01850nas a2200157 4500008004100000022001400041245016300055210006900218260001100287300001400298490000700312520121300319100002501532700001801557856011701575 2014 eng d a1555-642500aVariation of electric organ discharge in Mormyrus kannume (Mormyridae) from south-western Ethiopia in relation to individual size, sex and reproductive status0 aVariation of electric organ discharge in Mormyrus kannume Mormyr c3/2014 a177 - 1850 v543 a

Five variables of the electric organ discharge (EOD) were studied in 132 freshly caught individuals of Mormyrus kannume from the Gibe and Gojeb rivers (the enclosed Omo-Turkana system) and Baro River (the White Nile system) in south-western Ethiopia, East Africa. Most individuals exhibited the typical biphasic EODs with an initial head-positive phase followed by a head-negative phase exceeding initial one in the relative amplitude. In three repeated samples from the Gibe, stable differences in the discharge variables between females and males were found, while no sex differences were observed in other samples. In three cases, a positive correlation between the individual size and discharge duration was found: in two male subsamples from the Gibe and in a mixed sample of both sexes from the Gojeb. In most samples studied, some males exhibited the outstandingly long EOD duration. At the same time, no relationships between the discharge variables and reproductive status of individuals were found. The possible influence of individual and intra-individual variations on the results of inter-population and interspecific comparisons of the discharge variables in mormyrids are highlighted.

1 aGolubtsov, Alexander1 aOrlov, A., A. uhttp://link.springer.com/10.1134/S0032945214020039http://link.springer.com/content/pdf/10.1134/S003294521402003901785nas a2200169 4500008004100000022001400041245012800055210006900183260001200252300000800264490000900272520122800281100002401509700001401533700001801547856005001565 2014 eng d a1175-532600aDescriptions of three new species of Marcusenius Gill, 1862 (Teleostei: Mormyridae) from South Africa and Mozambique0 aDescriptions of three new species of iMarcuseniusi Gill 1862 Tel c03/2014 a4550 v37803 a

Morphological and genetic studies of mormyrid fishes belonging to the genus Marcusenius from South Africa and Mozambique revealed four species of which three are described as new. Marcusenius pongolensis is widespread throughout the Incomati, Pongola and Kosi river systems, and sparsely represented in the Limpopo River system in South Africa. Marcusenius krameri sp. nov. is endemic to the Limpopo River system, and is the sister taxon of M. caudisquamatus sp. nov. from the Nseleni and Mhlatuze river systems in the KwaZulu-Natal Province of South Africa. The Ruvuma specimens were well differentiated from all southern and eastern African species of Marcusenius, and are therefore recognised as M. lucombesi sp. nov. Phylogenetic analysis of the mitochondrial cytochrome b gene showed that the three new species and M. altisambesi form a monophyletic lineage that is sister to a group containing M. pongolensis and M. macrolepidotus. Marcusenius krameri and M. lucombesi seems to prefer slow flowing reaches of rivers, whereas M. pongolensis and M. caudisquamatus seems to mainly inhabit rapid flowing sections of rivers with a rocky substrate. A key to the southern African species of Marcusenius is provided.

1 aMaake, Pholoshi, A.1 aGon, Ofer1 aSwartz, Ernst uhttps://mormyrids.efishgenomics.com/fr/node/904348nas a2200157 4500008004100000022001400041245015600055210006900211260001200280300001200292490000800304520378200312100002404094700002204118856005004140 2014 eng d a1313-298900aPetrocephalus boboto and Petrocephalus arnegardi, two new species of African electric fish (Osteoglossomorpha, Mormyridae) from the Congo River basin0 aPetrocephalus boboto and Petrocephalus arnegardi two new species c04/2014 a43 - 650 v4003 a

Abstract A specimen of the African weakly electric fish genus Petrocephalus (Osteoglossomorpha, Mormyridae) collected in the Congo River at Yangambi, Orientale Province, Democratic Republic of Congo, is described as a new species. Petrocephalus boboto sp. n. can be distinguished from other Central African species of Petrocephalus by a combination of the following characteristics: three distinct black spots on the body, one at the origin of the pectoral fin, one at the origin of the caudal fin and one below the anterior base of the dorsal fin; Nakenrosette and Khelrosette electroreceptor clusters distinct on head but Augenrosette cluster reduced in size; 23 branched dorsal rays, 34 branched anal rays, and electric organ discharge waveform triphasic. Petrocephalus boboto sp. n. most closely resembles the holotype of Petrocephalus binotatus but is easily distinguished from it by its smaller mouth. A comparative molecular analysis including 21 other Petrocephalus species shows Petrocephalus boboto sp. n. to be genetically distinctive and to represent a deep lineage in the genus. Two specimens of Petrocephalus collected at Yangambi are morphologically similar and genetically closely related to specimens previously assigned to Petrocephalus binotatus, collected in the northwestern Congo River basin within Odzala-Kokua National Park, Republic of the Congo. This prompts us to formally describe a new species from these collections, Petrocephalus arnegardi sp. n., that, although similar to the holotype of Petrocephalus binotatus, can be distinguished from it by its smaller mouth and shorter interorbital width. Résumé Un spécimen de poissons africains à faible décharge électrique du genre Petrocephalus (Osteoglossomorpha, Mormyridae) collecté dans le fleuve Congo à Yangambi, Province Orientale, République Démocratique du Congo, est décrit comme une nouvelle espèce. Petrocephalus boboto sp. n. peut-être distinguée des autres espèces de Petrocephalus d’Afrique Centrale par la présence de trois distinctes taches noires, l’une à la base des nageoires pectorales, la seconde à la base de la nageoire caudale et la troisième sur chacun des flancs, juste en dessous des premiers rayons de la nageoire dorsale; présence bien visible de deux rosettes électroréceptives sur la tête (Nakenrosette et Khelrosette), la troisième rosette (Augenrosette) est de taille réduite; 23 rayons branchus à la nageoire dorsale et 34 rayons à la nageoire anale; et décharge électrique triphasique. Petrocephalus boboto sp. n. ressemble le plus à l’holotype de Petrocephalus binotatus mais s’en distingue par une bouche nettement plus petite. Une analyse génétique confirme la distinction de Petrocephalus boboto sp. n. parmi un échantillon de 21 espèces. Cette analyse montre également que cette nouvelle espèce représente une lignée distincte de Petrocephalus. Deux autres spécimens de Petrocephalus collectés à Yangambi sont morphologiquement et génétiquement proches de spécimens auparavant identifiés comme appartenant à Petrocephalus binotatus, collectés dans le Parc National d’Odzala-Kokua, bassin du Congo, République du Congo. Ceci nous amène à les décrire comme une nouvelle espèce, Petrocephalus arnegardi sp. n. qui peut-être distinguée de l’holotype de Petrocephalus binotatus par une bouche plus petite et un espace inter-orbitaire plus court.

1 aLavoué, Sébastien1 aSullivan, John, P uhttps://mormyrids.efishgenomics.com/fr/node/700736nas a2200193 4500008004100000245020600041210006900247260001200316300001400328653000900342653001800351653001900369653002000388653001800408100002300426700002200449700002100471856005000492 2014 eng d00aDe novo assembly and characterization of the skeletal muscle and electric organ transcriptomes of the African weakly-electric fish Campylomormyrus compressirostris (Mormyridae, Teleostei)0 aiDe novoi assembly and characterization of the skeletal muscle a c03/2014 an/a - n/a10acSSR10aelectric fish10aelectric organ10askeletal muscle10atranscriptome1 aLamanna, Francesco1 aKirschbaum, Frank1 aTiedemann, Ralph uhttps://mormyrids.efishgenomics.com/fr/node/800618nas a2200145 4500008004100000022001400041245021000055210006900265260001200334300001100346100001800357700002900375700001800404856005000422 2014 eng d a1464-526200aMarked differentiation in a new species of dwarf stonebasher, Pollimyrus cuandoensis sp. nov. (Mormyridae: Teleostei), from a contact zone with two sibling species of the Okavango and Zambezi rivers0 aMarked differentiation in a new species of dwarf stonebasher iPo c12/2013 a1 - 351 aKramer, Bernd1 avan der Bank, F., Herman1 aWink, Michael uhttps://mormyrids.efishgenomics.com/fr/node/6