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Other all-female species include the New Mexico whiptail, desert grassland whiptail lizard, and blue-spotted salamander. The Amazon molly reproduces through gynogenesis. This image shows that the genetic material of the male is not incorporated into the offspring of the female. And the daughter cells produced are copies of the mother cell. [25]
Poecilia sphenops, called the Mexican molly or simply the molly, is a species of poeciliid fish from Central America. It was once understood as a widespread species with numerous local variants ranging from Mexico to Venezuela, but these variants are today considered distinct species belonging to the P. sphenops complex and P. sphenops itself as being native to Mexico, Guatemala, and Honduras.
Though these measurements place them among the smaller mollies, large specimens are sometimes encountered as well: a 72.7 mm SL female and a 51.9 SL male have been reported. [2] These size variations pertain to distinct populations. [3] The fish vary in color as well, [2] even within the same population. [3]
Sailfin mollies produce broods of 10–140 live young, depending on maturity and size, and females may store sperm long after the demise of their relatively short-lived mates. The gestation period for this species is about three to four weeks, depending upon temperature, and a single female may give birth on multiple occasions throughout the ...
Poecilia gillii is a livebearer, meaning that females give birth to live fry. [3] It reproduces continuously year-round, with most juveniles appearing in August. [2]In some poeciliid species, e.g. P. latipinna and Xiphophorus multilineatus, large males court females while small males instead rely on chasing and sneaking up on the females to copulate.
The most commonly kept species are guppies (P. reticulata), mollies (P. sphenops or P. latipinna), and Endler's livebearers . Members of the genus readily hybridize with each other and so most commercially offered fish are hybrids (with guppies having some Endler, and mollies being a mix of common and sailfin mollies).
The male Poecilia caucana grows to a length of 3 cm (1.2 in) while the female can attain 6 cm (2.4 in). Generally silvery in colour, this fish can be identified by the black blotch at the base of the dorsal fin.
A female may normally deliver 6–10 fry, [11] but the number may exceed 100. [2] Larger females produce more young. [7] [8] The fry, which follow the mother for the first few hours, [11] are approximately 6 mm long at birth. [2] The fish reach sexual maturity at the age of 3–4 months. [2]