October 13th, 2009 by Hayley
Source: Stockxchng
Following on from the previous post, here is some more information on the use of fishmeal and fish oil in feeds.
The article Fish in – Fish out Ratios Explained, by Andrew Jackson, published in Aquaculture Europe Vol. 34 (3) September 2009, has been added to the Envirofinfish Library.
“One of the long continued debates in aquaculture is the use of fishmeal and fish oil in feeds and the amount of wild fish it takes to produce farmed fish. This debate has particularly raged around the use of fish oil and fish meal in salmon diets and a lot of different figures have been quoted for the number of tonnes of wild fish it takes to produce a tonne of farmed salmon (FIFO ratio). These quoted figures range from 3:1 to 10:1; the most recent figure published comes from Tacon & Metian (2008) who gave the figure for salmon in 2006 as 4.9:1, meaning it takes 4.9 tonnes of wild fish to produce 1 tonne of salmon.”
Click here to read more by viewing the whole article. The document is also available from the Library menu.
Tags: Fish Oil, Fishmeal, Salmon, Wild Fish
Categories: Environmental Impacts
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September 3rd, 2009 by Hayley
A new document has been added to the Envirofinfish Library.
“The conversion of small wild fish into the fishmeal and fish oil (F&FO) for use in formulated diets for farmed fish and crustaceans has become a hotly debated topic. Some argue that the practice of using wild fish in the form of F&FO to feed farmed fish species potentially competes with their direct use for human consumption and their value in the ecosystem. At the centre of the debate are two questions: (i) How many kilograms of wild fish in the form of F&FO does it take to produce 1 kg of farmed fish? (ii) Is the use of wild fisheries to product F&FO sustainable? ”
G. Schipp, Manager Aquaculture, Fisheries, Darwin Aquaculture Centre.
Click here to read more on this topic by viewing the whole article. The document is also accessible from the Library menu. Share your views on this topic by leaving a comment below.
Tags: Feed Conversion, Fish Oil, Fishmeal, Sustainability
Categories: Environmental Impacts
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July 17th, 2009 by Steve
Cobia in an Aquapod - Photograph Steve Page
This website is being developed to provide a platform to exchange ideas and information about sustainable aquaculture and the development and use of practical regulation, policy and management frameworks to ensure sustainability while optimising production and hence economic benefit.
Globally, aquaculture is growing rapidly, but production needs to exceed current growth rates if it is to meet the projected shortfall in seafood (about 38 million tonnes per year by 2030 according to the FAO). Marine finfish can supply a major part of the projected shortfall, but to deliver, the sector will need significant additional investment. That investment, in most countries, will only be realised if investors can see clear and equitable processes are in place for licences and other approvals to be issued and some secure tenure provided for marine sites. To ensure sustainability, it will essential for appropriate regulatory measures to be put in place that foster development while ensuring environmental sustainability.
This website has been set up in response to the need for an interactive space to upload and share information about environmental monitoring, planning, policy, and regulation with reference to marine aquaculture development. Hopefully, it will reduce duplication of effort when researching and designing appropriate environmental regulatory regimes for marine aquaculture and assist in implementation of best practise principles worldwide.
Categories: Environmental Impacts, Environmental Monitoring, Fish Health, Policy & Management
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