Longnose spurdog: Difference between revisions
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The longnose spurdog has two [[dorsal fin]]s each of which has one [[anterior]] spine, but no [[anal fin]]. The eyes are distinctively large and green. The body is uniformly grey above. Males are identified by their [[valva|claspers]] (modified [[pelvic fin]]s used as [[intromittent organ]]s), while females have none. |
The longnose spurdog has two [[dorsal fin]]s each of which has one [[anterior]] spine, but no [[anal fin]]. The eyes are distinctively large and green. The body is uniformly grey above. Males are identified by their [[valva|claspers]] (modified [[pelvic fin]]s used as [[intromittent organ]]s), while females have none. |
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They feed on bony fishes, like [[porgy|porgies]], [[mackerel]] and [[percichthyid]]s, as well as [[crab]]s, [[lobster]]s, and [[octopi]]. Their reproduction is [[ovoviviparous]], with three to four young per litter. |
They feed on bony fishes, like [[porgy|porgies]], [[mackerel]] and [[percichthyid]]s, as well as [[crab]]s, [[lobster]]s, and [[octopi]]. Their reproduction is [[Ovoviviparity|ovoviviparous]], with three to four young per litter. |
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The longnose spurdog is a foodfish, being utilized fresh, dried and salted, and smoked for human consumption. |
The longnose spurdog is a foodfish, being utilized fresh, dried and salted, and smoked for human consumption. |
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Revision as of 20:23, 8 July 2006
| Longnose spurdog | |
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| Drawing by Dr Tony Ayling | |
| Scientific classification | |
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| Species: | S. blainville
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| Binomial name | |
| Squalus blainville (Risso, 1827)
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The longnose spurdog, Squalus blainville, is a dogfish shark of the genus Squalus, found over continental shelves in all oceans, at depths of between 15 and 800 metres. They reach one metre in length.
The longnose spurdog has two dorsal fins each of which has one anterior spine, but no anal fin. The eyes are distinctively large and green. The body is uniformly grey above. Males are identified by their claspers (modified pelvic fins used as intromittent organs), while females have none.
They feed on bony fishes, like porgies, mackerel and percichthyids, as well as crabs, lobsters, and octopi. Their reproduction is ovoviviparous, with three to four young per litter.
The longnose spurdog is a foodfish, being utilized fresh, dried and salted, and smoked for human consumption.
References
- Froese, Rainer; Pauly, Daniel (eds.) (2006). "Squalus blainville" in FishBase. March 2006 version.
- Tony Ayling & Geoffrey Cox, Collins Guide to the Sea Fishes of New Zealand, (William Collins Publishers Ltd, Auckland, New Zealand 1982) ISBN 0-00-216987-8