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Gnathonemus petersii (Gunther, 1862)
ELEPHANTNOSE FISH
Life   Vertebrata   Fish   Mormyridae   Gnathonemus


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Query: SELECT * FROM img WHERE ready=1 and taxon like "Gnathonemus petersii%" and (lifeform != "specimen_tag" OR lifeform != "Animal") ORDER BY taxon

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Gnathonemus petersii
Gnathonemus petersii
Elephantnose Fish
ID: 0091 3183 0935 0102 [detail]
John H. Tashjian
© 2001 California Academy of Sciences

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Common name (e.g. trout)

Genus + Species (e.g. Gadus morhua)

Gnathonemus petersii (Günther , 1862)

Elephantnose fish Upload your photos  and  videos
Pictures | Google image Image of Gnathonemus petersii (Elephantnose fish) Gnathonemus petersii
Picture by Moreau, J.

Classification / Names Common names | Synonyms | Catalog of Fishes ( gen. , sp. ) | ITIS | CoL | WoRMS | Cloffa

Actinopterygii (ray-finned fishes) > Osteoglossiformes (Bony tongues) > Mormyridae (Elephantfishes)
Etymology: Gnathonemus: Greek, gnathos = jaw + Greek, nema = filament (Ref. 45335 ) .  More on author: Günther .

Environment: milieu / climate zone / depth range / distribution range Ecology

Freshwater; demersal; pH range: 6.0 - 8.0; dH range: 5 - 19.   Tropical; 22°C - 28°C (Ref. 1672 )

Distribution Countries | FAO areas | Ecosystems | Occurrences | Point map | Introductions | Faunafri

Africa: Niger to Congo River basins (Ref. 3203 ). Widespread in the Congo basin (Ref. 1878 , 4910 , 11970 , 41580 , 41591 , 106245 , 106290 ). Also reported from the Cuanza in Angola (Ref. 99599 ) and Lake Tanganyika (Ref. 114071 ). Report from Lake Kivu questionable and probably erroneous (Ref. 51936 ).

Size / Weight / Age

Maturity: L m   ?   range ? - ? cm
Max length : 35.0 cm SL male/unsexed; (Ref. 2915 )

Short description Morphology | Morphometrics

Dorsal spines (total): 0; Dorsal soft rays (total): 25-31; Anal spines : 0; Anal soft rays : 32 - 36

Biology     Glossary (e.g. epibenthic)

Occurs close to the bottom where it probes for food with the long snout. Territorial and usually aggressive towards members of its own species. This behavior has been shown to involve electric organ discharge (EOD) activity (Ref. 10011 ). Feeds mostly at night on worms and insects (Ref. 7020 ), probably aided by electro-sensory inputs (Ref. 10011 ). Electroreceptors are distributed over the entire head, the dorsal and ventral regions of the body, but absent from the side and the caudal peduncle where the electric organ is located (Ref. 10011 ). Sex-related EOD characteristics in this species has been demonstrated in the laboratory with freshly imported samples during the breeding season; such EOD dimorphism changed with time in captivity (Ref. 10764; 10766 ). Lead nitrate in water significantly increased EOD rate and selectively altered the EOD waveform of this species (Ref. 10469 ). Dubbed a `hearing specialist' having auditory abilities in the range of 100-2500 Hz, with `best frequencies' between 300 and 600 Hz (Ref. 10830 ). Aquarium keeping: in groups of 5 or more individuals; minimum aquarium size 150 cm; not recommended for home aquariums (Ref. 51539 ).

Life cycle and mating behavior Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae

Main reference Upload your references | References | Coordinator | Collaborators

Gosse, J.-P. , 1984. Mormyridae. p. 63-122. In J. Daget, J.-P. Gosse and D.F.E. Thys van den Audenaerde (eds.) Check-list of the freshwater fishes of Africa (CLOFFA). ORSTOM, Paris and MRAC, Tervuren. Vol. 1. (Ref. 3203 )

IUCN Red List Status (Ref. 120744 )

  Least Concern (LC)  ; Date assessed: 01 May 2009

CITES (Ref. 115941 )

Not Evaluated

CMS (Ref. 116361 )

Not Evaluated

Threat to humans

  Harmless




Human uses

Fisheries: subsistence fisheries; aquarium: commercial FAO(Publication : search ) | FishSource |

More information

Countries
FAO areas
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Ecology
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Common names
Synonyms
Metabolism
Predators
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Reproduction
Maturity
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Fecundity
Eggs
Egg development
Age/Size
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Length-weight
Length-length
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Morphometrics
Morphology
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Stamps, Coins Misc.
Sounds
Ciguatera
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Otoliths
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Tools

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Summary page | Point data | Common names | Photos

Internet sources

Alien/Invasive Species database | Aquatic Commons | BHL | Cloffa | Websites from users | Check FishWatcher | CISTI | Catalog of Fishes ( gen. , sp. ) | DiscoverLife | ECOTOX | Faunafri | Fishtrace | GenBank( genome , nucleotide ) | GloBI | Google Books | Google Scholar | Google | IGFA World Record | MitoFish | Otolith Atlas of Taiwan Fishes | Public aquariums | PubMed | Reef Life Survey | Tree of Life | Wikipedia( Go , Search ) | World Records Freshwater Fishing | Zoological Record

Estimates of some properties based on models

Phylogenetic diversity index (Ref. 82805 ):  PD 50 = 0.5625   [Uniqueness, from 0.5 = low to 2.0 = high]. Bayesian length-weight: a=0.01288 (0.00595 - 0.02787), b=2.84 (2.66 - 3.02), in cm Total Length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245 ). Trophic Level (Ref. 69278 ):  3.1   ±0.34 se; Based on food items. Resilience (Ref. 69278 ):  Medium, minimum population doubling time 1.4 - 4.4 years (Preliminary K or Fecundity.). Vulnerability (Ref. 59153 ):  Moderate vulnerability (38 of 100) . Price category (Ref. 80766 ):   Unknown .

Entered by Luna, Susan M. Modified by Binohlan, Crispina B. Fish Forum
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