Marbled swordtail explained

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.[1] It was restricted to springs, connected creeks and pools in waters with a pH slightly above neutral and temperatures of, with captive studies indicating that the optimum temperature is around .[2]

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. Captive populations are maintained at the Xiphophorus Genetic Stock Center, Texas State University, United States, and by XNP conservation project members, which include public aquariums, universities and private aquarists in several European countries and the United States.[3] [4] [5] The marbled swordtail shares the title as northernmost naturally distributed Xiphophorus with the closely related Monterrey platyfish (X. couchianus) and northern platyfish (X. gordoni).[6] The specific name of this species honours the German ichthyologist Manfred K. Meyer.[7]

Notes and References

  1. Book: Ceballos, G. . E.D. Pardo . L.M Estévez . H.E. Pérez . 2016 . Los peces dulceacuícolas de México en peligro de extinción . 283 . Fondo de Cultura Económic . 978-607-16-4087-1 .
  2. Web site: Northern Platyfish Husbandry Manual . Österreichischen Verband für Vivaristik und Ökologie . 17 January 2022 .
  3. Web site: XNP project annual report – year 3 . Österreichischen Verband für Vivaristik und Ökologie . 17 January 2022 .
  4. Web site: XNP project expanding . Österreichischen Verband für Vivaristik und Ökologie . 17 January 2022 .
  5. Web site: Transfer of fish from Würzburg University to Ostrava ZOO . Österreichischen Verband für Vivaristik und Ökologie . 17 January 2022 .
  6. 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 . 10.1186/1471-2148-13-25 . 23360326 . 3585855 . free . 2013BMCEE..13...25K .
  7. Web site: Order CYPRINODONTIFORMES: Families POECILIIDAE, ANABLEPIDAE, VALENCIIDAE, APHANIIDAE and PROCATOPODIDAE . The ETYFish Project Fish Name Etymology Database . Christopher Scharpf . Kenneth J. Lazara . 26 October 2019 . 9 November 2019 . Christopher Scharpf and Kenneth J. Lazara.

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