Australian blacktip shark
| Australian blacktip shark | ||||||||||||
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Australian blacktip shark ( Carcharhinus tilstoni ) |
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| Carcharhinus tilstoni | ||||||||||||
| ( Whitley , 1950) |
The Australian blacktip shark ( Carcharhinus tilstoni ) is a species of the genus Carcharhinus within the Requiem sharks (Carcharhinidae). The distribution area extends over the coastal areas of northern and tropical Australia .
Appearance and characteristics
The Australian blacktip shark is a medium-sized shark with an average size of 120 to 140 cm and maximum lengths of up to 160 cm. He has a gray to bronze colored back and a white belly. All fins of this shark have black fin tips, with the exception of the pelvic fins and the anal fin.
The shark has a long, pointed snout and large, round eyes. It has an anal fin and two dorsal fins . The first dorsal fin is comparatively high and pointed like a sickle, it lies above or slightly behind the beginning of the free end of the pectoral fins. There is no interdorsal ridge . The second dorsal fin is comparatively high and begins slightly before the attachment of the anal fin. The pectoral fins are relatively large and sickle-shaped. Like all species of the genus, the animals have five gill slits and no injection hole .
Way of life
The Australian blacktip shark lives as a common species near the coast in the area of the continental shelf and on island bases from the shore zone to depths of around 150 m. He prefers the area immediately below the surface of the water. It feeds predatory on various bony fish and invertebrates, especially squid .
Reproduction
Like other species of the genus, it is viviparous and forms a yolk sac placenta ( placental viviparous ). The females give birth to one to six young animals after a gestation period of around 10 months. The young sharks have a size of about 60 centimeters and are born near the coast. The slowly growing animals reach sexual maturity after three to four years at a length of about 110 to 115 cm.
distribution
The distribution area of the Australian blacktip shark extends over the coastal areas of northern and tropical Australia .
literature
- Leonard Compagno , Marc Dando, Sarah Fowler: Sharks of the World . Princeton University Press , Princeton and Oxford 2005, ISBN 978-0-691-12072-0 , p. 307.
Web links
- Species portrait on hai.ch
- Australian blacktip shark on Fishbase.org (English)
- Carcharhinus tilstoni inthe IUCN 2013 Red List of Threatened Species . Submitted by: Pillans, R. & Stevens, J. (SSG Australia & Oceania Regional Workshop, March 2003), 2003. Retrieved December 4, 2013.