Schizothorax plagiostomus

Last updated

Schizothorax plagiostomus
Schizothorax plagiostomus.jpg
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Cypriniformes
Family: Cyprinidae
Subfamily: Barbinae
Genus: Schizothorax
Species:
S. plagiostomus
Binomial name
Schizothorax plagiostomus
Heckel, 1838 [1]
Synonyms
  • Oreinus plagiostomus(Heckel, 1838)
  • Schizothorax sinuatusHeckel, 1838
  • Oreinus sinuatus(Heckel, 1838)
  • Oreinus griffithii McClelland, 1842

Schizothorax plagiostomus is a species of ray-finned fish in the genus Schizothorax . Schizothorax plagiostomus locally known as khont, snow trout, snow carp, snow barbel and Swati fish [2] has an elongated sub cylindrical body with short, blunt and slightly prognathous upper jaw. Ventral surface of head and anterior part of body flattish, short, somewhat cone shaped and blunt. Snout usually smooth covered with warys in male. Interorbital space broad and flat. Mouth inferior, wide and slightly arched; lips fleshy and continuous, marginally sharply attenuated, lower lip papillae and reflected from jaw, margin of lower lip sharp, covered with firm and hard horny cartilage; a strip of papillae labial plate at chin present. Barbless two pairs. Pharyngeal teeth in three rows. Dorsal fin inserted about opposite to pelvic fins, its last undivided ray osseous, strong and serrated posterior, short than head. Caudal fin deeply emarginated. Scales very small and elliptical; lipids irregular.

Geographically S. plagiostomus spread in different rivers, and tributaries throughout Himalaya extending to confines of China, Afghanistan, Pakistan, Turkistan, Nepal, Ladkah, Tibet, Bhutan and north-eastern India (Day, 1958). In India, S. plagiostomus is the most important food fish of the Himalayan region, including Kashmir, Himachal Pradesh, Uttarakhand, the Uttar Pradesh foothills and Assam (Day, 1958). It also plays an important role in commercial fish production (Bahuguna, 2002). From the subfamily Schizothorancinae 12 species are reported from Pakistan . The schizothoracine fishes provide a good material to study patterns of evolutionary modifications in terms of their biogeographic distribution. These species are expert in fast running high-elevation streams and rivers and show remarkable fitness for their environment. The Genus Schizothorax (Heckel, 1838) is one of the most diversified and abundant group with 68 species around Central Asia, Himalayas, Pakistan, India and Tibetan Plateau. Snow trout, Schizothorax plagiostomus(Heckel, 1838) is the most important food fish of different rivers, lakes and tributaries throughout Himalayas extending to parts of China, Afghanistan, Nepal, Bhutan, North East India, Kashmir and northern areas of Pakistan including River Panjkora Dir Upper. Upper parts of River Panjkora especially Kumrat Valley (From Thal to Chukyatan) Schizothorax were one found very abundantly, but due to a massive viral outbreak in June, 2016, its populations reduced drastically.

According to Raizada (1985) S. plagiostomus weighs up to 2.5 kg and reaches 60 cm in length. It is sexually mature at 18–24 cm length and spawns in natural and artificial environments in two seasons, September–October and March–April. It spawns naturally in clear water on a gravelly or fine pebbled bed at 10–30 cm depth. Water current of 2.8–4 m/s, pH 7.5, dissolved oxygen concentrations Of 10–15 mg/L and gravel size of 50–60 mm are the optimum conditions for spawning. In the almost similar appearance of schizothorancine fishes, S. plagiostomus can be separated by its short, deep cornified lower jaw, with a transverse or sometimes only slightly curved sharp cutting margin. The lower and upper lips are connected by a smooth rounded corner. The particular arrangement of lower jaw structure was referred to as “sector mouth”

Related Research Articles

<i>Salvia hians</i> Species of plant

Salvia hians is a mound-forming perennial, native to the Himalayas from Pakistan to Bhutan. It is common in Kashmir, growing at elevations from 2,400 to 4,000 m on open slopes and forests. The plant was described in 1830 by John Forbes Royle, a British botanist living in India who studied the medicinal properties of Himalayan plants.

<span class="mw-page-title-main">Panjkora River</span> River in Khyber Pakhtunkhwa, Pakistan

The Panjkora River is a river in the Khyber Pakhtunkhwa province in north-west Pakistan. The river runs through the mountainous northern part of the province, and forms the Kumrat Valley. It passes from Dir, Timergara, and joins with Swat River at Chakdara. It is generally characterized by having steep slopes on either side of the riverbank covered in thick forests. The river has a large catchment area, making the river susceptible to significant flooding – most notably during the 2010 floods that occurred throughout much of Pakistan.

This glossary of ichthyology is a list of definitions of terms and concepts used in ichthyology, the study of fishes.

<i>Schizothorax</i> Genus of fishes

Schizothorax is a genus of cyprinid fish found in southern and western China, through northern South Asia (Himalaya) and Central Asia, to Iran, with a single species, S. prophylax, in Turkey. They are primarily found in highland rivers, streams and lakes, although a few species occur in lower-lying locations, like Lake Balkhash and lakes of the Sistan Basin. Their scientific name means "cloven-breast", from Ancient Greek schízeïn (σχίζειν) 'to cleave' and thórax (θώραξ) 'breast-plate'. The western species are typically referred to as marinkas from their Russian name marinka (маринка), while the eastern species are usually called snowtrout. Although they do resemble trouts in habitus this is merely due to convergent evolution and they are by no means closely related apart from both being Teleostei: Cyprinids are in the teleost superorder Ostariophysi, while trouts are in the superorder Protacanthopterygii. Their ancestors must thus have diverged as early as the Triassic, more than 200 million years ago.

<i>Synodontis granulosus</i> Species of fish

Synodontis granulosus is a species of upside-down catfish endemic to the Democratic Republic of the Congo, Burundi, Zambia, and Tanzania, where it is only known from Lake Tanganyika. It was first described by Belgian-British zoologist George Albert Boulenger in 1900, from specimens collected at multiple points along the shore of Lake Tanganyika. The species name comes from the Latin word "granulum", meaning of grain, and refers to the granular papillae present on the skin of the fish's body.

<i>Synodontis petricola</i> Species of fish

Synodontis petricola, known as the cuckoo catfish, or the pygmy leopard catfish, is a species of upside-down catfish endemic to Burundi, Zambia, the Democratic Republic of the Congo, and Tanzania where it is only known from Lake Tanganyika. It was first described by Belgian ichthyologist Hubert Matthes in 1959. The species name "petricola" is derived from a combination of the Latin petra, meaning stone or rock, and the Latin cola, meaning inhabitant. This refers to the rocky environment where this species is found.

<i>Synodontis frontosus</i> Species of fish

Synodontis frontosus, known as the Sudan squeaker, is a species of upside-down catfish that is widely distributed throughout northern and central Africa. It has been reported in Chad, Democratic Republic of the Congo, Ethiopia, Kenya, Somalia, Sudan, and Uganda. It was first described by French zoologist Léon Vaillant in 1895, from specimens collected in the White Nile in Sudan. The species name frontosus is Latin, and means "broad head".

<i>Synodontis zambezensis</i> Species of fish

Synodontis zambezensis, known as the brown squeaker, the korokoro, or the plain squeaker, is a species of upside-down catfish that is native to the middle and lower Zambezi River system of Eswatini, Mozambique, South Africa, Tanzania, Zambia and Zimbabwe. It was first described by German naturalist and explorer Wilhelm Peters in 1852, from specimens collected in the Zambezi River in Mozambique. The species name zambezensis is derived from the Zambezi River, where this species is found.

Synodontis lucipinnis is a species of upside-down catfish endemic to Zambia, where it is only known from the Musende Rocks area (Mpulungu) of Lake Tanganyika. It was first described by Jeremy John Wright and Lawrence M. Page in 2006. The species name "lucipinnis" is derived from a combination of the Latin luci, meaning bright or clear, and the Latin pinnis, meaning fin. This refers to the light coloration in a patch on the base of the fins of this species.

<i>Catostomus discobolus</i> Species of fish

The bluehead sucker is endemic to the intermountain Western US. A total of 23 members of the genus Catostomus has been found in North America. C. discobolus and C. yarrowi are two sister species that have very similar Arizona habitats.

The Balkhash marinka, is a species of ray-finned fish in the genus Schizothorax of the family Cyprinidae which is found in the Lake Balkhash basins in Kazakhstan and Xinjiang. It uses gravel substrates for spawning and the unshed roe is toxic.

<span class="mw-page-title-main">Common snowtrout</span> Species of fish

The common snowtrout or snowtrout, also known as "Asala", or "Asela" by the locals, is a species belong to the class of ray-finned fishes, family Cyprinidae, order Cypriniformes in the genus Schizothorax. The genus name Schizothorax is derived from Greek word, "schizein" meaning to divide, and "thorax" which means breast.

<span class="mw-page-title-main">Chirruh snowtrout</span> Species of fish

The Chirruh snowtrout is a species of cyprinid fish found in the Himalyays in Pakistan, India, Afghanistan, Nepal and China.

<i>Schizopygopsis</i> Genus of fishes

Schizopygopsis is a genus of cyprinid fish. Most species are endemic to river basins in the Himalayas and Qinghai–Tibet Plateau of China, but S. stoliczkai extends into the highlands of Afghanistan, Iran, northern India, Kyrgyzstan, Pakistan and Tajikistan.

The roughnose stingray is a little-known species of stingray in the family Dasyatidae, generally found in shallow, estuarine waters associated with mangroves off Borneo, Sumatra, and possibly Java. Growing to 72 cm (28 in) across, this species has a rhomboid pectoral fin disc and a whip-like tail with a ventral fin fold. It is characterized by its pointed snout, which is covered by dermal denticles. Reproduction is aplacental viviparous, with females possibly bearing as few as one pup at a time. The International Union for Conservation of Nature (IUCN) has assessed the roughnose stingray as Endangered; it is threatened by overfishing and the destruction and degradation of its mangrove habitat.

<span class="mw-page-title-main">Ha Chhu</span> River in Bhutan

The Ha Chhu is a river in west-central Bhutan, it is a tributary of the Raidak River.

The Philippines angelshark is a species of angelshark, family Squatinidae, known only from a 33 cm (13 in) long immature female caught in the Philippines, where it is the only known representative of its family. It has a flattened body and head with greatly expanded pectoral and pelvic fins, and is greenish above with brown spots. Identifying traits of this species include the spiracles, which are more widely spaced than the eyes and bear papillae on the posterior inner rims, and the relative positions of the two dorsal fins. Additionally, S. caillieti lacks fringes on its barbels, enlarged thorns along the middle of its back, and ocelli ("eyespots") on its fins.

<span class="mw-page-title-main">Sind River</span> River in Indian-administered Jammu and Kashmir, tributary of the Jhelum River

The Sind River or the Sindh River is a river in the Ganderbal district of the union territory of Jammu and Kashmir, India. It is a major tributary of the Jhelum River and is 108 kilometres long.

<i>Synodontis melanostictus</i> Species of fish

Synodontis melanostictus is a species of upside-down catfish endemic to Lake Tanganyika and its tributaries. It has been found in Zambia, the Democratic Republic of the Congo, and Burundi. It was first described by British-Belgian zoologist George Albert Boulenger in 1906, based upon a specimen from the Lofubu River. The species name "melanostictus" is derived from a combination of the Greek melano, meaning black, and the Greek stiktos, meaning punctured or spotted. This refers to the black spotted pattern that occurs on the body of this species.

<span class="mw-page-title-main">Modi River</span> River

Modi River or Modi Khola is a tributary of Gandaki River in Parbat district of Nepal. It is a snow-fed perennial river originating from Annapurna Mountains and has a catchment area of 675 km2. It meets the Kali Gandaki River at Modi Beni of Parbat District. The total length of the river is approximately 50km. The main tributaries of Modi river are Bhurangdi Khola, Rati Khola, Pati Khola, Malyangdi Khola, Ghandruk Khola and Ambote Khola. The mean annual precipitation in the basin is approximately 2700mm and 80% of the total annual rainfall occurs during the monsoon.

References

  1. Froese, Rainer; Pauly, Daniel (eds.) (2006). "Schizothorax plagiostomus" in FishBase. April 2006 version.
  2. 7. Arif Jan., Rab, A., Ullah, R, Haroon, and Ullah, I. (2017). On the Breeding Season of Schizothorax plagiostomus. Pakistan J. Zool., vol. 49(2), pp 1-3.