Hensley, J.N. It is the user's responsibility to use these data consistent with their intended purpose and within stated limitations. These two species can generally be distinguished by the following characteristics (Trewavas 1983): Table 1. The Mozambique tilapia reaches sexual maturity at a smaller size and younger age than the Nile and Blue tilapias. Courtenay, W.R., Jr., D.A. States with nonindigenous occurrences, the earliest and latest observations in each state, and the tally and names of HUCs with observations†. Reproductively viable hybrids have resulted from these various crosses and thus, for most tilapia populations in the U.S., the use of meristics and traditional systematics to assign species names to specimens is not useful (see: Costa-Pierce 2003). The species is a nest building, batch spawning mouth brooder that can spawn every 30 days. 2010. Hocutt, and E.O. Batches of eggs are spawned into the nest, fertilized externally and then picked up by the female. Arizona Fish and Game Department. Egg size 1.5 mm, larval length at hatching 4 mm. D XVI-XVIII, 12-14, A III, 9-11. Nile tilapia are cheap and so cage culture is not cost-effective ... a market size of 700g in 4 months. 1999), fecundity and egg size, both lations from man-made lakes of Cˆote d’Ivoire. Eating tilapia all the time may help Distribution of exotic fishes in North America. Álvarez Calderón, W.Y. Food grade tilapia are simply those tilapia that exhibit the fastest rates of growth. Checklist of the inland fishes of El Salvador. Nile Tilapia is primarily herbivorous, with aquatic macrophytes, algae, and diatoms generally comprising >90% of its diet and the remainder including aquatic insects and crustaceans and fish eggs (Khallaf and Alne-na-ei 1987). The results showed that the average weight of the fish in the control treatment, increased from 8.13 ± 1.3 g to 14.67 ± 1.3 g with an average weight 6.54 g at the end of the experiment. 675-698 in C.H. The outermost teeth are bicuspid and in adults with stout shafts and obliquely truncate major cusps. References to specimens that were not obtained through sighting reports and personal communications are found through the hyperlink in the Table 1 caption or through the individual specimens linked in the collections tables. For example, the Nile tilapia matures at about 10 to 12 months and 3/4 to 1 pound (350 to 500 grams) in several East African lakes. Alabama Museum of Natural History Bulletin 14:1-266. Woodley, M.L. . 2006. Dorsal fin w… Foundation for Research Development and Council for Scientific and Industrial Research, Pretoria, South Africa. Walls. In the U.S. and other regions where they have been introduced, tilapias have hybridized and introgressed in aquaculture settings and subsequently escaped into the wild. 1986. Williams. 1988. Scales cycloid. Tilapia popula-tions in large lakes mature at a later age and larger size than the same species raised in small farm ponds. Environmental Biology of Fishes 76:283-301. Hill, F. Schulthess, D. Tweddle, A. Chabi-Olay, and H.G. Nile Tilapia is closely related to, and often confused with, Blue Tilapia (O. aureus). McCann. " The two nursery strategies (rearing of Nile tilapia fingerling from size #22 to size #14 and from size #22 to size #10) showed a production cost difference of P5,241.6 or US$95.31 ha-1. Zambrano, L., E. Martínez-Meyer, N. Menezes, and A.T. Peterson. 2007. Figure 2:aw materials for production of R fish feed. Grammer et al. Hensley. For queries involving invertebrates, contact Amy Benson. Nile Tilapia are fast-growing and produce good fillets. Nico, L.G., Schofield, P.J., and Neilson, M.E. Feeding in first week larvae culture, D. magna size was 0.5 mm with density of 1022 D. magna/L. Results revealed that Nile tilapia could select Cyanobacteria and Euglenophyceae at all sizes. Males are highly territorial and defend their nests. The average nest diameter is twice the length of the male making it. The information has not received final approval by the U.S. Geological Survey (USGS) and is provided on the condition that neither the USGS nor the U.S. Government shall be held liable for any damages resulting from the authorized or unauthorized use of the information. Contact us if you are using data from this site for a publication to make sure the data are being used appropriately and for potential co-authorship if warranted. Matamoros, F.S. Impact of Introduction: Nile Tilapia exert competition pressures on native fish and are known to prey on amphibians and juveniles of other fish species (Zambrano et al. ): the need to incorporate invasion science into regulatory structures. Beamish. Muoneke, M.I. Gainesville, Florida. Partyka. Distinguishing charactersBody shape generally laterally compressed to oval and deep, though variable depending on the environment (Figure 1). (2006) found little overlap in the diets of Nile Tilapia and three native centrarchids (Bluegill, A specimen taken from Lake Seminole on the Georgia side of the lake near Saunder's Slough in 1991 was originally reported as. Competitive interactions between invasive Nile tilapia and native fish: the potential for altered trophic exchange and modification of food webs. It tolerates brackish water and survives in temperatures between 46 and 108 °F. Lower pharyngeal with firm teeth in approximately triangular dentigerous area. Voucher specimens: Florida (UF many specimens), Georgia (UF, UGAMNH), Mississippi (MMNH). Sims Printing Company, Inc., Phoenix, AZ. We highly recommend reviewing metadata files prior to interpreting these data. Tongnunui, S., and F.W.H. In many instances the breeding cycle is synchronized with the rainy season. This information is preliminary or provisional and is subject to revision. The economic impact and appropriate management of selected invasive alien species on the African continent. size) and put into plastic packs [54-57] (Figure 2). 2006. Foraging in non-native environments: comparison of Nile tilapia and three co-occurring native centrarchids in invaded coastal Mississippi watersheds. Citation information: U.S. Geological Survey.