Largefin pupfish

The largefin pupfish (Cyprinodon verecundus), also known as cachorrito de dorsal larga, is a small species of pupfish in the family Cyprinodontidae.[2] It is endemic to Lake Chichancanab in Quintana Roo, Mexico. In almost all places, different Cyprinodon species do not overlap in their range, but there are two notable exceptions and one of these is Lake Chichancanab, which is inhabited by C. verecundus, C. beltrani, C. esconditus, C. labiosus, C. maya, C. simus and C. suavium (the other place where several Cyprinodon species live together are lakes in San Salvador Island, the Bahamas). Living together, the Cyprinodon species in Lake Chichancanab have diverged into different niches. Pupfish typically feed on algae and detritus. In Lake Chichancanab, however, C. verecundus has become an amphipod- and bivalve-eater.[3]

Largefin pupfish
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Cyprinodontiformes
Family: Cyprinodontidae
Genus: Cyprinodon
Species:
C. verecundus
Binomial name
Cyprinodon verecundus
Humphries, 1984

The IUCN last reviewed C. verecundus in 2019 when it considered the species to be vulnerable to extinction.[1] Among the endemic Cyprinodon species in Lake Chichancanab, only C. beltrani and C. labiosus still occur in some numbers in their habitat, while the remaining are virtually—if not fully—extinct in the wild. At least some of these, including C. verecundus, survive in captivity.[3][4] The primary reason for their decline is introduced species, notably the Nile tilapia and the tetra Astyanax fasciatus.[3][5]

References
  1. Contreras MacBeath, T.; Schmitter-Soto, J. (2019). "Cyprinodon verecundus". IUCN Red List of Threatened Species. 2019: e.T6170A3107217. doi:10.2305/IUCN.UK.2019-2.RLTS.T6170A3107217.en. Retrieved 17 November 2021.
  2. Froese, Rainer; Pauly, Daniel (eds.) (2019). "Cyprinodon verecundus" in FishBase. August 2019 version.
  3. Martin, C.; P.C. Wainwright (2011). "Trophic novelty is linked to exceptional rates of morphological diversification in two adaptive radiations of Cyprinodon pupfish". Evolution. 65 (8): 2197–2212. doi:10.1111/j.1558-5646.2011.01294.x. PMID 21790569. S2CID 23695342.
  4. Martin, C.H.; Crawford, J.E.; Turner, B.J.; Simons, L.H. (2016). "Diabolical survival in Death Valley: recent pupfish colonization, gene flow and genetic assimilation in the smallest species range on earth". Proc Biol Sci. 283 (1823): 20152334. doi:10.1098/rspb.2015.2334. PMC 4795021. PMID 26817777.
  5. Strecker, U. (2006). "The impact of invasive fish on an endemic Cyprinodon species flock (Teleostei) from Laguna Chichancanab, Yucatan, Mexico". Ecology of Freshwater Fish. 15 (4): 408–418. doi:10.1111/j.1600-0633.2006.00159.x. S2CID 56230830.


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