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))