Knowra Cichlid Cichlid A cichlid is a freshwater fish in the family Cichlidae, native mainly to Africa and Central and South America. Many species have specialized jaws, parental care, and remarkable ecological diversity.
Cichlidae : Cichlidae is the family of freshwater fishes that includes cichlids. This family classification groups the species whose diversity defines cichlids.
Adaptive radiation : The diversification of one ancestral lineage into multiple species adapted to different ecological niches. Cichlid lineages have diversified into many feeding and habitat niches, especially in African lakes.
Lake Victoria : An African Great Lake shared by Tanzania, Uganda, and Kenya. Its cichlid radiation produced hundreds of endemic species before major ecological disruption.
Cyprinidae : A large family of freshwater fishes that includes carps, minnows, and barbs. Unlike cichlids, cyprinids lack the specialized pharyngeal-jaw system associated with cichlid feeding.
Sexual selection in cichlids : The effects of mate choice and competition on cichlid reproduction and evolution. Researchers examine how mate preferences contribute to species divergence, especially in clear-water lakes.
Pharyngeal jaw : A second set of jaws in the throat, formed from modified gill-arch bones. Cichlids use these jaws to process prey and exploit distinct food sources.
Speciation : The evolutionary process by which populations become distinct species. Cichlid species provide examples of rapid diversification and barriers to interbreeding.
Lake Malawi : An African Great Lake in the East African Rift, known for its exceptional fish diversity. Its haplochromine cichlids include many closely related species with varied feeding adaptations.
Centrarchidae : A family of freshwater fishes that includes bass, sunfish, and crappies. Centrarchids resemble cichlids in some habitats and parental behaviors but belong to a different family.
Hybridization : Reproduction between genetically distinct populations or species, producing mixed ancestry. Hybridization can create variation but may also blur boundaries among closely related cichlids.
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