Mormyrus bernhardi
Behaviour:
EOD of Mormyrus bernhardi is unknown.
Distribution:
Only known from type locality(?), which is presumably the Athi River near Nairobi. See Fishbase for museum records and localities. No records as of July 2012.
Mormyrus bernhardi Pellegrin, 1926
EOL Text
Environment:
demersal; freshwater
| License | http://creativecommons.org/licenses/by-nc/3.0/ |
| Rights holder/Author | Pascualita Sa-a, FishBase |
| Source | http://www.fishbase.org/summary/SpeciesSummary.php?id=10953 |
Electric Organ Discharge:
EOD of Mormyrus bernhardi is 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/2171 |
IUCN Red List Assessment:
Red List Category
DD
Data Deficient
Red List Criteria
3.1
Year Assessed
2006
Assessor/s
Vreven, E.
Reviewer/s
Snoeks, J. (Freshwater Fish Red List Authority) & Darwall, W. (Freshwater Biodiversity Assessment Programme)
Contributor/s
Taxonomic uncertainty. According to Seegers et al. (2004) the validity of its species status is doubtful. Possibly it is a junior synonym of Mormyrus hildebrandti. In the literature the species is known only from its holotype.
| 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/60320 |
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/60320 |
Threats:
Major Threats
Fisheries (after Froese and Pauly 2003).
| 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/60320 |
Data deficient (DD)
| License | http://creativecommons.org/licenses/by-nc/3.0/ |
| Rights holder/Author | Pascualita Sa-a, FishBase |
| Source | http://www.fishbase.org/summary/SpeciesSummary.php?id=10953 |
Conservation Actions:
Conservation Actions
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/60320 |
Mormyrus longirostris:
Mormyrus longirostris, commonly referred as the eastern bottle-nosed mormyrid, is a medium-sized fish species belonging to the elephant-snout fish family Mormyridae. It was originally described by Wilhelm Peters in Monatsberichte der Akad. Wiss. Berlin, 1852.[2]
This species grows to a maximum length of 75 centimetres (30 in) and can weigh up to 10 kilograms (22 lb). The dorsal fin is more than twice the length of the anal fin. The dorsal origin is nearer to the tip of the snout than to the caudal fin base.
Contents
Ecology[edit]
It primarily feeds on weeds and insects, but also on other small invertebrates, such as small fish and fish eggs. They hunt using electricity and can give a mild electric shock to defend itself.
Range and habit[edit]
M. longirostris can be found in abundance across the plains of Africa in freshwater habitats, including the lower and middle Zambezi, lower Sabi and Ludi rivers and in the Luapula-Moero-Bangwelo (Zambian Congo system). It inhabits the Ruvuma and Rufiji rivers in Tanzania, lakes Malawi, Tanganyika and Rukwa and other eastward-flowing rivers in Tanzania.
The species lives in caves and muddy areas with soft bottoms. It hides in weeds and characteristically forms small shoals.
Life history/behavior[edit]
Active mostly at night, it breeds during the summer rainy season, moving upstream in rivers after water has receded, with migrations at irregular intervals. Females carry 10,000–70,000 eggs at a time.
Relationship to humans[edit]
The fish is harvested for food with bait and hook.[3]
Status[edit]
The eastern bottlenose mormyrid is classified as least concern on the IUCN Red List.[1]
References[edit]
- ^ a b R. Bills, A. Getahun, J. Kazembe, B. Marshall & T. Moelants (2010). "Mormyrus longirostris". IUCN Red List of Threatened Species. Version 2013.2. International Union for Conservation of Nature. Retrieved November 30, 2013.
- ^ Günther, Albert (1866). Catalogue of the Fishes in the British Museum 6. London: Taylor and Francis. p. 216. OCLC 6392489.
- ^ Skelton, Paul H. (2001). "Eastern bottlenose / oostelike bottelneus, Mormyrus longirostris Peters, 1852". A Complete Guide to the Freshwater Fishes of Southern Africa. Cape Town: Struik. pp. 95–96. ISBN 9781868726431.
| License | http://creativecommons.org/licenses/by-sa/3.0/ |
| Rights holder/Author | Wikipedia |
| Source | http://en.wikipedia.org/w/index.php?title=Mormyrus_longirostris&oldid=640535467 |
Description générale:
Description originale de Pellegrin, 1926 :
La hauteur du corps est comprise 4 fois 1/3 dans la longueur, sous la caudale, la longueur de la tête à peine 4 fois. Le profil supérieur de la tête descend en une courbe légère. Le museau est à peu près aussi long que haut, sa longueur est continue 1 fois 1/4 dans la région postoculaire de la tête. Il existe un appendice globuleux rudimentaire au menton. La bouche s'ouvre un peu au-dessous du niveau inférieur de l'oeil. Il ya 5 dents tronquées en haut, 7 dents tronquées ou bicuspides en bas. L'oeil est grand, ovalaire, son diamètre horizontal est compris 2 fois dans la longueur du museau, 1 fois ¼ dans l’espace interorbitaire. On compte 95 écailles en ligne longitudinale, 20/25 en ligne transversal, 18/18 entre la dorsale et l’anale, 22 autour de pédicule caudal. La dorsale, près de 4 fois aussi longue que l’anale, débute en avant de l’origine des ventrales et comprend 3 rayons simples et 62 branchus. L’anale a son origine à égale distance de la base des pectorals et de celle de la caudale et est compose de 3 rayons simples et de 16 branchus. La pectorale, arrondie, atteint presque l’origine de la ventral et fait les 2/3 de la longueur de la tête. Le pédicule caudal est 2 fois aussi long que haut et mesure presque la ½ de la longueur de la tête. La caudal, écailleuse, a ses lobes pointus. La coloration est brun olivâtre en dessus, brun jaunâtre avec des reflets argentés en dessous. Les nagoires sont grisâtres. D. 65; A. 19; P. 14; V. 6; Sq. 20 | 95 | 25.
| License | http://creativecommons.org/licenses/by-nc-sa/3.0/ |
| Rights holder/Author | Sullivan, John P., J. Pellegrin, Africhthy |
| Source | http://mormyrids.lifedesks.org/pages/2171 |
Bernhard's elephant-snout fish:
Bernhard's elephant-snout fish (Mormyrus bernhardi) is a species of fish in the Mormyridae family. It is endemic to Kenya.
Sources[edit]
- Vreven, E. 2005. Mormyrus bernhardi. 2006 IUCN Red List of Threatened Species. Downloaded on 4 August 2007.
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