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Too close and too far: quantifying black rhino displacement and location error during research

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Too close and too far : quantifying black rhino displacement and location error during research. / Plotz, Roan D.; Grecian, W. James; Kerley, Graham I. H. ; Linklater, Wayne L.

In: African Journal of Wildlife Research, Vol. 47, No. 1, 01.04.2017, p. 47-58.

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Plotz, RD, Grecian, WJ, Kerley, GIH & Linklater, WL 2017, 'Too close and too far: quantifying black rhino displacement and location error during research' African Journal of Wildlife Research, vol. 47, no. 1, pp. 47-58. https://doi.org/10.3957/056.047.0047

APA

Plotz, R. D., Grecian, W. J., Kerley, G. I. H., & Linklater, W. L. (2017). Too close and too far: quantifying black rhino displacement and location error during research. African Journal of Wildlife Research, 47(1), 47-58. https://doi.org/10.3957/056.047.0047

Vancouver

Plotz RD, Grecian WJ, Kerley GIH, Linklater WL. Too close and too far: quantifying black rhino displacement and location error during research. African Journal of Wildlife Research. 2017 Apr 1;47(1):47-58. https://doi.org/10.3957/056.047.0047

Author

Plotz, Roan D. ; Grecian, W. James ; Kerley, Graham I. H. ; Linklater, Wayne L. / Too close and too far : quantifying black rhino displacement and location error during research. In: African Journal of Wildlife Research. 2017 ; Vol. 47, No. 1. pp. 47-58.

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@article{76ff84327edd4972a8225cb1ff4729a5,
title = "Too close and too far: quantifying black rhino displacement and location error during research",
abstract = "Observer impacts on animal behaviour concern conservation managers and researchers of critically endangered species, like black rhino (Diceros bicornis). Repeated observations are sometimes necessary, but may distress and displace animals. Information from more remote observations using radio-triangulation is limited and includes larger measurement errors. We investigated the influence of observer visits on average daily displacement by 14 black rhinos in Hluhluwe-iMfolozi Park, South Africa, and the accuracy of triangulated locations with increasing observer distance and the time to complete bearing sets. Fortnightly observer visits for 34 months that often disturbed rhino (52{\%} of visits) had an insignificant impact on daily movements. However, increasing observer distance from rhino, and the time taken to triangulate, were both significant explanations of rhino location error. We recommend that measures to quantify and minimize observer influence become standard monitoring protocol and that bearings for radio-triangulation of black rhino locations occur from <1 km (not >2 km), and be completed within 30 minutes. Reporting measures for spatial error and observer influence permit the development of objective thresholds for data inclusion to improve radio-telemetry data and inter-study comparisons of black rhino range studies.",
keywords = "Observer disturbance, Radio-telemetry, Radio-triangualtion, Home range, Diceros bicornis minor, Hluhluwe-iMfolozi Park, Rhinoceros, Conservation management",
author = "Plotz, {Roan D.} and Grecian, {W. James} and Kerley, {Graham I. H.} and Linklater, {Wayne L.}",
year = "2017",
month = "4",
day = "1",
doi = "10.3957/056.047.0047",
language = "English",
volume = "47",
pages = "47--58",
journal = "African Journal of Wildlife Research",
issn = "2410-7220",
publisher = "Southern African Wildlife Management Association",
number = "1",

}

RIS (suitable for import to EndNote) - Download

TY - JOUR

T1 - Too close and too far

T2 - African Journal of Wildlife Research

AU - Plotz, Roan D.

AU - Grecian, W. James

AU - Kerley, Graham I. H.

AU - Linklater, Wayne L.

PY - 2017/4/1

Y1 - 2017/4/1

N2 - Observer impacts on animal behaviour concern conservation managers and researchers of critically endangered species, like black rhino (Diceros bicornis). Repeated observations are sometimes necessary, but may distress and displace animals. Information from more remote observations using radio-triangulation is limited and includes larger measurement errors. We investigated the influence of observer visits on average daily displacement by 14 black rhinos in Hluhluwe-iMfolozi Park, South Africa, and the accuracy of triangulated locations with increasing observer distance and the time to complete bearing sets. Fortnightly observer visits for 34 months that often disturbed rhino (52% of visits) had an insignificant impact on daily movements. However, increasing observer distance from rhino, and the time taken to triangulate, were both significant explanations of rhino location error. We recommend that measures to quantify and minimize observer influence become standard monitoring protocol and that bearings for radio-triangulation of black rhino locations occur from <1 km (not >2 km), and be completed within 30 minutes. Reporting measures for spatial error and observer influence permit the development of objective thresholds for data inclusion to improve radio-telemetry data and inter-study comparisons of black rhino range studies.

AB - Observer impacts on animal behaviour concern conservation managers and researchers of critically endangered species, like black rhino (Diceros bicornis). Repeated observations are sometimes necessary, but may distress and displace animals. Information from more remote observations using radio-triangulation is limited and includes larger measurement errors. We investigated the influence of observer visits on average daily displacement by 14 black rhinos in Hluhluwe-iMfolozi Park, South Africa, and the accuracy of triangulated locations with increasing observer distance and the time to complete bearing sets. Fortnightly observer visits for 34 months that often disturbed rhino (52% of visits) had an insignificant impact on daily movements. However, increasing observer distance from rhino, and the time taken to triangulate, were both significant explanations of rhino location error. We recommend that measures to quantify and minimize observer influence become standard monitoring protocol and that bearings for radio-triangulation of black rhino locations occur from <1 km (not >2 km), and be completed within 30 minutes. Reporting measures for spatial error and observer influence permit the development of objective thresholds for data inclusion to improve radio-telemetry data and inter-study comparisons of black rhino range studies.

KW - Observer disturbance

KW - Radio-telemetry

KW - Radio-triangualtion

KW - Home range

KW - Diceros bicornis minor

KW - Hluhluwe-iMfolozi Park

KW - Rhinoceros

KW - Conservation management

U2 - 10.3957/056.047.0047

DO - 10.3957/056.047.0047

M3 - Article

VL - 47

SP - 47

EP - 58

JO - African Journal of Wildlife Research

JF - African Journal of Wildlife Research

SN - 2410-7220

IS - 1

ER -

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ID: 249951334