@article {668, title = {Length-weight relationships and condition factors of Mormyridae species in the Niger River: implications for conservation and management}, journal = {Limnology and Freshwater Biology }, volume = {2025}, year = {2025}, month = {Jan-01-2025}, pages = {215-221}, abstract = {

The length-weight relationship and condition factor of the ten most abundant Mormyridae species in the Niger River at Niamey were examined from August to November 2023. The species assessed were\ Mormyrus rume,\ Campylomormyrus tamandua,\ Pollimyrus isidori,\ Brienomyrus niger,\ Hyperopisus bebe, Mormyrus macrophthalmus,\ Mormyrops anguilloides,\ Brevimyrus niger,\ Mormyrops oudoti,\ Cyphomyrus Psittacus, and\ Marcusenius cyprinoides. Analysis of their length-weight relationships revealed \“b\” values ranging from 2.08 to 2.87, suggesting negative allometric growth across all species. Condition factor (k) values varied from 1.22 \± 0.31 for\ H. bebe\ to 10.48 \± 2.83 for\ M. cyprinoides, with no significant differences in average condition factors among the species. These findings highlight the potential vulnerability of Mormyridae species to environmental changes and anthropogenic pressures, emphasizing the need for targeted conservation measures. The results underscore the importance of sustainable fisheries management practices to preserve biodiversity and ensure the long-term productivity of the Niger River ecosystem. The observed negative allometric growth patterns indicate that environmental conditions may be suboptimal for these species, potentially due to factors such as habitat degradation, water quality issues, or overfishing. Addressing these challenges through habitat restoration and regulatory measures could enhance the resilience of fish populations and support sustainable fisheries.

}, keywords = {condition factor, length-weight analysis, Mormyridae, sustainable fisheries management, the Niger River}, issn = {2658-3518}, doi = {10.31951/2658-3518-2025-a-2-215}, url = {https://doi.org/10.31951/2658-3518-2025-a-2-215}, author = {Souley, S.M.N. and Harouna, M. and Ado, M.I. and Youssoufa, I.} } @inbook {633, title = {Exploration du Parc National de l{\textquoteright}Upemba Mission G.F. De Witte, Fascicule 73 Poissons}, booktitle = {Exploration du Parc National de l{\textquoteright}Upemba Mission G.F. De Witte}, volume = {73}, year = {1976}, publisher = {Fondation Pour Favoriser Les Recherches Scientifiques en Afrique}, organization = {Fondation Pour Favoriser Les Recherches Scientifiques en Afrique}, address = {Brussels}, author = {Poll, M.} } @article {620, title = {The Complete Genome Sequences of 38 Species of Elephantfishes (Mormyridae, Osteoglossiformes)}, year = {2022}, month = {Nov-21-2022}, abstract = {

We present the complete genome sequences of 38 species of elephantfishes from 20 genera. Illumina sequencing was performed on genetic material from single wild-caught individuals. The reads were assembled using a de novo method followed by a finishing step. The raw and assembled data is publicly available via Genbank.

}, issn = {2687-7945}, doi = {10.56179/001c.56077}, url = {http://dx.doi.org/10.56179/001c.56077}, author = {Rose Peterson and John P Sullivan and Stacy Pirro} } @article {610, title = {Ost{\'e}ologie des Genres Marcusenius Gill, Hippopotamyrus Pappenheim, Cyphomyrus Myers, Pollimyrus Taverne et Brienomyrus Taverne (Pisces Mormyriformes)}, journal = {Annales du Mus{\'e}e royal de l{\textquoteright}Afrique centrale, Sciences Zoologiques}, volume = {188}, year = {1971}, pages = {144}, url = {https://www.nhbs.com/osteologie-des-genres-marcusenius-gill-hippopotamyrus-pappenheim-cyphomyrus-myers-pollimyrus-taverne-et-brienomyrus-taverne-pisces-mormyriformes-book}, author = {Taverne, L.} } @article {599, title = {The fishes and fisheries of the Ruaha River basin, Tanzania (systematics, ecology, zoogeography, fisheries)}, year = {1967}, pages = {19 pp.}, institution = {East African Freshwater Fisheries Research Organization}, address = {Jinja, Uganda}, author = {Matthes, H.} } @article {584, title = {The Cyphomyrus Myers 1960 (Osteoglossiformes: Mormyridae) of the Lufira Basin (Upper Lualaba: DR Congo): a generic reassignment and the description of a new species}, journal = {Journal of Fish Biology}, year = {2019}, month = {Jul-12-2020}, abstract = {

Within a comparative morphological framework, Hippopotamyrus aelsbroecki, only known from the holotype originating from Lubumbashi, most probably the Lubumbashi River, a left bank subaffluent of the Luapula River, is reallocated to the genus Cyphomyrus. This transfer is motivated by the fact that H. aelsbroecki possesses a rounded or vaulted predorsal profile, an insertion of the dorsal fin far anterior to the level of the insertion of the anal fin, and a compact, laterally compressed and deep body. In addition, a new species of Cyphomyrus is described from the Lufira basin, Cyphomyrus lufirae. Cyphomyrus lufirae was collected in large parts of the Middle Lufira, upstream of the Kyubo Falls and just downstream of these falls in the lower Lufira and its nearby left bank affluent, the Luvilombo River. The new species is distinguished from all its congeners, that is, firstly, from C. aelsbroecki, C. cubangoensis and C. discorhynchus, by a low number of dorsal fin rays, 27-32 (vs. higher, 36 (37), 34 (33-41) an 38 (38-40), respectively) and, secondly, from C. aelsbroecki, C. cubangoensis, and C. discorhynchus by a large prepelvic distance, 41.0\–43.8\% LS (vs. shorter, 39.7\%, 38.9\–39.1\% and 37.0\–41.0\% LS, respectively). The description of yet another new species for the Upemba National Park and the Kundelungu National Park further highlights their importance for fish protection and conservation in the area. Hence, there is an urgent need for the full integration of fish into the management plans of these parks.

}, issn = {0022-1112}, doi = {10.1111/jfb.14237}, url = {https://onlinelibrary.wiley.com/doi/abs/10.1111/jfb.14237https://onlinelibrary.wiley.com/doi/pdf/10.1111/jfb.14237https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111\%2Fjfb.14237https://onlinelibrary.wiley.com/doi/pdf/10.1111/jfb.14237}, author = {Christian Mukweze Mulelenu and B. Katemo Manda and Eva Decru and Auguste Chocha Manda and Emmanuel Vreven} } @article {575, title = {Contribution {\`a} l{\textquoteright}Ichtyologie de l{\textquoteright}Angola}, journal = {Arquivos do Museu Bocage}, volume = {7}, year = {1936}, pages = {45-62}, keywords = {Angola}, author = {Pellegrin, J.} } @article {570, title = {Phylogenetic relationships between eight African species of mormyriform fish (Teleostei, Osteichthyes): resolution of a cryptic species, and reinstatement of Cyphomyrus Myers, 1960}, journal = {Biochemical Systematics and Ecology}, volume = {24}, year = {1996}, pages = {275-290}, chapter = {275}, abstract = {

Phylogenetic relationships between seven elephantfish species from five genera (Mormyridae) that are endemic to southem Africa, and the Nile knifefish of the sister family, Gymnamhidae, were determined using biochemical genetic data, behaviour (the waveforms of the electric organ discharge), morphology, and habitat and food preferences. The results confirmed the existence of an undescribed species of Hippopotamyrus, and that H.ansorgii and H.discorhynchus are not congeners.These distinctions had been suggested by differences in electric organ discharge wavefonns and are here substantiated by morphological and genetic data. We recommend the reinstatement of Cyphomyrus discorhynchus (Peters, 1852). Genetic distance (D, Nei, 1972) values suggest confamilial genera (D average of 1.09 for all species studied, and 0.715 for southern African species), with the exception of the sympatric and congeneric species: H. ansorgii and H. sp. (D=0.423). Phylogenies based on morphological and electrophoretic data are congruent.

}, doi = {10.1016/0305-1978(96)00026-9}, url = {https://www.sciencedirect.com/science/article/pii/0305197896000269?via\%3Dihub}, author = {F. Herman van der Bank and Bernd Kramer} } @book {568, title = {Naturwissenschaftliche Reise nach Mossambique auf Befehl Seiner Majest{\"a}t des K{\"o}nigs Friedrich Wilhelm IV in den Jahren 1842 bis 1848 ausgef{\"u}hrt.}, volume = {Zoologie. IV. Flussfische}, year = {1868}, pages = { i-viii + 1-116, Pls. 1-20.}, publisher = {G. Reimer}, organization = {G. Reimer}, address = {Berlin}, author = {Peters, W.} } @article {561, title = {Electric Organ Discharges of Cyphomyrus petherici (Mormyridae, Osteoglossiformes) from the White Nile Basin}, journal = {Doklady Biological Sciences}, volume = {481}, year = {2018}, month = {Jan-07-2018}, pages = {142 - 145}, abstract = {

The waveform and some characteristics of the electric organ discharges have been studied in 11 individuals of Cyphomyrus petherici, the only representative of the genus in the Nilotic fauna. The discharge is characterized by three to five phases with a prevalence of the second phase in terms of the relative amplitude and a wide variability of the total duration of discharge (from 212 to 558 \μs). The comparison of the discharges of the species under study with those in the congeneric species and representatives of the genus Pollimyrus (which previously encompassed C. petherici) demonstrates a general similarity of the C. petherici discharges with those of Cyphomyrus, but not Pollimyrus. This is in agreement with the correspondence of the discharge characteristics observed in other mormyrids to the phylogenetic position and taxonomic status of the species.

}, issn = {0012-4966}, doi = {10.1134/S0012496618040038}, url = {http://link.springer.com/10.1134/S0012496618040038}, author = {Baron, V. D. and Orlov, A. A. and Alexander Golubtsov} } @article {547, title = {New insights into the molecular phylogeny and taxonomy of mormyrids (Osteoglossiformes, Actinopterygii) in northern East Africa}, journal = {Journal of Zoological Systematics and Evolutionary Research}, year = {2017}, month = {Feb-09-2019}, abstract = {

Based on morphological data and analysis of mitochondrial cytochrome b gene and nuclear (S7 intron 1) DNA sequences, the phylogenetic relationships of all Pollimyrus species known from the Omo-Turkana enclosed basin and Nile system below the Murchison Falls were solved. A mormyrid \“Pollimyrus\” petherici is distantly related to all other studied Pollimyrus species and clusters together with Cyphomyrus species forming with the later a monophyletic group. Moreover, the West African (but not the Congo River) populations of Cyphomyrus psittacus, the type species of the genus, seem to be conspecific to C. petherici. That is, the range of the genus Cyphomyrus is extended toward the Nile and Omo-Turkana basins. This genus belongs to the large clade widely distributed in sub-Saharian Africa and characterized by the presence of a chin appendage. Significance of this character for mormyrid phylogeny is discussed. Two distinct lineages of Pollimyrus occurring sympatrically in the White Nile tributaries and previously reported as the light and dark forms of Pollimyrus isidori together with five other congeneric species studied form a monophyletic group. The light form apparently represents P. isidori distributed in the Nile system downstream of the Murchison Falls and West Africa; the dark-colored form (designated as Pollimyrus \“D\”) represents a distinct phylogenetic lineage inhabiting both the Omo-Turkana and the White Nile basin. Morphological and ecological data suggest that this form may be conspecific to East African Pollimyrus nigricans or most probably represents a new species.

}, doi = {10.1111/jzs.12186}, url = {http://doi.wiley.com/10.1111/jzs.12186}, author = {Levin, Boris A. and Alexander Golubtsov} } @article {465, title = {Marcusenius smithersi sp. nov. and Gnathonemus rhodesianus sp. nov. (Mormyridae) from the Zambezi river system, and Barbus hondeensis sp. nov. (Cyprinidae) from the Pungwe River}, journal = {Occasional Papers of the National Museum of Southern Rhodesia. B, Natural sciences}, volume = {3}, year = {1962}, month = {31 December 1962}, pages = {780{\textendash}784}, chapter = {780}, author = {M{\"a}{\"a}r, A.} } @article {446, title = {Note sur la syst{\'e}matique des poissons Mormyriformes. Le probl{\`e}me des genres Gnathonemus Gill, Marcusenius Gill, Hippopotamyrus Pappenheim, Cyphomyrus Myers et les nouveaux genres Pollimyrus et Brienomyrus}, journal = {Revue de Zoologie et de Botanique Africaines}, volume = {84 (pts 1-2)}, year = {1971}, month = {09/1971}, pages = {99-110}, chapter = {99}, author = {Taverne, L.} } @article {cite-key, title = {Diagnosen von neuen Flussfischen aus Mossambique}, journal = {Bericht {\"u}ber die zur Bekanntmachung geeigneten Verhandlunreuss.Akademie der Wissenschaften zu Berlin}, volume = {1852}, year = {1852}, pages = {273{\textendash}276, 681{\textendash}685}, keywords = {Alestes imberi}, author = {Peters, W.} } @article {cite-key, title = {Descriptions of new fishes from the upper Congo.{\textendash}II}, journal = {Annals and Magazine of Natural History (Series 6)}, volume = {20}, number = {119}, year = {1897}, month = {1 Nov.}, pages = {422-427}, keywords = {Synodontis pleurops}, author = {George A. Boulenger} } @book {902, title = {The fishes of the Nile}, series = {Zoology of Egypt}, year = {1907}, publisher = {Pub. for the Egyptian government by H. Rees, ltd.}, organization = {Pub. for the Egyptian government by H. Rees, ltd.}, address = {London}, doi = {10.5962/bhl.title.51710}, url = {http://www.biodiversitylibrary.org/item/110263$\#$page/1/mode/1up}, author = {George A. Boulenger} } @article {474, title = {Fourth contribution to the ichthyology of Lake Tanganyika.{\textendash}Report on the collection of fishes made by Dr. W. A. Cunnington during the Third Tanganyika Expedition, 1904-1905}, journal = {Transactions of the Zoological Society of London}, volume = {17}, number = {pt. 6, no. 1}, year = {1906}, month = {10/1906}, pages = {537{\textendash}619, Pls. 30{\textendash}41}, author = {George A. Boulenger} } @article {544, title = {Descriptions of three new fishes discovered by the late Mr. J. S. Budgett in the Niger}, journal = {Proceedings of the General Meetings for Scientific Business of the Zoological Society of London 1904}, year = {1904}, month = {06/1904}, pages = {197{\textendash}199, Pl. 7}, chapter = {197}, author = {George A. Boulenger} } @article {cite-key, title = {Additions {\`a} la faune ichthyologique de bassin du Congo. Mat{\'e}riaux pour la faune du Congo.}, journal = {Annales du Musee du Congo (S{\'e}r. Zoology)}, volume = {2}, number = {fasc. 2}, year = {1902}, month = {Mar.}, pages = {19-57, Pls. 7-16}, keywords = {Synodontis smiti}, url = {https://biodiversitylibrary.org/page/56089769}, author = {George A. Boulenger} } @article {608, title = {A revision of the genera and species of fishes of the family Mormyridae}, journal = {Proceedings of the General Meetings for Scientific Business of the Zoological Society of London}, volume = {1898}, number = {Part 4}, year = {1899}, pages = {775-821}, url = {http://www.biodiversitylibrary.org/item/97095$\#$page/919/mode/1up}, author = {George A. Boulenger} } @article {cite-key, title = {Mat{\'e}riaux pour la faune du Congo. Poissons nouveaux du Congo. Premi{\`e}re Partie. Mormyres}, journal = {Annales du Musee du Congo (Ser. Zoology)}, volume = {1}, number = {fasc. 1}, year = {1898}, month = {Nov}, pages = {1-20, Pls. 1-9}, url = {https://biodiversitylibrary.org/page/56098268}, author = {George A. Boulenger} } @inbook {121, title = {Catalogue of the Fresh-Water Fishes of Africa in the British Museum (Natural History)}, booktitle = {Catalogue of the Fresh-Water Fishes of Africa in the British Museum (Natural History)}, volume = {I}, year = {1909}, pages = {29-145}, publisher = {British Museum (Natural History)}, organization = {British Museum (Natural History)}, address = {London}, url = {https://biodiversitylibrary.org/page/37889609}, author = {George A. Boulenger} } @article {515, title = {Two new fishes from Lake Victoria}, journal = {Annals and Magazine of Natural History (Series 10)}, volume = {2}, number = {7}, year = {1928}, month = {07/1928}, pages = {104{\textendash}106}, author = {Norman, J.R.} } @article {476, title = {Contribution {\`a} l{\textquoteright}Ichtyologie de l{\textquoteright}Angola}, journal = {Arquivos do Museu Bocage}, volume = {7}, year = {1936}, pages = {45{\textendash}62}, author = {Pellegrin, J.} } @article {260, title = {Contribution {\`a} la faune ichthyologique du Congo Belge: Collections du Dr. H. Schouteden (1924-1926) et d{\textquoteright}autres r{\'e}colteurs}, journal = {Annales du Mus{\'e}e du Congo Belge (S{\'e}rie 1)}, volume = {3 (fasc. 5)}, year = {1937}, month = {05/1937}, pages = {189{\textendash}294}, author = {David, L. and Poll, M.} } @article {145, title = {The mormyrid genera Hippopotamyrus and Cyphomyrus}, journal = {Stanford Ichthyological Bulletin}, volume = {7}, year = {1960}, month = {10/1960}, pages = {123-125}, chapter = {4}, author = {Myers, G.S.} } @article {308, title = {Descriptions de Mormyridae et de Characidae nouveaux du Congo belge avec une {\'e}tude du genre Stomatorhinus et des genres de Characidae nains africains}, journal = {Revue de Zoologie et de Botanique Africaines}, volume = {39}, number = {1}, year = {1945}, month = {12/1945}, pages = {36{\textendash}77}, author = {Poll, M.} } @article {144, title = {Les Poissons du Stanley-Pool}, journal = {Annales du Mus{\'e}e du Congo belge. C.{\textendash}Zoologie S{\'e}rie I.}, volume = {4}, number = {1}, year = {1939}, month = {12/1939}, pages = {1-60}, chapter = {1}, author = {Poll, M.} } @article {214, title = {An ecological and systematics survey of fishes in the rapids of the Lower Za{\"\i}re or Congo River}, journal = {Bulletin of the Museum of Comparative Zoology}, volume = {147}, number = {6}, year = {1976}, month = {02/1976}, pages = {239{\textendash}317}, url = {http://biodiversitylibrary.org/page/4276443}, author = {Roberts, T.R. and Stewart, D.J.} } @book {213, title = {Contribution {\`a} la Faune Ichthyologique de l{\textquoteright}Angola}, series = {Publica{\c c}{\~o}es Culturais}, number = {75}, year = {1967}, pages = {381}, publisher = {Companhia de Diamantes de Angola (DIAMANG)}, organization = {Companhia de Diamantes de Angola (DIAMANG)}, address = {Lisbon}, keywords = {Angola}, author = {Poll, M.} } @article {181, title = {Le genre Hippopotamyrus (Pisces, Mormyridae) en Afrique de l{\textquoteright}Ouest, avec la description d{\textquoteright}Hippopotamyrus paugyi n. sp.}, journal = {Cybium}, volume = {9}, number = {2}, year = {1985}, pages = {175-192}, author = {L{\'e}v{\^e}que, C. and Bigorne, R.} } @article {534, title = {Fishes collected by the Za{\"\i}re River Expedition, 1974-75}, journal = {Zoological Journal of the Linnean Society}, volume = {66}, number = {205{\textendash}249}, year = {1979}, author = {Banister, Keith E. and Bailey, Roland G.} } @inbook {179, title = {Mormyridae}, booktitle = {Faune des poissons d{\textquoteright}eaux douces et saum{\^a}tres de l{\textquoteright}Afrique de l{\textquoteright}Ouest = The fresh and brackish water fishes of West Africa}, series = {Faune tropicale 28}, year = {1990}, pages = {122-184}, publisher = {ORSTOM, MRAC}, organization = {ORSTOM, MRAC}, address = {Paris, Tervuren (Belgium)}, url = {http://horizon.documentation.ird.fr/exl-doc/pleins_textes/pleins_textes_6/Fau_trop/34060.pdf}, author = {Bigorne, R.}, editor = {L{\'e}v{\^e}que, C. and Paugy, D. and Teugels, G.G.} } @inbook {158, title = {Mormyridae}, booktitle = {Faune des poissons d{\textquoteright}eaux douces et saum{\^a}tres de l{\textquoteright}Afrique de l{\textquoteright}Ouest}, volume = {1}, year = {2003}, pages = {154-222}, publisher = {IRD/MNHN/MRAC}, organization = {IRD/MNHN/MRAC}, url = {http://www.ird.fr/editions/catalogue/ouvrage.php?livre=409}, author = {Bigorne, R.} } @book {159, title = {The Mormyridae and other Osteoglossomorpha (CD-ROM)}, series = {World Biodiversity Database, CD-ROM Series}, volume = {2000}, year = {2000}, publisher = {Springer Verlag, ETI-UNESCO}, organization = {Springer Verlag, ETI-UNESCO}, address = {New York}, issn = {Hyb: 3-540-14811-6}, url = {https://www.amazon.com/Mormyridae-Osteoglossomorpha-Biodiversity-Database-CD-ROM/dp/3540148116}, author = {Harder, W.} } @article {642, title = {The Victoria Falls, a species boundary for the Zambezi Parrotfish, Cyphomyrus discorhynchus (Peters, 1852), and the resurrection of Cyphomyrus cubangoensis (Pellegrin, 1936) (Mormyridae: Teleostei)}, journal = {Journal of Natural History}, volume = {45}, number = {43-44}, year = {2011}, abstract = {

Cyphomyrus discorhynchus occurs in the Zambezi River and in the linked systems of the Kwando and the Okavango. We collected specimens from both above and below the Victoria Falls and recorded Electric Organ Discharges. We found a marked degree of anatomical differentiation among the specimens from the Zambezi delta to the Victoria Falls that represents a subspecific, geographical cline, reflecting the great length (1400 km) and high ecological diversity of that river section (Lower and Middle Zambezi). We confirm that the populations above the Falls (i.e. Upper Zambezi, Kwando and Okavango) are differentiated from those below, possessing fewer dorsal fin rays (a median of 30-31 rather than 33-34). The waveforms of the electric organ discharge pulses have four phases and show geographic variation but were briefer for specimens from below the Falls. We resurrect Cyphomyrus cubangoensis (Pellegrin, 1936) for the Upper Zambezi/Kwando/Okavango system

}, author = {Bernd Kramer and F. Herman van der Bank} } @article {349, title = {A new species of Slender Stonebasher within the Hippopotamyrus ansorgii complex from the Cunene River in southern Africa (Teleostei: Mormyriformes)}, journal = {Journal of Natural History}, volume = {44}, year = {2010}, month = {9/2010}, pages = {2213 - 2242}, issn = {0022-2933}, doi = {10.1080/00222931003764089}, author = {Bernd Kramer and Ernst Swartz} }