Hemitrygon fluviorum
| Hemitrygon fluviorum | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Hemitrygon fluviorum |
||||||||||||
| Systematics | ||||||||||||
|
||||||||||||
| Scientific name | ||||||||||||
| Hemitrygon fluviorum | ||||||||||||
| ( Ogilby , 1908) |
Hemitrygon fluviorum is a species of stingray and lives in estuaries and mangroves on the north and east coast of Australia , as well as on the south coast of New Guinea.
features
Hemitrygon fluviorum has a diamond-shaped pectoral fin disc that is strongly rounded on the sides. It reaches a pane width of 93 and a length of 120 cm and weighs a maximum of about 6 kg. The upper side is yellow-brown to green-brown, lighter at the edges, darker towards the tail. The underside is white.
Way of life
The rays live in shallow marine water at depths of one to 40 meters and in the brackish water of estuaries between Forster and Proserpine on the East Australian coast and on the south coast of New Guinea. Occasionally it invades freshwater areas of rivers. Even if it is said to eat oysters and other farmed mussels, it mainly feeds on small crabs and polystyrene . Hemitrygon fluviorum is ovoviviparous , the young animals have a disc width of 11 at birth and a length of about 35 cm. In the uterus, the embryos first feed on the egg yolk, then on a slimy fluid that is secreted from the uterus and enriched with fat and proteins.
Systematics
The ray species was described in 1908 by the Australian zoologist James Douglas Ogilby under the scientific name Dasyatis fluviorum . When the Dasyatidae was revised in mid-2016 , the species was placed in the genus Hemitrygon .
literature
- Kent E. Carpenter & Volker H. Niem: The Living Marine Resources of the Western Central Pacific. Volume 3. Batoid fishes, chimaeras and Bony fishes part 1 (Elopidae to Linophrynidae). Rome, FAO. 1998, ISBN 92-5-104302-7 , page 1500.
Individual evidence
- ↑ Last, PR, Naylor, GJP & Manjaji-Matsumoto, BM (2016): A revised classification of the family Dasyatidae (Chondrichthyes: Myliobatiformes) based on new morphological and molecular insights. Zootaxa , 4139 (3): 345-368. doi: 10.11646 / zootaxa.4139.3.2
Web links
- Hemitrygon fluviorum on Fishbase.org (English)
- Hemitrygon fluviorum on the IUCN Red List