Scientific Name
Xiphophorus nigrensis

Common Name
Panuco swordtail

Biology
Inhabits fast-flowing river segments with steep banks and overhanging bank vegetation.

Classification

Classified By

Rosen, 1960

Class

Ray-finned fishes (Actinopterygii)

Order

Live bearers, Killifishes and Rivulines (Cyprinodontiformes)

Family

Poeciliids (Poeciliidae)

Distribution

Region

Central America

Distribution

Central America: Rio Choy of the Rio Panuco basin in San Luis Potosi, Mexico.

Range

Unknown

Environment

Climate

Tropical

Water Temperature From

24 °C

Water Temperature To

25 °C

Depth From - meters

Unknown m

Depth To - meters

Unknown m

Zone

benthopelagic

Environment

Freshwater; ; pH range: ? - 7.5; dH range: ? - 25 benthopelagic

Trophic Level

3.1 s.e. 0.40 Based on size and trophs of closest relatives

Occurs in Marine / Salt water

False

Occurs in Brackish water

False

Occurs in Fresh Water

True

Occurs on Reefs

False

Is kept in Aquariums

True

Physical Size and Genetics

Maximum Length

6.0 cm

Common Length

Unknown cm

Phylogenetic Diversity Index

PD50 = 0.5000 many relatives (e.g. carps) 0.5 - 2.0 few relatives (e.g. lungfishes)

Human Uses and Population

Human Uses

Aquarium: commercial

Vulnerability

Low vulnerability (19 of 100)

Resilience

High, minimum population doubling time less than 15 months (Preliminary K or Fecundity.)

Threat To Humans

Harmless

IUCN Red List Status

Not Evaluated