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Article

Schmid, Daniela and Kramer, Bernd (2014) Sexual selection by female choice prevents speciation reversal in a hybridizing trio of mormyrid fish in southern Africa: evidence from playback experiments of electric organ discharges. Behaviour 151.

Kramer, Bernd and van der Bank, Herman and Wink, Michael (2014) Marked 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 rivers. Journal of Natural History 48, 7-8, 429-463.

Kramer, Bernd and Wink, Michael (2013) East–west differentiation in the Marcusenius macrolepidotus species complex in Southern Africa: the description of a new species for the lower Cunene River, Namibia (Teleostei: Mormyridae). Journal of Natural History 47 (35-36), pp. 2327-2362.

Kramer, Bernd (2013) Differentiation in morphology and electrical signalling in four species of para- and sympatric Marcusenius (Teleostei: Mormyridae) from Côte d’Ivoire, West Africa. Marine and Freshwater Behaviour and Physiology 46 (2), pp. 105-133.

Kramer, Bernd (2013) A morphological study on species of African Mormyrus (Teleostei:
Mormyridae) and their electric organ discharges.
African Journal of Aquatic Science 38 (1), pp. 1-19.

Kramer, Bernd (2013) Morphological and electrophysiological field observations on electric freshwater fish of the genus Mormyrops Müller 1843 (Teleostei: Mormyridae) from West and southern Africa. African Journal of Aquatic Science 38 (Sup. 1), pp. 31-41.

Kramer, Bernd and Bills, Roger and Skelton, Paul and Wink, Michael (2012) A critical revision of the churchill snoutfish, genus Petrocephalus Marcusen, 1854 (Actinopterygii: Teleostei: Mormyridae), from southern and eastern Africa, with the recognition of Petrocephalus tanensis, and the description of five new species. Journal of Natural History 46 (35-36), pp. 2179-2258.

Kramer, Bernd and Van der Bank, F. Herman (2011) 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 of Natural History 45 (43-44), pp. 2669-2699.

Machnik, Peter and Kramer, Bernd (2011) Novel electrosensory advertising during diurnal resting period in male snoutfish, Marcusenius altisambesi (Mormyridae, Teleostei). Journal of Ethology 29 (1), pp. 131-142.

Kramer, Bernd and Swartz, Ernst R. (2010) A new species of Slender Stonebasher within the Hippopotamyrus ansorgii complex from the Cunene River in southern Africa (Teleostei: Mormyriformes). Journal of Natural History 44 (35-36), pp. 2213-2242.

Machnik, Peter and Markowski, Bianca and Kramer, Bernd (2010) Intra- versus inter-sexual selection in the dimorphic electric organ discharges of the snoutfish Marcusenius altisambesi (Mormyriformes, Teleostei). Behaviour 147, pp. 677-704.

Machnik, Peter and Kramer, Bernd (2008) Female choice by electric pulse duration: attractiveness of the males' communication signal assessed by female bulldog fish, Marcusenius pongolensis (Mormyridae, Teleostei). The Journal of Experimental Biology (JEB) 211 (12), pp. 1969-1977.

Hanika, Susanne and Kramer, Bernd (2008) Plasticity of electric organ discharge waveform in the South African Bulldog fish, Marcusenius pongolensis: tradeoff between male attractiveness and predator avoidance? Frontiers in Zoology 5, p. 7.

Machnik, Peter and Kramer, Bernd (2008) A male’s playback signal turns female Marcusenius pongolensis receivers on or off depending on his behavioural state. Communicative & Integrative Biology 1 (2), pp. 128-131.

Lamml, Michael and Kramer, Bernd (2008) Sound Production in the Territorial Behaviour of the Churchill Petrocephalus catostoma (Mormyridae, Teleostei) from the Upper Zambezi River. Bioacoustics 18 (2), pp. 151-158.

Kramer, Bernd and Skelton, Paul and Van der Bank, Herman and Wink, Michael (2007) Allopatric differentiation in the Marcusenius macrolepidotus species complex in southern and eastern Africa: the resurrection of M. pongolensis and M. angolensis, and the description of two new species (Mormyridae, Teleostei). Journal of Natural History 41 (9-12), pp. 647-708.

Lamml, Michael and Kramer, Bernd (2007) Allopatric differentiation in the acoustic communication of a weakly electric fish from southern Africa, Marcusenius macrolepidotus (Mormyridae, Teleostei). Behavioral Ecology and Sociobiology 61 (3), pp. 385-399.

Baier, Bernd and Kramer, Bernd (2007) Electric communication during courtship and spawning in two sibling species of dwarf stonebasher from southern Africa, Pollimyrus castelnaui and P. marianne (Mormyridae, Teleostei): evidence for a non species-specific communication code? Behaviour 144 (1), pp. 115-142.

Werneyer, Martin and Kramer, Bernd (2006) Ontogenetic development of electric-organ discharges in a mormyrid fish, the bulldog Marcusenius macrolepidotus (South African form). Journal of Fish Biology 69 (4), pp. 1190-1201.

Baier, Bernd and Lamml, Michael and Kramer, Bernd (2006) Ontogeny of the electric organ discharge in two parapatric species of the dwarf stonebasher, Pollimyrus castelnaui and P. marianne (Mormyridae, Teleostei). Acta Zoologica 87 (3), pp. 209-214.

Lamml, Michael and Kramer, Bernd (2006) Differentiation of courtship songs in parapatric sibling species of dwarf stonebashers from southern Africa (Mormyridae, Teleostei). Behaviour 143 (6), pp. 783-810.

Werneyer, Martin and Kramer, Bernd (2005) Electric signalling and reproductive behaviour in a mormyrid fish, the bulldog Marcusenius macrolepidotus (South African form). Journal of Ethology 23 (2), pp. 113-125.

Hanika, Susanne and Kramer, Bernd (2005) Intra-male variability of its communication signal in the weakly electric fish, Marcusenius macrolepidotus (South African form), and possible functions. Behaviour 142 (2), pp. 145-166.

Lamml, Michael and Kramer, Bernd (2005) Sound production in the reproductive behaviour of the weakly electric fish Pollimyrus marianne Kramer et al. 2003 (Mormyridae, Teleostei). Bioacoustics - the International Journal of Animal Sound and its Recording 15, pp. 51-78.

Kramer, Bernd and Van der Bank, Herman and Wink, Michael (2004) Hippopotamyrus ansorgii species complex in the Upper Zambezi River System with a description of a new species,
H. szaboi (Mormyridae).
Zoologica Scripta 33 (1), pp. 1-18.

Kramer, Bernd (2004) Von der Ethologie zur Verhaltensbiologie; ein Paradigmenwechsel. Praxis der Naturwissenschaften - Biologie in der Schule 53 (6), pp. 42-47.

Paintner, Stephan and Kramer, Bernd (2003) Electrosensory basis for individual recognition in a weakly electric, mormyrid fish, Pollimyrus adspersus (Günther, 1866). Behavioral Ecology and Sociobiology 55 (5), pp. 197-208.

Kramer, Bernd and Van der Bank, Herman and Flint, Nicolette and Sauer-Gürth, Hedi and Wink, Michael (2003) Evidence for Parapatric Speciation in the Mormyrid Fish, Pollimyrus castelnaui (Boulenger, 1911), from the Okavango–Upper Zambezi River Systems: P. marianne sp. nov., Defined by Electric Organ Discharges, Morphology and Genetics. Environmental Biology of Fishes 67 (1), pp. 47-70.

Werneyer, Martin and Kramer, Bernd (2002) Intraspecific agonistic interactions in freely swimming mormyrid fish, Marcusenius macrolepidotus (South African form). Journal of Ethology 20 (2), pp. 107-121.

Kramer, Bernd (2002) Kommunikation mit elektrischen Signalen bei Fischen. Praxis der Naturwissenschaften - Biologie in der Schule 51 (1), pp. 9-15.

Hanika, Susanne and Kramer, Bernd (2000) Electrosensory prey detection in the African sharptooth catfish, Clarias gariepinus (Clariidae), of a weakly electric mormyrid fish, the bulldog (Marcusenius macrolepidotus). Behavioral Ecology and Sociobiology 48 (3), pp. 218-228.

Scheffel, Andreas and Kramer, Bernd (2000) Electric Signals in the Social Behavior of Sympatric Elephantfish (Mormyridae, Teleostei) from the Upper Zambezi River. Naturwissenschaften 87 (3), pp. 142-147.

Kramer, Bernd and Van der Bank, F. Herman (2000) The southern churchill, Petrocephalus wesselsi, a new species of mormyrid from South Africa defined by electric organ discharges, genetics, and morphology. Environmental Biology of Fishes 59, pp. 393-413.

Hanika, Susanne and Kramer, Bernd (1999) Electric Organ Discharges of Mormyrid Fish as a Possible Cue for Predatory Catfish. Naturwissenschaften 86 (6), pp. 286-288.

Kramer, Bernd (1999) Waveform discrimination, phase sensitivity and jamming avoidance in a wave-type electric fish. Journal of Experimental Biology 202 (10), pp. 1387-1398.

Kramer, Bernd (1997) A field study of African elephantfish (Mormyridae, Teleostei): Electric organ discharges in Marcusenius macrolepidotus (Peters, 1852) and Petrocephalus catostoma (Günther, 1866) as related to sex. Journal of African zoology 111, pp. 313-341.

Kramer, Bernd and Postner, Martin (1997) Development of electrical signalling in larvae of the African fish, Pollimyrus adspersus (Mormyridae, Teleostei): the patterns of interdischarge intervals. Journal of Zoology 243, pp. 329-340.

Kramer, Bernd (1997) Electric Organ Discharges and Their Relation to Sex in Mormyrid Fishes. Naturwissenschaften 84 (3), pp. 119-121.

Scheffel, Andreas and Kramer, Bernd (1997) Electrocommunication and social behaviour in Marcusenius
senegalensis (Mormyridae, Teleostei).
Ethology 103, pp. 404-420.

Kaunzinger, Ivo and Kramer, Bernd (1996) Electrosensory phase sensitivity in the weakly electric fish Eigenmannia in the detection of signals similar to its own. Journal of Comparative Physiology A 179 (3), pp. 323-330.

Van der Bank, F. Herman and Kramer, Bernd (1996) Phylogenetic Relationships Between Eight African Species of Mormyriform Fish ('l'eleostei, Osteichthyes): Resolution of a Cryptic Species, and Reinstatement of Cyphomyrus Myers, 1960. Biochemical Systematics and Ecology 24 (4), pp. 275-290.

Kaunzinger, Ivo and Kramer, Bernd (1995) Electrosensory stimulus-intensity thresholds in the weakly electric knifefish Eigenmannia: reduced sensitivity at harmonics of its own organ discharge. The Journal of Experimental Biology 198 (11), pp. 2365-2372.

Postner, Martin and Kramer, Bernd (1995) Electrosensory thresholds in larvae of the weakly electric fish Pollymyrus isidori (Mormyridae, Teleostei) during ontogeny. The Journal of Experimental Biology (JEB) 198 (3), pp. 783-791.

Moller, Peter and Kramer, Bernd and Serrier, Jacques and Ravaille-Veron, Michèle (1995) Thomas Szabo (1924-1993). Brain, Behavior and Evolution 46, pp. 50-60.

Kramer, Bernd and Kuhn, Birgit (1994) Species recognition by the sequence of discharge intervals in weakly electric fishes of the genus Campylomormyrus (Mormyridae, Teleostei). Animal Bahaviour 48 (2), pp. 435-445.

Kramer, Bernd (1994) Communication behavior and sensory mechanisms in weakly electric fishes. Advances in the Study of Behavior 23, pp. 233-270.

Kramer, Bernd (1993) Electrocommunication in weakly electric fishes: review of signals sent and received. Journal of Comparative Physiology A 173, pp. 719-722.

Kramer, Bernd and Teubl, Harald (1993) Spectral Phase Sensitivity in the Communication of a Wave-Type Electric Fish. Naturwissenschaften 80 (12), pp. 575-578.

Kramer, Bernd and Kuhn, Birgit (1993) Electric signaling and impedance matching in a variable environment. Naturwissenschaften 80 (1), pp. 43-46.

Graff, Christian and Kramer, Bernd (1992) Trained Weakly-electric Fishes Pollimyrus isidori and Gnathonemus petersii (Mormyridae, Teleostei)
Discriminate between Waveforms of Electric Pulse Discharges.
Ethology 90, pp. 279-292.

Kramer, Bernd and Kaunzinger, Ivo (1991) Electrosensory Frequency and Intensity Discrimination in the Wave-Type Electric Fish Eigenmannia. Journal of Experimental Biology 161 (1), pp. 43-59.

Kramer, Bernd and Otto, Brunhilde (1991) Waveform Discrimination in the Electric Fish Eigenmannia: Sensitivity for the Phase Differences Between the Spectral Components of a Stimulus Wave. Journal of Experimental Biology 159 (1), pp. 1-22.

Kramer, Bernd (1990) Sexual signals in electric fishes. Trends in Ecology & Evolution 5 (8), pp. 247-250.

Kramer, Bernd (1990) Schockierender Sex bei elektrischen Fischen. Naturwissenschaftliche Rundschau 43 (6), pp. 266-267.

Bratton, Bradford O. and Kramer, Bernd (1989) Patterns of the electric organ discharge during courtship and spawning in the mormyrid fish, Pollimyrus isidori. Behavioral Ecology and Sociobiology 24 (6), pp. 349-368.

Kramer, Bernd (1988) Schwachelektrische Fische: Ausweichreaktionen auf Störsender. Praxis der Naturwissenschaften - Biologie 37 (7), pp. 1-11.

Kramer, Bernd and Otto, Brunhilde (1988) Female discharges are more electrifying: spontaneous preference in the electric fish, Eigenmannia (Gymnotiformes, Teleostei). Behavioral Ecology and Sociobiology 23 (1), pp. 55-60.

Bratton, Bradford O. and Kramer, Bernd (1988) Intraspecific variability of the pulse-type discharges of the African electric fishes, Pollimyrus isidori and Petrocephalus bovei (Mormyridae, Teleostei), and their dependence on water conductivity. Experimental Biology 47, pp. 227-238.

Kramer, Bernd (1987) The Sexually Dimorphic Jamming Avoidance Response in the Electric Fish Eigenmannia (Teleostei, Gymnotiformes). Journal of Experimental Biology 130 (1), pp. 39-62.

Kramer, Bernd and Weymann, Dieter (1987) A microprocessor system for the digital synthesis of pulsed and continuous discharges of electric fish (or animal vocalization S). Behavioural Brain Research 23 (8), pp. 167-174.

Bonn, Udo and Kramer, Bernd (1987) Distribution of Monoamine-Containing Neurons in the Brain of the Weakly Electric Teleost, Eigenmannia lineata (Gymnotiformes: Rhamphichthyidae). Zeitschrift für mikroskopisch-anatomische Forschung 101 (2), pp. 339-362.

Kramer, Bernd and Zupanc, Günther K. H. (1986) Conditioned Discrimination of Electric Waves Differing Only in Form and Harmonic Content in the Electric Fish, Eigenmannia. Naturwissenschaften 73 (11), pp. 679-680.

Kramer, Bernd and Westby, G. W. M. (1985) No sex difference in the waveform of the pulse type electric fish,Gnathonemus petersii (Mormyridae). Experientia 41 (12), pp. 1530-1531.

Kramer, Bernd (1985) Jamming Avoidance in the Electric Fish Eigenmannia: Harmonic Analysis of Sexually Dimorphic Waves. Journal of Experimental Biology 119 (1), pp. 41-69.

Kramer, Bernd (1984) Tranquillizer reduces electric organ discharge frequency in a teleost fish. Naturwissenschaften 71 (2), pp. 99-100.

Kramer, Bernd and Tautz, Jürgen and Markl, Hubert (1981) The EOD Sound Response in Weakly Electric Fish. Journal of Comparative Physiology A 143 (4), pp. 435-441.

Kramer, Bernd (1979) Electric and Motor responses of the Weakly electric fish, Gnathonemus petersii (Mormyridae), to play-back of social signals. Behavioral Ecology and Sociobiology 6 (1), pp. 67-79.

Kramer, Bernd (1978) Spontaneous discharge rhythms and social signalling in the weakly electric fish Pollimyrus isidori (Cuvier et Valenciennes) (Mormyridae, Teleostei). Behavioral Ecology and Sociobiology 4 (1), pp. 61-74.

Kramer, Bernd and Bauer, Richard (1976) Agonistic behaviour and electric signalling in a mormyrid fish, Gnathonemus petersii. Behavioral Ecology and Sociobiology 1 (1), pp. 45-61.

Kramer, Bernd (1976) Electric Signalling during Aggressive Behaviour in Mormyrus rume (Mormyridae, Teleostei). Naturwissenschaften 63, pp. 48-49.

Kramer, Bernd (1976) Flight-associated discharge pattern in a weakly electric fish, Gnathonemus petersii (Mormyridae, Teleostei). Behaviour 59 (1-2), pp. 88-95.

Kramer, Bernd (1976) The Attack Frequency of Gnathonemus petersii towards Electrically Silent (Denervated) and Intact Conspecifics, and towards Another Mormyrid ( Brienomyrus niger). Behavioral Ecology and Sociobiology 1, pp. 425-446.

Kramer, Bernd (1974) Electric Organ Discharge Interaction during Interspecific Agonistic Behaviour in Freely Swimming Mormyrid Fish. A Method to Evaluate Two (or More) Simultaneous Time Series of Events with a Digital Analyser. Journal of Comparative Physiology 93, pp. 203-235.

Kramer, Bernd (1973) Chemische Wirkstoffe im Nestbau-, Sexual- und Kampfverhalten des Sonnenbarsches Lepomis gibbosus (L.) (Centrarchidae, Teleostei). Zeitschrift für Tierpsychologie 32, pp. 353-373.

Kramer, Bernd (1971) Zur hormonalen Steuerung von Verhaltensweisen der Fortpflanzung beim Sonnenbarsch Lepomis gibbosus (L.)(Centrarchidae, Teleostei). Zeitschrift für Tierpsychologie 28, pp. 351-386.

Book Section

Kramer, Bernd (2008) Electric communication and electrolocation. In: Binder, Marc D. and Hirokawa, Nobutaka and Windhorst, Uwe, (eds.) Encyclopedia of Neuroscience. Springer, Berlin, pp. 1038-1045. ISBN 978-3-540-23735-8 (Print), 978-3-540-29678-2 (Online).

Kramer, Bernd (2008) Electric fish. In: Binder, Marc D. and Hirokawa, Nobutaka and Windhorst, Uwe, (eds.) Encyclopedia of Neuroscience. Springer, Berlin, pp. 1045-1050. ISBN 978-3-540-23735-8 (Print), 978-3-540-29678-2 (Online).

Kramer, Bernd (2008) Electric organ discharge. In: Binder, Marc D. and Hirokawa, Nobutaka and Windhorst, Uwe, (eds.) Encyclopedia of Neuroscience. Springer, Berlin, pp. 1050-1056. ISBN 978-3-540-23735-8 (Print), 978-3-540-29678-2 (Online).

Wiltschko, Wolfgang and Kramer, Bernd (2008) Magnetic and electric senses. In: Binder, Marc D. and Hirokawa, Nobutaka and Windhorst, Uwe, (eds.) Encyclopedia of Neuroscience. Springer, pp. 2198-2206. ISBN 978-3-540-23735-8 (Print), 978-3-540-29678-2 (Online).

Scheffel, Andreas and Kramer, Bernd (2006) Intra- and interspecific electrocommunication among sympatric mormyrids in the Upper Zambezi River. In: Ladich, F. and Collin, S. P. and Moller, P. and Kapoor, B. G., (eds.) Communication in Fishes. Science Publishers, Enfield, New Hampshire, USA, pp. 733-751. ISBN 1-57808-328-1; 978-1-57808-406-7.

Kramer, Bernd (2001) Signal analysis in the communication of a weakly electric fish, Eigenmannia virescens (Gymnotiformes). In: Backhaus, Werner, (ed.) Neuronal coding of perceptual systems. Series on Biophysics and Biocybernetics, 9. World Scientific, Singapore, pp. 314-333. ISBN 981-02-4164-X.

Lilly, M. P. and Cooper, Kumarasen B. and Eisenstein, J. P. and Pfeiffer, Loren N. and West, Kenneth W. and Wegscheider, Werner and Bichler, Max (2000) Anisotropic state of two-dimensional electron gas in high Landau levels. In: Kramer, Bernd, (ed.) Advances in Solid State Physics. Advances in Solid State Physics, 40. Springer, Berlin, pp. 65-76. ISBN 978-3-540-41576-3.

Wegscheider, Werner and Rother, Martin and Ertl, Frank and Deutschmann, Rainer A. and Bichler, Max and Abstreiter, Gerhard (2000) Quantum wires as Luttinger liquids: experiment. In: Kramer, Bernd, (ed.) Advances in Solid State Physics. Advances in Solid State Physics, 40. Springer, Berlin, pp. 97-116. ISBN 978-3-540-41576-3.

Kramer, Bernd (1999) Elektrische Kommunikation bei Nilhechten und Messerfischen. In: Gansloßer, Udo, (ed.) Spitzenleistungen. Die unglaublichen Fähigkeiten der Tiere. Filander-Verl., Fürth, pp. 21-48. ISBN 3-930831-20-1 .

Kramer, Bernd and Kirschbaum, Frank and Markl, Hubert (1981) Species specifity of electric organ discharges in a sympatric group of gymnotid fish from Manaus (Amazonas). In: Szabó, T. and Czéh, G., (eds.) Sensory physiology of aquatic lower vertebrates. Advances in physiological sciences, 31. Pergamon Press, Oxford u. a., pp. 195-219. ISBN 0-08-027352-1; 963-05-2756-1.

Book

Kramer, Bernd (1996) Electroreception and communication in fishes. Progress in Zoology, 42. Gustav Fischer, Stuttgart. ISBN 3-437-25038-8.

Kramer, Bernd (1990) Electrocommunication in teleost fishes. Behavior and experiments. Zoophysiology, 29. Springer, Berlin. ISBN 3-540-51927-0; 0-387-51927-0.

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