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Spiny dogfish

Squalus acanthias

Kuhusu jina: The species name acanthias refers to the shark's two spines.1

Inauma tuUsiguseInauma, lakini haitakudhuru vibaya.

Samaki wenye sumu

Miiba yenye sumuHula: Nyama

Hatari kwa watu: InaumaInaweza kuuma sana, lakini karibu kamwe si jambo zito.

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

Anaishi

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

Bahari ya Atlantiki, Bahari ya Pasifiki, Bahari ya Hindi, Bahari ya Mediterania, Bahari ya Kusini, Bahari ya Aktiki, Antaktika, Bahari ya Kaskazini

Nyumbani

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

Urefu

60 cm hadi 84 cm (2 ft hadi 2.8 ft)1

Kasi ya juu

takriban km 20 kwa saa (maili 12 kwa saa)

Kuogelea, makadirio

Hula nini?

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

Picha ya Spiny dogfish — Spiny dogfish. Picha: Ecomare/Salko de Wolf. CC BY-SA 4.0, iNaturalist.

Jinsi ya kumtambua

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

Mara nyingi huchanganywa 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

Nguvu ya sumu

Miiba yenye sumu

Miiba mikali hubeba sumu. Kumkanyaga au kumshika kunauma.

Sumu yake hufanya nini?

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

Ana hatari gani kwa watu?

Hatari kwa watu: InaumaInaweza kuuma sana, lakini karibu kamwe si jambo zito.

Hufanya nini akiogopa?

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

Miiba yake ikikuchoma

Weka jeraha kwenye maji ya moto, moto kiasi ambacho mtu anaweza kuvumilia bila kuungua (pima kwanza kwa mkono wako), kwa dakika 30 hadi 90. Tafuta msaada wa kitabibu, hasa kwa samaki-jiwe na taa.

Daima piga namba ya dharura kwanza (112, 000, 911). Huu ni mwongozo wa jumla wa huduma ya kwanza, si ushauri wa kitabibu. Misingi ya huduma ya kwanza

Kaa salama

Kamwe usimguse, kumkamata wala kumchokoza mnyama wa porini, hata akiwa mdogo, na hata akionekana amelala au amekufa.
Mpe nafasi. Ukikutana naye, tulia, rudi nyuma polepole na umwache aende zake.
Miiba yake ikikuchoma: tulia, usitikisike, piga namba yako ya dharura (112, 000, 911) au nenda hospitali haraka. Kumbuka alivyoonekana, picha husaidia.

Hakuwindi wewe. Hutumia sumu yake kukamata chakula au kujilinda, na hupendelea zaidi kujificha. Zaidi kuhusu kukaa salama

Wapi duniani?

Afrika Asia Ulaya Amerika Kaskazini Amerika Kusini Australia na Oceania Antaktika Bahari ya Pasifiki Bahari ya Atlantiki Bahari ya Hindi Bahari ya Aktiki Bahari ya Kusini Bahari ya Mediterania Bahari ya Kaskazini

Ana ukubwa gani?

Ana urefu gani?

urefu sawa na paka wa nyumbani 1.5 kutoka pua hadi mkiaurefu sawa na ndizi 5 zilizopangwa mstariangeweza kuogelea urefu wa bwawa kubwa (m 50) kwa sekunde 9

Spiny dogfish ana ukubwa gani ukilinganisha na WEWE?

Ni hesabu tu kwenye kivinjari chako. Hakuna kinachohifadhiwa wala kutumwa popote.

Ana kasi gani?

Mwogeleaji wa Olimpiki takriban km 8 kwa saa (5 mph)

Spiny dogfish takriban km 20 kwa saa (12 mph)

Pomboo kwa kasi kamili takriban km 35 kwa saa (22 mph)

inafaa kujua

Ukweli

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

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

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

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

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

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

Kuvunja dhana potofu

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

Ukweli: 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

Kwa wataalamu wa sumu

Jina la kisayansi: Squalus acanthias
Kundi: Samaki wenye sumu
Familia: Squalidae2
Mpangilio: Squaliformes
Mabara: Bahari ya Atlantiki, Bahari ya Pasifiki, Bahari ya Hindi, Bahari ya Mediterania, Bahari ya Kusini, Bahari ya Aktiki, Antaktika, Bahari ya Kaskazini, Bahari kuu
Watoto: 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
Hali yake porini: Vulnerable globally; Critically endangered in the Northeast Atlantic1
Hatari kwa watu: 2 / 5: Inauma3

Ukweli unatoka wapi

Spiny dogfish (Wikipedia (CC BY-SA 4.0))
Squalus acanthias (iNaturalist): majina na uainishaji.
Venom Wiki: kiwango cha hatari, ukubwa wa kawaida na makadirio ya kasi ni yetu wenyewe. Ona jinsi tunavyovipata: Jinsi tunavyopima hatari.

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