Prey handling using whole-body fluid dynamics in batoids.

摘要: Fluid flow generated by body movements is a foraging tactic that has been exploited many benthic species. In this study, the kinematics and hydrodynamics of prey handling behavior in little skates, Leucoraja erinacea, round stingrays, Urobatis halleri, are compared using particle image velocimetry. Both species use to form tent constrain with pectoral fin edges pressed against substrate. Stingrays then elevate head, which increases volume between substrate generate suction, while maintaining contact Meanwhile, tip rostrum curled upwards create an opening where fluid drawn under body, functionally analogous suction-feeding fishes. Skates also rotate although open rostral sides smaller area weaker generated. However, skates strike rapidly rotated downwards pushing towards potentially stun or uncover prey. Thus, both anterior portion direct handle albeit different ways, may be explained differences morphology. Rostral stiffness insertion onto differ rays corresponds behavioral resulting distinct patterns. The flexible muscular greater stingrays allow more extensive suction stiff cartilaginous lacking used as paddle well clear away sand cover.