Fine tooth shark
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Fine tooth shark ( Carcharhinus isodon ) |
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| Carcharhinus isodon | ||||||||||||
| ( Müller & Henle , 1839) |
The fine tooth shark ( Carcharhinus isodon ) is a species of the genus Carcharhinus within the Requiem sharks (Carcharhinidae). The distribution area of this species extends from New York to Florida to the Gulf of Mexico , and there is also a population off the coast of Brazil .
Appearance and characteristics
The fine-toothed shark is a medium-sized shark with a maximum length of around 190 centimeters, with an average length of around 150 centimeters. He has a blue-gray back color and a white belly. There may be an indistinct white band on the sides of the body.
It has an anal fin and two dorsal fins . The first dorsal fin begins at about the same level as the very small pectoral fins. There is no interdorsal ridge . The muzzle is elongated and the eyes are comparatively large. Like all species of the genus, the animals have five gill slits and no injection hole . The gill slits are very long compared to other species of the genus. It is named after the almost uniform teeth in the lower and upper jaw ( isodon = "same tooth "). These are slender and upright.
Way of life
The fine tooth shark lives near the coast above the continental shelf . It has a predatory diet , with small bony fish and various squids being part of its food spectrum. The shark forms groups called schools and is likely to migrate seasonally.
Like other species of the genus, it is viviparous and forms a yolk sac placenta ( placental viviparous ). The female gives birth to 1 to 6 young sharks, they are around 50 to 60 centimeters in size. For birth, the mother sharks migrate to shallow water areas close to the banks.
distribution
The distribution area of the fine-toothed shark is limited to the western Atlantic . It occurs along the coast from New York via Florida to the Gulf of Mexico , and there is also a population off the coast of Brazil . Another population off the coast of Senegal is assumed, but is not certain.
literature
- Kuno Sch. Steuben : The sharks of the seven seas: species, way of life and sporting catch. Parey, Berlin 1989, ISBN 3-490-44314-4 , pp. 85 and 98.
Web links
- Species portrait on hai.ch
- Fine tooth shark on Fishbase.org (English)
- Carcharhinus isodon onthe IUCN 2013 Red List of Threatened Species . Posted by: Carlson, J., Kyne, PM & Valenti, SV, 2008. Retrieved December 4, 2013.