Algae are at the base of the aquatic food chain, producing the food resources that fish are adapted to consume. Previous studies have proven that the inclusion of small amounts (Ulva ohnoi) and Rosamin (derived from diatom Entomoneis spp.) for their possible inclusion into diet of Atlantic Salmon (Salmo salar). Fish performances, feed efficiency, lipid metabolism and final product quality were assessed to investigated the potential of the two algae products (in isolation at two inclusion levels, 2.5% and 5%, or in combination), in experimental diets specifically formulated with low fish meal and fish oil content. The results indicate that inclusion of algae product Verdemin and Rosamin at level of 2.5 and 5.0% did not cause any major positive, nor negative, effect in Atlantic Salmon growth and feed efficiency. An increase in the omega-3 long-chain polyunsaturated fatty acid (n-3 LC-PUFA) content in whole body of fish fed 5% Rosamin was observed.
Microalgae Have Great Potential as Fish Feed Ingredient | Oilgae Blog
The study aimed to evaluate the effect of use fresh macro algae including feeding rate with artificial feed on growth performance, feed efficiency and feed cost of rabbitfish fry. Whereas the most of the cultured marine fish are carnivorous species, and seldom are herbivorous or omnivorous species, and the higher prices and uncertainty of availability of fishmeal (FM) is limiting the development of mariculture industry, especially the culture of carnivorous fish. So FAO (food and agriculture organization) quite canonizes the culture of herbivorous or omnivorous species . From this point, the present study presented some information for the development of low-cost diets with fresh macro algae as dietary ingredient for the culture of marine fish such as herbivorous rabbitfish fry.
Company Launches Algae DHA as an Ingredient for Fish Feeds ..
Being herbivorous, the Siganus species need a big quantity of algae feed to assure their biological activities. The stomach of these fishes is an acid medium able to digest marine plants before entering in the digestive tract for complete digestion and thus excreting feces. In addition to algae feed, they can feed accidentally on some nondigestible substances such as mollusk shells and other invertebrates attached to algae [,]. Egypt production of rabbitfish was about 1363 ton in 2014, Mediterranean Sea took part in 822 ton production, Red Sea (466 ton) and lakes (75 ton) according to GAFRD .
Hikari Tropical Algae Wafers for Bottom Feeding Herbivorous Fish Food