Repository logo
 

Kalahari vulture declines, through the eyes of meerkatsยง

Published version
Peer-reviewed

Change log

Authors

Clutton-Brock, T 

Abstract

Vulture populations are experiencing rapid declines across the globe. While the declines have been most precipitous in Asia, recent reports suggest African populations are likewise imminently threatened. As the factors underlying these general population trends are multifaceted and will vary in their relative intensity spatially, it is imperative that monitoring data across different vulture populations is assimilated if targeted conservation action is to prove most effective. In this study, we highlight a medium-term decline in the African White-backed Vulture Gyps africanus population inhabiting the southern Kalahari, South Africa, using a long-term behavioural data set collected from a habituated population of meerkats Suricata suricatta. Meerkats emit an alarm call on sighting airborne vultures, which elicits a group-level response, such that the rates at which this behaviour is recorded in meerkats provides a high-resolution proxy for local vulture abundance. Although unconventional, this sampling method uncovered a steady decline over 17 years in White-backed Vulture numbers that mirrors the temporal decline recently documented in other southern African populations.

Tout autour du globe, les populations de vautours connaissent un dรฉclin rapide. Alors que ce dรฉclin sโ€™est prรฉcipitรฉ au sein des populations dโ€™Asie, de rรฉcents rapports suggรจrent que les populations africaines sont au moins aussi menacรฉes ร  court terme. Les facteurs qui influencent ces tendances dรฉmographiques gรฉnรฉrales ont plusieurs facettes et varient de maniรจre spatiale dans leur intensitรฉ relative. Par consรฉquent, il est impรฉratif de collecter et regrouper des donnรฉes de surveillance sur diffรฉrentes populations pour mettre en place des stratรฉgies de conservation efficaces et ciblรฉes. Dans cette รฉtude, je souligne le dรฉclin ร  moyen terme dโ€™une population de Vautour africain (Gyps africanus) vivant dans la partie sud du Kalahari, en Afrique du Sud, en utilisant un jeu de donnรฉes comportementales de long terme, rรฉcoltรฉes sur une population de suricates (Suricata suricatta) habituรฉs. Les suricates รฉmettent une vocalisation dโ€™alarme lorsquโ€™ils voient un vautour en vol, ce qui dรฉclenche une rรฉponse anti-prรฉdateur au sein du groupe. La frรฉquence ร  laquelle ce comportement est observรฉ et relevรฉ chez les suricates reprรฉsente un substitut fiable et de grande rรฉsolution pour attester de lโ€™abondance locale de vautours. Bien que peu conventionnelle, cette mรฉthode dโ€™รฉchantillonnage a mis en รฉvidence une diminution constante du nombre de Vautours africains au cours de 17 derniรจres annรฉes, qui reflรจte le dรฉclin rรฉcemment documentรฉ dans dโ€™autres populations dโ€™Afrique australe.

Description

Keywords

Gyps africanus, population decline, vulture conservation

Journal Title

Ostrich

Conference Name

Journal ISSN

0030-6525
1727-947X

Volume Title

88

Publisher

National Inquiry Services Center (NISC)
Sponsorship
NERC (1505720)
European Research Council (294494)
This paper has relied on the longitudinal behavioural data of the Kalahari Meerkat Project, which is currently supported by the European Research Council (Research Grant no. 294494 to TCB since July 2012), the Mammal Research Institute at the University of Pretoria, and the University of Zurich. JBT is funded by a NERC Doctoral Training Program.