Banded bamboo shark
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Banded Bamboo Shark ( Chiloscyllium punctatum ) |
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| Chiloscyllium punctatum | ||||||||||||
| Müller & Henle , 1838 |
The brown-banded bamboo shark ( Chiloscyllium punctatum ) is a shark from the family of bamboo sharks (Hemiscylliidae).
features
With a maximum length of 105 centimeters, the species is the largest species of the genus Chiloscyllium ; adult animals usually measure less than a meter. The body and tail are slender as in other species of the genus. The young animals are conspicuously marked with dark spots and clear dark brown cross bars. This banding is also expressed in the German-language species name, although these drawings fade or disappear completely in the adult animals. The adult specimens of the brown-banded bamboo shark are therefore almost a monochrome light brown. The gill slits are very light.
The mouth lies clearly in front of the eyes, which are quite large for the species. Both the dorsal fins and the anal fin start very far back on the body. The first dorsal fin starts above the middle of the pelvic fins and the beginning of the anal fin is far behind the end of the second dorsal fin. The rear edges of the dorsal fins are concave and each has a free and pointed lower end.
distribution and habitat
The brown-banded bamboo shark is native to the east of the Indian Ocean off India and Sri Lanka and along the coasts of Southeast Asia and Oceania to the north coast of Australia . In the north, it is distributed in the China Sea along the entire Asian coast to Korea and Japan .
It lives mainly in coral reefs close to the coast on the continental shelf in the area of the tidal zone , whereby it can also be found in residual ponds after the high tide , and probably also in the area of soft sandy bottoms.
Way of life
The brown-banded bamboo shark spends the day hidden in reef crevices and hunts for small bony fish and invertebrates at night . Out of the water, the shark can survive for up to half a day.
The species is oviparous (laying eggs) and lays round egg capsules 13 to 17 centimeters long and 11 centimeters wide. When hatching, the young sharks have a length of about 13 centimeters. The males probably reach sexual maturity with a length of around 60 centimeters, for the females there is no information.
Relationship to people
The brown-banded bamboo sharks are classified as harmless to humans due to their small size. They are commonly caught by inshore fishermen in India, Sri Lanka and other states where they are used as food. They can be affected by overfishing and major changes in their habitats near the coast, particularly the destruction of coral reefs. The International Union for Conservation of Nature (IUCN) lists the species accordingly on the early warning list ("Near Threatened") of endangered species, but notes that there are none for the coasts of Australia, where it is not fished and often lives in protected reef areas There is a risk.
supporting documents
- ↑ Chiloscyllium punctatum in the IUCN Red List of Threatened Species 2010.2. Posted by: Bennett, MB & Kyne, PM (SSG Australia & Oceania Regional Workshop, March 2003), 2003. Retrieved July 2, 2010.
literature
- LJV Compagno : Sharks of the world. An annotated and illustrated catalog of shark species known to date. Volume 2. Bullhead, mackerel and carpet sharks (Heterodontiformes, Lamniformes and Orectolobiformes). FAO Species Catalog for Fishery Purposes. No. 1, Vol. 2. FAO Rome 2001 ( complete PDF , species portrait )
- Leonard Compagno, Marc Dando, Sarah Fowler: Sharks of the World. Princeton Field Guides, Princeton University Press , Princeton and Oxford 2005, page 168, ISBN 978-0-691-12072-0
Web links
- Brown-banded bamboo shark on Fishbase.org (English)