Journal ArticleDOI
Electric and magnetic field detection in elasmobranch fishes
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TLDR
Dogfish and blue sharks were observed to execute apparent feeding responses to dipole electric fields designed to mimic prey, and stingrays showed the ability to orient relative to uniform electric fields similar to those produced by ocean currents.Abstract:
Sharks, skates, and rays receive electrical information about the positions of their prey, the drift of ocean currents, and their magnetic compass headings. At sea, dogfish and blue sharks were observed to execute apparent feeding responses to dipole electric fields designed to mimic prey. In training experiments, stingrays showed the ability to orient relative to uniform electric fields similar to those produced by ocean currents. Voltage gradients of only 5 nanovolts per centimeter would elicit either behavior.read more
Citations
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Journal ArticleDOI
Selective foraging behaviour of basking sharks on zooplankton in a small-scale front
David W. Sims,Victoria A. Quayle +1 more
TL;DR: In this paper, the authors tracked basking sharks and found that they are selective filter-feeders that choose the richest, most profitable plankton patches They forage along thermal fronts and actively select areas that contain high densities of large zooplankton above a threshold density They remain for up to 27 hours in rich patches that are transported by tidal currents.
Book ChapterDOI
Magnetic Orientation in Birds
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Mesopelagic zone ecology and biogeochemistry - a synthesis
Carol V. Robinson,Deborah K. Steinberg,Thomas R. Anderson,Javier Arístegui,Craig A. Carlson,Jessica R. Frost,Jean-François Ghiglione,Santiago Hernández-León,George A. Jackson,Rolf Koppelmann,Bernard Quéguiner,Olivier Ragueneau,Fereidoun Rassoulzadegan,Bruce H. Robison,Christian Tamburini,Tsuneo Tanaka,Karen F. Wishner,Jing Zhang +17 more
TL;DR: G gaps in knowledge are identified and suggestions made for priority research programmes that will improve the ability to predict the effects of climate change on carbon sequestration.
Journal ArticleDOI
Deep pelagic biology
TL;DR: Findings in the deep water column reveal a deep-water fauna that is complex and diverse and still very poorly known, including the role of gelatinous animals in deep pelagic ecology.
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Highly directional swimming by scalloped hammerhead sharks, Sphyrna lewini, and subsurface irradiance, temperature, bathymetry, and geomagnetic field
TL;DR: The homing behavior of scalloped hammerhead sharks to and fro between Espiritu Santo Seamount and Las Animas Island and the surrounding pelagic environment was studied to reveal their mechanisms of navigation in the oceanic environment.
References
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Journal ArticleDOI
The Electric Sense of Sharks and Rays
TL;DR: The experiments described demonstrate clearly that the shark Scyliorhinus canicula and the ray Raja clavata make a biologically significant use of their electrical sensitivity and are justified in accrediting the animals with an electric sense and in designating the ampullae of Lorenzini as electroreceptors.
Journal ArticleDOI
The response of the ampullae of Lorenzini of elasmobranchs to electrical stimulation.
TL;DR: The ampullae of Lorenzini are sensitive to weak tactile stimulation applied to the ends of their jelly-filled tubes, and either an increase or a decrease in their resting discharge frequency may be caused, each with an opposite after-effect.
Journal ArticleDOI
Electro-perception in Sharks and Rays
TL;DR: Partition of the ampullary system makes the head of Scyliorhinus canicula insensitive to weak electrical stimuli in the area where the eliminated ampullae open, and this affects the biological significance of the electro-perception in sharks and rays.
Journal ArticleDOI
Biophysics of geomagnetic field detection
TL;DR: In biology, the study of geomagnetic orientation has gained new momentum since the discovery of magnetic field detectors in aquatic organisms and the ability of sharks and rays to orient to the earth's magnetic field has been demonstrated in behavioral experiments as discussed by the authors.
Journal ArticleDOI
Electrical sensitivity of the ampullae of Lorenzini.
TL;DR: Investigation has shown that the ampullæ of Lorenzini of elasmobranch fishes are sensitive both to slight changes of temperature and to weak mechanical stimuli, but neither sensory modality is convincing as the biologically adequate stimulus.