Implantation reduces the negative effects of bio-logging devices on birds

White, Craig R., Cassey, Phillip, Schimpf, Natalie G., Halsey, Lewis G., Green, Jonathan A. and Portugal, Steven J. (2013) Implantation reduces the negative effects of bio-logging devices on birds. Journal of Experimental Biology, 216 4: 537-542. doi:10.1242/jeb.076554

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Author White, Craig R.
Cassey, Phillip
Schimpf, Natalie G.
Halsey, Lewis G.
Green, Jonathan A.
Portugal, Steven J.
Title Implantation reduces the negative effects of bio-logging devices on birds
Journal name Journal of Experimental Biology   Check publisher's open access policy
ISSN 0022-0949
Publication date 2013-02
Year available 2012
Sub-type Article (original research)
DOI 10.1242/jeb.076554
Open Access Status File (Publisher version)
Volume 216
Issue 4
Start page 537
End page 542
Total pages 6
Place of publication Cambridge, United Kingdom
Publisher The Company of Biologists
Collection year 2013
Language eng
Abstract Animal-borne logging or telemetry devices are widely used for measurements of physiological and movement data from free-living animals. For such measurements to be relevant, however, it is essential that the devices themselves do not affect the data of interest. A recent meta-analysis reported an overall negative effect of these devices on the birds that bear them, i.e. on nesting productivity, clutch size, nest initiation date, offspring quality, body condition, flying ability, foraging behaviours, energy expenditure and survival rate. Method of attachment (harness, collar, glue, anchor, implant, breast-mounted or tailmount) had no influence on the strength of these effects but anchored and implanted transmitters had the highest reported rates of device-induced mortality. Furthermore, external devices, but not internal devices, caused an increase in ‘device-induced behaviour’ (comfort behaviours such as preening, fluffing and stretching, and unrest activities including unquantifiable ‘active’ behaviours). These findings suggest that, with the exception of device-induced behaviour, external attachment is preferable to implantation. In the present study we undertake a meta-analysis of 183 estimates of device impact from 39 studies of 36 species of bird designed to explicitly compare the effects of externally attached and surgically implanted devices on a range of traits, including condition, energy expenditure and reproduction. In contrast to a previous study, we demonstrate that externally attached devices have a consistent detrimental effect (i.e. negative influences on body condition, reproduction, metabolism and survival), whereas implanted devices have no consistent effect. We also show that the magnitude of the negative effect of externally attached devices decreases with time. We therefore conclude that device implantation is preferable to external attachment, providing that the risk of mortality associated with the anaesthesia and surgery required for implantation can be mitigated. We recommend that studies employing external devices use devices that can be borne for long periods, and, wherever possible, deploy devices in advance of the time period of interest.
Keyword Bio-logging
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes First posted online November 1, 2012

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2013 Collection
School of Biological Sciences Publications
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