Species of fish
The marbled swordtail (Xiphophorus meyeri ) is a species of freshwater fish in the family Poeciliidae . It was endemic to the Rio Salado system (itself a part of the Rio Grande basin) in Coahuila , northeastern Mexico .[ 4] [ 5] It was restricted to springs, connected creeks and pools in waters with a pH slightly above neutral and temperatures of 16–26 °C (61–79 °F), with captive studies indicating that the optimum temperature is around 24 °C (75 °F).[ 1] [ 5] [ 6]
The marbled swordtail is considered extinct in the wild by the IUCN with the last wild record in 1997, meaning that it survives only in captivity.[ 1] Captive populations are maintained at the Xiphophorus Genetic Stock Center , Texas State University , United States,[ 1] and by XNP conservation project members, which include public aquariums, universities and private aquarists in several European countries and the United States.[ 7] [ 8] [ 9] The marbled swordtail shares the title as northernmost naturally distributed Xiphophorus with the closely related Monterrey platyfish (X. couchianus ) and northern platyfish (X. gordoni ).[ 5] [ 10] The specific name of this species honours the German ichthyologist Manfred K. Meyer .[ 11]
^ a b c d Almada-Villela, P.; Contreras-Balderas, S.; Hendrickson, D. (2019). "Xiphophorus meyeri " . IUCN Red List of Threatened Species . 2019 : e.T23158A2784905. doi :10.2305/IUCN.UK.2019-2.RLTS.T23158A2784905.en . Retrieved 15 November 2021 .
^ Schartl, Manfred; Schröder, Johannes Horst (1987). "A new species of the genus Xiphophorus Heckel 1848, endemic to northern Coahuila, Mexico (Pisces: Poeciliidae)" (PDF) . Senckenbergiana Biologica . 68 (4/6): 311–321.
^ Juan Miguel Artigas Azas, ed. (29 November 2012). "Xiphophorus marmoratus Obregón-Barboza & Contreras-Balderas, 1988" . The Freshwater Fishes of Mexico . Retrieved 3 July 2023 .
^ Froese, Rainer ; Pauly, Daniel (eds.). "Xiphophorus meyeri " . FishBase . September 2018 version.
^ a b c Ceballos, G.; E.D. Pardo; L.M Estévez; H.E. Pérez, eds. (2016). Los peces dulceacuícolas de México en peligro de extinción . Fondo de Cultura Económic. p. 283. ISBN 978-607-16-4087-1 .
^ "Northern Platyfish Husbandry Manual" . Österreichischen Verband für Vivaristik und Ökologie. Retrieved 17 January 2022 .
^ "XNP project annual report – year 3" . Österreichischen Verband für Vivaristik und Ökologie. Retrieved 17 January 2022 .
^ "XNP project expanding" . Österreichischen Verband für Vivaristik und Ökologie. Retrieved 17 January 2022 .
^ "Transfer of fish from Würzburg University to Ostrava ZOO" . Österreichischen Verband für Vivaristik und Ökologie. Retrieved 17 January 2022 .
^ Kang, J.H.; M. Schartl; R.B. Walter; A. Meyer (2013). "Comprehensive phylogenetic analysis of all species of swordtails and platies (Pisces: Genus Xiphophorus) uncovers a hybrid origin of a swordtail fish, Xiphophorus monticolus, and demonstrates that the sexually selected sword originated in the ancestral lineage of the genus, but was lost again secondarily" . BMC Evolutionary Biology . 13 (25): 25. Bibcode :2013BMCEE..13...25K . doi :10.1186/1471-2148-13-25 . PMC 3585855 . PMID 23360326 .
^ Christopher Scharpf; Kenneth J. Lazara (26 October 2019). "Order CYPRINODONTIFORMES: Families POECILIIDAE, ANABLEPIDAE, VALENCIIDAE, APHANIIDAE and PROCATOPODIDAE" . The ETYFish Project Fish Name Etymology Database . Christopher Scharpf and Kenneth J. Lazara. Retrieved 9 November 2019 .