A float-release package for recovering data-loggers from wild sharks

TitleA float-release package for recovering data-loggers from wild sharks
Publication TypeJournal Article
Year of Publication2016
AuthorsWhitmore B.M, White C.F, Gleiss A.C, Whitney N.M
JournalJournal of Experimental Marine Biology and Ecology
Date Published2016/02
Type of ArticleArticle
ISBN Number0022-0981
Accession NumberWOS:000369212600006
KeywordsAccelerometer; activity patterns; adelie penguins; behavior; habitat use; management; movements; Radio telemetry; rhinoptera-bonasus; strategies; Tag recovery; whale sharks; white sharks

The rapidly expanding use of high-resolution data-loggers to study marine vertebrates presents a wealth of new opportunities for understanding the behavior, physiology, and ecology of these animals in situ. It also presents a number of new logistical challenges, one of the biggest of which is the need to physically recover the tag in order to acquire data, thus, a novel data-logger release and recovery package was designed and tested. This package consisted of a microsphere-resin float, very high frequency (VHF) transmitter, and galvanic timed release (GTR) device which allowed acceleration data logger (ADL) tags to remain on free-living sharks for several days before detaching from the fin. Upon release, tags floated to the surface and were located using a VHF receiver and yagi antenna. This method has been used successfully on blacktip, bull, nurse, and white sharks to produce an overall recovery rate of 95.7% on 47 deployments over periods of 1-111 h and shark displacement distances up to 35 km. This represents a cost-effective method for recovering data-loggers from sharks and large teleosts. (C) 2015 Elsevier B.V. All rights reserved.

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