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
Size:
Maximum size: 350 mm SL.
| License | http://creativecommons.org/licenses/by-nc-sa/3.0/ |
| Rights holder/Author | Sullivan, John P., Sullivan, John P., Africhthy |
| Source | http://mormyrids.lifedesks.org/pages/2063 |
Statistics of barcoding coverage: Gnathonemus petersii:
Barcode of Life Data Systems (BOLDS) Stats
Public Records: 10
Specimens with Barcodes: 13
Species With Barcodes: 1
Habitat and Ecology:
Habitat and Ecology
Gnathonemus petersii is a demersal species that 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 behaviour has been shown to involve electric organ discharge (EOD) activity (Møller 1995). Feeds mostly at night on worms and insects (Mills and Vevers 1989), probably aided by electro-sensory inputs (Møller 1995). The 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 (Møller 1995). 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 (Landsman 1993, 1995). Lead nitrate in water significantly increased EOD rate and selectively altered the EOD waveform of this species (Prabhakar and Landsman 1994). Dubbed a `hearing specialist' having auditory abilities in the range of 100-2500 Hz, with `best frequencies' between 300 and 600 Hz (McCormick and Popper 1984).
Systems
- Freshwater
| 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 |
IUCN Red List Assessment:
Red List Category
LC
Least Concern
Red List Criteria
3.1
Year Assessed
2010
Assessor/s
Awaïss, A., Lalèyè, P. & Moelants, T.
Reviewer/s
Snoeks, J., Tweddle, D., Getahun, A., Lalèyè, P., Paugy, D., Zaiss, R., Fishar, M.R.A & Brooks, E.
Contributor/s
This species has a wide distribution, with no known major widespread threats. It is therefore listed as Least Concern. It has also been assessed regionally as Least Concern for central and western Africa.
| 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 |
Environment:
demersal; freshwater; pH range: 6.0 - 8.0; dH range: 5 - 19
| 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 |
Population:
Population
No information available.
Population Trend
Unknown
| 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 |
Habitat:
small to large rivers
| License | http://creativecommons.org/licenses/by-nc-sa/3.0/ |
| Rights holder/Author | Sullivan, John P., Sullivan, John P., Africhthy |
| Source | http://mormyrids.lifedesks.org/pages/2063 |
Threats:
Major Threats
None known.
| 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 |
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. Feeds mostly at night on worms and insects, probably aided by electrosensory inputs.
| License | http://creativecommons.org/licenses/by-nc/3.0/ |
| Rights holder/Author | Drina Sta. Iglesia, FishBase |
| Source | No source database. |
Least Concern (LC)
| 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 |