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Dibuix de Short-tail stingray
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Short-tail stingray

Bathytoshia brevicaudata
Sobre el nom: The scientific name Bathytoshia brevicaudata comes from the Latin words brevis (short) and cauda (tail), which refer to its short tail.1
Pot matarEt pot matar sense tractament. Si et pica, busca ajuda de pressa.
Peixos verinosos PicadesMenja: Carn
Perill per a les persones: Molt perillósPot matar una persona que no rep tractament.

The short-tail stingray is one of the largest stingrays in the world. It lives in temperate seas off southern Africa, southern Australia and New Zealand, mostly on or near the sea floor. It is not aggressive, but its long venomous sting can cause a serious wound if the ray is startled.1

Viu a
Temperate waters of the Southern Hemisphere: southern Africa, southern Australia, including Tasmania, and New Zealand1
Oceà Índic, Oceà Pacífic, Mar del Corall
Inici
It lives on the bottom in estuaries, sheltered bays, sandy flats, rocky reefs and the outer continental shelf, and sometimes swims up into open water. Off southern Africa it is usually found offshore, at depths of 180 to 480 m. Off Australia and New Zealand it can be found from the intertidal zone down to 156 m. At Hamelin Bay in Western Australia, many rays gather where visitors hand-feed them fish scraps.1
Llargada
4,3 m (14 ft)1
Pes
350 kg (772 lb)1
Velocitat màxima
uns 30 km/h (19 mph)
Nedant, estimació aproximada
Què menja?
It eats bony fishes and invertebrates such as molluscs and crustaceans, including burrowing species. It finds buried bivalves and spoon worms by detecting the tiny water jets they produce, then sucks them out of the sediment. It also eats open-water animals such as salps and hyperiid amphipods.1
De debò!Foto de Short-tail stingray
Short-tail stingray. Foto: Alpha from Melbourne, Australia. CC BY-SA 2.0, Wikimedia Commons.

Com reconèixer-lo

  • Diamond-shaped, heavy disc that is smooth, with no scales (dermal denticles) on the disc even in adults1
  • Plain grey-brown back, darkening towards the tail and above the eyes, with a line of white pores on either side of the head1
  • Whitish underside, darkening towards the edges of the fins1
  • Tail usually shorter than the disc, thick at the base, with one or two serrated stinging spines about halfway along it1
  • Adults have a row of large, spear-like thorns in front of the sting1

Sovint es confon amb: The pitted stingray (Dasyatis matsubarai) of the northwestern Pacific looks similar but is smaller. Records of this species from northern Australia and Thailand are thought to be other rays that were misidentified.1

Poder del verí

Picades

El verí surt per un fibló.

Què fa el seu verí?

Its sting is venomous. The mucous sheath covering the sting contains a toxin that causes necrosis, which means the death of body tissue. The most dangerous injuries involve damage to a vital organ, heavy blood loss, or secondary infection (sepsis) or tetanus.1

Com de perillós és per a les persones?

Perill per a les persones: Molt perillósPot matar una persona que no rep tractament.

The short-tail stingray is not aggressive, but if startled or harassed it can inflict a serious and even fatal wound. Its sting can be over 30 cm long and can penetrate most footwear, including kevlar bootees. It is responsible for most stingray injuries off New Zealand, including the death of Australian naturalist Steve Irwin, who was pierced in the chest by its barbed tail.1

Què fa quan té por?

When threatened, it raises its tail over its back like a scorpion, and a startled ray can leap through the water and strike with its tail.1

Si pica

  • Posa la ferida en aigua calenta, tan calenta com la persona pugui aguantar sense cremar-se (prova-la amb la teva mà), de 30 a 90 minuts. Busca ajuda mèdica, sobretot amb peixos pedra i rajades.

Truca sempre primer al número d'emergències (112, 000, 911). Això són pautes generals de primers auxilis, no consells mèdics. Primers auxilis bàsics

Estigues segur

  • No toquis, atrapis ni molestis mai un animal salvatge, encara que sigui petit i encara que sembli adormit o mort.
  • Deixa-li espai. Si en trobes un, mantén la calma, recula a poc a poc i deixa que segueixi el seu camí.
  • Si te'n pica un: mantén la calma, no et moguis, truca al número d'emergències (112, 000, 911) o ves de pressa a un hospital. Recorda com era, una foto ajuda.

No va a per tu. Fa servir el verí per caçar o per defensar-se, i prefereix mil vegades amagar-se. Més sobre com estar segur

On del món?

ÀfricaÀsiaEuropaAmèrica del NordAmèrica del SudAustràlia i OceaniaOceà PacíficOceà ÍndicMar del Corall

Que gran és?

Quant fa de llarg?

Short-tail stingray uns 4,3 m de llarg (14 ft)La bici d'un adult uns 1,8 m (5,9 ft)Un cotxe uns 4,5 m (15 ft)

Quant pesa?

pesa com 18 gossos
fa de llarg com 4 gossos del nas a la cuafa de llarg com 24 plàtans en filapodria nedar la llargada d'una piscina gran (50 m) en 6 segons

Que gran és Short-tail stingray comparat amb TU?

Només càlculs al teu navegador. No es desa ni s'envia res enlloc.

Com de ràpid va?

val la pena saber-ho

Dades

1

It can flap its pectoral fins with enough force to make a loud audible 'bang' in the water, although it is usually slow-moving.1

2

It is one of the largest stingrays in the world, and reliable observers off New Zealand have reported individuals almost 3 m across.1

3

Captive experiments suggest it can detect magnetic fields, which may help it navigate.1

4

Every summer, large groups gather under the rocky archways of the Poor Knights Islands off New Zealand, where both mating and birthing have been seen.1

5

Captive females have been observed mating with up to three different males in succession.1

Per a experts en verins

Nom científic
Bathytoshia brevicaudata
Grup
Peixos verinosos
Família
Dasyatidae2
Ordre
Myliobatiformes
Continents
Oceà Índic, Oceà Pacífic, Mar del Corall, Els oceans
Cries
It gives birth to live young. Females usually have litters of 6 to 10 pups in summer, and newborns measure 32 to 36 cm across.1
Com li va a la natura
Least Concern (IUCN)1
Perill per a les persones
4 / 5: Molt perillós3

D'on surten les dades

  1. Short-tail stingray (Wikipedia (CC BY-SA 4.0))
  2. Bathytoshia brevicaudata (iNaturalist): noms i classificació.
  3. Venom Wiki: el nivell de perill, la mida típica i la velocitat estimada són nostres. Mira com els calculem: Com valorem el perill.

Cada dada d'aquesta pàgina té un número que porta a la seva font. Si ens hem equivocat en alguna cosa, perdona, som fans dels animals, no una revista científica. Escriu-nos a [email protected] i ho arreglarem.

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