Posts Tagged ‘breeding’


The Genome Project

November 17th, 2008 by Andrew

If you’re a fan of National Geographic you’ll be familiar with their human genome project. Together with IBM NG are mapping the movement through time of our global civilization from our earliest ancestors, African “Adam & Eve”. They use genetic markers which are evolutionary changes in an organism’s DNA that can be tracked through it’s descendants. It’s a fascinating project in which you yourself can get involved by sending off for a DNA testing kit.

Genome Canada, “The Atlantic Cod Story” is a similar project. Its purpose is not to track migration patterns but to develop an understanding of of better breeding in Atlantic Cod. I like the idea as it’s not about GM but about using genetic information to improve natural breeding results.

Here’s a link to the project;

http://www.genomecanada.ca/en/info/fisheries/atlantic.aspx

One aquaculture specialist, Nell Halse, explains the project best,

“It takes several generations of breeding to produce the best stock. By working with our partners in this genomics project, we’ll be able to identify ‘markers’ on the fish DNA that will pinpoint specific traits. This will allow us to increase the accuracy of our breeding program, making it much more efficient.”

Sean


Warming threatens Australian fisheries

November 4th, 2008 by Andrew

Changes in sea temperatures, currents, winds, rainfall, sea levels and extreme weather events threaten to adversely affect fish and shellfish numbers, said a report by the Commonwealth Scientific & Industrial Research Organisation (CSIRO). 
        
Australia’s A$220 million salmon industry off the southern island state of Tasmania could be the hardest hit as salmon are already cultivated close to their upper thermal limit. 
    
By 2030 sea surface temperatures in the South Tasman Sea are expected to rise by 0.6 to 0.9 degrees Celsius and along the northwest coast of Australia between 0.3 and 0.6 degrees Celsius, says Australia’s Bureau of Meteorology. 
     
“This report is yet another reminder that climate change imposes costs on this nation — costs not only in terms of our way of life, but in terms of the economic costs to our industries and to our communities,” said Climate Change Minister Penny Wong. 
    
Australia’s aquaculture industries would have to adapt to climate change through selective breeding and by regulating their marine environments, said the CSIRO report. 
    
“Australian fisheries and aquaculture management policies do not currently incorporate the effects of climate variability or climate change in setting harvest levels or developing future strategies,” said the report.

Click here to read the report


Selective Fish Breeding For Disease Resistance

October 15th, 2008 by Andrew

Research has been proved to be economic on improving disease resistance by gene expression profiling in Atlantic Salmon using the Genome Wide Selection (GWS) method.

Though these are time consuming tests they are facilitating the discovery of quick and e cheap methods.

Via computer simulation, the benefits-costs ratio had been estimated in regards to the entire industry. According to report, published by Robinson and Hayes,

The Benefit-Cost ratio is estimated to be 17:1, total value added/kg of fish €0.29/kg. Selective breeding improved genetic performance and the revenue is realized from increased survival rate (after feed costs were subtracted).


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