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Interacting with wildlife tourism increases activity of white sharks

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Huveneers, C, Watanabe, YY, Payne, NL and Semmens, JM ORCID: 0000-0003-1742-6692 2018 , 'Interacting with wildlife tourism increases activity of white sharks' , Conservation Physiology, vol. 6, no. 1 , pp. 1-10 , doi: 10.1093/conphys/coy019.

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Abstract

Anthropogenic activities are dramatically changing marine ecosystems. Wildlife tourism is one of the fastest growing sectors of the tourism industry and has the potential to modify the natural environment and behaviour of the species it targets. Here, we used a novel method to assess the effects of wildlife tourism on the activity of white sharks (Carcharodon carcharias). High frequency three-axis acceleration loggers were deployed on ten white sharks for a total of ~9 days. A combination of multivariate and univariate analysis revealed that the increased number of strong accelerations and vertical movements when sharks are interacting with cage-diving operators result in an overall dynamic body acceleration (ODBA) ~61% higher compared with other times when sharks are present in the area where cage-diving occurs. Since ODBA is considered a proxy of metabolic rate, interacting with cage-divers is probably more costly than are normal behaviours of white sharks at the Neptune Islands. However, the overall impact of cage-diving might be small if interactions with individual sharks are infrequent. This study suggests wildlife tourism changes the instantaneous activity levels of white sharks, and calls for an understanding of the frequency of shark-tourism interactions to appreciate the net impact of ecotourism on this species’ fitness.

Item Type: Article
Authors/Creators:Huveneers, C and Watanabe, YY and Payne, NL and Semmens, JM
Keywords: accelerometry, Carcharodon carcharias, ecotourism, energy budget, metabolic rate
Journal or Publication Title: Conservation Physiology
Publisher: Oxford University Press
ISSN: 2051-1434
DOI / ID Number: 10.1093/conphys/coy019
Copyright Information:

© The Author(s) 2018. Published by Oxford University Press and the Society for Experimental Biology. Licensed under Creative Commons Attribution 4.0 International (CC BY 4.0) http://creativecommons.org/licenses/by/4.0/

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