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Abstract
Examines in Marine Biology & Oceanography
Does a Shark’s Pectoral Fin Lowering Reflect a Human-Oriented Threat Display?
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Open or Close Erich K Ritter1,2*
1Department of Mathematics and Statistics, USA
2Shark Research Institute, Princeton, USA
*Corresponding author: Erich K Ritter, Department of Mathematics and Statistics, Pensacola, USA
Submission: September 03, 2019; Published: June 27, 2019
ISSN : 2578-031XVolume3 Issue1
Abstract
Pectoral fin lowering among sharks has habitually been interpreted as a threat display towards humans. A different form of such lowering, called ‘pectoral burst,’ a quick drop of both pectoral fins into a vertical position for steering and accelerating purposes, is used to question this old threat display assumption, and a new interpretation is given about what lowered pectorals likely reflect.
Keywords: Agonistic display; Human; Hunching; Pectoral fin; Shark; Threat
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