Golden cownose ray

The golden cownose ray or Pacific cownose ray (Rhinoptera steindachneri) is a species of eagle ray, family Myliobatidae. It is found in the East Pacific along the coast of Colombia, Costa Rica, Ecuador, El Salvador, Guatemala, Honduras, Mexico, Nicaragua, Panama, and Peru.[2] Its natural habitats are open seas, shallow seas, subtidal aquatic beds, estuarine waters, intertidal marshes, and coastal saline lagoons.[2] They are often in schools, and sometimes associated with the spotted eagle ray.[3]

Golden cownose ray
Scientific classification
Kingdom:
Animalia
Phylum:
Chordata
Class:
Chondrichthyes
Subclass:
Elasmobranchii
Order:
Myliobatiformes
Family:
Myliobatidae
Genus:
Rhinoptera
Species:
R. steindachneri
Binomial name
Rhinoptera steindachneri

Like all members of eagle rays, they demonstrate ovoviviparity.[3] Ovulation and birth occurred in May, June and July, with a low fecundity, large size at maturity and birth and a continuous and synchronous annual reproductive cycle.[4]

According to J. Bizzarro, Wade Smith, J. Fernando Márquez-Farías, and Robert E. Hueter, these rays are not of much value within fisheries and are harmless to humans, however one of the main threats to this species is overexploitation and habitat destruction.[3][5]

The parasites that inhabit this species are most influenced by body size, diet, and feeding behavior.[6]

References
  1. Pollom, R.; Avalos, C.; Bizzarro, J.; Burgos-Vázquez, M.I.; Cevallos, A.; Espinoza, M.; González, A.; Herman, K.; Mejía-Falla, P.A.; Morales-Saldaña, J.M.; Navia, A.F.; Pérez Jiménez, J.C.; Sosa-Nishizaki, O.; Velez-Zuazo, X. (2020). "Rhinoptera steindachneri". IUCN Red List of Threatened Species. 2020: e.T60130A124442442. doi:10.2305/IUCN.UK.2020-3.RLTS.T60130A124442442.en. Retrieved 17 November 2021.
  2. "The IUCN Red List of Threatened Species". IUCN Red List of Threatened Species. Retrieved 2019-09-30.
  3. "Rhinoptera steindachneri summary page". FishBase. Retrieved 2019-09-30.
  4. Burgos-Vázquez, María I.; Chávez-García, Valeria E.; Cruz-Escalona, Víctor H.; Navia, Andrés F.; Mejía-Falla, Paola A. (2019-01-21). "Reproductive strategy of the Pacific cownose ray Rhinoptera steindachneri in the southern Gulf of California". Marine and Freshwater Research. 70 (1): 93–106. doi:10.1071/MF18096. ISSN 1448-6059.
  5. Bizzarro, Joseph J.; Smith, Wade D.; Márquez-Farías, J. Fernando; Hueter, Robert E. (April 2007). "Artisanal fisheries and reproductive biology of the golden cownose ray, Rhinoptera steindachneri Evermann and Jenkins, 1891, in the northern Mexican Pacific". Fisheries Research. 84 (2): 137–146. doi:10.1016/j.fishres.2006.10.016. ISSN 0165-7836.
  6. Violante-González, Juan; Santos-Bustos, Nataly G.; Monks, Scott; Pulido-Flores, Griselda; García-Ibáñez, Sergio; Rojas-Herrera, Agustín A. (2018-05-11). "Parasite community of the golden cownose ray Rhinoptera steindachneri Evermann and Jenkins 1891 (Chondrichthyes: Myliobatidae), in Acapulco Bay, Guerrero, Mexico". Journal of Natural History. 52 (17–18): 1115–1131. doi:10.1080/00222933.2018.1452305. ISSN 0022-2933.
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