Australian crayfish
| Australian crayfish | ||||||||||||
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Australian crayfish ( Cherax quadricarinatus ) |
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Cherax quadricarinatus | ||||||||||||
| ( From Martens , 1868) |
The Australian crayfish ( Cherax quadricarinatus ; Latin quadricarinatus means "with four quills"), also known as Rotscherenkrebs (and English Red Claw , "Red Claw"), is one on the northeast coast of Australia and Papua New Guinea beheimateter crayfish of the genus Cherax . The English name Red Claw comes from the red blisters on the outside of the scissors of the males. First described and named this species was by Eduard von Martens, 1868. In his native Australia this is Cherax a popular dining cancer, which, like the Yabby ( Cherax destructor ) and the (maroon) Marron ( Cherax tenuimanus Smith, 1912 ) used in large farms becomes.
features
The males reach a body length of up to 30 cm including scissors and a weight of around 600 g. The females stay a little smaller. On the abdomen of this type of cancer, reddish stripes can be seen on the otherwise green-bluish body. Females, like all Cherax species, have their sexual openings (gonopores) on the third pair of striding legs. In males, the gonopores are located on the 5th pair of striding legs, and crescent-shaped red blisters can also be seen on the outside of the scissors.
distribution
Native habitat
The crayfish of this species are native to tropical Queensland and the Northern Territory in Australia. They occur predominantly in the rivers, the Gulf of Carpentaria and some east-flowing rivers of the northern Cape York Peninsula . This cancer is also found in southern Papua New Guinea. They live under stones, tree trunks and in caves and prefer slightly alkaline, clean and oxygen-rich water.
Aquaculture
For commercial use in aquaculture , the cancer was introduced in various countries in North and South America (e.g. Mexico, Jamaica), Southeast Asia (China) and Africa (South Africa).
literature
- Sven Gehrmann: Small river crayfish practice: crayfish in aquariums and garden ponds & keeping of lobsters Lobby for a dying nature, 2008, ISBN 978-3-9812553-9-3 , pp. 23-25.
- Uwe Werner: Cherax , especially Cherax quadricarinatus. In: Claus Schaefer, Torsten Schröer (Hrsg.): The large lexicon of aquaristics. 2 volumes. Eugen Ulmer, Stuttgart 2004, ISBN 3-8001-7497-9 , p. 221 f.
Individual evidence
- ↑ DHN Munasinghe, CP Burridge, CM Austin: The systematics of freshwater crayfish of the genus Cherax Erichson (Decapoda: Parastacidae) in eastern Australia re-examined using nucleotide sequences from 12S rRNA and 16S rRNA genes . In: Invertebrate Systematics . tape 18 , no. 2 , 2004, p. 215-225 , doi : 10.1071 / IS03012 .
Web links
- David Hoffmann: Species description Cherax quadricarinatus. Inland Waters invertebrates group, 2008, accessed February 28, 2011 .
- Brendan Johnson: Redclaw (Primary Industry & Fisheries, Queensland). Department of Employment, Economic Development and Innovation, Government of Queensland, June 10, 2010, accessed February 28, 2011 (Cherax quadricarinatus in Australian aquaculture).
- CM Austin, C. Jones & M. Wingfield: Cherax quadricarinatus. IUCN Red List of Threatened Species, 2009, accessed on February 28, 2011 (English, Red List of Threatened Species).
- Shane Ahyong: Australian Biological Resources Study: Cherax quadricarinatus. Australian Department of the Environment, Water, Heritage and the Arts , accessed February 28, 2011 (study by an Australian authority).