characin


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characin

(kâr`əsĭn) or

characid

(–sĭd), common name for members of the Characidae, a large and diverse family comprising 700 species of freshwater fishes. The characins are related to the carp and the catfish. They are found in Africa and in tropical America, especially in the Amazon. Most species are active and predacious. Most notorious are the piranhas, or caribes (Serrasalmus species), although some authorities class these in a separate family, Serrasalmidae. With their powerful jaws and razor-sharp triangular teeth, piranhas are capable of killing humans and cattle, though such deadly attacks are rare. Various small, colorful characin species, called tetras, are used in aquariums. A small characin found in Mexican streams is interesting for the stages of blindness it exhibits: those living deep in caves are eyeless; those found near the entrance have imperfect eyes; and the specimens living in open water have normal eyes. A cross of a blind with a normal specimen produces offspring with varying degrees of eye degeneracy. Characins are classified in the phylum ChordataChordata
, phylum of animals having a notochord, or dorsal stiffening rod, as the chief internal skeletal support at some stage of their development. Most chordates are vertebrates (animals with backbones), but the phylum also includes some small marine invertebrate animals.
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, class Actinopterygii, order Cypriniformes, family Characidae.
References in periodicals archive ?
Eigenmann and Ogle (1907) wrote "In the difficult and highly interesting group of characins there is no more difficult nor more interesting genus than Astyanax." They further noted that a widely variable group of related species in Central America and Mexico, centering upon Astyanax rutilus, would require much larger series to determine their status.
melanopterus Mueller and Troschel, Teleostei: Characoidei), a tropical characin from the central Amazon.
The most abundant species was the tetra Astyanax eigenmanniorum (52.9%), the second most abundant was the silverside Odontesthes bonariensis (29.3%) and the third most abundant was the pike characin Oligosarcus jenynsii (13,6%).
It has a bright silver colour which darkens on the dorsal surface with relatively large eyes, typical of characins. Gross morphological investigations revealed that the oral cavity opens through a fleshy-lipped terminal small mouth (Figure 2(a)).
Preliminary description of new genera and species of tetragonopterid characins. Bulletin of Museum of Comparative Zoology 52: 93-106.
In quantity terms, aquaculture production has been dominated by species that feed low on the food chain in their natural habitats, such as carp, characins and tilapias.
Washington, July 13 ( ANI ): Male representatives of the tropical fish known as swordtail characins have flag-like sex ornaments that catch mates just like the bait on a fishing rod would, according to a new study.
Effects of dietary supplementation of carotenoids on survival, growth, pigmentation and antioxidant capacity of characins, (Hyphessobrycallistus).
galilaeus), which like all plankton-eating fish have increased spectacularly in number and size, are the most abundant, followed by characins (family Characidae) such as Hydrocynus forskalii, Alestes nurse, A.