cavefish


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cavefish,

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.
References in periodicals archive ?
Many surface-dwelling fish occasionally enter caves, but true cavefish have evolved over many millennia to spend their lives underground in complete darkness.
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.
Finally, even though Belostoma readily feed on cavefish in an experimental setting and can occasionally be observed in situ capturing fish (Fig.
The blind Mexican cavefish (Astyanax mexicanus) have not only lost their sight but have adapted to perpetual darkness by also losing their pigment (albinism) and having altered sleep patterns.
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.
The ability of these blind cavefish to detect objects and navigate inspired the research group to mimic the hairs in the laboratory, said Vladimir Tsukruk, a professor in Georgia Tech's School of Materials Science and Engineering.
It is unknown what specific host life cycle is followed in this cave environment since other potential second intermediate hosts are found within, including southern two-lined salamanders, Eurycea cirrigera, northern green frogs, Lithobates (Rana) clamitans melanota, American bullfrogs, Lithobates (Rana) catesbeianus, and the southern cavefish, Typhlichthys subterraneus.
One acute pollution event, even if detected by proposed monitoring stations, could not be stopped from reaching Key Cave, and could lead to the death of Alabama cavefish.
Federally listed threatened or endangered species and species of concern that benefit from the refuge are the endangered Ozark big-eared bat (Corynorhinus townsendii ingens), gray bat (Myotis grisescens), and Indiana bat (Myotis sodalis); the threatened Ozark cavefish (Amblyopsis rosae); and species of concern like the eastern small-footed bat (Myotis leibii), southeastern bat (Myotis austroriparius), southeastern big-eared bat (Corynorhinus rafinesquii), longnose darter (Percina nasuta), Ozark cave crayfish (Cambarus aculabrum), Bowman's cave amphipod (Stygobromus bowmani), Ozark cave amphipod (Stygobromus ozarkensis), bat cave isopod (Caecidotea macropoda), and Ozark chinquapin (Castanea pumila var.