Elephant Fish (Pollimyrus isidori isidori) fish species and information / pictures of Elephant Fish - Pollimyrus isidori isidori

Elephant Fish (Pollimyrus isidori isidori) fish species information

Scientific Name
Pollimyrus isidori isidori

Common Name
Elephant Fish

Biology
Occupies floodplain pools in Sudd. Feeds on mud, vegetable debris and small invertebrates. Affinities: only to P. adspersus, morphologically similar; distinguished through scales on caudal peduncle, dorsal and anal fin rays and body coloration. Generates electric organ discharge of short duration that seems to correlate with aggregative behavior of the species. During the breeding season, males build nests and while patrolling their territory sporadically emit EODs at a mean rate of 18 Hz. Participating females, on the other hand, discharge at a fairly regular rate and this has been shown to play a role in sex recognition during courtship and spawning. Male and female EOD waveforms also differ in the amplitude ratio of the first and third phase. Also produce natural sounds

Classification

Classified By
Valenciennes, 1847
Class
Ray-finned fishes (Actinopterygii)
Order
Bony tongues (Osteoglossiformes)
Family
Elephantfishes (Mormyridae)

Distribution

Region
Africa
Distribution
Africa: Gambia, middle Niger, Volta and Chad basins, coastal rivers of C?te d'Ivoire ; also including the Nile. Also known from the B?nou? and Senegal Rivers.
Range
Unknown

Environment

Climate
Tropical
Water Temperature From
22 °C
Water Temperature To
24 °C
Depth From - meters
Unknown m
Depth To - meters
Unknown m
Zone
demersal
Environment
Freshwater; ; pH range: 6.0 - 8.0; dH range: 5 - 19 demersal; potamodromous
Trophic Level
2.61 s.e. 0.22 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
True

Physical Size and Genetics

Maximum Length
9.0 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
Fisheries: of no interest; aquarium: commercial
Vulnerability
Low vulnerability (12 of 100)
Resilience
High, minimum population doubling time less than 15 months (tm=0.5)
Threat To Humans
Harmless
IUCN Red List Status
Not Evaluated