Unusual Sightings: Sable research at Vumbura Plains
The latest installment of Wilderness Safaris’ Unusual Sightings comes to us courtesy of Glynis Humphrey, Brian Rode, Onkabetse Mothupi, and Michael Hensman at Vumbura Plains Camp in Botswana:
The sable antelope, Hippotragus niger, has shown some dramatic declines in parts of its range in southern Africa. Despite fairly intensive study in the Kruger National Park and other areas, the reasons for these declines are imperfectly understood.
It is for this reason that an investigation into the home range and habitat use of the species has been initiated in the Vumbura area in the Okavango Delta. Here a relative stronghold of sable exists, allowing an investigation into what factors allow the species to thrive here. Michael Hensman, an MSc student from the University of Witwatersrand and HOORC (being jointly supervised by Prof Norman Owen-Smith and Dr Casper Bonyongo), has just begun his research project using the relatively new technology of Geographical Positioning Systems (GPS) collars to produce fine scale movement data from three different herds.
We have so far managed to fit two collars onto two sable cows and are indebted to the assistance of veterinarian Dr Dane Hawk and gyrocopter pilot Mark Muller without whom the exercise would not have been possible. Dr Casper Bonyongo also lent valuable field experience during the operation.
The first cow darted was part of a herd of 22 animals that use the area in the north-west of the Vumbura Concession around the airstrip. This herd is well known and is comfortable with vehicles, allowing a close enough approach for darting from a vehicle. After some initial challenges this cow was successfully darted, immobilised and collared by Dr. Hawk. All relevant measurements and samples were taken from the cow before she was ‘reversed’ and allowed to rejoin the rest of the herd. Further observations on that day, the following morning and subsequently, suggest she has recovered completely and has continued to hold her position as the dominant female within the herd.
The second cow darted was located from the air by Mark Muller who guided us into an area to the north-east of Vumbura Plains Camp. We eventually located the 15-strong herd in an area of open grassland within mopane woodland. We were again able to successfully dart a selected cow from the vehicle and following all checks and processing of the animal, Dr Hawk successfully revived her, allowing her to rejoin the herd without incident. She was again located the following day and found to be behaving normally.
The third herd intended for inclusion in the study had in the meantime moved into a temporarily inundated area we were unable to access. We will attempt a second operation later in September and are excited to see the results from this study and what role these might play in the conservation of this iconic species.
Tags: Wilderness Safaris
