The ocellate river stingray ( Potamotrygon motoro ) exploits vortices of sediment to bury into the substrate

Autor:	Scott G. Seamone, Douglas A. Syme
Rok vydání:	2021
Předmět:	Potamotrygon Fin Fish fin Sediment Aquatic Science Biology biology.organism_classification Rivers Particle image velocimetry Benthic zone Stingray Animals Skates Fish 14. Life underwater Ocellate river stingray Geomorphology Ecology Evolution Behavior and Systematics Elasmobranchii
Zdroj:	Journal of Fish Biology. 99:1729-1734
ISSN:	1095-8649 0022-1112
DOI:	10.1111/jfb.14833
Popis:	Particle image velocimetry and video analysis were employed to determine the pectoral-fin mechanism used by the stingray Potamotrygon motoro to bury into sand. Rapid oscillations of the body and folding motions of the posterior portion of the pectoral fin suspended sediment beneath the pectoral disc and directed vortices of sediment onto the dorsal surface, where they dissipated and the sediment settled. Body coverage was increased by increased fin displacement and speed and also by the occasional collision of vortices that redirected sediment flow towards the head and tail.
Databáze:	OpenAIRE
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