Difference between revisions of "Algae for Tilapia"
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| − | Tilapia (Oreochromis niloticus) may effectively control algal blooms in eutrophic waters.[http://link.springer.com/article/10.1007/s10750-006-0023-5#page-1] | + | Tilapia (Oreochromis niloticus) may effectively control algal blooms in eutrophic waters.[http://link.springer.com/article/10.1007/s10750-006-0023-5#page-1] |
| + | Tilapia feed selectively on large algae, mainly cyanobacteria and diatoms.[http://onlinelibrary.wiley.com/doi/10.1111/j.1365-2427.2005.01407.x/abstract?deniedAccessCustomisedMessage=&userIsAuthenticated=false] Blue-green algae are common components of the Tilapia diet. Ingestion rates are higher on Anabaena cylindrica (larger filamentous cyanobacteria that exists as plankton) than on Microcystis aeruginosa (freshwater cyanobacteria that produce neurotoxins and hepatotoxins).[http://link.springer.com/article/10.1007/BF00002160#page-1] Surface-grazing on periphyton (mixture of algae, cyanobacteria, heterotrophic microbes and detritus attached to submerged surfaces) is also greater than on Microcystis aeruginosa. For tilapia, filter-feeding may be a relatively unimportant method of ingesting algae.[http://onlinelibrary.wiley.com/doi/10.1111/j.1095-8649.1993.tb00573.x/abstract] | ||
| − | Tilapia (Sarotherodon niloticus) grow better on fishmeal than on a 25% protein green algae meal (Cladophora glomerata). Weight gain decreased as the level of algal protein increased as replacement of fish meal. Protein digestibility was highest on a 5:1 ratio (fishmeal : green algae meal).[http://www.sciencedirect.com/science/article/pii/0044848683901485] Protein synthesis (with normal sulfur and carbon content) by green algae during the night may match protein synthesis during the day (in Dunaliella tertiolecta).[http://m.aslo.info/lo/toc/vol_29/issue_4/0731.pdf] Protein derived from algae does not promote adequate growth in Rainbow trout.[http://www.sciencedirect.com/science/article/pii/0044848678900972] | + | Under most unnatural feeding conditions tilapia are unable to sufficiently ingest high volumes of algae. They may need constant grazing to fulfill their nutrient requirements.[http://onlinelibrary.wiley.com/doi/10.1111/j.1095-8649.1995.tb01868.x/abstract] Tilapia (Sarotherodon niloticus) grow better on fishmeal than on a 25% protein green algae meal (Cladophora glomerata). Weight gain decreased as the level of algal protein increased as replacement of fish meal. Protein digestibility was highest on a 5:1 ratio (fishmeal : green algae meal).[http://www.sciencedirect.com/science/article/pii/0044848683901485] Protein synthesis (with normal sulfur and carbon content) by green algae during the night may match protein synthesis during the day (in Dunaliella tertiolecta).[http://m.aslo.info/lo/toc/vol_29/issue_4/0731.pdf] Protein derived from algae does not promote adequate growth in Rainbow trout.[http://www.sciencedirect.com/science/article/pii/0044848678900972] |
Nile tilapia is particularly effective in filtering the larger particle size taxa.[http://www.sciencedirect.com/science/article/pii/S0044848602001333] | Nile tilapia is particularly effective in filtering the larger particle size taxa.[http://www.sciencedirect.com/science/article/pii/S0044848602001333] | ||
In the stomach of Tilapia nilotica the cells of blue-green algae are lysed by high concentrations of acid (pH 1.4–1.9). After lysis, cell contents are digested in the intestine (by pepsinogen, a pancreatic α-amylase, trypsin, chymotrypsin and esterase activity). Acid is secreted in relation to feeding. Acid is not secreted by stressed fish.[http://onlinelibrary.wiley.com/doi/10.1111/j.1469-7998.1973.tb07514.x/abstract] | In the stomach of Tilapia nilotica the cells of blue-green algae are lysed by high concentrations of acid (pH 1.4–1.9). After lysis, cell contents are digested in the intestine (by pepsinogen, a pancreatic α-amylase, trypsin, chymotrypsin and esterase activity). Acid is secreted in relation to feeding. Acid is not secreted by stressed fish.[http://onlinelibrary.wiley.com/doi/10.1111/j.1469-7998.1973.tb07514.x/abstract] | ||
Revision as of 17:30, 30 September 2014
Tilapia (Oreochromis niloticus) may effectively control algal blooms in eutrophic waters.[1] Tilapia feed selectively on large algae, mainly cyanobacteria and diatoms.[2] Blue-green algae are common components of the Tilapia diet. Ingestion rates are higher on Anabaena cylindrica (larger filamentous cyanobacteria that exists as plankton) than on Microcystis aeruginosa (freshwater cyanobacteria that produce neurotoxins and hepatotoxins).[3] Surface-grazing on periphyton (mixture of algae, cyanobacteria, heterotrophic microbes and detritus attached to submerged surfaces) is also greater than on Microcystis aeruginosa. For tilapia, filter-feeding may be a relatively unimportant method of ingesting algae.[4]
Under most unnatural feeding conditions tilapia are unable to sufficiently ingest high volumes of algae. They may need constant grazing to fulfill their nutrient requirements.[5] Tilapia (Sarotherodon niloticus) grow better on fishmeal than on a 25% protein green algae meal (Cladophora glomerata). Weight gain decreased as the level of algal protein increased as replacement of fish meal. Protein digestibility was highest on a 5:1 ratio (fishmeal : green algae meal).[6] Protein synthesis (with normal sulfur and carbon content) by green algae during the night may match protein synthesis during the day (in Dunaliella tertiolecta).[7] Protein derived from algae does not promote adequate growth in Rainbow trout.[8]
Nile tilapia is particularly effective in filtering the larger particle size taxa.[9] In the stomach of Tilapia nilotica the cells of blue-green algae are lysed by high concentrations of acid (pH 1.4–1.9). After lysis, cell contents are digested in the intestine (by pepsinogen, a pancreatic α-amylase, trypsin, chymotrypsin and esterase activity). Acid is secreted in relation to feeding. Acid is not secreted by stressed fish.[10]
