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Igishushanyo cya Spiny dogfish
No. 1259 kuri 1 402

Spiny dogfish

Squalus acanthias
Ibyerekeye izina: The species name acanthias refers to the shark's two spines.1
Irababaza gusaNtukayikorehoIrababaza, ariko ntizakugirira nabi bikomeye.
Amafi afite ubumara Amahwa afite ubumaraIrya: Inyama
Akaga ku bantu: IrababazaIshobora kubabaza cyane, ariko hafi ya buri gihe nta kibazo gikomeye biteza.

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

Iba muri
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
Inyanja ya Atalantika, Inyanja ya Pasifika, Inyanja y'Abahinde, Inyanja ya Mediterane, Inyanja y'Amajyepfo, Inyanja ya Arigitika, Antaragitika, Inyanja y'Amajyaruguru
Ahabanza
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
Uburebure
60 cm kugeza kuri 84 cm (2 ft kugeza kuri 2,8 ft)1
Umuvuduko wo hejuru
hafi 20 km/h (12 mph)
Koga, ikigereranyo cy'ugereranyije
Irya iki?
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
Koko!Ifoto ya Spiny dogfish
Spiny dogfish. Ifoto: Ecomare/Salko de Wolf. CC BY-SA 4.0, iNaturalist.

Uko wayimenya

  • 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

Ikunze kwitiranywa 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

Imbaraga z'ubumara

Amahwa afite ubumara

Amahwa atyaye ni yo atwara ubumara. Kuyikandagira cyangwa kuyifata birababaza.

Ubumara bwayo bukora iki?

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

Iteje akaga kangana iki ku bantu?

Akaga ku bantu: IrababazaIshobora kubabaza cyane, ariko hafi ya buri gihe nta kibazo gikomeye biteza.

Ikora iki iyo ifite ubwoba?

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

Niba amahwa yayo akujombye

  • Shyira igikomere mu mazi ashyushye, ashyushye uko umuntu abyihanganira atiriwe ashya (bigerageze ukoresheje ukuboko kwawe), mu gihe cy'iminota 30 kugeza kuri 90. Shaka ubufasha bwa muganga, cyane cyane ku bya stonefish na stingray.

Buri gihe banza uhamagare nimero y'ubutabazi (112, 000, 911). Izi ni inama rusange z'ubutabazi bw'ibanze, si inama za muganga. Ibanze by'ubutabazi bw'ibanze

Irinde akaga

  • Ntuzigere ukora, ufata cyangwa ushotora inyamaswa yo mu gasozi, nubwo yaba ntoya, kandi nubwo yasa n'isinziriye cyangwa yapfuye.
  • Yihe umwanya. Niba uhuye n'imwe, tuza, usubire inyuma buhoro buhoro kandi uyireke yigendere.
  • Niba amahwa yayo akujombye: tuza, ntunyeganyege, hamagara nimero y'ubutabazi (112, 000, 911) cyangwa ujye ku bitaro vuba. Ibuka uko yasaga, ifoto irafasha.

Ntigushakisha ngo ikugirire nabi. Ikoresha ubumara bwayo kugira ngo ifate ibyo kurya cyangwa yirinde, kandi ikunda cyane kwihisha. Ibindi ku kwirinda

Ni hehe ku isi?

AfurikaAziyaUburayiAmerika y'AmajyaruguruAmerika y'AmajyepfoOsitaraliya na OseyaniyaAntaragitikaInyanja ya PasifikaInyanja ya AtalantikaInyanja y'AbahindeInyanja ya ArigitikaInyanja y'AmajyepfoInyanja ya MediteraneInyanja y'Amajyaruguru

Ingana gute?

Ireshya ite?

Spiny dogfish ireshya hafi 84 cm (2,8 ft)Injangwe yo mu rugo hafi 50 cm (1,6 ft)Imbwa hafi 1 m (3,3 ft)
ireshya n'injangwe zo mu rugo 1,5 zikurikiranye kuva ku zuru kugeza ku murizoireshya n'imineke 5 ikurikiranyeyakoga uburebure bw'ikidendezi kinini (metero 50) mu masegonda 9

Spiny dogfish ingana ite ugereranyije NAWE?

Ni imibare gusa ikorerwa muri mudasobwa yawe. Nta kintu kibikwa cyangwa cyoherezwa ahandi.

Yihuta gute?

bikwiye kumenywa

Ibintu by'ukuri

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

Usenya ibinyoma

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

Ukuri: 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

Ku bahanga mu by'ubumara

Izina rya siyansi
Squalus acanthias
Itsinda
Amafi afite ubumara
Umuryango
Squalidae2
Itsinda rinini (order)
Squaliformes
Imigabane
Inyanja ya Atalantika, Inyanja ya Pasifika, Inyanja y'Abahinde, Inyanja ya Mediterane, Inyanja y'Amajyepfo, Inyanja ya Arigitika, Antaragitika, Inyanja y'Amajyaruguru, Inyanja ngari
Abana bato
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
Uko imeze mu gasozi
Vulnerable globally; Critically endangered in the Northeast Atlantic1
Akaga ku bantu
2 / 5: Irababaza3

Aho ibintu bivugwa bituruka

  1. Spiny dogfish (Wikipedia (CC BY-SA 4.0))
  2. Squalus acanthias (iNaturalist): amazina n'ibyiciro.
  3. Venom Wiki: urwego rw'akaga, ingano isanzwe n'ikigereranyo cy'umuvuduko ni ibyacu bwite. Reba uko tubibara: Uko tugena akaga.

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