Dogfish: Difference between revisions
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{{Copyedit|for=style and cohesion|date=March 2008}} |
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:''In freshwater lakes and rivers, "Dogfish" refers to a member of the [[Bowfin]] family.'' |
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[[Image:NSRW Dogfish.png|thumb|300px]] |
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[[Image:dogfish caught.jpg|thumb|300px|Note the fisherman carefully avoiding the venomous spine near the rear [[dorsal fin]]]] |
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The name '''dogfish''', derived from a [[compound (linguistics)|compound]] of "[[dog]]" and "[[fish]]", is applied to a number of small [[shark]]s found in the northeast [[Atlantic Ocean|Atlantic]], [[Pacific Ocean|Pacific]], and [[Mediterranean Sea|Mediterranean]], especially to those in the three [[Family (biology)|families]] [[Scyliorhinidae]], [[Dalatiidae]] and [[Squalidae]]. Although often used in reference to ''[[Scyliorhinus canicula]]'', the name is applied only loosely and does not usually signify a close taxonomic relationship. |
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(Squalus acanthias) -- This small, slender shark has a flattened head and a snout that tapers to a blunt tip. It averages 2 1/2 to 3 feet in length with the largest growing to 4 feet or more. Records show that they can live from 25 to 30 years. |
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Its mouth is full of low, flat, grinding teeth like the smooth dogfish, but the spiny dogfish also possesses an extra set of small, very sharp teeth. |
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The spiny dogfish, ''[[Squalus acanthias]]'', is the most common shark in the western Atlantic. It hunts both alone and in groups with other dogfish. It eats small fish, [[squid]], and [[crustacean]]s, and has extremely strong jaws for crushing shells. |
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Dogfish are considered a nuisance by fishermen because they will latch on to almost anything put in the water, including human hands. Fishermen kill them when caught which, along with pollution, has contributed to a sharp decline in population in [[Puget Sound]]. It is now illegal to kill or mutilate them when caught even though at a time, they were considered a delicacy by Europeans. |
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Care must be taken when handling dogfish due to the two venomous spines at the back of both [[dorsal fin]]s. The venom is not likely to cause major damage, but the wound can take months to heal. |
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==References== |
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* [http://www.sea-fishing.org/sea-dogfish.html Dogfish] UK |
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* [http://www.beach-net.com/Sharkspinydog.html Spiny Dogfish and other Sharks] |
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[[Category:Sharks]] |
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{{shark-stub}} |
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[[ar:كلب البحر]] |
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Revision as of 19:16, 28 April 2008
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