Navigation Links
Salmon go veggie to save wild fish stocks

Salmon, like humans, require omega-3 fatty acids in their diet to function healthily. But as the fish farming industry expands, feeding salmon and other aquatic species with pellets containing fishmeal and oil derived from processing wild-caught marine fish is unsustainable in the long term. This is due to rising demands for these commodities for aquafeeds and other purposes in the face of finite or declining annual global fish catches. To provide a solution with respect to fish oil, a team of scientists from the University of British Columbia and the Department of Fisheries and Oceans, Canada, have been studying the effects of replacing anchovy oil with canola oil (also known as rapeseed oil) in the diets of salmon.

The research group, led by Professors Colin Brauner and Patricia Schulte in collaboration with Dr. Dave Higgs in the Department of Fisheries and Oceans Canada, has been monitoring changes in fish growth, exercise capacity and hypoxia tolerance to investigate whether there are any negative consequences on the fish's growth performance and health from a change in diet. Their results, to be presented at the Society for Experimental Biology Annual Meeting on Tuesday 4th April [session A4], find that the fish suffer no ill effects from replacing up to 75% of the dietary lipid (mainly from fish oil) with canola oil.

"We are finding that as long as we meet the basic essential omega-3 fatty acid needs of the salmon with some dietary fish oil, such as those for EPA (eicosapentaenoic acid) and DHA (docosahexaenoic acid), the fish can be reared successfully on these alternate diets", says Professor Brauner, "As aquaculture continues to expand, fish oil will become increasingly more expensive because it is a limited resource, and canola oil will not only be more sustainable as a lipid source, but also will be consistently more cost effective too".

Using canola oil instead of marine fish oil (e.g. anchovy oil) in fish feed will also reduce th e accumulation of contaminants in salmon such as PCBs and dioxins that are present in wild marine fish. This new "vegetarian" dietary approach is increasingly being adopted and will likely be applied to many other cultured fish species in the future.


'"/>

Source:Society for Experimental Biology


Related biology news :

1. Salmonella caught red-handed
2. Salmonella bacteria use RNA to assess and adjust magnesium levels
3. Salmon farms kill wild fish, study shows
4. Salmonella survives better in stomach due to altered DNA
5. Mushrooms as good an antioxidant source as more colorful veggies
Post Your Comments:
*Name:
*Comment:
*Email:


(Date:4/13/2017)... 13, 2017 UBM,s Advanced Design and Manufacturing ... feature emerging and evolving technology through its 3D Printing ... run alongside the expo portion of the event and ... demonstrations focused on trending topics within 3D printing and ... manufacturing event will take place June 13-15, 2017 at the ...
(Date:4/11/2017)... 11, 2017 Crossmatch®, a globally-recognized leader ... today announced that it has been awarded a ... Activity (IARPA) to develop next-generation Presentation Attack Detection ... "Innovation has been a driving force within Crossmatch ... allow us to innovate and develop new technologies ...
(Date:4/11/2017)... , April 11, 2017 No ... but researchers at the New York University Tandon ... of Engineering have found that partial similarities between ... systems used in mobile phones and other electronic ... The vulnerability lies in the fact ...
Breaking Biology News(10 mins):
(Date:4/19/2017)... ... April 18, 2017 , ... A number of new instruments ... which is part of the Protein and Cell Analysis Education Webinar Series , ... this technology fits in current and future applications. , Many flow cytometers have ...
(Date:4/19/2017)... ... April 18, 2017 , ... ... Labs . The move comes after the company changed focus to making analytical ... new brand and our new technology,” says CEO Robert Hart. Founders Bernardo Cordovez, ...
(Date:4/19/2017)... MA (PRWEB) , ... April 19, 2017 , ... ... a $1.5M Series A-1 financing round. This event adds to several other early ... of its’ Executive and Scientific Teams. , ThermaGenix will use proceeds ...
(Date:4/19/2017)... (PRWEB) , ... April 19, 2017 , ... ... Event, which makes educational webinars accessible to novices as well as experienced ... preanalytical variables of commonly performed coagulation screening tests. , Hemostasis testing quality ...
Breaking Biology Technology: