Evaluating the impact of handling and logger attachment on foraging parameters and physiology in southern rockhopper penguins

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dc.contributor.authorLudynia, Katrinen_ZA
dc.contributor.authorDehnhard, Ninaen_ZA
dc.contributor.authorPoisbleau, Mauden_ZA
dc.contributor.authorDemongin, Laurenten_ZA
dc.contributor.authorMasello, Juan Fen_ZA
dc.contributor.authorQuillfeldt, Petraen_ZA
dc.date.accessioned2015-11-16T04:10:28Z
dc.date.available2015-11-16T04:10:28Z
dc.date.issued2012en_ZA
dc.description.abstractLogger technology has revolutionised our knowledge of the behaviour and physiology of free-living animals but handling and logger attachments may have negative effects on the behaviour of the animals and their welfare. We studied southern rockhopper penguin ( Eudyptes chrysocome ) females during the guard stage in three consecutive breeding seasons (2008/09−2010/11) to evaluate the effects of handling and logger attachment on foraging trip duration, dive behaviour and physiological parameters. Smaller dive loggers (TDRs) were used in 2010/11 for comparison to larger GPS data loggers used in all three seasons and we included two categories of control birds: handled controls and PIT control birds that were previously marked with passive integrative transponders (PITs), but which had not been handled during this study. Increased foraging trip duration was only observed in GPS birds during 2010/11, the breeding season in which we also found GPS birds foraging further away from the colony and travelling longer distances. Compared to previous breeding seasons, 2010/11 may have been a period with less favourable environmental conditions, which would enhance the impact of logger attachments. A comparison between GPS and TDR birds showed a significant difference in dive depth frequencies with birds carrying larger GPS data loggers diving shallower. Mean and maximum dive depths were similar between GPS and TDR birds. We measured little impact of logger attachments on physiological parameters (corticosterone, protein, triglyceride levels and leucocyte counts). Overall, handling and short-term logger attachments (1-3 days) showed limited impact on the behaviour and physiology of the birds but care must be taken with the size of data loggers on diving seabirds. Increased drag may alter their diving behaviour substantially, thus constraining them in their ability to catch prey. Results obtained in this study indicate that data recorded may also not represent their normal dive behaviour.en_ZA
dc.identifier.apacitationLudynia, K., Dehnhard, N., Poisbleau, M., Demongin, L., Masello, J. F., & Quillfeldt, P. (2012). Evaluating the impact of handling and logger attachment on foraging parameters and physiology in southern rockhopper penguins. <i>PLoS One</i>, http://hdl.handle.net/11427/15010en_ZA
dc.identifier.chicagocitationLudynia, Katrin, Nina Dehnhard, Maud Poisbleau, Laurent Demongin, Juan F Masello, and Petra Quillfeldt "Evaluating the impact of handling and logger attachment on foraging parameters and physiology in southern rockhopper penguins." <i>PLoS One</i> (2012) http://hdl.handle.net/11427/15010en_ZA
dc.identifier.citationLudynia, K., Dehnhard, N., Poisbleau, M., Demongin, L., Masello, J. F., & Quillfeldt, P. (2011). Evaluating the impact of handling and logger attachment on foraging parameters and physiology in southern rockhopper penguins. PloS one, 7(11), e50429-e50429. doi:10.1371/journal.pone.0050429en_ZA
dc.identifier.ris TY - Journal Article AU - Ludynia, Katrin AU - Dehnhard, Nina AU - Poisbleau, Maud AU - Demongin, Laurent AU - Masello, Juan F AU - Quillfeldt, Petra AB - Logger technology has revolutionised our knowledge of the behaviour and physiology of free-living animals but handling and logger attachments may have negative effects on the behaviour of the animals and their welfare. We studied southern rockhopper penguin ( Eudyptes chrysocome ) females during the guard stage in three consecutive breeding seasons (2008/09−2010/11) to evaluate the effects of handling and logger attachment on foraging trip duration, dive behaviour and physiological parameters. Smaller dive loggers (TDRs) were used in 2010/11 for comparison to larger GPS data loggers used in all three seasons and we included two categories of control birds: handled controls and PIT control birds that were previously marked with passive integrative transponders (PITs), but which had not been handled during this study. Increased foraging trip duration was only observed in GPS birds during 2010/11, the breeding season in which we also found GPS birds foraging further away from the colony and travelling longer distances. Compared to previous breeding seasons, 2010/11 may have been a period with less favourable environmental conditions, which would enhance the impact of logger attachments. A comparison between GPS and TDR birds showed a significant difference in dive depth frequencies with birds carrying larger GPS data loggers diving shallower. Mean and maximum dive depths were similar between GPS and TDR birds. We measured little impact of logger attachments on physiological parameters (corticosterone, protein, triglyceride levels and leucocyte counts). Overall, handling and short-term logger attachments (1-3 days) showed limited impact on the behaviour and physiology of the birds but care must be taken with the size of data loggers on diving seabirds. Increased drag may alter their diving behaviour substantially, thus constraining them in their ability to catch prey. Results obtained in this study indicate that data recorded may also not represent their normal dive behaviour. DA - 2012 DB - OpenUCT DO - 10.1371/journal.pone.0050429 DP - University of Cape Town J1 - PLoS One LK - https://open.uct.ac.za PB - University of Cape Town PY - 2012 T1 - Evaluating the impact of handling and logger attachment on foraging parameters and physiology in southern rockhopper penguins TI - Evaluating the impact of handling and logger attachment on foraging parameters and physiology in southern rockhopper penguins UR - http://hdl.handle.net/11427/15010 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/15010
dc.identifier.urihttp://dx.doi.org/10.1371/journal.pone.0050429
dc.identifier.vancouvercitationLudynia K, Dehnhard N, Poisbleau M, Demongin L, Masello JF, Quillfeldt P. Evaluating the impact of handling and logger attachment on foraging parameters and physiology in southern rockhopper penguins. PLoS One. 2012; http://hdl.handle.net/11427/15010.en_ZA
dc.language.isoengen_ZA
dc.publisherPublic Library of Scienceen_ZA
dc.publisher.departmentAnimal Demography Unit (ADU)en_ZA
dc.publisher.facultyFaculty of Scienceen_ZA
dc.publisher.institutionUniversity of Cape Town
dc.rightsThis 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.rights.holder© 2012 Ludynia et alen_ZA
dc.rights.urihttp://creativecommons.org/licenses/by/4.0en_ZA
dc.sourcePLoS Oneen_ZA
dc.source.urihttp://journals.plos.org/plosoneen_ZA
dc.subject.otherForagingen_ZA
dc.subject.otherBird physiologyen_ZA
dc.subject.otherPenguinsen_ZA
dc.subject.otherWhite blood cellsen_ZA
dc.subject.otherPhysiological parametersen_ZA
dc.subject.otherAnimal behavioren_ZA
dc.subject.otherAnimal sexual behavioren_ZA
dc.titleEvaluating the impact of handling and logger attachment on foraging parameters and physiology in southern rockhopper penguinsen_ZA
dc.typeJournal Articleen_ZA
uct.type.filetypeText
uct.type.filetypeImage
uct.type.publicationResearchen_ZA
uct.type.resourceArticleen_ZA
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