Effects of attached data-logging devices on little penguins (Eudyptula minor)
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Data-logging devices are commonly used to study the foraging behaviour of individual seabirds. Such studies need to examine the potential effects of using devices on instrumented individuals, not only for ethical reasons but also to ensure the validity of data gathered. We studied the effects of two types of device (time-depth recorder and global positioning system) on little penguins (Eudyptula minor) during the 2010 and 2011 breeding season at Oamaru, New Zealand. Mixed-effect models were used to test for effects of devices by comparing changes in body weight, chick growth and breeding performance between instrumented and control individuals. We found no detectable effects of the attached devices on body weight change, hatching success, fledging success, chick growth parameters or adult survival. We conclude that it is possible to attach data-logging devices to adult little penguins for extended periods during the breeding season with minimal impacts.
KeywordsGlobal Position System Breeding Season Breeding Success Peak Mass Deviance Information Criterion
Funding for the project was provided by the Oamaru Blue Penguin Colony. We wish to thank the colony manager, Jason Gaskill, for facilitating funding and for his ongoing support. We also wish to thank the Waitaki Development Board for their support. We thank Robyn Maynard-Williams for her assistance in the field. We thank Georgina Griffiths and the NIWA National Climate Centre for providing information about the August storm.
- Bannasch R, Wilson RP, Culik B (1994) Hydrodynamic aspects of design and attachment of a back-mounted device in penguins. J Exp Biol 194:83–96Google Scholar
- Chiaradia A, Nisbet ICT (2006) Plasticity in parental provisioning and chick growth in little penguins Eudyptula minor in years of high and low breeding success. Ardea 94:257–270Google Scholar
- Croll DA, Jansen JK, Goebel ME, Boveng PL, Bengtson JL (1996) Foraging behavior and reproductive success in chinstrap penguins: the effects of transmitter attachment. J Field Ornithol 67:1–9Google Scholar
- Culik B, Wilson RP (1991) Swimming energetics and performance of instrumented Adélie penguins (Pygoscelis-adeliae). J Exp Biol 158:355–368Google Scholar
- Lovvorn JR, Liggins GA, Borstad MH, Calisal SM, Mikkelsen J (2001) Hydrodynamic drag of diving birds: effects of body size, body shape and feathers at steady speeds. J Exp Biol 204:1547–1557Google Scholar
- Plummer M (2009) JAGS Version 1.0.3 manual. http://ftp.nluug.nl/os/FreeBSD/ports/distfiles/jags/jags_user_manual.pdf. Accessed 8 November 2012
- Plummer M, Best N, Cowles K, Vines K (2006) CODA: convergence diagnosis and output analysis for MCMC. R News 6:7–11Google Scholar
- Vandenabeele SP, Wilson RP, Grogan A (2011) Tags on seabirds: how seriously are instrument-induced behaviours considered? Anim Welf 20:559–571Google Scholar
- Vertigan C, McMahon CR, Andrews-Goff V, Hindell MA (2012) The effect of investigator disturbance on egg laying, chick survival and fledging mass of short-tailed shearwaters (Puffinus tenuirostris) and little penguins (Eudyptula minor). Anim Welf 21:101–111Google Scholar
- Wilson RP, Putz K, Peters G, Culik B, Scolaro JA, Charrassin JB, RopertCoudert Y (1997) Long-term attachment of transmitting and recording devices to penguins and other seabirds. Wildl Soc Bull 25:101–106Google Scholar