Sierra leone dwarf characin (Ladigesia roloffi) fish species and information / pictures of Sierra leone dwarf characin - Ladigesia roloffi

Sierra leone dwarf characin (Ladigesia roloffi) fish species information

Scientific Name
Ladigesia roloffi

Common Name
Sierra leone dwarf characin

Biology
Anal spines: 3; Anal soft rays: 13 - 14. Small sized fish with incomplete lateral line and naked dorsal part (of about 3 scales wide) from behind the opercle to the adipose fin. Parietal fontanel not closed. Part of paired fins and area above eye are glossy bright red. Non branched rays of dorsal and caudal and the tips of branched rays are black. No humeral spot. Gill rakers on first ceratobranch.

Classification

Classified By
G?ry, 1968
Class
Ray-finned fishes (Actinopterygii)
Order
Characins (Characiformes)
Family
African tetras (Alestidae)

Distribution

Region
Africa
Distribution
Africa: Kasewe in the Gbangbaia basin (small stream systems west of Jong) and Sewa River in Sierra Leone. Reported from the Du River in Liberia (Ref. 13331).
Range
Unknown

Environment

Climate
Tropical
Water Temperature From
22 °C
Water Temperature To
26 °C
Depth From - meters
Unknown m
Depth To - meters
Unknown m
Zone
pelagic
Environment
Freshwater; ; pH range: 6.0 - 7.0; dH range: ? - 10 pelagic
Trophic Level
3.05 s.e. 0.34 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
3.1 cm
Common Length
Unknown cm
Phylogenetic Diversity Index
PD50 = 1.0000 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 (10 of 100)
Resilience
High, minimum population doubling time less than 15 months (Preliminary K or Fecundity.)
Threat To Humans
  Harmless
IUCN Red List Status
  Endangered (EN) (B1ab(iii)+2ab(iii))