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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)