Poeciliidae
Poeciliidae is a family of fresh-water fish which are live-bearing aquarium fish (they give birth to live young). They belong to the order Cyprinodontiformes, tooth-carps, and include well-known aquarium fish such as the guppy, molly, platy, and swordtail. The original distribution of the family was the southeastern United States to north of Rio de la Plata, Argentina, and central and southern Africa, including Madagascar. However, due to release of aquarium specimens and the widespread use of species of the genera Poecilia and Gambusia for mosquito control, poeciliids can today be found in all tropical and subtropical areas of the world.Among the live-bearing species, differences in the mode and degree of support the female gives the developing larvae occur. Many members of the family Poeciliidae are considered to be lecithotrophic (the mother provisions the oocyte with all the resources it needs prior to fertilization, so the egg is independent of the mother), but others are matrotrophic (literally means "mother feeding": the mother provides the majority of resources to the developing offspring after fertilization).
Poeciliidae
Poeciliidae
Poeciliidae
Poeciliidae
Poeciliidae
Poeciliidae
Poeciliidae
Poeciliidae
No comments:
Post a Comment