Satellite tagging and biopsy sampling of killer whales at Subantarctic Marion Island : effectiveness, immediate reactions and long-term responses

Show simple item record Reisinger, Ryan Rudolf Oosthuizen, Wessel Christiaan Peron, Guillaume Toussaint, Dawn Cory Andrews, Russel D. De Bruyn, P.J. Nico 2015-02-11T06:00:25Z 2015-02-11T06:00:25Z 2014-11
dc.description.abstract Remote tissue biopsy sampling and satellite tagging are becoming widely used in large marine vertebrate studies because they allow the collection of a diverse suite of otherwise difficult-to-obtain data which are critical in understanding the ecology of these species and to their conservation and management. Researchers must carefully consider their methods not only from an animal welfare perspective, but also to ensure the scientific rigour and validity of their results. We report methods for shore-based, remote biopsy sampling and satellite tagging of killer whales Orcinus orca at Subantarctic Marion Island. The performance of these methods is critically assessed using 1) the attachment duration of low-impact minimally percutaneous satellite tags; 2) the immediate behavioural reactions of animals to biopsy sampling and satellite tagging; 3) the effect of researcher experience on biopsy sampling and satellite tagging; and 4) the mid- (1 month) and long- (24 month) term behavioural consequences. To study mid- and long-term behavioural changes we used multievent capturerecapture models that accommodate imperfect detection and individual heterogeneity. We made 72 biopsy sampling attempts (resulting in 32 tissue samples) and 37 satellite tagging attempts (deploying 19 tags). Biopsy sampling success rates were low (43%), but tagging rates were high with improved tag designs (86%). The improved tags remained attached for 26614 days (mean 6 SD). Individuals most often showed no reaction when attempts missed (66%) and a slight reaction–defined as a slight flinch, slight shake, short acceleration, or immediate dive–when hit (54%). Severe immediate reactions were never observed. Hit or miss and age-sex class were important predictors of the reaction, but the method (tag or biopsy) was unimportant. Multievent trap-dependence modelling revealed considerable variation in individual sighting patterns; however, there were no significant mid- or long-term changes following biopsy sampling or tagging. en_ZA
dc.description.librarian hb2015 en_ZA
dc.description.sponsorship National Research Foundation’s (NRF) Thuthuka and South African National Antarctic programmes, the South African Department of Science and Technology through the NRF, the Mohamed bin Zayed Species Conservation Fund (Project number: 10251290) and the International Whaling Commission’s Southern Ocean Research Partnership. en_ZA
dc.description.uri en_ZA
dc.identifier.citation Reisinger RR, Oosthuizen WC, Peron G, Cory Toussaint D, Andrews RD, De Bruyn PJN. (2014) Satellite Tagging and Biopsy Sampling of Killer Whales at Subantarctic Marion Island: Effectiveness, Immediate Reactions and Long-Term Responses. PLoS ONE 9(11): e111835. doi:10.1371/journal.pone.0111835. en_ZA
dc.identifier.issn 1932-6203 (print)
dc.identifier.other 10.1371/journal.pone.0111835
dc.language.iso en en_ZA
dc.publisher Public Library of Science en_ZA
dc.rights © 2014 Reisinger et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. en_ZA
dc.subject Satellite tagging en_ZA
dc.subject Subantarctic Marion Island en_ZA
dc.subject Remote tissue biopsy sampling en_ZA
dc.subject Biopsy sampling en_ZA
dc.subject Killer whales (Orcinus orca) en_ZA
dc.title Satellite tagging and biopsy sampling of killer whales at Subantarctic Marion Island : effectiveness, immediate reactions and long-term responses en_ZA
dc.type Article en_ZA

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