iris recognition, ... recognition, and others), by end use industry (government and ... immigration, financial and banking, and others), and by region ... , Asia Pacific , and ...
(Date:3/24/2017)... 2017 The Controller General of Immigration from Maldives ... Algeen have received the prestigious international IAIR Award for the most ... Reading ... Maldives ... Abdulla Algeen (small picture on the right) have received the IAIR award ...
Breaking Biology News(10 mins):
(Date:8/16/2017)... ... ... While art and science are often thought of as two completely separate modes ... Mesh Is Also a Snare, a group exhibition presented by the Philadelphia-based artist collective ... on August 17 and run through September 30. An opening reception will be held ...
(Date:8/15/2017)... After spending the past two years building a state-of-the-art technology which ... offers this platform to healthcare stakeholders (hospitals, foundations, biopharma companies etc.) ... collection vis a vis their members, under their own brand. Three ... offer. ... ...
(Date:8/15/2017)... ... August 15, 2017 , ... Kenall, a leader ... designed to stay tightly sealed and perform efficiently for years. The downlights are ... listings just aren't enough, such as: hospitals; behavioral health facilities; cleanrooms; containment areas; ...
(Date:8/14/2017)... ... August 14, 2017 , ... ... interconnect using USB or PCI Express, announced the release of SYZYGY™, a new ... to satisfy the need for a compact, low cost, low pin-count, high-performance connectivity ...
Breaking Biology Technology: