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Charalito

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Charalito

Gila topminnow
Conservation status
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Cyprinodontiformes
Family: Poeciliidae
Genus: Poeciliopsis
Species: P. occidentalis
Binomial name
Poeciliopsis occidentalis
(S. F. Baird & Girard, 1853)

The Gila topminnow (Poeciliopsis occidentalis) is a species of fish in the Poeciliidae family. It is found in Mexico and the United States.

Description

The Gila topminnow has an elongated curved body. Males are rarely over 25mm (1in) and they are smaller than females, which can sometimes be 50mm (2in) [1] The belly is often white with darker body above, scales has dark outlines, and has lateral dark band on its side.

Distribution

Gila topminnow once occupied in the Gila River drainage in Arizona, New Mexico, and Mexico. Currently, they are known to be in Gila River drainage in Arizona and Mexico.

Biology

Gila topminnow was once the most common fish found in the Gila River drainage. They are fertilized internally; reproduction season usually is from April to November. The female gives birth from 10-15 young per brood. These young brood will reach maturity from a weeks to several months. Gila topminnow are omnivorous, and eat food such as detritus and amphipod crustaceans; but feed mostly on aquatic insect larvae, especially mosquitos.

Habitat

This species of fish prefers to live in shallow warm water in headwater springs. They can survive in water with temperature ranging from near freezing to near 100 °F (38 °C). They can also live in water with a wide range of pH from 6.6 – 8.9 and salinity from tap water to sea water. [2]

Conservation

Gila topminnow are endangered due to predation and competition from the introduced mosquitofish. Threats are also comes from continued habitat loss due to water development, habitat degradation due to erosion from roads and drought. Gila topminnow from Sharp Spring are currently being held and bred at Dexter National Fish Hatchery & Technology Center at Dexter, New Mexico, for re-introduction to wild habitats.

References

External links

  • - Charalito.
  • IUCN: all species searchpage
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