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The vundu is the largest true freshwater fish in southern Africa, reaching up to 1.5 m (5 ft) in length and 55 kg (121 lb) in weight. [2] ( Bull sharks are also found in southern Africa and reach a larger size, but occur in both fresh and saltwater.)
It is used industrially in the production of docosahexaenoic acid. [2] Crypthecodinium cohnii is a heterotrophic non-photosynthetic Microalgae . C. cohnii can acclimate a higher docosahexaenoic acid to polyunsaturated fatty acids ratio, [ 3 ] however current studies are trying to increase the volume of DHA production by creating mutant strains.
Studies have shown that commercial fish supplemented with DHA during the spawning season tend to grow faster and have greater survival rates with reduced abnormalities. [159] [160] Astaxanthin, a keto-carotenoid, derived from thraustochytrids have also been used to feed fish, chicken, and turkey, and to even dye food. [10]
DHA in breast milk is important for the developing infant. [10] Rates of DHA production in women are 15% higher than in men. [11] DHA is a major fatty acid in brain phospholipids and the retina. Preliminary research has investigated its potential benefit in Alzheimer's disease, [1] [12] and cardiovascular disease, [13] and other disorders. [1]
This page lists the world fisheries' production. ... South Africa: 473,451 11,355 ... World fish production; References
[2] [3] The three types of omega−3 fatty acids involved in human physiology are α-linolenic acid (ALA), eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA). ALA can be found in plants, while DHA and EPA are found in algae and fish. Marine algae and phytoplankton are primary sources of omega−3 fatty acids. [4]
Because of their high protein content, large size, rapid growth (6 to 7 months to grow to harvest size), [3] and palatability, a number of coptodonine and oreochromine cichlids—specifically, various species of Coptodon, Oreochromis, and Sarotherodon—are the focus of major aquaculture efforts. Tilapia fisheries originated in Africa and the ...
World capture fisheries and aquaculture production by species group [1] This is a list of aquatic animals that are harvested commercially in the greatest amounts, listed in order of tonnage per year (2012) by the Food and Agriculture Organization. Species listed here have an annual tonnage in excess of 160,000 tonnes.