Freshwater Aquarium Fish Species Profile: African Cichlid

The African jewelfish (), also known as jewel cichlid or jewelfish, is from the family .
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The phylogenetic analyses using LSU rDNA sequences performed in this study placed in basal position Cichlidogyrus pouyaudi parasitizing Tylochromis intermedius, which suggests that this parasite diverged earlier than the other Cichlidogyrus and Scutogyrus species. Cichlidogyrus pouyaudi was originally described from Tylochromis jentinki in West Africa , where it was observed that the structure of the dorsal transverse bar of this parasite species is different of the other Cichlidogyrus species. Pariselle and Euzet suggested that such haptor morphology represents an archaic feature in Cichlidogyrus species living on ancient cichlid fish such as Tylochromis species.
Fish information on Peacock Cichlids, Aulonocara types of cichlids from Lake Malawi, their habitats and keeping African cichlids tanks.
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a, locus showing the conservation track and alignment of an hCNE (LG18.20714) in and East Africa cichlids. b, Reporter gene expression in 72 hours post-fertilization (hpf) G1 transgenic zebrafish. Expression is shown for the hCNE in and the corresponding aCNE in . The aCNE also shows expression in circulating blood cells. Fish information on Peacock Cichlids, Aulonocara types of cichlids from Lake Malawi, their habitats and keeping African cichlids tanks.
Photo provided by FlickrAfrican Cichlid Fish Species
Photo provided by FlickrFish information on Peacock Cichlids, Aulonocara types of cichlids from Lake Malawi, their habitats and keeping African cichlids tanks.
Photo provided by Flickr
Scientists say they have now uncovered a second evolutionary hot spot for these fish. The experts have traced the origins of cichlids in rivers across southern Africa to a single lake that no longer exists. African cichlid fish represent an unusual variety of evolutionary divergence. By analyzing the genomes of some of these species, Russell Fernald and others have provided insight into the genetic mechanisms that drive species diversification.In African cichlid fish society, only the dominant male reproduces. But Stanford researchers have found that if the dominant male disappears, a subordinate cichlid can rise to the procreative occasion with stunning speed, having kept its reproductive apparatus idling in low gear for the occasion. Other species, including mammals with similar social structures from mice to rhinos, may use the same approach.For decades biologists have identified African cichlid fish as an interesting family of animals for studying how species variation works. The 2,000-plus species of related fish in the African lakes alone represent tremendous morphological variations that allow them to live in niche habitats.Analysis of the genome of Astatotilapia burtoni, an African cichlid fish studied in Russell Fernald's lab, hints at how species diverge through adaptive radiation.The electric yellow cichlid is a popular fresh water aquarium fish. It is a naturally occurring variant of . endemic to the central western coastal region of in in East . It is the most popular African cichlid amongst aquarium hobbyists. These fish are mouthbrooders; the female lays her eggs on the surface of rocks and then scoops them into her mouth where they brood for 18 days before being released."You can't just go in and sacrifice a rhinoceros and see how its testes are working," Fernald said. Hence his lab's focus on the African cichlid, a relatively small fish native to Lake Tanganyika in East Africa. More abundant than rhinos and much less dangerous, but practicing social suppression in a way fundamentally similar to rhinos and other animals, cichlids make an excellent model for study. First and foremost, African cichlids are prized and adored for their beautiful coloration. You cannot find freshwater fish that are more colorful than these fish from East Africa. And, you cannot find a saltwater fish with color equal to African cichlids for even half the price. Look at this picture of a Lake Victoria Hap, for example. Can you find a color of the rainbow that he doesn’t display? Green is probably the only color. And this is just one of over a thousand colorful species.