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Eserese katuun nke Spiny dogfish
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Spiny dogfish

Squalus acanthias
Gbasara aha ya: The species name acanthias refers to the shark's two spines.1
Naanị na-afụ ụfụEmetụla ya akaỌ na-afụ ụfụ, mana ọ gaghị emerụ gị ahụ nke ukwuu.
Azụ na-agba nsị Mkpu na-agba nsịNri ya: Anụ
Ihe ize ndụ nye mmadụ: Na-afụ ụfụỌ nwere ike ịfụ ụfụ nke ukwuu, mana ọ naghị adịkarị njọ.

The spiny dogfish is a small, well-known shark with a sharp spine in front of each of its two back fins. It lives in shallow and offshore waters in most parts of the world, especially cooler seas, and it is hunted heavily for food. Its spines are its main form of defence.1

Ebe obibi
Shallow and offshore waters in most parts of the world, especially temperate seas; the northern Pacific population is now a separate species, the Pacific spiny dogfish1
Oké Osimiri Atlantik, Oké Osimiri Pasifik, Oké Osimiri India, Osimiri Mediterenian, Oké Osimiri Ndịda, Oké Osimiri Arktik, Antaktika, Osimiri Ugwu (North Sea)
Ụlọ
It lives in shallow waters and further offshore, and is described as bottom-dwelling. It is commonly found at depths of about 50 to 149 m, and has been found deeper than 700 m. Commercial fishing brings it to fish markets, fish and chip shops and restaurants.1
Ogologo
60 cm ruo 84 cm (2 ft ruo 2.8 ft)1
Ọsọ kacha elu
ihe dị ka 20 km/h (12 mph)
Igwu mmiri, nchepụta
Gịnị ka ọ na-eri?
It eats squid, fish, crab, jellyfish, sea cucumber, shrimp and other invertebrates. It hunts in packs that can number into the thousands and is described as an aggressive hunter.1
N'ezie!Foto Spiny dogfish
Spiny dogfish. Foto: Ecomare/Salko de Wolf. CC BY-SA 4.0, iNaturalist.

Otú ị ga-esi mata ya

  • Two spines, one in front of each dorsal (back) fin.1
  • No anal fin on the underside.1
  • White spots along its back.1
  • Greyish brown on both sexes, with countershading (darker on top, paler underneath).1
  • Asymmetrical tail lobes, forming a heterocercal tail (the upper lobe is larger).1

A na-agwakọkarị ya na: Several shark species share the names dogfish, spurdog and piked dogfish. Spiny dogfish are told apart by having two spines, one in front of each dorsal fin, and no anal fin.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.

Gịnị ka nsị ọ na-agba na-eme?

Its dorsal spines secrete a mild venom. The spines are driven into an attacker when the shark arches its back.1

Kedu otú o si dị egwu nye mmadụ?

Ihe ize ndụ nye mmadụ: Na-afụ ụfụỌ nwere ike ịfụ ụfụ nke ukwuu, mana ọ naghị adịkarị njọ.

Gịnị ka ọ na-eme mgbe ụjọ tụrụ ya?

If it is caught, it arches its back to pierce its captor with the spines near its dorsal fins.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 PasifikOké Osimiri AtlantikOké Osimiri IndiaOké Osimiri ArktikOké Osimiri NdịdaOsimiri MediterenianOsimiri Ugwu (North Sea)

Ọ hà aṅaa?

Kedu otú o si dị ogologo?

Spiny dogfish ogologo ya dị ihe dị ka 84 cm (2.8 ft)Nwamba ụlọ ihe dị ka 50 cm (1.6 ft)Nkịta ihe dị ka 1 m (3.3 ft)
dị ogologo dị ka nwamba ụlọ 1.5 site n'imi ruo n'ọdụdị ogologo dị ka unere 5 a tọgbọrọ n'ahịrịnwere ike igwu mmiri ogologo nnukwu ọdọ igwu mmiri (50 m) n'ime sekọnd 9

Kedu otú Spiny dogfish 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

Dogfish sharks have one of the longest pregnancies of any organism, lasting around 18 to 24 months.1

2

Spiny dogfish hunt in packs that can range up into the thousands.1

3

In England, dogfish are sold in fish and chip shops as 'huss', and used to be sold as 'rock salmon' until that term was outlawed.1

4

Spiny dogfish are popular dissection specimens in high schools and universities because they are easy to get and have small, cartilaginous skulls.1

5

Squalus acanthias fossils from the Miocene of Denmark and the Netherlands date from about 11 million years ago.1

6

Males are identified by a pair of modified pelvic fins called claspers, which they use to transfer sperm to the female.1

Onye na-ekpughe akụkọ ụgha

Akụkọ ụgha: All animals called dogfish or spurdog are the same species.

Eziokwu: These common names can apply to several species. Spiny dogfish are identified by their two spines, one in front of each dorsal fin, and by having no anal fin.1

Maka ndị ọkachamara nsị

Aha sayensị
Squalus acanthias
Otu
Azụ na-agba nsị
Ezinụlọ
Squalidae2
Usoro
Squaliformes
Kọntinent dị iche iche
Oké Osimiri Atlantik, Oké Osimiri Pasifik, Oké Osimiri India, Osimiri Mediterenian, Oké Osimiri Ndịda, Oké Osimiri Arktik, Antaktika, Osimiri Ugwu (North Sea), Oké osimiri niile
Ụmụ ọhụrụ
The eggs develop inside the mother and the pups are born alive, with about 5 to 6 in each litter; gestation can last from around 18 to 24 months, one of the longest of any organism.1
Otú ọ na-eme n'ọhịa
Vulnerable globally; Critically endangered in the Northeast Atlantic1
Ihe ize ndụ nye mmadụ
2 / 5: Na-afụ ụfụ3

Ebe eziokwu ndị a si

  1. Spiny dogfish (Wikipedia (CC BY-SA 4.0))
  2. Squalus acanthias (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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