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common name for blind, cave-dwelling fishes of the family Amblyopsidae. The Amblyopsidae are mostly whitish fish, up to 5 in. (13 cm) long. With the exception of a single species, all members of the family live in the limestone cave region of the Mississippi basin. The species that live in caves have nonfunctioning rudimentary eyes. Two species, the springfish and the ricefish (or riceditch killifish), have small, functional eyes. The ricefish, which superficially resembles the toothed minnow, is found in streams and swamps of the SE United States. Other, unrelated fish also live in cave and have rudimentary or nonexistent eyes. The cavefish and their relatives 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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, subphylum Vertebrata, class Actinopterygii, order Percopsiformes, family Amblyopsidae.
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References in periodicals archive ?
NJIT joined with Louisiana State University and the University of Florida to examine the phylogenomic relationships, morphology, biomechanics and walking performance of the blind cavefish and its relatives, from an evolutionary perspective.
Flushing artificial bloodlike fluid over excised brains and eyes allowed the team to compare the demands of vision-related body parts in blind cavefish with the demands in tetras with fully functioning eyes.
Kowalko et al., "Cryptic variation in morphological evolution: HSP90 as a capacitor for loss of eyes in cavefish," Science, vol.
Finally, even though Belostoma readily feed on cavefish in an experimental setting and can occasionally be observed in situ capturing fish (Fig.
The cave lakes have a genetically blind and albinic cavefish.
That potential change to traffic patterns is somewhere out in the future and dependent on, among other things, the potential impact of stormwater drainage on the habitat of the Ozark Cavefish.
Washington, Jan 23 ( ANI ): Several populations of cavefish have constantly and independently, lost their eyesight and pigmentation, which is a remarkable example of convergent evolution, researchers say.
For example, Reif (1985) investigated the morphogenesis and function of the squamation of sharks, Hill (1971) the appearance of scales and patterns of squamation on an actinopterygian, the spring cavefish (Forbesichthys agassizii (Putnam)), Sire & Akimenko (2004) scale development and squamation pattern in another actinopterygian zebra danio (Danio rerio (Hamilton)).
Cave biologists spotlight the most obvious adaptations by distinguishing among three types of cave animals: Troglobites (or troglobionts) like tiny cavefish dwell in caves and nowhere else; troglophiles may live in caves most of the time or in similar environments outside; trogloxenes spend time inside and outside caves.
Topics include geographic distribution of cavefish, biology of cavefish including cellular mechanisms of eye degeneration, reproduction timing, male mating behavior, migratory neural crest cells, gut contents in relation to prey densities, conservation of subterranean fishes, and genetic diversity of cavefish populations.