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:

(Date:11/26/2015)... DUBLIN , Nov. 26, 2015 Research ... of the "Capacitive Fingerprint Sensors - Technology and ... --> --> ... market, especially in smartphones. The fingerprint sensor vendor Idex ... fingerprint sensor units in mobile devices and of the ...
(Date:11/20/2015)... OXFORD, Connecticut , November 20, 2015 ... biometric authentication company focused on the growing mobile commerce ... its CEO, Gino Pereira , was recently interviewed ... The interview will air on this weekend on ... Bloomberg Latin America . --> NXTD ) ...
(Date:11/19/2015)... 19, 2015  Based on its in-depth analysis of ... BIO-key with the 2015 Global Frost & Sullivan Award ... Sullivan presents this award to the company that has ... needs of the market it serves. The award recognizes ... expands on customer base demands, the overall impact it ...
Breaking Biology News(10 mins):
(Date:11/24/2015)... ... November 24, 2015 , ... ... Technologies, Inc., on being named to Deloitte's 2015 Technology Fast 500 list of ... OrthoAccel manufactures AcceleDent®, a FDA-cleared, Class II medical device that speeds up orthodontic ...
(Date:11/24/2015)... ANGELES , Nov. 24, 2015 ... biotechnology company focused on the discovery, development and commercialization ... , Ph.D., Chief Executive Officer, is scheduled to present ... 1, 2015 at 10:50 a.m. EST, at The Lotte ... City . . ...
(Date:11/24/2015)... 24, 2015  PDL BioPharma, Inc. (PDL) (NASDAQ: PDLI ... company,s president and chief executive officer, will present at the ... in New York City . The presentation ... 1, 2015 at 9:30 a.m. EST. ... website at least 15 minutes prior to the presentation to ...
(Date:11/24/2015)... ... November 24, 2015 , ... Whitehouse Laboratories is pleased to announce that it ... will be strictly dedicated to basic USP 61, USP 62 and USP 51 testing ... have complete chemistry and micro testing performed by one supplier. Management has ...
Breaking Biology Technology: