Data/hora: 09/06/2024 08:40:49

Provedor de dados: | Institutional Archive of Ifreme (ArchiMer)
País: | France
Título: | Manufacture of "fresh/wet" aquaculture feeds based on by-catches, fish by-products and algae
Autores: | Doudard, Karine; Chim, Liet; Arhaliass, Abdellah; Przybyla, Cyrille; Baron, Regis.
Data: | 2018-08
Ano: | 2018
Resumo: | This work focuses on available bio resources transformation such as by-catches or fish by-products and marine plants (seaweed and microalgae) as ren circuit . The objective is to make this production as autonomous and sustainable as possible and fitted to the idea of circular economy. Thanks to previous projects, it seems that by-catches could be a plentiful source of proteins for fish. The challenge associated with this type of aquaculture formulations relies on the ability to incorporate abundant resources readily available and the significant reduction of certain energy‐consuming steps (such as drying) in order to minimize the environmental impact of a fish feed production. The adequacy of this strategy (fresh raw material and wet feed) with a specification of a nutritional efficient fish feed is the first goal of this project. Lot of studies indicate the potential benefits of a wet diet for fish (better feed conversion ratio, better palatability, increased survival). Otherwise, several studies suggested that seaweed and microalgae could be incorporated to fish diet with potential benefits such as antioxidant properties and promotion of immune responses. Regarding the process, an extrusion technology has been selected. It allows the assembly and functionalization of various ingredients and the manufacture of feeds with specific buoyancy, good stability in water, various shapes and sizes. Highly digestible feed for fish culture, can be produced by extrusion from various raw materials. The central idea of this work is to exploit the cold gelling potential of the fresh fishes by a shear mixing phase obtained by the rotation of the screws of the extruder followed by a baking step. The study of parameters allowing extrusion process control, the availability and possible assembly of the different raw materials according to nutritional requirements of targeted specie, the physical behavior of the feed (water stability, buoyancy) and its bioavailability (palatability, digestibility) as well as feed preservation and safety will be fully explored and exploited. Economic and environmental analysis is also one of the pillar of this project. Indeed, the impact, both economically and environmentally to produce "fresh/wet" aquaculture feed made by transforming through extrusion unwanted catches and plants with a specification of an efficient aquaculture feed constitute the challenge to be met Early trials indicate that textured fresh and wet feed can be made from fish muscles associated with algae by extrusion. Gelling of the fish is sufficient to obtain a feed of good texture.
Tipo: | Text
Idioma: | Inglês

Identificador:

http://archimer.ifremer.fr/doc/00456/56736/58525.pdf

http://archimer.ifremer.fr/doc/00456/56736/

Editor: | AQUA 2018 - World Aquaculture Society Meetings. August 25-29 2018, Montpellier, France
Formato: | application/pdf

Fonte:

info:eu-repo/semantics/openAccess

restricted use