LE GOUESSANT commits itself at two levels to the use of marine products in aquaculture :
- the use of fishing industry by-products,
- but as well a partial replacement of fish products by vegetable products.

Some research programs such as Aquamax are run by LE GOUESSANT for several years to dut down at its minimum the use of fish products in aquafeeds while preserving two essential elements : the nutritional quality and the taste of the fish.
As an example, the following table gives the characteristics of a LE GOUESSANT feed (NEO 19) and its fish products composition.

Today, the quantity of marine products needed to produce 1 kg of portion size trout does not exceed 1.2 kg of wild fish while it was over 3 kg in 2005.

In the FRIEND OF THE SEA certified feeds, the fish meals come from fishery by-products and the fish oils from fisheries certified as sustainable.

LE GOUESSANT works now for several years on an in-depth sourcing of marine products from the fishing industry by-products which makes its use in aquaculture coherent. The use of such by-products is today favoured in some standards such as the aquaculture organic standard, hence limiting the impact on the wild resource.

Today, on average, the farming of fed species is a net producer of seafood products (700 g of wild fish needed to produce 1 kg)¹. In persevering in our efforts of reducing the amount of marine resources in favour of vegetable raw materials and with the arrival of some new ingredients (algaes, krill,...), salmonids and marine species fish farming will soon be net producers within 5 to 10 years².

¹ Tacon A.G.J., Metian M., 2008 - Global overview on the use of fish mea land fish oil in industrially compounded aquafeeds : Trends and future prospects. Aquaculture vol. 285, pp 146-158.
² Ibid.