Bathytoshia centroura
| Bathytoshia centroura | ||||||||||||
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Bathytoshia centroura |
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| Scientific name | ||||||||||||
| Bathytoshia centroura | ||||||||||||
| ( Mitchill , 1815) |
Bathytoshia centroura is a stingray species and lives close to the coast in independent populations in the northwest, southwest and eastern Atlantic and in the Mediterranean .
features
Bathytoshia centroura has a diamond-shaped pectoral fin disc that is 1.2 to 1.3 times wider than it is long, with rather straight lateral lines that taper off to the right and left relatively pointedly. It reaches a disc width of a maximum of 2.6 meters and a length of up to 4 meters, with a maximum weight of 300 kg, with females becoming larger than males. The top is dark brown to olive brown, the underside raw white.
Way of life
The ray lives in incoherent coastal areas of the Atlantic: off the east coast of the USA between New England and the Gulf of Mexico , in the east Atlantic between the Bay of Biscay and Angola , including the Mediterranean and the coastal waters of the Canary Islands , and occasionally off South America between Venezuela and Argentina . It is a versatile predatory fish that feeds on the available prey of the respective habitat. It mostly hunts close to the ground, but also regularly in open water. Bathytoshia centroura is ovoviviparous with litters of four to six young animals. The larvae hatch in the womb, but remain in the rear part of the fallopian tube , which takes over the function of the uterus . The embryos feed on their yolk supply and via villus-like secretion channels through which they are supplied with nutrient fluid by the mother fish. The young rays are born with disc widths of 34 to 37 cm in the northwest and 8 to 13 cm in the eastern Atlantic.
Systematics
The ray species was described in 1815 by the American naturalist Samuel Latham Mitchill under the scientific name Raja centroura , later assigned to the genus Dasyatis . When the Dasyatidae were revised in mid-2016 , the species was placed in the genus Bathytoshia .
swell
- Mitchill, SL (1815): The fishes of New York described and arranged . Transactions of the Literary and Philosophical Society of New York 1: 355-492.
- Fricke, R., Bilecenoglu, M. & H. Musa Sari (2007): Annotated checklist of fish and lamprey species (Gnathostomata and Petromyzontomorphi) of Turkey, including a Red List of threatened and declining species . Stuttgart Contributions to Natural History. Ser. A (Biol.), 706: 1-174.
- Hamlett, WC, Eulitt, MA, Jarrell, RL & MA Kelly (1993): Uterogestation and Placentation in Elasmobranchs . J. Exp. Zool. 266: 347-367.
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
- Bathytoshia centroura on Fishbase.org (English)
- Bathytoshia centroura on the IUCN Red List