ANS18-10-L10-TILAPIA-CULT

ANS18-10-L10-TILAPIA-CULT - Tilapia introduced into more...

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Tilapia introduced into more than 90 countries on all the continents except Antarctica American Tilapia Association - http://ag.arizona.edu/azaqua/ata.html Rakocy (eds). World Aquaculture Society ; American Tilapia Association, Baton Rouge, LA. Webster (eds)/. Food Products Press, New York
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What s in a name? tilapias belong to the family Cichlidae, the dominant fishes of tropical lakes. > 70 species Dr. Ethelwynn Trewavas originally proposed two genera based on food habits, as reflected in the dentition and distance between gill-rakers, and reproductive behavior (Trewavas, 1992). Tilapia- those species that are macrophagous and substrate-spawners. The gill rakers of these species are robust and widely spaced with the dentition consisting of chisel shaped teeth for chewing. Sarotherodon- those species that are microphagous and mouth-brooders. Both the gill rakers and teeth of these species are thin and closely spaced to rake algae from the water column.
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parental care, and the division between substrate-spawners versus mouthbrooders is complicated by the fact that the mouthbrooders include some species that spawn in nests on the bottom but brood the eggs in the mothers mouth. Thus, in an addendum to her paper, Trewavas suggested a third genus: Oreochromis- Species in this genus are those commonly used in aquaculture. They are all microphagous but only mouthbrood the eggs after they are laid on substrate.
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This note was uploaded on 03/25/2011 for the course ANS 18 taught by Professor Mchenry during the Spring '11 term at UC Davis.

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ANS18-10-L10-TILAPIA-CULT - Tilapia introduced into more...

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