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Ikhathuni ka-Spiny dogfish
Inombolo 1259 kwezi-1 402

Spiny dogfish

Squalus acanthias
Malunga negama: The species name acanthias refers to the shark's two spines.1
Kubuhlungu njeMusa ukuchukumisaKubuhlungu, kodwa akusayi kukwenzakalisa kakhulu.
Iintlanzi ezinetyhefu Amava anetyhefuSitya: Inyama
Ingozi ebantwini: KubuhlunguKunokuba buhlungu ngokwenene, kodwa phantse akusoze kube kubi kakhulu.

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

Sihlala
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
uLwandlekazi lweAtlantiki, uLwandlekazi lwePasifiki, uLwandlekazi lwaseIndiya, uLwandle lweMeditera, uLwandlekazi oluseMazantsi, uLwandlekazi lweArctic, IAntarctica, uLwandle lwaseMntla (North Sea)
Ekhaya
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
Ubude
60 cm ukuya ku-84 cm (2 ft ukuya ku-2,8 ft)1
Esona santya siphezulu
malunga ne-20 km/h (12 mph)
Ukuqubha, uqikelelo nje
Sitya ntoni?
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
Ngokwenene!Ifoto ka-Spiny dogfish
Spiny dogfish. Ifoto: Ecomare/Salko de Wolf. CC BY-SA 4.0, iNaturalist.

Indlela yokusiqaphela

  • 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

Sidla ngokubhidaniswa no: 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

Amandla etyhefu yokuluma nokuhlaba

Amava anetyhefu

Amava abukhali aphethe ityhefu. Ukusinyathela okanye ukusibamba kubuhlungu.

Ityhefu yaso yokuluma okanye yokuhlaba yenza ntoni?

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

Siyingozi kangakanani ebantwini?

Ingozi ebantwini: KubuhlunguKunokuba buhlungu ngokwenene, kodwa phantse akusoze kube kubi kakhulu.

Senza ntoni xa soyika?

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

Ukuba amava aso ayakugwaza

  • Faka inxeba emanzini ashushu, ashushu kangangoko umntu angakwazi ukunyamezela ngaphandle kokutshiswa (wavavanye ngesandla sakho), imizuzu engama-30 ukuya kwengama-90. Fumana uncedo lwezonyango, ingakumbi kwii-stonefish nakwii-stingray.

Soloko utsalela inombolo kaxakeka kuqala (112, 000, 911). Esi sisikhokelo soncedo lokuqala ngokubanzi, asilocebiso lwezonyango. Iziseko zoncedo lokuqala

Hlala ukhuselekile

  • Ungaze uchukumise, ubambe okanye uqhule isilwanyana sasendle, nokuba sincinci, kwaye nokuba sibonakala silele okanye sifile.
  • Sinike indawo. Ukuba udibana naso, hlala uzolile, buyela umva kancinci kwaye usiyeke sihambe ngendlela yaso.
  • Ukuba amava aso ayakugwaza: hlala uzolile, musa ukushukuma, tsalela inombolo kaxakeka (112, 000, 911) okanye uye esibhedlele ngokukhawuleza. Khumbula ukuba sasikhangeleka njani, ifoto iyanceda.

Asikuzingeli. Sisebenzisa ityhefu yaso ukubamba ukutya okanye ukuzikhusela, kwaye singakhetha ukuzimela. Okungakumbi malunga nokuhlala ukhuselekile

Phi emhlabeni?

IAfrikaIAsiyaIYurophuuMntla MelikauMzantsi MelikaIOstreliya neOceaniaIAntarcticauLwandlekazi lwePasifikiuLwandlekazi lweAtlantikiuLwandlekazi lwaseIndiyauLwandlekazi lweArcticuLwandlekazi oluseMazantsiuLwandle lweMediterauLwandle lwaseMntla (North Sea)

Sikhulu kangakanani?

Side kangakanani?

Spiny dogfish malunga ne-84 cm ubude (2,8 ft)Ikati yasekhaya malunga ne-50 cm (1,6 ft)Inja malunga ne-1 m (3,3 ft)
ubude obulingana neekati zasekhaya eziyi-1,5 ukusuka empumlweni ukuya emsileniubude obulingana neebhanana eziyi-5 zilandelelanasingaqubha ubude bechibi elikhulu lokuqubha (50 m) ngemizuzwana eyi-9

U-Spiny dogfish mkhulu kangakanani xa uthelekisa NAWE?

Zizibalo nje kwibhrawuza yakho. Akukho nto igcinwayo okanye ithunyelwa naphi na.

Sikhawuleza kangakanani?

kufanelekile ukwazi

Iinyaniso

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

Umqhekezi weentsomi

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

Inyaniso: 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

Kwiingcali zetyhefu

Igama lenzululwazi
Squalus acanthias
Iqela
Iintlanzi ezinetyhefu
Usapho
Squalidae2
Ucwangco
Squaliformes
Amazwekazi
uLwandlekazi lweAtlantiki, uLwandlekazi lwePasifiki, uLwandlekazi lwaseIndiya, uLwandle lweMeditera, uLwandlekazi oluseMazantsi, uLwandlekazi lweArctic, IAntarctica, uLwandle lwaseMntla (North Sea), Iilwandlekazi
Iintsana
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
Imeko yaso endle
Vulnerable globally; Critically endangered in the Northeast Atlantic1
Ingozi ebantwini
2 / 5: Kubuhlungu3

Apho iinyaniso zivela khona

  1. Spiny dogfish (Wikipedia (CC BY-SA 4.0))
  2. Squalus acanthias (iNaturalist): amagama nokuhlelwa.
  3. Venom Wiki: inqanaba lengozi, ubungakanani obuqhelekileyo noqikelelo lwesantya zezethu. Bona indlela esizifumana ngayo: Indlela esilinganisa ngayo ingozi.

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