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Spiny dogfish

Squalus acanthias

Tentang nama: The species name acanthias refers to the shark's two spines.1

Sakit sahajaJangan sentuhIa sakit, tetapi tidak akan mencederakan kamu dengan serius.

Ikan berbisa

Duri berbisaMakan: Daging

Bahaya kepada manusia: MenyakitkanIa boleh jadi sangat sakit, tetapi hampir tidak pernah serius.

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

Hidup di

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

Lautan Atlantik, Lautan Pasifik, Lautan Hindi, Laut Mediterranean, Lautan Selatan, Lautan Artik, Antartika, Laut Utara

Laman utama

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

Panjang

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

Kelajuan maksimum

kira-kira 20 km/j (12 mph)

Berenang, anggaran kasar

Apa yang ia makan?

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

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

Cara mengenalinya

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

Sering dikelirukan dengan: 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

Kuasa bisa

Duri berbisa

Duri tajam membawa bisa. Memijak atau memegangnya menyakitkan.

Apa kesan bisanya?

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

Berapa bahaya ia kepada manusia?

Bahaya kepada manusia: MenyakitkanIa boleh jadi sangat sakit, tetapi hampir tidak pernah serius.

Apa yang ia buat apabila takut?

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

Jika durinya menikam kamu

Rendam luka dalam air panas, sepanas yang orang itu boleh tahan tanpa melecur (uji dengan tangan kamu sendiri), selama 30 hingga 90 minit. Dapatkan bantuan perubatan, terutamanya untuk ikan batu dan ikan pari.

Sentiasa hubungi nombor kecemasan dahulu (112, 000, 911). Ini panduan pertolongan cemas umum, bukan nasihat perubatan. Asas pertolongan cemas

Kekal selamat

Jangan sesekali sentuh, tangkap atau usik haiwan liar, walaupun yang kecil, dan walaupun ia nampak tidur atau mati.
Beri ia ruang. Jika kamu terjumpa, bertenang, undur perlahan-lahan dan biarkan ia pergi.
Jika durinya menikam kamu: bertenang, jangan bergerak, hubungi nombor kecemasan (112, 000, 911) atau pergi ke hospital dengan segera. Ingat rupanya, gambar boleh membantu.

Ia bukan mahu memburu kamu. Ia guna bisanya untuk menangkap makanan atau melindungi diri, dan ia lebih suka bersembunyi. Lagi tentang keselamatan

Di mana di dunia?

Afrika Asia Eropah Amerika Utara Amerika Selatan Australia & Oceania Antartika Lautan Pasifik Lautan Atlantik Lautan Hindi Lautan Artik Lautan Selatan Laut Mediterranean Laut Utara

Berapa besar ia?

Berapa panjang ia?

sepanjang 1.5 ekor kucing rumah dari hidung ke ekorsepanjang 5 biji pisang disusun hujung ke hujungboleh berenang sepanjang kolam renang besar (50 m) dalam 9 saat

Berapa besar Spiny dogfish berbanding KAMU?

Hanya matematik dalam pelayar kamu. Tiada apa yang disimpan atau dihantar ke mana-mana.

Berapa laju ia?

Perenang Olimpik kira-kira 8 km/j (5 mph)

Spiny dogfish kira-kira 20 km/j (12 mph)

Ikan lumba-lumba pada kelajuan penuh kira-kira 35 km/j (22 mph)

berguna untuk diketahui

Fakta

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

Pemecah mitos

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

Hakikat: 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

Untuk pakar bisa

Nama saintifik: Squalus acanthias
Kumpulan: Ikan berbisa
Keluarga: Squalidae2
Susunan: Squaliformes
Benua-benua: Lautan Atlantik, Lautan Pasifik, Lautan Hindi, Laut Mediterranean, Lautan Selatan, Lautan Artik, Antartika, Laut Utara, Lautan
Anak: 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
Keadaannya di alam liar: Vulnerable globally; Critically endangered in the Northeast Atlantic1
Bahaya kepada manusia: 2 / 5: Menyakitkan3

Dari mana fakta datang

Spiny dogfish (Wikipedia (CC BY-SA 4.0))
Squalus acanthias (iNaturalist): nama dan pengelasan.
Venom Wiki: tahap bahaya, saiz biasa dan anggaran kelajuan adalah penilaian kami sendiri. Lihat cara kami mengiranya: Cara kami menilai bahaya.

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