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Giant freshwater stingray

Urogymnus polylepis

Gbasara aha ya: The scientific name polylepis comes from the Greek words for 'many' and 'scales'.1

Ọ chọrọ dọkịtaỌ naghị egbukarị egbu, mana ịgba ya chọrọ dọkịta.

Azụ na-agba nsị

ỊgbaNri ya: Anụ

Ihe ize ndụ nye mmadụ: Ọ dị njọỊgba ya chọrọ dọkịta. Ọnwụ anaghị adịkarị ma ọlị.

The giant freshwater stingray is a large ray that lives in big rivers and estuaries in Southeast Asia and Borneo. It is the widest freshwater fish in the world, and it is now endangered because of fishing and habitat loss. It has a long, whip-like tail with a sharp spine near the base.1

Ebe obibi

Large rivers and estuaries of Indochina (such as the Mekong and Chao Phraya) and Borneo1

Eshia

Ụlọ

It lives on the sandy or muddy bottom of large rivers and their estuaries. It is sometimes found near heavily populated urban areas, and individuals are often seen at the edge of the river.1

Ogologo

5 m (16 ft)1

Arọ

300 kg ruo 600 kg (661 lb ruo 1323 lb)1

Ọsọ kacha elu

ihe dị ka 30 km/h (19 mph)

Igwu mmiri, nchepụta

Gịnị ka ọ na-eri?

It eats small fishes and invertebrates such as crustaceans and molluscs that live on the bottom. It finds them using electroreceptors, which sense the weak electrical signals of living animals.1

Foto Giant freshwater stingray — Giant freshwater stingray. Foto: BEDO (Thailand). CC BY-SA 4.0, iNaturalist.

Otú ị ga-esi mata ya

Plain grayish brown on top, often with a yellowish or pinkish tint towards the fin edges1
White underside with broad dark bands on the rear edges of the pectoral and pelvic fins1
Thin, whip-like tail that is black behind the spine and has no fin folds1
Sharply pointed snout that projects beyond the disc1
A single serrated stinging spine on the upper tail near its base, up to 38 cm long1

A na-agwakọkarị ya na: Similar freshwater stingrays in South Asia, Southeast Asia and Australasia were once tentatively grouped with this species. Some of them, such as the Australian Urogymnus dalyensis, are now described as separate species.1

Ike nsị

Ịgba

Nsị na-esi na ndụdụ ya apụta.

Gịnị ka nsị ọ na-agba na-eme?

Its sting is sheathed in toxic mucus. The sting is capable of piercing bone.1

Kedu otú o si dị egwu nye mmadụ?

Ihe ize ndụ nye mmadụ: Ọ dị njọỊgba ya chọrọ dọkịta. Ọnwụ anaghị adịkarị ma ọlị.

The giant freshwater stingray is not aggressive. Its sting is strong enough to pierce bone and is coated in toxic mucus, so it should be treated with care.1

Ọ bụrụ na ọ gbaa

Tinye ọnya ahụ n'ime mmiri ọkụ, nke ọkụ dị ka onye ahụ nwere ike ịnagide n'ere ya ọkụ (jiri aka gị nwalee ya), ruo nkeji 30 ruo 90. Chọọ enyemaka ọgwụ, karịsịa maka azụ nkume (stonefish) na stingray.

Na-ebu ụzọ kpọọ nọmba mberede gị mgbe niile (112, 000, 911). Nke a bụ ndụmọdụ enyemaka mbụ n'ozuzu, ọ bụghị ndụmọdụ ọgwụ. Isi ihe enyemaka mbụ

Nọrọ na nchekwa

Emetụla anụ ọhịa aka, ejidela ya, emekwala ya ihe ọjọọ, ọbụna obere, ọbụna ma ọ dị ka ọ na-ehi ụra ma ọ bụ nwụọ anwụ.
Nye ya ohere. Ọ bụrụ na ị zutere otu, dị jụụ, laghachi azụ nwayọ, hapụ ya ka ọ gaa ụzọ ya.
Ọ bụrụ na otu gbaa gị: dị jụụ, emegharịla ahụ, kpọọ nọmba mberede gị (112, 000, 911) ma ọ bụ gaa ụlọ ọgwụ ngwa ngwa. Cheta ka o si dị, foto na-enye aka.

Ọ naghị achụ gị. Ọ na-eji nsị ya ejide nri ma ọ bụ chebe onwe ya, ọ ga-akakwa mma n'anya ya ịzo onwe ya. Ihe ndị ọzọ gbasara ịnọ na nchekwa

Ebee n'ụwa?

Afrịka Eshia Yurop Ugwu Amerika Ndịda Amerika Ọstrelia na Oshenia

Ọ hà aṅaa?

Kedu otú o si dị ogologo?

Kedu otú o si dị arọ?

dị arọ dị ka nkịta 30

dị ogologo dị ka nkịta 5 site n'imi ruo n'ọdụdị ogologo dị ka unere 28 a tọgbọrọ n'ahịrịnwere ike igwu mmiri ogologo nnukwu ọdọ igwu mmiri (50 m) n'ime sekọnd 6

Kedu otú Giant freshwater stingray si hà ma e jiri ya tụnyere GỊ?

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Kedu otú o si agba ọsọ?

Onye igwu mmiri Olympic ihe dị ka 8 km/h (5 mph)

Giant freshwater stingray ihe dị ka 30 km/h (19 mph)

Dọlfin na-agba ọsọ n'ike ya niile ihe dị ka 35 km/h (22 mph)

ọ dị mma ịmara

Eziokwu

In June 2022, a specimen caught in the Mekong River was reported as the largest strict freshwater fish ever documented, at about 300 kg.1

It is the widest freshwater fish in the world, growing up to 2.2 m across.1

Its tail spine is up to 38 cm long, the largest of any stingray species.1

Pups are nourished in the womb by a milk-like substance called histotroph, or 'uterine milk', made by the mother.1

In Cambodia, the average weight of a landed ray fell from 23.2 kg in 1980 to 6.9 kg in 2006.1

Maka ndị ọkachamara nsị

Aha sayensị: Urogymnus polylepis
Otu: Azụ na-agba nsị
Ezinụlọ: Dasyatidae2
Usoro: Myliobatiformes
Kọntinent dị iche iche: Eshia
Ụmụ ọhụrụ: It gives birth to live young. Females have litters of one to four pups, each about 30 cm across at birth.1
Otú ọ na-eme n'ọhịa: Endangered (IUCN overall); Critically Endangered in Thailand1
Ihe ize ndụ nye mmadụ: 3 / 5: Ọ dị njọ3

Ebe eziokwu ndị a si

Giant freshwater stingray (Wikipedia (CC BY-SA 4.0))
Urogymnus polylepis (iNaturalist): aha na nhazi ọkwa.
Venom Wiki: ọkwa ihe ize ndụ, nha nkịtị na nchepụta ọsọ bụ nke anyị. Lee otú anyị si achọpụta ha: Otú anyị si atụ ihe ize ndụ.

Eziokwu ọ bụla dị na peeji a nwere nọmba na-egosi ebe o si. Ọ bụrụ na anyị mehiere ihe, ndo, anyị bụ ndị hụrụ anụmanụ n'anya, ọ bụghị akwụkwọ akụkọ sayensị. Gwa anyị na [email protected], anyị ga-edozi ya.

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