00461nas a2200109   4500008004100000245009000041210006900131260007900200490000700279100001300286856005200299       1976                        eng d00aExploration du Parc National de l'Upemba Mission G.F. De Witte, Fascicule 73 Poissons0 aExploration du Parc National de lUpemba Mission GF De Witte Fasc  aBrusselsbFondation Pour Favoriser Les Recherches Scientifiques en Afrique0 v731 aPoll, M.  uhttps://mormyrids.efishgenomics.com/fr/node/63301343nas a2200109   4500008004100000245015100041210006900192520086600261100001901127700001501146856007201161       2000                        eng d00aA morphological description of the sagittal otoliths of two mormyrids, Marcusenius macrolepidotus and Petrocephalus catostoma (Family: Mormyridae)0 amorphological description of the sagittal otoliths of two mormyr3 a<p>The morphology of the sagittal otoliths of two South African mormyrid fish, Marcusenius macrolepidotus and Petrocephalus catostoma, were studied to determine possible morphological significance. The sagittae of M. macrolepidotus and P. catostoma are kidney-shaped and oblong, respectively. The ventral margin is slightly indented in the former and slightly flattened in the latter. The sulcus acusticus of both species is archaesulcoid but mesial in M. macrolepidotus and ostio-caudal in P. catostoma. The crista inferior in M. macrolepidotus is ridge-like and well defined posteriorly and anteriorly, whereas in P. catostoma it is clearly defined posteriorly and disappears anteriorly. The otoliths of both species do not have a rostrum, antirostrum or an excisura. The differences in sagittal morphology between the two mormyrid species are distinct.</p>
1 aNicolaai, N.N.1 aJooste, A.  uhttps://www.tandfonline.com/doi/full/10.1080/15627020.2000.1140719100486nas a2200109   4500008004100000245011200041210006900153260007500222300001100297100001600308856005200324       1967                        eng d00aThe fishes and fisheries of the Ruaha River basin, Tanzania (systematics, ecology, zoogeography, fisheries)0 afishes and fisheries of the Ruaha River basin Tanzania systemati  aJinja, UgandabEast African Freshwater Fisheries Research Organization  a19 pp.1 aMatthes, H.  uhttps://mormyrids.efishgenomics.com/fr/node/59902363nas a2200109   4500008004100000245017900041210006900220520188000289100001502169700001802184856005102202       2000                        eng d00aElectrosensory prey detection in the African sharptooth catfish, Clarias gariepinus (Clariidae), of a weakly electric mormyrid fish, the bulldog (Marcusenius macrolepidotus )0 aElectrosensory prey detection in the African sharptooth catfish 3 a<p>During their seasonal runs in the Okavango and other freshwater bodies in southern Africa, the sharptooth catfish, Clarias gariepinus, specialises on the bulldog, Marcusenius macrolepidotus, as its main prey. We examined whether the catfish can locate bulldogs by detecting their pulse-type electric organ discharges (EODs). The electrosensory threshold for single-cycle, monopolar square-wave pulses was exceedingly low (down to 13 &micro;Vp&ndash;p/cm for 4-ms pulses) in trained, food-rewarded sharptooth catfish (n=4), confirming the results of Lissmann and Machin who were, however, unable to identify a biological function. Other stimulus pulse waveforms (single-cycle, monopolar as well as bipolar sine-wave pulses) were also effective stimuli according to their spectral low-frequency energy contents (0&ndash; 30 Hz). Male bulldogs display an EOD pulse approximately 10&times; the duration of female EODs (&asymp;0.5 ms). The C. gariepinus threshold for field-recorded playbacks of a male bulldog EOD (of long duration) was 103 &micro;Vp&ndash;p/cm, whereas the brief female and juvenile EODs were not detected (using intensities of natural EODs). EODs of other mormyrids were detected when either monopolar or of long duration. Signal source amplitude increased linearly with standard length (SL) in bulldogs. Signal reach, as calculated from signal source amplitude and receiver sensitivity, is up to 150 cm for a large male bulldog (SL 27.5 cm), and 83 cm for a male that has just turned sexually mature (SL 12.6 cm). Therefore, most bulldogs eaten by catfish are probably male, in agreement with the size distribution of bulldogs found in catfish stomachs. These results suggest that sharptooth catfish rely heavily on their acute electrical sense during hunting, and an important function for electroreception in an African catfish has been identified.</p>
1 aHanika, S.1 aKramer, Bernd  uhttp://link.springer.com/10.1007/s00265000023200535nam a2200121   4500008004100000245015200041210006900193260002200262300003200284490003000316100001500346856005200361       1868                        eng d00aNaturwissenschaftliche Reise nach Mossambique auf Befehl Seiner Majestät des Königs Friedrich Wilhelm IV in den Jahren 1842 bis 1848 ausgeführt.0 aNaturwissenschaftliche Reise nach Mossambique auf Befehl Seiner   aBerlinbG. Reimer  a i-viii + 1-116, Pls. 1-20.0 vZoologie. IV. Flussfische1 aPeters, W.  uhttps://mormyrids.efishgenomics.com/fr/node/568