Broadnose chimaera
| Broadnose chimaera | |
|---|---|
| |
Scientific classification 
| |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Chondrichthyes |
| Subclass: | Holocephali |
| Order: | Chimaeriformes |
| Family: | Rhinochimaeridae |
| Genus: | Rhinochimaera |
| Species: | R. atlantica
|
| Binomial name | |
| Rhinochimaera atlantica | |
The broadnose chimaera, knifenose chimaera, spearnose chimaera, Atlantic long-nosed chimaera, or straightnose rabbitfish (Rhinochimaera atlantica) is a species of fish in the family Rhinochimaeridae found near Canada, Colombia, France, Gambia, Iceland, Mauritania, Mexico, Namibia, Senegal, South Africa, Suriname, and the United States.[2]
Description
[edit]Rhinochimaera atlantica was described in 1909, having been discovered on the continental slope southwest of Ireland, and, as of 2021, it is the only long-nosed chimaera to have been described from European waters.[3] It has an approximate total length of 15 centimetres (5.9 in) at birth, and reach maturity at 107 centimetres (42 in) total length for males and 127.4 centimetres (50.2 in) total length for females. R. atlantica has a long snout and a straight head profile. Their first dorsal fin is triangular, and the spine of the fin extends beyond the fin tip. It is similar in appearance to Rhinochimaera pacifica, but the two have distinct genetic profiles.[4] They have a maximum total length of at least 147 centimetres (58 in).[5]
Distribution and habitat
[edit]Rhinochimaera atlantica occurs primarily over soft substrate, and has been found in depths from 400–1,849 metres (1,312–6,066 ft).[4] Its natural habitat is open seas.[1]
Reproduction
[edit]Rhinochimaera atlantica is oviparous.[4] Its egg case is spindle shaped, with a convex dorsal side and a concave ventral side. It has a wide flange which is ribbed, and the spindle has a teardrop shape.[6]
Conservation
[edit]Rhinochimaera atlantica is categorised as Least Concern on the IUCN Red List as it is not targeted and only occasionally taken as a bycatch by trawling fisheries, with no known impact on the population.[5]
References
[edit]- ^ a b Finucci, B. (2020). "Rhinochimaera atlantica". IUCN Red List of Threatened Species. 2020 e.T60145A124444407. doi:10.2305/IUCN.UK.2020-2.RLTS.T60145A124444407.en. Retrieved 17 November 2021.
- ^ McEachran, J.; Fechhelm, J.D. (1998). Fishes of the Gulf of Mexico, Vol. 1: Myxiniformes to Gasterosteiformes. Fishes of the Gulf of Mexico. Austin: University of Texas Press. p. 42. ISBN 978-0-292-75206-1. OCLC 38468784. Retrieved 13 July 2021.
- ^ Ebert, David A.; Dando, Marc (2021). Field Guide to Sharks, Rays, and Chimaeras of Europe and the Mediterranean. Princeton, New Jersey: Princeton University Press. p. 58. ISBN 978-0-691-20598-4.
- ^ a b c Ebert, David A.; Dando, Marc (2021). Field Guide to Sharks, Rays and Chimaeras of Europe and the Mediterranean. Princeton, New Jersey: Princeton University Press. p. 62. ISBN 978-0-691-20598-4.
- ^ a b Finucci, B. (2020). "Rhinochimaera atlantica". The IUCN Red List of Threatened Species 2020.
- ^ Ebert, David A.; Dando, Marc (2021). Field Guide to Sharks, Rays, and Chimaeras of Europe and the Mediterranean. Princeton, New Jersey: Princeton University Press. p. 48. ISBN 978-0-691-20598-4.
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