Algae meal, macroalgae, microalgae

Scientific Name: 

Nannochloris sp., Selenastrum sp., Chlorella sp., Chlamydomonas sp., Microcystis sp., Scenedesmus sp., Anabaena sp., Amphiphora sp., Dunaliella sp., Spirulina sp., Aphanizomenon sp., Nitzschia sp., Anabaena sp., Platymonas sp., Tervaselmis sp., Chattonella sp., Calothrix sp., Stichococcus sp., Cryptomonas sp., Isochrysis sp., Rhodosorus sp., Chaetoceros sp., Nephroselmis sp., Tetraselmis sp., Nitzschia sp., Pavlova sp., Rhodomonas sp., Navicula sp., Chlamydomonas sp., Aphanizomenon sp., Phaeodactylium sp., etc.

Description:

Water systems containing organic materials, such as swine waste, fishery waste, etc. can be used to grow algae, macroalgae and microalgae (1) (AGRIS 90-058571) (Goh, 1989). Using algae in this way has been proposed as a means of reducing biological oxidation demand in water systems and improving water quality, while at the same time generating a supplemental protein source that can be used in feeding livestock. Various algae meals have been fed to poultry and aquaculture species with mixed results. There is a large variability in nutrient content between different types of algae (7) (CAB 991404186) (Renaud, 1999), (8) (CAB 981415612) (Brown, 1998). Some algaes contain substances that have a negative effect of animal performance and contain toxic components. 

Caution: 

As the level of algae increases in a diet performance decreases, this is thought to be related to the nucleic acid content.

Source:  

Algae, macro and microalgae can be grown on organic materials dispersed in aqueous solutions.

Feeding Experiments:  

Variable results have been observed when algae meals have been fed to animals. Inclusion of algae meal (0, 3, 6, 9%) in broiler diets decreased performance as the level of incorporation increased (2) (AGRIS 89-016518) (Alcazaren, 1987). No depression was observed in performance and survival rate when microalgae was fed to broilers or layers (12) (CAB 931462949) (Sochkan, 1992). Differences in survival rates were observed in snails being fed different types of algae meals (4) (CAB 20000804989) (Wei-FengHua, 1999). Marine mussel growth and survival rate was similar when algae was fed (5) (CAB 19991414395). Algae provided excess or adequate amounts of vitamins to support normal growth in aquaculture species (6) (CAB 19991415139) (Brown, 1999).Feeding and Handling Characteristics: Low yields and high production cost have been indicated to be a problems associated with a microalgae cultivation project (3) (CAB N175232) (Dickson, 1987). Algae is normally collected and sun-dried prior to being fed.

Nutrient Characteristics: