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Giant freshwater stingray

Urogymnus polylepis

Kuhusu jina: The scientific name polylepis comes from the Greek words for 'many' and 'scales'.1

Anahitaji daktariMara chache huua, lakini kudungwa kunahitaji daktari.

Samaki wenye sumu

KudungwaHula: Nyama

Hatari kwa watu: MbayaKudungwa kunahitaji daktari. Vifo ni nadra sana.

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

Anaishi

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

Asia

Nyumbani

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

Urefu

5 m (16 ft)1

Uzito

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

Kasi ya juu

takriban km 30 kwa saa (maili 19 kwa saa)

Kuogelea, makadirio

Hula nini?

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

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

Jinsi ya kumtambua

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

Mara nyingi huchanganywa 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

Nguvu ya sumu

Kudungwa

Sumu hutoka kupitia mdungo.

Sumu yake hufanya nini?

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

Ana hatari gani kwa watu?

Hatari kwa watu: MbayaKudungwa kunahitaji daktari. Vifo ni nadra sana.

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

Akidunga

Weka jeraha kwenye maji ya moto, moto kiasi ambacho mtu anaweza kuvumilia bila kuungua (pima kwanza kwa mkono wako), kwa dakika 30 hadi 90. Tafuta msaada wa kitabibu, hasa kwa samaki-jiwe na taa.

Daima piga namba ya dharura kwanza (112, 000, 911). Huu ni mwongozo wa jumla wa huduma ya kwanza, si ushauri wa kitabibu. Misingi ya huduma ya kwanza

Kaa salama

Kamwe usimguse, kumkamata wala kumchokoza mnyama wa porini, hata akiwa mdogo, na hata akionekana amelala au amekufa.
Mpe nafasi. Ukikutana naye, tulia, rudi nyuma polepole na umwache aende zake.
Akikudunga: tulia, usitikisike, piga namba yako ya dharura (112, 000, 911) au nenda hospitali haraka. Kumbuka alivyoonekana, picha husaidia.

Hakuwindi wewe. Hutumia sumu yake kukamata chakula au kujilinda, na hupendelea zaidi kujificha. Zaidi kuhusu kukaa salama

Wapi duniani?

Afrika Asia Ulaya Amerika Kaskazini Amerika Kusini Australia na Oceania

Ana ukubwa gani?

Ana urefu gani?

Ana uzito gani?

uzito sawa na mbwa 30

urefu sawa na mbwa 5 kutoka pua hadi mkiaurefu sawa na ndizi 28 zilizopangwa mstariangeweza kuogelea urefu wa bwawa kubwa (m 50) kwa sekunde 6

Giant freshwater stingray ana ukubwa gani ukilinganisha na WEWE?

Ni hesabu tu kwenye kivinjari chako. Hakuna kinachohifadhiwa wala kutumwa popote.

Ana kasi gani?

Mwogeleaji wa Olimpiki takriban km 8 kwa saa (5 mph)

Giant freshwater stingray takriban km 30 kwa saa (19 mph)

Pomboo kwa kasi kamili takriban km 35 kwa saa (22 mph)

inafaa kujua

Ukweli

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

Kwa wataalamu wa sumu

Jina la kisayansi: Urogymnus polylepis
Kundi: Samaki wenye sumu
Familia: Dasyatidae2
Mpangilio: Myliobatiformes
Mabara: Asia
Watoto: It gives birth to live young. Females have litters of one to four pups, each about 30 cm across at birth.1
Hali yake porini: Endangered (IUCN overall); Critically Endangered in Thailand1
Hatari kwa watu: 3 / 5: Mbaya3

Ukweli unatoka wapi

Giant freshwater stingray (Wikipedia (CC BY-SA 4.0))
Urogymnus polylepis (iNaturalist): majina na uainishaji.
Venom Wiki: kiwango cha hatari, ukubwa wa kawaida na makadirio ya kasi ni yetu wenyewe. Ona jinsi tunavyovipata: Jinsi tunavyopima hatari.

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