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Spiny dogfish

Squalus acanthias
Davart il num: The species name acanthias refers to the shark's two spines.1
Fa mo malBetg tutgarQuai fa mal, ma i na ta fa nagin donn serius.
Peschs tissientads Spinas tissientadasMangia: Charn
Privel per umans: DolurusQuai po far propi mal, ma i n'è bunamain mai grav.

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

Viva en
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
Ocean Atlantic, Ocean Pacific, Ocean Indic, Mar Mediterran, Ocean dal Sid, Ocean Arctic, Antarctica, Mar dal Nord
Pagina iniziala
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
Lunghezza
60 cm fin 84 cm (2 ft fin 2,8 ft)1
Sveltezza maximala
circa 20 km/h (12 mph)
Nudar, stima approximativa
Tge mangia el?
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
Propi!Foto da Spiny dogfish
Spiny dogfish. Foto: Ecomare/Salko de Wolf. CC BY-SA 4.0, iNaturalist.

Co renconuscher el

  • 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

Savens confundì cun: 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

Forza dal tissi

Spinas tissientadas

Spinas pizzadas portan il tissi. Sch'ins passa sin el u al piglia, fa quai mal.

Tge fa ses tissi?

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

Quant privlus è el per umans?

Privel per umans: DolurusQuai po far propi mal, ma i n'è bunamain mai grav.

Tge fa el, cura ch'el ha tema?

If it is caught, it arches its back to pierce its captor with the spines near its dorsal fins.1

Sche sias spinas ta furan

  • Metta la plaja en aua chauda, uschè chauda sco che la persuna po supportar senza sa brischar (emprova cun tes agen maun), durant 30 fin 90 minutas. Tschertga agid medicinal, surtut tar peschs crap e rajas.

Clama adina l'emprim tes numer d'urgenza (112, 000, 911). Quai è in cussegl general d'emprim agid, betg in cussegl medicinal. Basa da l'emprim agid

Resta en segirezza

  • Na tutga, na piglia e na tizza mai in animal selvadi, gnanc in pitschen, ed era sch'el para da durmir u d'esser mort.
  • Dà spazi a l'animal. Sche ti scuntras in, resta calm, va plaun enavos e lascha ir el per sia via.
  • Sche sias spinas ta furan: resta calm, na ta mova betg, clama tes numer d'urgenza (112, 000, 911) u va spert en in ospital. Ta regorda co ch'el veseva or, ina foto gida.

El n'ha betg quai sin tai. El dovra ses tissi per pigliar nutriment u per sa defender, e sa zuppa bler pli gugent. Dapli davart la segirezza

Nua sin il mund?

AfricaAsiaEuropaAmerica dal NordAmerica dal SidAustralia ed OceaniaAntarcticaOcean PacificOcean AtlanticOcean IndicOcean ArcticOcean dal SidMar MediterranMar dal Nord

Quant grond è el?

Quant lung è el?

Spiny dogfish circa 84 cm lung (2,8 ft)In giat da chasa circa 50 cm (1,6 ft)In chaun circa 1 m (3,3 ft)
uschè lung sco 1,5 giats da chasa dal nas fin a la cuauschè lung sco 5 bananas ina suenter l'autrapudess nudar la lunghezza d'in grond bassin (50 m) en 9 secundas

Quant grond è Spiny dogfish cumpareglià cun TAI?

Mo matematica en tes navigatur. Nagut na vegn memorisà u tramess.

Quant svelt è el?

bun da savair

Fatgs

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

Destructur da mits

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

Vardad: 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

Per experts da tissi

Num scientific
Squalus acanthias
Gruppa
Peschs tissientads
Famiglia
Squalidae2
Urden
Squaliformes
Continents
Ocean Atlantic, Ocean Pacific, Ocean Indic, Mar Mediterran, Ocean dal Sid, Ocean Arctic, Antarctica, Mar dal Nord, Ils oceans
Poppins
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
Co ch'i va ad el en la natira
Vulnerable globally; Critically endangered in the Northeast Atlantic1
Privel per umans
2 / 5: Dolurus3

Da nua che vegnan ils fatgs

  1. Spiny dogfish (Wikipedia (CC BY-SA 4.0))
  2. Squalus acanthias (iNaturalist): nums e classificaziun.
  3. Venom Wiki: il stgalim da privel, la grondezza tipica e la stima da la sveltezza èn noss agens. Guarda co che nus als calculain: Co che nus valitain il privel.

Mintga fatg sin questa pagina ha in numer che renvia a sia funtauna. Sche nus avain fatg in sbagl, perstgisa, nus essan fans d'animals, betg ina revista scientifica. Scriva a nus a [email protected] e nus curregin.

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