Aba (Gymnarchus niloticus) fish species and information / pictures of Aba - Gymnarchus niloticus

Aba (Gymnarchus niloticus) fish species information

Scientific Name
Gymnarchus niloticus

Common Name
Aba

Biology
Dorsal spines : 0; Dorsal soft rays : 183-230. Body depth 7.2-10.3 x SL. Head 5.6-6.9 x SL. Snout prominent. Pectorals 1.9-5.0 x head length. Body terminates in thin point. Head without scales. Scales small.

Classification

Classified By
Cuvier, 1829
Class
Ray-finned fishes (Actinopterygii)
Order
Bony tongues (Osteoglossiformes)
Family
Abas (Gymnarchidae)

Distribution

Region
Africa
Distribution
Africa: occurring widely in the Nile, Niger, Volta, Chad, Senegal and Gambia basins and Lake Rudolf.
Range
5°N - 18°N

Environment

Climate
Tropical
Water Temperature From
23 °C
Water Temperature To
28 °C
Depth From - meters
Unknown m
Depth To - meters
Unknown m
Zone
demersal
Environment
Freshwater; ; pH range: 6.5 - 8.0; dH range: 10 - 25 demersal; potamodromous
Trophic Level
3.71 s.e. 0.58 Based on food items.
Occurs in Marine / Salt water
False
Occurs in Brackish water
False
Occurs in Fresh Water
True
Occurs on Reefs
False
Is kept in Aquariums
False

Physical Size and Genetics

Maximum Length
167 cm
Common Length
Unknown cm
Phylogenetic Diversity Index
PD50 = 1.5000 many relatives (e.g. carps) 0.5 - 2.0 few relatives (e.g. lungfishes)

Human Uses and Population

Human Uses
Fisheries: commercial
Vulnerability
High to very high vulnerability (71 of 100)
Resilience
Low, minimum population doubling time 4.5 - 14 years (K=0.12-0.17)
Threat To Humans
Harmless
IUCN Red List Status
Least Concern (LC)