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Anzahl der Einträge in dieser Kategorie: 88.

2016

Kramer, Bernd, van der Bank, Herman und Wink, Michael (2016) Marcusenius desertus sp. nov. (Teleostei: Mormyridae), a mormyrid fish from the Namib desert. African Journal of Aquatic Science 41 (1), S. 1-18.

2014

Schmid, Daniela und 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, S. 1703-1734.

Kramer, Bernd, van der Bank, Herman und 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. Zugang zum Volltext eingeschränkt.

2013

Kramer, Bernd und 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), S. 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), S. 105-133. Zugang zum Volltext eingeschränkt.

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), S. 1-19. Zugang zum Volltext eingeschränkt.

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), S. 31-41. Zugang zum Volltext eingeschränkt.

2012

Kramer, Bernd, Bills, Roger, Skelton, Paul und 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), S. 2179-2258.

2011

Kramer, Bernd und 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), S. 2669-2699.

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

2010

Kramer, Bernd und 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), S. 2213-2242.

Machnik, Peter (2010) Allopatrische Differenzierung der Elektrokommunikation der Bulldog-Fische des südlichen Afrika (Marcusenius-macrolepidotus-Komplex, Mormyridae, Teleostei). Dissertation, Universität Regensburg.

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

2008

Machnik, Peter und 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), S. 1969-1977.

Hanika, Susanne und 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, S. 7. Zugang zum Volltext eingeschränkt.

Machnik, Peter und 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), S. 128-131.

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

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

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

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

2007

Kramer, Bernd, Skelton, Paul, Van der Bank, Herman und 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), S. 647-708.

Lamml, Michael und 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), S. 385-399.

Baier, Bernd und 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), S. 115-142.

2006

Werneyer, Martin und 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), S. 1190-1201.

Baier, Bernd, Lamml, Michael und 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), S. 209-214.

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

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

2005

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

Hanika, Susanne und 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), S. 145-166.

Lamml, Michael und 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, S. 51-78.

2004

Kramer, Bernd, Van der Bank, Herman und 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), S. 1-18.

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

2003

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

Kramer, Bernd, Van der Bank, Herman, Flint, Nicolette, Sauer-Gürth, Hedi und 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), S. 47-70.

2002

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

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

2001

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, S. 314-333. ISBN 981-02-4164-X.

2000

Hanika, Susanne und 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), S. 218-228.

Scheffel, Andreas und Kramer, Bernd (2000) Electric Signals in the Social Behavior of Sympatric Elephantfish (Mormyridae, Teleostei) from the Upper Zambezi River. Naturwissenschaften 87 (3), S. 142-147. Zugang zum Volltext eingeschränkt.

Kramer, Bernd und 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, S. 393-413.

1999

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

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

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

1997

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, S. 313-341. Zugang zum Volltext eingeschränkt.

Kramer, Bernd und 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, S. 329-340.

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

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

Hanika, Susanne (1997) Elektrosensorische Beutedetektion beim Afrikanischen Scharfzahnwels Clarias gariepinus (Burchell, 1822; Clariidae, Siluriformes, Teleostei). Dissertation, Universität Regensburg.

1996

Kaunzinger, Ivo und 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), S. 323-330. Zugang zum Volltext eingeschränkt.

Van der Bank, F. Herman und 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), S. 275-290. Zugang zum Volltext eingeschränkt.

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

1995

Kaunzinger, Ivo und 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), S. 2365-2372. Zugang zum Volltext eingeschränkt.

Postner, Martin und 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), S. 783-791.

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

1994

Kramer, Bernd und 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), S. 435-445.

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

1993

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

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

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

1992

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

1991

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

Kramer, Bernd und 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), S. 1-22.

1990

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

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

Kramer, Bernd (1990) Schockierender Sex bei elektrischen Fischen. Naturwissenschaftliche Rundschau 43 (6), S. 266-267. Zugang zum Volltext eingeschränkt.

1989

Bratton, Bradford O. und 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), S. 349-368.

1988

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

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

Bratton, Bradford O. und 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, S. 227-238.

1987

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

Kramer, Bernd und 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), S. 167-174.

Bonn, Udo und 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), S. 339-362.

1986

Kramer, Bernd und 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), S. 679-680.

1985

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

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

1984

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

1981

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

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

1979

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), S. 67-79.

1978

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), S. 61-74.

1976

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

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

Kramer, Bernd (1976) Flight-associated discharge pattern in a weakly electric fish, Gnathonemus petersii (Mormyridae, Teleostei). Behaviour 59 (1-2), S. 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, S. 425-446.

1974

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, S. 203-235.

1973

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

1971

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

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