Garra | |
---|---|
Doctor fish (Garra rufa) | |
Scientific classification | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Chordata |
Class: | Actinopterygii |
Order: | Cypriniformes |
Family: | Cyprinidae |
Subfamily: | Labeoninae |
Genus: | Garra F. Hamilton, 1822 |
Type species | |
Cyprinus (Garra) lamta F. Hamilton, 1822 | |
Synonyms | |
AgeneiogarraGarman, 1912 Contents |
Garra is a genus of fish in the family Cyprinidae. These fish are one example of the "log suckers", sucker-mouthed barbs and other cyprinids commonly kept in aquaria to keep down algae. The doctor fish of Anatolia and the Middle East belongs in this genus. [1] The majority of the more than 160 species of garras are native to Asia, but about one-fifth of the species are from Africa (East, Middle and West, but by far the highest species richness in Ethiopia). [2] [3]
The genus was established by Francis Buchanan-Hamilton in 1822 as a subgenus of Cyprinus (which at that time was a "basket genus" for carp-like cyprinids); though it didn't lead to an act of him to designate a type species by the time. However, as no other garras except the newly discovered G. lamta were known to science in 1822, this was designated as the type species by Pieter Bleeker in 1863. The garras and their closest relatives are sometimes placed in a subfamily Garrinae, but this seems hardly warranted. More often, this group is included in the Labeoninae, or together with these in the Cyprininae. In the former case, the garras are members of the labeonine tribe Garrini, in the latter they are in the subtribe Garraina of tribe Labeonini. The genus Discogobio is a close relative. [3]
These species are slim cyprinids with a flat belly and a sucking mouth; their shape indicates that they are at least in tendency rheophilic. They are distinguished from other cyprinids by a combination of features: As in their closest relatives, their lower lip is expanded at its posterior rim to form a round or oval sucking pad, the vomero-palatine organ is much reduced or completely lost, the pectoral fins have at least the first two rays enlarged and usually unbranched, the supraethmoid is wider than long when seen from above, and the cleithrum is narrow and elongated to the front. [3]
From other Garrini (or Garraina), the genus Garra can be distinguished as follows: their pharyngeal teeth are arranged in three rows (like 2,4,5–5,4,2), the dorsal fin has 10-11 rays and starts slightly anterior to the pelvic fins, while the anal fin starts well behind the pelvic fins and has 8-9 rays. As far as is known, the diploid karyotype of garras is 2n = 50. [3]
Garras are not or barely noticeably sexually dimorphic and generally cryptically coloured benthic freshwater fish. Six species in the genus ( G. andruzzii , G. dunsirei , G. lorestanensis , G. tashanensis , G. typhlops and some populations of G. barreimiae ) are cave-adapted, lacking pigmentation and/or eyes. [4] [5] [6] [7] Garras are omnivorous, eating alga, plankton and small invertebrates that they suck off substrate like rocks or logs. The food is scraped off with the sharp keratinized borders of the jaws and ingested via suction, created by contracting and relaxing the buccopharynx. As typical for Cypriniformes, the garras lack a stomach entirely, their oesophagus leading directly to the sphincter of the intestine. Different Garra species eat animal and vegetable matter in different proportions, which can – as typical for vertebrates – usually be recognized by the length of their intestine compared to related species: more herbivorous species have a longer intestine. Indeed, intestinal length in this genus is remarkably constant within species and varies a lot between species, meaning that it is useful to distinguish species and that dietary shifts have played a significant role in the evolution of garras. [3]
When the females are ready to spawn, they are markedly plump and swollen; the ripe roe may fill almost four-fifths of their body cavity. The testicles of reproductive males are large too. The average Garra egg is 1.77 mm in diameter and a clutch contains several hundred eggs – up to a thousand or so in large females. The breeding behaviour is generally not well known and breeding is not often achieved in the aquarium; presumably, like many of their relatives they migrate upstream or (if they otherwise inhabit lakes) into the rivers to spawn. [3]
These are the currently recognized species in this genus:
Devario is a genus of fish in the family Cyprinidae native to the rivers and streams of South and Southeast Asia. These fishes have short barbels and many species having vertical or horizontal stripes. These species consume various small, aquatic insects, crustaceans and worms, as well as, in the case of fry, plankton.
Glyptothorax is a genus of catfishes order Siluriformes of the family Sisoridae. It is the most species-rich and widely distributed genus in the family with new species being discovered on a regular basis. These species are distributed in the Black Sea basin, northern Turkey, south and east to the Yangtze River drainage in China and south throughout Indo-China to Java, Indonesia. They are found in Asia Minor and southwards to Southeast Asia. The genus is very diverse in the Indian subcontinent. Southeast Asian species tend to have restricted distributions.
Mystus is a genus of fish in the family Bagridae native to Asia. Phylogenetic relationships within this genus are poorly understood, though it has been suggested that there are two major lineages.
Alburnoides is a genus of cyprinid fishes native to Europe and Asia. Many species are known as riffle minnows or spirlins.
Alburnus is a genus of fish in the family Cyprinidae, the carps and minnows. They are known commonly as bleaks. A group of species in the genus is known as shemayas. The genus occurs in the western Palearctic realm, and the center of diversity is in Turkey.
Capoeta, also known as scrapers, is a genus of fish in the family Cyprinidae found in Western Asia. The distribution extends from Turkey to the Levant, to Transcaucasia, Iraq, Turkmenistan, in Armenia, particularly in lake Sevan and northern Afghanistan. This genus is most closely related to Luciobarbus and in itself is divided into three morphologically, biogeographically and genetically distinct groups or clades: the Mesopotamian clade, the Anatolian-Iranian clade and the Aralo-Caspian clade. The Mesopotamian clade was split off to Paracapoeta in 2022.
Garra typhlops, also known as the Iran cave barb is a species of ray-finned fish in the family Cyprinidae. It is endemic to caves in Iran. Like other cave-adapted fish, it is blind and lacks pigmentation.
Eidinemacheilus smithi, also known as the Zagroz blind loach, is a species of loach in the family Nemacheilidae. This cavefish is endemic to an aquifer in the Karun River drainage in the Zagros Mountains of Iran.
Garra widdowsoni, commonly known as the Iraq blind barb or Haditha cave garra, is a species of cyprinid fish endemic to underground water systems near Haditha in Iraq. Although traditionally placed in its own genus Typhlogarra, this is not supported by genetic evidence, leading to its move to genus Garra. This cavefish is considered critically endangered because of water extraction, which has lowered the groundwater level. Once abundant, a survey in 2012 found that it now was very rare. Another species from the same place, Caecocypris basimi, may already be extinct. The only other known cavefish in Iraq is Eidinemacheilus proudlovei.
Danio erythromicron, often known as emerald dwarf danio and emerald dwarf rasbora, is a species of cyprinid fish which is endemic to Inle Lake in Myanmar.
Labeoninae is a doubtfully distinct subfamily of ray-finned fishes in the family Cyprinidae of order Cypriniformes. They inhabit fresh water and the largest species richness is in the region around southern China, but there are also species elsewhere in Asia, and some members of Garra and Labeo are from Africa. They are a generally very apomorphic group, perhaps the most "advanced" of the Cyprinidae. A common name for these fishes is labeonins or labeoins.
Psilorhynchus is a genus of ray-finned fish in the family Psilorhynchidae native to South Asia. This genus is the only member of its family. The members of Psilorhynchus are small benthic fishes which occur in rivers and streams with fast to swift currents, hence they are often referred to as torrent minnows. They are distributed in southern Asia, in the Indo-Burma region and the Western Ghats.
The least rasbora or exclamation point rasbora is a species of ray-finned fish in the genus Boraras, native to freshwater habitats in mainland southeast Asia. This species is very small, ranging from 12 to 16 mm.
Hypselobarbus is a genus of fish in the family Cyprinidae endemic to India.
Aborichthys is a genus of stone loaches found in streams of India with one species also found in Myanmar.
Pethia is a genus of small freshwater fish in the family Cyprinidae native to South Asia, East Asia and Mainland Southeast Asia. Some species are commonly seen in the aquarium trade. The name Pethia is derived from the Sinhalese "pethia", a generic word used to describe any of several small species of cyprinid fishes. Most members of this genus were included in Puntius, until it was revised in 2012.
Garra magnidiscus is a species of cyprinid fish in the genus Garra. Identified in 2013, Garra m. is found in the Upper Siang district of Arunachal Pradesh where is it is known locally as Ngop. The name magnidiscus refers to a distinctive large adhesive disc found in the posterior region of its mouth.
Fang Fang Kullander, née Fang Fang, was a Swedish-Chinese ichthyologist.
Garra alticaputus is a species of cyprinid fish in the genus Garra described from the Dikrong River at Boorum village Itanagar, Arunachal Pradesh, India.
Garra minimus is a species of cyprinid fish in the genus Garra described from the Ranga River, Lower Subansiri District, Arunachal Pradesh, India.