Gnathonemus petersii (Günther, 1862)
Size:
Maximum size: 350 mm SL.
Habitat:
small to large rivers
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Mormyridae
Gnathonemus petersii (Günther 1862)
EOL Text
Range Description:
This species is known from Nigeria to Central African Republic, and south to Angola and Zambia
Central Africa: Gnathonemus petersii is known from throughout the Congo River basin. In the Lower Guinea region, it is known from the Cross Mungo, Wouri, Lokoundjé, and Lower Sanaga Rivers.
Western Africa: It is found in the Lower Niger, Ogun, Cross basin and This species is known from upper Chari basin.
| License | http://creativecommons.org/licenses/by-nc-sa/3.0/ |
| Rights holder/Author | © International Union for Conservation of Nature and Natural Resources |
| Source | http://www.iucnredlist.org/apps/redlist/details/181553 |
Nematode Infection (general). Parasitic infestations (protozoa, worms, etc.)
| License | http://creativecommons.org/licenses/by-nc/3.0/ |
| Rights holder/Author | Allan Palacio, FishBase |
| Source | http://www.fishbase.org/Diseases/diseasesList.cfm?ID=2085&StockCode=2280 |
Africa: Niger to Congo River basins (Ref. 3203).
| License | http://creativecommons.org/licenses/by-nc/3.0/ |
| Rights holder/Author | Susan M. Luna, FishBase |
| Source | http://www.fishbase.org/summary/SpeciesSummary.php?id=2085 |
Dactylogyrus Gill Flukes Disease. Parasitic infestations (protozoa, worms, etc.)
| License | http://creativecommons.org/licenses/by-nc/3.0/ |
| Rights holder/Author | Allan Palacio, FishBase |
| Source | http://www.fishbase.org/Diseases/diseasesList.cfm?ID=2085&StockCode=2280 |
Distribution:
Among the most widespread mormyrid species. Such a large distribution suggests revisionary work may uncover multiple species. In Lower Guinea found in the Cross, Mungo, Wouri, Lokoundjé, and Lower Sanaga Rivers. Elsewhere widely distributed throughout central Africa from the Niger Delta to the Congo River basin. The holotype is from Old Calabar, at the mouth of the Calabar and Cross Rivers. See FishBase for museum records and localities.
| License | http://creativecommons.org/licenses/by-nc-sa/3.0/ |
| Rights holder/Author | Sullivan, John P., Sullivan, John P., Hopkins, Carl D., Africhthy |
| Source | http://mormyrids.lifedesks.org/pages/2063 |
Bacterial Infections (general). Bacterial diseases
| License | http://creativecommons.org/licenses/by-nc/3.0/ |
| Rights holder/Author | Allan Palacio, FishBase |
| Source | http://www.fishbase.org/Diseases/diseasesList.cfm?ID=2085&StockCode=2280 |
Western and central Africa.
Aeromonosis. Bacterial diseases
| License | http://creativecommons.org/licenses/by-nc/3.0/ |
| Rights holder/Author | Allan Palacio, FishBase |
| Source | http://www.fishbase.org/Diseases/diseasesList.cfm?ID=2085&StockCode=2280 |
Dorsal spines (total): 0; Dorsal soft rays (total): 25 - 31; Analspines: 0; Analsoft rays: 32 - 36
| License | http://creativecommons.org/licenses/by-nc/3.0/ |
| Rights holder/Author | Maria Lourdes D. Palomares, FishBase |
| Source | http://www.fishbase.org/summary/SpeciesSummary.php?id=2085 |
Electric Organ Discharge:
In the laboratory, EODs of G. petersii are often sexually dimorphic, with the male EOD longer in duration than that of the female. The EOD has three phases: an initial head negative phase which is visible only after amplifying the vertical axis of the display, followed by a head-positive then head-negative phase. The duration of the EOD is approximately 300 to 500 µs. The presence of an initial head-negative phase to the waveform is characteristic of an electric organ with electrocytes which have penetrating stalks.
| License | http://creativecommons.org/licenses/by-nc-sa/3.0/ |
| Rights holder/Author | Sullivan, John P., Hopkins, Carl D., Africhthy |
| Source | http://mormyrids.lifedesks.org/pages/2063 |