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Port Jackson shark

Heterodontus portusjacksoni

Oor die naam: The genus name Heterodontus comes from Greek words meaning 'different' and 'tooth', which refers to its teeth.1

OnskadelikOnskadelik vir mense. Niks om oor bekommerd te wees nie.

Giftige visse

Giftige stekelsEet: Vleis

Gevaar vir mense: LigSoos 'n bysteek of minder. Basies onskadelik vir mense.

The Port Jackson shark is a bottom-dwelling shark that lives in the cool coastal waters of southern Australia. It is active mostly at night, when it hunts shellfish, sea urchins and fish. It is harmless to people, though its spines have a reputation that is not confirmed.1

Leef in

Temperate coastal waters of southern Australia, from southern Queensland to Tasmania and west to central Western Australia.1

Indiese Oseaan, Suidelike Oseaan, Antarktika

Tuis

It lives on or near the sea bottom, mostly over rocky ground, though it also uses sandy, muddy and seagrass areas. By day it rests in flat areas that offer shelter from currents, including caves and under rocky outcrops. It usually lives at depths of less than 100 metres.1

Lengte

1,6 m (5,4 ft)1

Topspoed

omtrent 22 km/h (14 mph)

Swem, rowwe skatting

Wat eet dit?

It eats hard-shelled molluscs, crustaceans, sea urchins and fish. It forages at night, when its prey is most active, and can suck in water and sand from the bottom to catch food. Black sea urchins are often eaten.1

Foto van Port Jackson shark — Port Jackson shark. Foto: Mark Norman / Museum Victoria. CC BY 3.0, Wikimedia Commons.

Hoe om dit te herken

Grey-brown body with dark brown, harness-like bands, including one that runs across the eyes.1
Large, blunt, flat head with raised ridges above the eyes.1
A spine at the front edge of each of its two dorsal fins, which are nearly equal in size.1
Front teeth are small and pointed, while back teeth are flat and blunt.1
Adults can grow up to 1.65 metres long.1

Gifkrag

Giftige stekels

Skerp stekels dra die gif. Dit maak seer as jy daarop trap of dit gryp.

Hoe gevaarlik is dit vir mense?

Gevaar vir mense: LigSoos 'n bysteek of minder. Basies onskadelik vir mense.

The shark poses no danger to humans. In October 2011, a man was bitten at Elwood Beach near Melbourne, but the bite did not pierce the skin and he was able to swim away while the shark was still attached to his calf.1

As sy stekels jou steek

Sit die wond in warm water, so warm as wat die persoon kan verdra sonder om te brand (toets dit met jou eie hand), vir 30 tot 90 minute. Kry mediese hulp, veral vir klipvisse en pylsterte.

Bel altyd eers jou noodnommer (112, 000, 911). Dit is algemene noodhulpraad, nie mediese advies nie. Noodhulp-basiese beginsels

Bly veilig

Moet nooit aan 'n wilde dier raak, dit vang of terg nie, selfs nie 'n kleintjie nie, en selfs nie as dit lyk of dit slaap of dood is nie.
Gee dit spasie. As jy een raakloop, bly kalm, stap stadig terug en laat dit sy eie pad gaan.
As sy stekels jou steek: bly kalm, bly stil, bel jou noodnommer (112, 000, 911) of kom vinnig by 'n hospitaal uit. Onthou hoe dit gelyk het, 'n foto help.

Dit is nie uit om jou te kry nie. Dit gebruik sy gif om kos te vang of om homself te beskerm, en kruip baie eerder weg. Meer oor veilig bly

Waar in die wêreld?

Afrika Asië Europa Noord-Amerika Suid-Amerika Australië & Oseanië Antarktika Indiese Oseaan Suidelike Oseaan

Hoe groot is dit?

Hoe lank is dit?

so lank soos 3 huiskatte neus tot stertso lank soos 9 piesangs punt aan puntkan die lengte van 'n groot swembad (50 m) in 8,2 sekondes swem

Hoe groot is Port Jackson shark in vergelyking met JOU?

Net wiskunde in jou blaaier. Niks word gestoor of enige plek heen gestuur nie.

Hoe vinnig is dit?

'n Olimpiese swemmer omtrent 8 km/h (5 mph)

Port Jackson shark omtrent 22 km/h (14 mph)

'n Dolfyn op volspoed omtrent 35 km/h (22 mph)

die moeite werd om te weet

Feite

It can turn its stomach inside out and spit out unwanted contents.1

It can breathe while lying still on the bottom. It pumps water in through its first gill slit and out through the others, so it does not need to swim with its mouth open.1

Juveniles have individual personalities. Some are bolder than others when exploring new places, and they respond differently to stress.1

Juveniles can learn to link bubbles, lights or sounds with food, and they can learn by watching other sharks.1

Adults are often seen resting together in caves, but juveniles do not seem to be social.1

Each year it migrates south in summer and returns north to breed in winter.1

Mite-breker

Mite: Port Jackson sharks are dangerous to people.

Waarheid: The shark poses no danger to humans. Its spines are rumoured to be venomous, but this has not been confirmed.1

Vir gifkenners

Wetenskaplike naam: Heterodontus portusjacksoni
Groep: Giftige visse
Familie: Heterodontidae2
Orde: Heterodontiformes
Kontinente: Indiese Oseaan, Suidelike Oseaan, Antarktika, Die oseane
Babas: It lays eggs rather than giving birth to live young. From late August to mid-November, the female lays pairs of eggs every 8 to 17 days, up to eight pairs in total, and the eggs take 10 to 11 months to hatch.1
Hoe dit in die natuur gaan: Least Concern (IUCN Red List)1
Gevaar vir mense: 1 / 5: Lig3

Waar die feite vandaan kom

Port Jackson shark (Wikipedia (CC BY-SA 4.0))
Heterodontus portusjacksoni (iNaturalist): name en klassifikasie.
Venom Wiki: die gevaarvlak, die tipiese grootte en die spoedskatting is ons eie. Kyk hoe ons dit uitwerk: Hoe ons gevaar gradeer.

Elke feit op hierdie bladsy het 'n nommer wat na sy bron wys. As ons iets verkeerd het, jammer, ons is dierfanatici, nie 'n wetenskaplike joernaal nie. Laat weet ons by [email protected] en ons maak dit reg.

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