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Given Names
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French
: Aiguillat coq
German : N/A
Spanish : Galludo; Agullat fosc; quelva, quissona; Aallat
Italian : Spinarolo bruno; Cadutu; Aguseo; Smoca; Archilao
Other Scientific Names : N/A |
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Diagnosis
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| A moderately-sized
dogfish with two spined dorsal fins and no anal fin. First dorsal fin spine
almost equal in height to the apex of the fin; second dorsal fin spine
taller than fin (compare with S. acanthias) and often measuring more than
6% of TL. First dorsal fin origin above pectoral inner margins. Small lateral
keels on lower sides of caudal peduncle; precaudal pit present; caudal fin
without subterminal notch. No white spots on body. Dorsal colour grey
or grey-brown, often rather sandy; dorsal fins with lighter edges, especially
in juveniles; ventral surfaces paler or white. |
|
Size
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| Maximum
ca. 100cm; mostly less than 90cm; size at birth about 23cm. |
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Distribution
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| Océan
Atlantique : From the Bay of Biscay (not common) southwards along the
Iberian coast where abundance increases; N.W. African coasts from Morocco
through Western Sahara and Canary Islands to Senegal and Cape Verde; range
extends through African equatorial waters where these sharks are sympatric
with other very similar spurdogs (shortnose spurdog Squalus megalops and
shortspine spurdog S. mitsukurii), with which they may be readily confused.
Mer Méditerranée : Very common. Entire Mediterranean,
Sea of Marmara and Black Sea.
Océan Indien : N/A
Océan Pacifique : N/A
|
|
Biology
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| Longnose
spurdogs are a common species found in warmer waters (above 10C) than S.
acanthias but over similar substrates and depths; ranging from the intertidal
to at least 440m over gently shelving sandy or muddy bottoms, especially near
offshore banks on continental slopes where these sharks may readily form
large schools. Ovoviviparous, with 3 to 9 embryos; one litter born every
two years. Females mature at ca. 60cm; males at ca. 50cm. |
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Feeding
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| Feeding
ecology similar to the piked dogfish, taking a variety of small teleosts
including mackerel, sometimes cephalopods such as squid; also crabs, lobsters
and other benthic invertebrates. |
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Similar Species
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| Some similar
species like the piked dogfish. |
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Endangerment
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| Unknwon. |
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Danger to humans
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| Harmless. |
