Poecilia reticulata

Where introduced, P. reticulata has been documented to have adverse impacts on native fishes, amphibians, and invertebrates through competition, predation, and disease.

Where introduced, P. reticulata has been documented to have adverse impacts on native fishes, amphibians, and invertebrates through competition, predation, and disease.

Another example of negative impact include the appearance of parasites such as the anchor worm Laernaea cyprinacea Linnaeus 1758 in the native two-spot astyanax Astyanax cf. bimaculatus Linnaeus 1758 due to the presence of contaminated introduced individuals of the guppy Poecilia reticulata Peters 1859, molly P. sphenops Valenciennes 1846, and variable platyfish X. variatus Meek 1904 in Brazil (Magalhães, 2006).

Considerada espécie agressiva em relação à ictiofauna nativa nos locais invadidos dos Estados Unidos. Tem causado declínio de espécies nativas nos estados de Nevada, Wyoming e Havaí devido à sua alimentação, que tem como base os ovos de espécies de peixes nativos. (Leão et al. 2011); “The guppy is considered a threat to native cyprinids and killifishes (Sigler and Sigler 1987). For instance, it has adversely affected the White River springfish, Crenichthys baileyi, in a Nevada spring (Deacon et al. 1964). Two subspecies of this springfish are now listed as federally endangered (U.S. Fish and Wildlife Service 1993), and three others are proposed for listing (U.S. Fish and Wildlife Service 1994). The guppy has also been implicated in the decline of the Utah sucker, Catostomus ardens, in a thermal spring in Wyoming (Courtenay et al. 1987). \"