Biology:Channa gachua
| Channa gachua | |
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Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Actinopterygii |
| Order: | Anabantiformes |
| Family: | Channidae |
| Genus: | Channa |
| Species: | C. gachua
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| Binomial name | |
| Channa gachua (F. Hamilton, 1822)
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| Range map | |
| Synonyms[2] | |
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Channa gachua, the dwarf snakehead, is a species of fish in the family Channidae. The name "dwarf snakehead" is also used for several other species of small snakeheads. C. gachua is native to freshwater habitats in southern Asia, where it has a wide distribution from Iran to Indonesia. This fish is considered to be a species complex, a group of several closely related taxa with one name. It is likely at least three to four different species, and further research may differentiate them.[1] A few species such as Channa harcourtbutleri have been separated from the complex in recent decades.[3] The easternmost population of C. gachua is often recognized as a separate species C. limbata , while the isolated Sri Lankan population often is recognized as C. kelaartii.[4][5]
Description
This species can reach 28 cm (11 in) in total length, but most individuals are much smaller.[2] It feeds on small fish, insects, and crustaceans. It is a mouthbrooder, with the male brooding the eggs and juveniles in his mouth.[2] Males have more-extended dorsal and anal fins than females, and develop more intense color pattern.[6]
Distribution and taxonomy
The species was recorded from Iran, Afghanistan, Pakistan, Nepal, India, Sri Lanka, Bangladesh, Bhutan, China, Myanmar, Thailand, Laos, Cambodia, Viet Nam, Malaysia, Indonesia, and Singapore.[7] This is a common fish found in most any type of wetland.[1] It can live in large rivers or small brooks and creeks, in fast currents or stagnant waters, and in altered waterways such as canals.[2] It also lives in rice paddies.[8]
There is a distinct genetic split between western and eastern populations (the distribution of the two approach each other in Myanmar). As a consequence some recognize them as separate species with western being C. gachua and eastern C. limbata.[4][5] The isolated Sri Lankan population is also highly distinctive from a genetic point of view, leading some to recognize it as C. kelaartii.[4][5] Despite the deep genetic splits between these populations, their morphology is very similar.[5]
Value
This fish is caught for food in many parts of Asia.[1] This is one of several Channa known as dwarf snakeheads, smaller species kept in aquaria. It is also valued for its attractive coloration.[9] This species has been studied for use in aquaculture operations.[9]
References
- ↑ 1.0 1.1 1.2 1.3 Chaudhry, S. (2010). "Channa gachua". IUCN Red List of Threatened Species 2010: e.T166123A6179047. doi:10.2305/IUCN.UK.2010-4.RLTS.T166123A6179047.en. https://www.iucnredlist.org/species/166123/6179047. Retrieved 20 November 2021.
- ↑ 2.0 2.1 2.2 2.3 Froese, Rainer and Pauly, Daniel, eds. (2019). "Channa gachua" in FishBase. August 2019 version.
- ↑ Ng, H. H., P. K. Ng, and R. Britz. (1999). Channa harcourtbutleri (Annandale, 1918): a valid species of snakehead (Perciformes: Channidae) from Myanmar. Journal of South Asian Natural History 4(1): 57-63.
- ↑ 4.0 4.1 4.2 Eschmeyer, William N.; Fricke, Ron; van der Laan, Richard, eds. "Species in the genus Channa". California Academy of Sciences. http://researcharchive.calacademy.org/research/ichthyology/catalog/fishcatget.asp?tbl=species&genus=Channa.
- ↑ 5.0 5.1 5.2 5.3 Conte-Grand, C., Britz, R., Dahanukar, N., Raghavan, R., Pethi-yagoda, R., Tan, H.H., Hadiaty, R.K., Yaakob, N.S. & Rüber, L. (2017). Barcoding snakeheads (Teleostei, Channidae) re-visited: Discovering greater species diversity and resolving perpetuated taxonomic confusions. PLoS ONE, 12 (9): e0184017.
- ↑ "Channa gachua – Dwarf Snakehead ( Ophicephalus marginatus,Ophicephalus gachua)" (in en-us). Seriously Fish. http://www.seriouslyfish.com/species/channa-gachua/.
- ↑ "Least Snakehead - Channa gachua - Details - Encyclopedia of Life" (in en). http://eol.org/pages/218763/details.
- ↑ Silva, K. (1991). Population ecology of the paddy field‐dwelling fish Channa gachua (Günther) (Perciformes, Channidae) in Sri Lanka. Journal of fish biology, 38(4), 497-508.
- ↑ 9.0 9.1 Milton, J., et al. (2017). Ovarian development and histological observations of threatened dwarf snakehead fish, Channa gachua (Hamilton, 1822). Saudi Journal of Biological Sciences. In Press.
External links
- Channa gachua. World Register of Marine Species (WoRMS).
Wikidata ☰ Q728780 entry
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