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Relevant bibliographies by topics / Gnathonemus petersii

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Academic literature on the topic 'Gnathonemus petersii'

Author: Grafiati

Published: 4 June 2021

Last updated: 9 February 2022

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Journal articles on the topic "Gnathonemus petersii"

1

Budelli, R., A. Caputi, L. Gomez, D. Rother, and K. Grant. "The electric image in Gnathonemus petersii." Journal of Physiology-Paris 96, no. 5-6 (September 2002): 421–29. http://dx.doi.org/10.1016/s0928-4257(03)00020-2.

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2

Engelmann, Jacob, Sabine Nöbel, Timo Röver, and Gerhard Emde. "The Schnauzenorgan-response of Gnathonemus petersii." Frontiers in Zoology 6, no. 1 (2009): 21. http://dx.doi.org/10.1186/1742-9994-6-21.

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3

Jung, S. Nicola, Silke Künzel, and Jacob Engelmann. "Spatial learning through active electroreception in Gnathonemus petersii." Animal Behaviour 156 (October 2019): 1–10. http://dx.doi.org/10.1016/j.anbehav.2019.06.029.

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4

von der Emde, Gerhard, and Stephan Schwarz. "Imaging of Objects through active electrolocation in Gnathonemus petersii." Journal of Physiology-Paris 96, no. 5-6 (September 2002): 431–44. http://dx.doi.org/10.1016/s0928-4257(03)00021-4.

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5

Engelmann, J., S. Gertz, J. Goulet, A. Schuh, and G. von der Emde. "Coding of Stimuli by Ampullary Afferents in Gnathonemus petersii." Journal of Neurophysiology 104, no. 4 (October 2010): 1955–68. http://dx.doi.org/10.1152/jn.00503.2009.

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Weakly electric fish use electroreception for both active and passive electrolocation and for electrocommunication. While both active and passive electrolocation systems are prominent in weakly electric Mormyriform fishes, knowledge of their passive electrolocation ability is still scarce. To better estimate the contribution of passive electric sensing to the orientation toward electric stimuli in weakly electric fishes, we investigated frequency tuning applying classical input-output characterization and stimulus reconstruction methods to reveal the encoding capabilities of ampullary receptor afferents. Ampullary receptor afferents were most sensitive (threshold: 40 μV/cm) at low frequencies (<10 Hz) and appear to be tuned to a mix of amplitude and slope of the input signals. The low-frequency tuning was corroborated by behavioral experiments, but behavioral thresholds were one order of magnitude higher. The integration of simultaneously recorded afferents of similar frequency-tuning resulted in strongly enhanced signal-to-noise ratios and increased mutual information rates but did not increase the range of frequencies detectable by the system. Theoretically the neuronal integration of input from receptors experiencing opposite polarities of a stimulus (left and right side of the fish) was shown to enhance encoding of such stimuli, including an increase of bandwidth. Covariance and coherence analysis showed that spiking of ampullary afferents is sufficiently explained by the spike-triggered average, i.e., receptors respond to a single linear feature of the stimulus. Our data support the notion of a division of labor of the active and passive electrosensory systems in weakly electric fishes based on frequency tuning. Future experiments will address the role of central convergence of ampullary input that we expect to lead to higher sensitivity and encoding power of the system.

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Terleph, T. A. "The function of agonistic display behaviours in Gnathonemus petersii." Journal of Fish Biology 64, no. 5 (May 2004): 1373–85. http://dx.doi.org/10.1111/j.0022-1112.2004.00401.x.

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7

von der Emde, G. "Active Electrolocation Helps Gnathonemus petersii to Find Its Prey." Naturwissenschaften 81, no. 8 (August 1, 1994): 367–69. http://dx.doi.org/10.1007/s001140050088.

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8

Laming, P. R., D. J. Rooney, and T. Szabo. "Arousal and epileptogenesis in the electric fish (Gnathonemus petersii)." Comparative Biochemistry and Physiology Part A: Physiology 99, no. 3 (January 1991): 405–9. http://dx.doi.org/10.1016/0300-9629(91)90024-7.

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9

Noe, Angela, and Peter Kunze. "HPLC-Determination of Apomorphine in a Mormyrid Fish, Gnathonemus petersii." Zeitschrift für Naturforschung C 44, no. 11-12 (December 1, 1989): 917–19. http://dx.doi.org/10.1515/znc-1989-11-1207.

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Abstract Uptake of apomorphine and elimination kinetics in brain and muscle tissue of the weakly electric fish Gnathonemus petersii (Mormyridae) was determined by HPLC. 20 min exposure of the fish to apomorphine in the aquarium water (0.4 mg/1) resulted in a concentration factor of 1.09 for brain and 0.55 for muscle tissue. Elimination from brain tissue can be described with first order kinetics (t1/2 = 2.4 h).

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Kunze, Peter, and Hans-Ulrich Wezstein. "Apomorphine and haloperidol influence electric behaviour of a mormyrid fish." Zeitschrift für Naturforschung C 43, no. 1-2 (February 1, 1988): 105–7. http://dx.doi.org/10.1515/znc-1988-1-220.

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The electric behaviour of the mormyrid Gnathonemus petersii is changed by dopaminergic drugs applied to the aquarium water. The upper limit of the interpuis interval distributions is significantly shifted to shorter intervals by apomorphine-HCl (.082-,328 mg/ml), and to longer intervals by haloperidol (.041 -.164 mg/ml). The effect of apomorphine is antagonized by haloperidol. Probably, a dopamin system is involved in the neural control of the electric organ

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Dissertations / Theses on the topic "Gnathonemus petersii"

1

Röver, Timo [Verfasser]. "Die Erkennung von Eigenschaften und Kontrasten virtueller Objekte bei Gnathonemus petersii / Timo Röver." Bonn : Universitäts- und Landesbibliothek Bonn, 2012. http://d-nb.info/1044846690/34.

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2

Jesus, Bacelo Machado Sousa Joao Antonio. "Sensory processing in the Electrosensory Lobe of the weakly electric fish Gnathonemus petersii." Paris 6, 2007. http://www.theses.fr/2007PA066341.

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3

Gertz, Simone [Verfasser]. "Periphere und zentrale Verarbeitung elektrosensorischer Reize beim schwach elektrischen Fisch Gnathonemus petersii / Simone Gertz." Bonn : Universitäts- und Landesbibliothek Bonn, 2013. http://d-nb.info/1044971770/34.

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Amey-Özel, Monique [Verfasser]. "Das Schnauzenorgan des schwach elektrischen Fischs Gnathonemus petersii: Anatomie, neuronale Innervation und senso-motorische Integration / Monique Amey-Özel." Bonn : Universitäts- und Landesbibliothek Bonn, 2019. http://d-nb.info/1188730886/34.

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Schumacher, Sarah [Verfasser]. "From Perception to Cognition: Multisensory object recognition and navigation in the weakly electric fish Gnathonemus petersii / Sarah Schumacher." Bonn : Universitäts- und Landesbibliothek Bonn, 2018. http://d-nb.info/1154485897/34.

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6

Al-Azemi, B. M. "Ultrastructural and morphometric studies on the gills of the freshwater fish Gnathonemus Petersii (family : Mormyridae) exposed to selected pollutants." Thesis, Royal Holloway, University of London, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.525080.

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The histopathological effects of three heavy metals, cyanide and atrazine on the gill tissues of the mormyrid fish, Gnathonemus petersii, were determined primarily by electron microscopy. Replicate samples of fish were exposed for 6 hours to acute and subacute concentrations of each toxicant in a continuous flow system comprising aerated, dechlorinated and heated water. Specific alterations to gill ultrastructure were found to be associated with each toxicant. Cadmium damage at 1.0 mg 1.1 was associated with the formation of large subepithelial spaces within the secondary lamellae and at 10.0 mg 1,1 with lamellar aneurism. Chromium caused epithelial hyperplasia at 1.0 mg 1'1 and extensive fusion of secondary lamellae at 10.0 mg 1'1. Copper exposure stimulated hyperactivity of mucous cells at 0.1 mg 1'1 which resulted in the accumulation of a thick layer of mucus on the gills at 0.5 mg 1,1. Cyanide caused desquamation of filamental epithelium at 0.05 mg 1'1 and stripping of the epithelium and underlying tissue down to the supporting cartilage at 0.1 mg 1'1. Atrazine damage was characterized by the presence of breaks in the gill epithelium at 0.5 mg 1,1 which developed into deep pits at 5.0 mg 1'1. Morphometric measurements of the structural components of secondary lamellae revealed quantitative differences in tissue alterations among fish exposed to different toxicants. A significant increase in the volume of secondary lamellae has been found in fish exposed to heavy metals. On the other hand, fish exposed to atrazine and 0.1 mg 1,1 cyanide showed a sharp decrease in lamellar volume. The increase in lamellar volume in fish exposed to heavy metals was also accompanied by a reduction in the interlamellar water spaces and a significant increase in the water-blood diffusion distance. In cadmium-exposed fish the increase in lamellar volume was mainly attributed to the increase in the subepithelial spaces at 1.0 mg 1'1 or in the volume of blood components due to aneurism at 10.0 mg 1'1. In'fish exposed to chromium it was attributed to the thickening of the epithelial layer as a result of epithelial hyperplasia; or epithelial hypertrophy in copper-exposed fish. On the other hand, the decrease in lamellar volume in fish exposed to 0.10 mg 1'1 cyanide was mainly attributed to the decrease in the volume of the tissue-occupied region outside the basement membrane due to the stripping of lamellar epithelium. In both concentrations ofatrazine (O.S and S.O mg 1'1) the different components of the secondary lamella contributed to the decrease in lamellar volume. These morphometric analyses confirm observations made by electron microscopy. The present study, therefore, demonstrates the potential of electron microscopy, in particular SEM, as a tool for detecting pollutant-induced damage to the surface of fish gills. Preliminary work with chromium has indicated that comparative ultrastructural studies are now needed to further our understanding of the chronic exposure of fish to these toxic chemicals.

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Clausse, Sylvie. "Comparaison du centre initiateur de la commande motrice de la decharge electrique chez deux especes de poissons, par une etude morpho-fonctionnelle." Paris 6, 1986. http://www.theses.fr/1986PA066548.

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Comparaison de la commande centrale de la decharge electrique, de frequence irreguliere, de gnathonemus petersii avec celle de la decharge, de frequence reguliere, d'eigenmannia. Des techniques d'electrophysiologie, de marquage intracellulaire, de microscopie optique et electronique et d'immunohistochimie ont ete associees

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8

Haverkate, Dorothee [Verfasser]. "The grouped retina of Gnathonemus petersii : a behavioural and electrophysiological study / vorgelegt von Dorothee Haverkate." 2009. http://d-nb.info/997323019/34.

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9

Hollmann, Michael [Verfasser]. "Die elektrorezeptiven Foveae von Gnathonemus petersii : die elektrorezeptiven Foveae von Rezeptorverteilung, Rezeptormorphologie und Futtersuchverhalten / vorgelegt von Michael Hollmann." 2008. http://d-nb.info/989802434/34.

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10

Goenechea, Lander [Verfasser]. "Antworten einzelner Neurone im elektrosensorischen Seitenlinienlobus und im Nukleus lateralis von Gnathonemus petersii bei einfachen und komplexen elektrosensorischen Reizen / vorgelegt von Lander Goenechea." 2002. http://d-nb.info/966559657/34.

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Books on the topic "Gnathonemus petersii"

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Boyer, Frédéric, and Vincent Lebastard. Electric sensing for underwater navigation. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780199674923.003.0019.

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Underwater navigation in turbid water for exploration in catastrophic conditions or navigation in confined unstructured environments is still a challenge for robotics. In these conditions, neither vision nor sonar can be used. Pursuing a bio-inspired approach in robotics, one can seek solutions in nature to solve this difficult problem. Several hundred fish species in families Gymnotidae and Mormyridae have developed an original sense well adapted to this situation: the electric sense. Gnathonemus petersii first polarizes its body with respect to an electric organ discharge located at the base of its tail and generates a dipolar electric field in its near surroundings. Then, using many transcutaneous electro-receptors distributed along its body, the fish “measures” the distortion of the electric field and infers an image of its surroundings. Understanding and implementing this bio-inspired sense offers the opportunity to enhance the navigation abilities of our underwater robots in confined spaces bathed by turbid waters.

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Book chapters on the topic "Gnathonemus petersii"

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Rooney, D. J., and T. Szabo. "Secondary Olfactory Projections in Gnathonemus petersii(Mormyridae): A Comparative Perspective." In The Forebrain in Nonmammals, 1–15. Berlin, Heidelberg: Springer Berlin Heidelberg, 1990. http://dx.doi.org/10.1007/978-3-642-75367-1_1.

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