Marcusenius thomasi
Behaviour:
unknown.
Size:
Maximum observed size: 200 mm SL.
Distribution:
A mormyrid from Upper Guinea: Guinea, Liberia and Sierra Leone.
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Mormyridae
Marcusenius thomasi (Boulenger, 1916)
EOL Text
The head, some parts of the body and the end of the dorsal and anal fins are darker in coloration. The whole body is generally brown. Dorsal fin origin behind anal fin origin, dorsal base/anal base rates = 0.5-0.6. LS/body depth ratio = 3.5-4.5. Long caudal peduncle, length/depth ratio = 2.9-5.5.
| 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=5084 |
Habitat and Ecology:
Habitat and Ecology
It is a demersal of 20.0 cm SL.
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/182602 |
Environment:
demersal; freshwater
| License | http://creativecommons.org/licenses/by-nc/3.0/ |
| Rights holder/Author | Tess Cruz, FishBase |
| Source | http://www.fishbase.org/summary/SpeciesSummary.php?id=5084 |
Benthic feeder. Feeds on aquatic invertebrates (Ref. 36297).
| License | http://creativecommons.org/licenses/by-nc/3.0/ |
| Rights holder/Author | Grace Tolentino Pablico, FishBase |
| Source | No source database. |
Electric Organ Discharge:
unknown.
| 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/2140 |
IUCN Red List Assessment:
Red List Category
LC
Least Concern
Red List Criteria
3.1
Year Assessed
2010
Assessor/s
Laly, P.
Reviewer/s
Entsua-Mensah, M., Darwall, W. & Smith, K.
Contributor/s
Wide distribution in Western Africa. No major widespread threats, though is impacted by mining and deforestation in Liberia.
| 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/182602 |
Biology:
Affinities: close to M. mento and M. furcidens.
| License | http://creativecommons.org/licenses/by-nc/3.0/ |
| Rights holder/Author | Tess Cruz, FishBase |
| Source | http://www.fishbase.org/summary/SpeciesSummary.php?id=5084 |
Population:
Population
No available data.
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/182602 |
General Description:
Translated from Bigorne 1990b:
Teeth are bicuspid. Dorsal begins clearly behind origin of anal (dorsal base 50–60% of anal base). Dorsal rays 22–27 and anal rays 37–43. There are 80 to 88 lateral line scales and 12 around the caudal peduncle. Body depth goes into standarnd length 3.4 – 4.3 times. Caudal peduncle is rather spindly: depth into length 2.9–5.5 times.
| License | http://creativecommons.org/licenses/by-nc-sa/3.0/ |
| Rights holder/Author | Sullivan, John P., Bigorne, R., Africhthy |
| Source | http://mormyrids.lifedesks.org/pages/2140 |
Threats:
Major Threats
Mining and deforestation in Liberia threaten this species.
| 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/182602 |