Results 31 to 40 of about 1,038 (174)

Fish geometry and electric organ discharge determine functional organization of the electrosensory epithelium. [PDF]

PLoS ONE, 2011
Active electroreception in Gymnotus omarorum is a sensory modality that perceives the changes that nearby objects cause in a self generated electric field.
Juan Ignacio Sanguinetti-Scheck, Eduardo Federico Pedraja, Esteban Cilleruelo, Adriana Migliaro, Pedro Aguilera, Angel Ariel Caputi, Ruben Budelli   +6 more
doaj   +1 more source

Winter predatory efficiency and periodicity of the non-native brown bullhead Ameiurus nebulosus. [PDF]

J Fish Biol
Abstract Winter is a challenge for fish in temperate regions as it is likely to create a bottleneck for small‐bodied fish due to starvation. Resource consumption could contribute substantially to the overwinter survival of fish. Nevertheless, fish feeding activity and related impacts at low temperatures are understudied.
Fritsch A, Staněk P, Buřič M, Kouba A, Veselý L, Balzani P.   +5 more
europepmc   +2 more sources

Electroreceptive and mechanoreceptive anatomical specialisations in the epaulette shark (Hemiscyllium ocellatum). [PDF]

PLoS ONE, 2012
The arrangement of the electroreceptive ampullary system and closely related mechanoreceptive lateral line canal system was investigated in the epaulette shark, Hemiscyllium ocellatum. The lateral line canals form an elaborate network across the head and
Marit Winther-Janson, Barbara E Wueringer, Jamie E Seymour   +2 more
doaj   +1 more source

Sensitivity of Planaria to Weak, Patterned Electric Current and the Subsequent Correlative Interactions with Fluctuations in the Intensity of the Magnetic Field of Earth

J, 2020
Some species of fish show highly evolved mechanisms by which they can detect exogenous electric and magnetic fields. The detection of electromagnetic fields has been hypothesized to exist in humans, despite the lack of specialized sensors.
Victoria Hossack, Michael Persinger, Blake Dotta   +2 more
doaj   +1 more source

Plasticity and genetic effects contribute to different axes of neural divergence in a community of mimetic Heliconius butterflies

Journal of Evolutionary Biology, Volume 36, Issue 8, Page 1116-1132, August 2023., 2023
Comparing brain morphology across a Panamanian community of Heliconius butterflies, we find evidence for interspecific variation along two axes: heritable divergence in the size of visual brain components, and plastic differences in mushroom body size, a central component of learning and memory systems.
Laura Hebberecht, J. Benito Wainwright, Charlotte Thompson, Simon Kershenbaum, W. Owen McMillan, Stephen H. Montgomery   +5 more
wiley   +1 more source

Operant conditioning as a tool to assess hearing abilities in sharks

Journal of Fish Biology, Volume 103, Issue 2, Page 411-424, August 2023., 2023
Abstract Sharks (elasmobranchs) are an ancient, diverse group of fishes, representing a basal stage in the evolution of vertebrate hearing. Yet, our understanding of behavioural measures of hearing abilities in sharks is limited. To address this, an operant conditioning paradigm was designed, and scalloped hammerhead Sphyrna lewini and rig (spotted ...
Carolin Nieder, Jimmy Rapson, Kim Holland, Carl Meyer, John Montgomery, Craig Radford   +5 more
wiley   +1 more source

Modeling the Sequential Pattern Variability of the Electromotor Command System of Pulse Electric Fish

Frontiers in Neuroinformatics, 2022
Mormyridae, a family of weakly electric fish, use electric pulses for communication and for extracting information from the environment (active electroreception). The electromotor system controls the timing of pulse generation.
Angel Lareo, Pablo Varona, Francisco B. Rodriguez   +2 more
doaj   +1 more source

Ketamine disrupts locomotion and electrolocation in a novel model of schizophrenia, Gnathonemus petersii fish

Journal of Neuroscience Research, Volume 101, Issue 7, Page 1098-1106, July 2023., 2023
Ketamine elicits hyperlocomotion, reduces the number of electric organ discharges, reduces thigmotaxis and disrupts a relation between behaviour and electric activity of Gnathonemus petersii fish. Abstract The present study aimed to examine a weakly electric fish Gnathonemus petersii (G.
Veronika Langova, Petra Horka, Jan Hubeny, Tomas Novak, Karel Vales, Petr Adamek, Katerina Holubova, Jiri Horacek   +7 more
wiley   +1 more source

A new and improved electric fish finder with resources for printed circuit board fabrication [PDF]

Neotropical Ichthyology, 2019
We describe the circuit design, construction, and operation of a field-portable electric fish finder (an AC-coupled wide-band differential bio-amplifier with loudspeaker output).
Michael A. Haag, Jeffrey C. Lambert, Joseph C. Waddell, William G.R. Crampton   +3 more
doaj   +1 more source

Sensory perception in cetaceans: Part I – Current knowledge about dolphin senses as a representative species

Frontiers in Ecology and Evolution, 2016
A large part of the literature on sensory perception and behavior in dolphins is devoted to its well-developed vocal and echolocation abilities. In this review, we aim to augment current knowledge by examining the literature on dolphins’ entire Merkwelt (
Dorothee eKremers, Aurélie eCélérier, Benoist eSchaal, Sylvie eCampagna, Sylvie eCampagna, Marie eTrabalon, Marie eTrabalon, Martin eBöye, Martine eHausberger, Alban eLemasson   +9 more
doaj   +1 more source