Comparison of two sampling protocols and four home-range estimators using radio-tracking data from urban badgers Meles meles

2.50
Hdl Handle:
http://hdl.handle.net/10545/270369
Title:
Comparison of two sampling protocols and four home-range estimators using radio-tracking data from urban badgers Meles meles
Authors:
Huck, Maren ( 0000-0002-7740-3903 ) ; Davison, John; Roper, Timothy J.
Abstract:
Radio-telemetry is often the method of choice for studies of species whose behaviour is difficult to observe directly. However, considerable debate has ensued about the best way of deriving home-range estimates. In recent years, kernel estimators have become the most widely used method, together with the oldest and simplest method, the minimum convex polygon (MCP). More recently, it has been suggested that the local convex hull (LCH) might be more appropriate than kernel methods in cases where an animal’s home range includes a priori inaccessible areas. Yet another method, the Brownian bridge (BB), explicitly uses autocorrelated data to determine movement paths and, ultimately, home ranges or migration routes of animals. Whereas several studies have used simulation techniques to compare these different methods, few have used data from real animals. We used radio-telemetric data from urban badgers Meles meles to compare two sampling protocols (10-minute vs at least 30-minute inter-fix intervals) and four home-range estimators (MCP, fixed kernels (FK), LCH and BB). We used a multi-response permutation procedure and randomisation tests to compare overall patterns of fixes and degree of overlap of home ranges estimated using data from different sampling protocols, and a general linear model to compare the influence of sampling protocols and home-range estimator on the size of habitat patches. The shape of the estimated home ranges was influenced by sampling protocol in some cases. By contrast, the sizes and proportions of different habitats within home ranges were influenced by estimator type but not by sampling protocol. LCH performed consistently better than FK, and is especially appropriate for patchy study areas containing frequent no-go zones. However, we recommend using LCH in combination with other methods to estimate total range size, because LCH tended to produce smaller estimates than any other method. Results relating to BB are preliminary but suggest that this method is unsuitable for species in which range size is small compared to average travel speed.
Affiliation:
University of Sussex
Citation:
Comparison of two sampling protocols and four home-range estimators using radio-tracking data from urban badgers Meles meles 2008, 14 (4):467 Wildlife Biology
Publisher:
Nordic Council for Wildlife Research
Journal:
Wildlife Biology
Issue Date:
2008
URI:
http://hdl.handle.net/10545/270369
DOI:
10.2981/0909-6396-14.4.467
Additional Links:
http://www.bioone.org/doi/abs/10.2981/0909-6396-14.4.467
Type:
Article
ISSN:
0909-6396
Sponsors:
Marie-Curie Intra-European Fellowship (BSSUB - 24007); Defra WSC contract WM0304; Wildlife Biology granted the permit to upload the article to this repository
Appears in Collections:
Biological Sciences Research Group

Full metadata record

DC FieldValue Language
dc.contributor.authorHuck, Marenen
dc.contributor.authorDavison, Johnen
dc.contributor.authorRoper, Timothy J.en
dc.date.accessioned2013-02-25T16:26:08Z-
dc.date.available2013-02-25T16:26:08Z-
dc.date.issued2008-
dc.identifier.citationComparison of two sampling protocols and four home-range estimators using radio-tracking data from urban badgers Meles meles 2008, 14 (4):467 Wildlife Biologyen
dc.identifier.issn0909-6396-
dc.identifier.doi10.2981/0909-6396-14.4.467-
dc.identifier.urihttp://hdl.handle.net/10545/270369-
dc.description.abstractRadio-telemetry is often the method of choice for studies of species whose behaviour is difficult to observe directly. However, considerable debate has ensued about the best way of deriving home-range estimates. In recent years, kernel estimators have become the most widely used method, together with the oldest and simplest method, the minimum convex polygon (MCP). More recently, it has been suggested that the local convex hull (LCH) might be more appropriate than kernel methods in cases where an animal’s home range includes a priori inaccessible areas. Yet another method, the Brownian bridge (BB), explicitly uses autocorrelated data to determine movement paths and, ultimately, home ranges or migration routes of animals. Whereas several studies have used simulation techniques to compare these different methods, few have used data from real animals. We used radio-telemetric data from urban badgers Meles meles to compare two sampling protocols (10-minute vs at least 30-minute inter-fix intervals) and four home-range estimators (MCP, fixed kernels (FK), LCH and BB). We used a multi-response permutation procedure and randomisation tests to compare overall patterns of fixes and degree of overlap of home ranges estimated using data from different sampling protocols, and a general linear model to compare the influence of sampling protocols and home-range estimator on the size of habitat patches. The shape of the estimated home ranges was influenced by sampling protocol in some cases. By contrast, the sizes and proportions of different habitats within home ranges were influenced by estimator type but not by sampling protocol. LCH performed consistently better than FK, and is especially appropriate for patchy study areas containing frequent no-go zones. However, we recommend using LCH in combination with other methods to estimate total range size, because LCH tended to produce smaller estimates than any other method. Results relating to BB are preliminary but suggest that this method is unsuitable for species in which range size is small compared to average travel speed.en
dc.description.sponsorshipMarie-Curie Intra-European Fellowship (BSSUB - 24007); Defra WSC contract WM0304; Wildlife Biology granted the permit to upload the article to this repositoryen
dc.publisherNordic Council for Wildlife Researchen
dc.relation.urlhttp://www.bioone.org/doi/abs/10.2981/0909-6396-14.4.467en
dc.rightsArchived with thanks to Wildlife Biologyen
dc.subjectEurasian badgeren
dc.subjectMeles melesen
dc.subjectMCPen
dc.subjectFixed kernelen
dc.subjectLocal convex hullen
dc.subjectBrownian bridgeen
dc.subjectRadio-telemetryen
dc.titleComparison of two sampling protocols and four home-range estimators using radio-tracking data from urban badgers Meles meles-
dc.typeArticleen
dc.contributor.departmentUniversity of Sussexen
dc.identifier.journalWildlife Biologyen
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