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Search Results: 1 - 10 of 673557 matches for " A. J Hall-Martin "
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Symposium on the Kalahari Ecosystem summary and conclusions
A. J Hall-Martin
Koedoe : African Protected Area Conservation and Science , 1984, DOI: 10.4102/koedoe.v27i1.589
Abstract: This symposium has dealt largely with the Kalahari Gemsbok National Park (KGNP), an area which has been under the control of the National Parks Board of Trustees since 1931. The park, which covers some 9 600 km2 is part of an international conservation area which includes the adjoining 26 600 km2 Gemsbok National Park in Botswana and adjoining wildlife management areas.
Distribution and status of the African elephant Loxodonta africana in South Africa, 1652-1992
A.J. Hall-Martin
Koedoe : African Protected Area Conservation and Science , 1992, DOI: 10.4102/koedoe.v35i1.390
Abstract: The historical decline of African elephants to a low of 120 animals in 1920, and their subsequent recovery to over 10 000 is described for the major populations of South Africa. Population growth rates of 6,8 and 6,7 per annum are derived from census and estimates for the Kruger National Park and the Addo Elephant National Park respectively. The reasons for elephant population control in the Kruger National Park, and the impact of elephants on both the Kruger and Addo environments, are discussed. The translocation of young elephants to found new populations is mentioned. The consequent increase of elephant range and numbers in the next decade to a possible maximum of 31 000 km2 and 13 000 animals, is envisaged.
Range Expansion of the Yellowbilled Oxpecker Buphagus africanus into the Kruger National Park, South Africa
A.J. Hall-Martin
Koedoe : African Protected Area Conservation and Science , 1987, DOI: 10.4102/koedoe.v30i1.505
Abstract: The Yellowbilled Oxpecker, long believed extinct as a breeding species in the Republic of South Africa has been recorded regularly in the Kruger National Park since 1979. The first definite indication of breeding was recorded in January 1984, and final confirmation of breeding was observed in December 1985. The recovery of the ungulate populations of the park, in particular buffalo, from overhunting and rinderpest during the long period of absolute protection stretching from 1902, has ensured a suitable habitat for the immigrant Yellowbilled Oxpeckers. Circumstantial evidence indicates that the birds have colonised in the park from the population of the Gonarezhou National Park in south-eastern Zimbabwe. The movement of the birds across the 50 km Sengwe area separating the two parks is explained by the cessation of cattle dipping and the movement of buffalo out of Gonarezhou from 1977 onwards. These events were a direct consequence of the hostilities in Zimbabwe at that time.
Application of stereo photogrammetric techniques for measuring African Elephants
A. J Hall-Martin,H Ruther
Koedoe : African Protected Area Conservation and Science , 1979, DOI: 10.4102/koedoe.v22i1.658
Abstract: Measurements of shoulder height and back length of African elephants were obtained by means of stereo photogrammetric techniques. A pair of Zeiss UMK 10/1318 cameras, mounted on a steel frame on the back of a vehicle, were used to photograph the elephants in the Addo Elephant National Park, Republic of South Africa. Several modifications of normal photogrammetry procedure applicable to the field situation (eg. control points) and the computation of results (eg. relative orientation) are briefly mentioned. Six elephants were immobilised after being photographed and the measurements obtained from them agreed within a range of 1 cm-10 cm with the photogrammetric measurements.
Transport and boma management techniques for black rhinoceros Diceros bicomis as used in the Etosha/Vaalbos operation
J.P. Raath,A.J. Hall-Martin
Koedoe : African Protected Area Conservation and Science , 1989, DOI: 10.4102/koedoe.v32i2.476
Abstract: Selected Papers from the Rhinoceros Conservation Workshop, Skukuza, Kruger National Park,31 August – 4 September 1988 The translocation of six black rhinoceros from the Etosha National Park (Namibia) to the Vaalbos National Park (Republic of South Africa) is described. Data are provided on the transporting vehicle, the capture, transport and off-loading procedures followed while aspects of boma management are briefly dealt with.
Radio transmitter implants in the horns of both the white and the black rhinoceros in the Kruger National Park
D.J. Pienaar,A.J. Hall-Martin
Koedoe : African Protected Area Conservation and Science , 1991, DOI: 10.4102/koedoe.v34i2.425
Abstract: The procedure for implanting radio transmitters into the horns of white and black rhinoceroses is described. Mean transmitter life in the white rhinoceros was 13,9 months which is significantly longer than the 9,7 months in black rhinoceros. In the white rhinoceros a significant sex-related difference in transmitter life was found with the transmitters in males lasting a mean of 12,1 months compared to the 15,3 months in females.
A note on the feasibility of introducing giraffe to the Kalahari Gemsbok National Park
A.J. Hall-Martin,G. de Graaff
Koedoe : African Protected Area Conservation and Science , 1978, DOI: 10.4102/koedoe.v21i1.973
Abstract: During several visits to the Kalahari Gemsbok National Park (KGNP) the introduction of giraffe Giraffa camelopardalis to the Park was discussed. This note has been prepared to provide some background information for an eventual decision to be taken.
Behaviour and recruitment of translocated black rhinoceros diceros bicornis
A.J. Hall-Martin,L. Penzhorn
Koedoe : African Protected Area Conservation and Science , 1977, DOI: 10.4102/koedoe.v20i1.941
Abstract: Black rhinoceros were translocated to the Addo Ele- phant National Park from Kenya and released into a small fenced enclosure. Serious fighting attributed to the conditions under which the animals were released, the unusually high population density, the meeting of strange animals, aggression associated with mating and individual temperament resulted in the deaths of three animals within three weeks. Later fighting between bulls accounted for two more animals. A peak in mating activity was recorded during spring to mid-summer, followed by a peak calving period in late summer. The calving interval (35 months) is longer than that of unrestricted populations but ages at first mating in cows (4 years 6 months, 4 years 7 months) are comparable. First parturition at Addo occurs later (8 years, 8 years 5 months) than in wild animals and the young are hidden for the first few days after birth. Under conditions of stress a subadult bull readily took to swimming as a means of escaping from other animals.
The problem of maintaining large herbivores in small conservation areas: deterioration of the grassveld in the Addo Elephant National Park
P. Novellie,A.J. Hall-Martin,D. Joubert
Koedoe : African Protected Area Conservation and Science , 1991, DOI: 10.4102/koedoe.v34i1.413
Abstract: Changes in vegetation cover and species composition in a grassland community during a six year period are reported. The grass Themeda triandra and the dwarf shrub Helichrysum rosum decreased in abundance, whereas the grass Eragrostis obtusa increased. Comparison of grazed plots with fenced plots revealed large herbivores were responsible for the increase in abundance ofE. obtusa. The abundance of T. triandra was influenced by large herbivores, but rainfall fluctuations apparently also played a role. The decline in relative abundance of/7. rosum was evidently not caused by large herbivores. Grass cover was closely determined by rainfall. A drought-induced decline in forage abundance evidently caused the buffalo population to crash.
A note on feeding habits, Ectoparasites and measurements of the Black-Backed Jackal Canis Mesomelas from Addo Elephant National Park
A.J Hall-Martin,B. P Botha
Koedoe : African Protected Area Conservation and Science , 1980, DOI: 10.4102/koedoe.v23i1.642
Abstract: DsitSi from a small sample of black-backed jackals confined to the National Park indicated that they were opportunistic feeders taking various insects, molluscs, reptiles, birds, mammals and fruits as available. Raiding of ostrich Struthio camelus nests and the probable technique of egg-breaking is also recorded. Body measurements of these jackals fall with the range reported for this species in the Cape Province of South Africa. Observations on age indicate spring or early summer births.
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