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Eserese katuun nke Port Jackson shark
Nọmba 1260 n'ime 1 402

Port Jackson shark

Heterodontus portusjacksoni
Gbasara aha ya: The genus name Heterodontus comes from Greek words meaning 'different' and 'tooth', which refers to its teeth.1
Adịghị njọỌ dịghị njọ nye mmadụ. Ọ dịghị ihe ị ga-echegbu onwe gị.
Azụ na-agba nsị Mkpu na-agba nsịNri ya: Anụ
Ihe ize ndụ nye mmadụ: ObereDị ka ịgba aṅụ ma ọ bụ nke na-erughị ya. Ọ fọrọ nke nta ka ọ ghara ịdị njọ nye mmadụ.

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

Ebe obibi
Temperate coastal waters of southern Australia, from southern Queensland to Tasmania and west to central Western Australia.1
Oké Osimiri India, Oké Osimiri Ndịda, Antaktika
Ụlọ
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
Ogologo
1.6 m (5.4 ft)1
Ọsọ kacha elu
ihe dị ka 22 km/h (14 mph)
Igwu mmiri, nchepụta
Gịnị ka ọ na-eri?
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
N'ezie!Foto Port Jackson shark
Port Jackson shark. Foto: Mark Norman / Museum Victoria. CC BY 3.0, Wikimedia Commons.

Otú ị ga-esi mata ya

  • 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

Ike nsị

Mkpu na-agba nsị

Mkpu dị nkọ na-ebu nsị ahụ. Ịzọ ya ụkwụ ma ọ bụ ijide ya na-afụ ụfụ.

Kedu otú o si dị egwu nye mmadụ?

Ihe ize ndụ nye mmadụ: ObereDị ka ịgba aṅụ ma ọ bụ nke na-erughị ya. Ọ fọrọ nke nta ka ọ ghara ịdị njọ nye mmadụ.

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

Ọ bụrụ na mkpu ya dụrụ gị

  • 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 mkpu ya dụrụ 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?

AfrịkaEshiaYuropUgwu AmerikaNdịda AmerikaỌstrelia na OsheniaAntaktikaOké Osimiri IndiaOké Osimiri Ndịda

Ọ hà aṅaa?

Kedu otú o si dị ogologo?

Port Jackson shark ogologo ya dị ihe dị ka 1.6 m (5.4 ft)Nkịta ihe dị ka 1 m (3.3 ft)Okenye ihe dị ka 1.7 m (5.6 ft)
dị ogologo dị ka nwamba ụlọ 3 site n'imi ruo n'ọdụdị ogologo dị ka unere 9 a tọgbọrọ n'ahịrịnwere ike igwu mmiri ogologo nnukwu ọdọ igwu mmiri (50 m) n'ime sekọnd 8.2

Kedu otú Port Jackson shark si hà ma e jiri ya tụnyere GỊ?

Naanị mgbakọ na mwepụ n'ime browser gị. Ọ dịghị ihe echekwara ma ọ bụ ezigara ebe ọ bụla.

Kedu otú o si agba ọsọ?

ọ dị mma ịmara

Eziokwu

1

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

2

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

3

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

4

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

5

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

6

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

Onye na-ekpughe akụkọ ụgha

Akụkọ ụgha: Port Jackson sharks are dangerous to people.

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

Maka ndị ọkachamara nsị

Aha sayensị
Heterodontus portusjacksoni
Otu
Azụ na-agba nsị
Ezinụlọ
Heterodontidae2
Usoro
Heterodontiformes
Kọntinent dị iche iche
Oké Osimiri India, Oké Osimiri Ndịda, Antaktika, Oké osimiri niile
Ụmụ ọhụrụ
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
Otú ọ na-eme n'ọhịa
Least Concern (IUCN Red List)1
Ihe ize ndụ nye mmadụ
1 / 5: Obere3

Ebe eziokwu ndị a si

  1. Port Jackson shark (Wikipedia (CC BY-SA 4.0))
  2. Heterodontus portusjacksoni (iNaturalist): aha na nhazi ọkwa.
  3. 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.

Akpị agụụ na-agụ! Venom Wiki bụ ọrụ otu onye: n'efu, na-enweghị mgbasa ozi na ndị na-esochi gị. Obere onyinye na-enyere aka idebe ya n'ịntanetị.Nye akpị nri

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