Archive for the ‘Hatchery R&D’ Category


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


Using Furarone Paints as an Anti-Foulant

November 16th, 2008 by Andrew

The red alga Delisea pulchra has been a model organism for understanding the ecological role of secondary metabolites as natural antifoulants.
Furanones are produced by the plant and delivered to the surface at a concentration where they regulate bacterial colonisation and the settlement of epibiota.
This biological understanding has led to the application of furanones as inhibitors of bacterial- and macro-fouling. Furanones inhibit bacterial colonisation and biofilm development through interference with a key bacterial quorum-sensing pathway, the acylated homoserine lactone regulatory system in Gram-negative bacteria.

Laboratory antifouling assays have been used to identify effective and safe furanone-analogues while field trials of furanones incorporated into coatings and polymers demonstrate efficacies similar to commercial biocides. Further development is required to control the release of compounds from suitable carriers to extend coating/polymer lifespans. This review summarises the extensive work on furanones focusing on their natural and applied antifouling activities.

http://lib.bioinfo.pl/pmid:16805438

Barnacles cause corrosion and make ships heavier and harder to steer. Antifouling paints that contain tin or copper stop barnacles from attaching and leach metals into the sea and kill many nontarget organisms. An antifouling chemical made by Delisea pulchra blocks bacterial communication systems and prevents bacterial biofilms from developing on its surface. This then stops barnacles from attaching. The seaweed metabolite can be used to replace the toxic chemicals in any environment that can be submerged in an aqueous environment.

http://www.babs.unsw.edu.au/about/centres/cmbb_biofouling.html


Rotating Fish Cages to prevent Fouling

November 16th, 2008 by Andrew

Another way of preventing fouling and Easy cleaning is to use rotating fish cages.

Rotating Fishcages; when one side of the cage is being fouled up, it rotates and let another side handle the flow of water; this should help prevent or at least diminish the fouling process considerably. The turning of the cage should be done by a buoyancy system, where air is let into one side of the cage to turn it so that a new side is facing the current and gets cleaned.

 

http://www.patentgenius.com/patent/4380213.html


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