Aarhus University Seal / Aarhus Universitets segl

Morten Frederiksen

Inferring seabird activity budgets from leg-mounted time-depth recorders

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal articleResearchpeer-review

Standard

Inferring seabird activity budgets from leg-mounted time-depth recorders. / Linnebjerg, J.F.; Huffeldt, N.P.; Falk, Knud; Merkel, F.R.; Mosbech, A.; Frederiksen, Morten.

In: Journal of Ornithology, Vol. 155, No. 1, 2014, p. 301-306.

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal articleResearchpeer-review

Harvard

APA

CBE

MLA

Vancouver

Author

Linnebjerg, J.F. ; Huffeldt, N.P. ; Falk, Knud ; Merkel, F.R. ; Mosbech, A. ; Frederiksen, Morten. / Inferring seabird activity budgets from leg-mounted time-depth recorders. In: Journal of Ornithology. 2014 ; Vol. 155, No. 1. pp. 301-306.

Bibtex

@article{c2a43383bc5344879daace535e200271,
title = "Inferring seabird activity budgets from leg-mounted time-depth recorders",
abstract = "Leg-mounted loggers are increasingly used in seabird activity studies, but few studies have validated the information obtained about bird behaviour with independent data. Using Br{\"u}nnich's Guillemot Uria lomvia as a study species, we show by comparing interpretations of time-depth recorder (TDR) data with visual observations that activity budgets inferred from leg-mounted TDRs provide reliable information on colony attendance, and validate information on flight time by comparing periods interpreted as flight based on TDR data with periods interpreted as flight based on GPS speed information. Yet, special attention is needed because auks resting at sea occasionally withdraw one leg and/or foot into the plumage (leg-in-plumage). During this behaviour, the TDR may be warm and dry, potentially leading to spurious identification of colony visits. In our case study, spurious identification of colony visits would have resulted in mean trip duration being underestimated by a factor of 4, and number of trips being correspondingly overestimated. We therefore urge great care when deriving activity budgets from leg-mounted TDRs, but nonetheless recommend using leg-mounted TDRs to infer activity budgets from diving seabirds, particularly for longer deployments.",
author = "J.F. Linnebjerg and N.P. Huffeldt and Knud Falk and F.R. Merkel and A. Mosbech and Morten Frederiksen",
year = "2014",
doi = "10.1007/s10336-013-1015-7",
language = "English",
volume = "155",
pages = "301--306",
journal = "Journal of Ornithology",
issn = "0021-8375",
publisher = "Springer",
number = "1",

}

RIS

TY - JOUR

T1 - Inferring seabird activity budgets from leg-mounted time-depth recorders

AU - Linnebjerg, J.F.

AU - Huffeldt, N.P.

AU - Falk, Knud

AU - Merkel, F.R.

AU - Mosbech, A.

AU - Frederiksen, Morten

PY - 2014

Y1 - 2014

N2 - Leg-mounted loggers are increasingly used in seabird activity studies, but few studies have validated the information obtained about bird behaviour with independent data. Using Brünnich's Guillemot Uria lomvia as a study species, we show by comparing interpretations of time-depth recorder (TDR) data with visual observations that activity budgets inferred from leg-mounted TDRs provide reliable information on colony attendance, and validate information on flight time by comparing periods interpreted as flight based on TDR data with periods interpreted as flight based on GPS speed information. Yet, special attention is needed because auks resting at sea occasionally withdraw one leg and/or foot into the plumage (leg-in-plumage). During this behaviour, the TDR may be warm and dry, potentially leading to spurious identification of colony visits. In our case study, spurious identification of colony visits would have resulted in mean trip duration being underestimated by a factor of 4, and number of trips being correspondingly overestimated. We therefore urge great care when deriving activity budgets from leg-mounted TDRs, but nonetheless recommend using leg-mounted TDRs to infer activity budgets from diving seabirds, particularly for longer deployments.

AB - Leg-mounted loggers are increasingly used in seabird activity studies, but few studies have validated the information obtained about bird behaviour with independent data. Using Brünnich's Guillemot Uria lomvia as a study species, we show by comparing interpretations of time-depth recorder (TDR) data with visual observations that activity budgets inferred from leg-mounted TDRs provide reliable information on colony attendance, and validate information on flight time by comparing periods interpreted as flight based on TDR data with periods interpreted as flight based on GPS speed information. Yet, special attention is needed because auks resting at sea occasionally withdraw one leg and/or foot into the plumage (leg-in-plumage). During this behaviour, the TDR may be warm and dry, potentially leading to spurious identification of colony visits. In our case study, spurious identification of colony visits would have resulted in mean trip duration being underestimated by a factor of 4, and number of trips being correspondingly overestimated. We therefore urge great care when deriving activity budgets from leg-mounted TDRs, but nonetheless recommend using leg-mounted TDRs to infer activity budgets from diving seabirds, particularly for longer deployments.

UR - http://www.scopus.com/inward/record.url?scp=84891603372&partnerID=8YFLogxK

U2 - 10.1007/s10336-013-1015-7

DO - 10.1007/s10336-013-1015-7

M3 - Journal article

AN - SCOPUS:84891603372

VL - 155

SP - 301

EP - 306

JO - Journal of Ornithology

JF - Journal of Ornithology

SN - 0021-8375

IS - 1

ER -