Tony Robertson

Tony Robertson
JARO Consultancy: http://www.jaroconsultancy.com

BSc Zoology; MSc Resource Management

About

29
Publications
17,139
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1,364
Citations
Introduction
Currently busy with the Atlas of Namibia -version 2. Previously involved in the compilation of brief country profiles of several African countries (Tanzania, Ghana, Uganda, Rwanda). Also involved with the management and design of several natural resource databases used in the communal conservancy program in Namibia.
Additional affiliations
March 1987 - December 1990
University of Cambridge
Position
  • Research Assistant

Publications

Publications (29)
Book
An updated Atlas in the same general style as the book produced in 2002.
Article
Full-text available
Red-billed Oxpecker, Buphagus erythrorhynchus, and Yellow-billed Oxpecker, B. africanus, occur in Namibia with populations restricted to the extreme north-eastern parts (both species) and north-western parts of the country (Yellow-billed Oxpecker). The Red Data status of Red-billed Oxpecker in Namibia is Rare or Peripheral while Yellow-billed Oxpec...
Book
Full-text available
An assessment of changes in the status of children in Namibia between the years 1991 and 2011
Book
Full-text available
Analysis of population and housing data from the 2011 census for young people under 25
Article
Full-text available
Published relationships were used to build a mathematical model that predicts the daily net energy balance of free-ranging domestic sheep (Ovis aries L.) grazing in the U.K. hills. Net energy balance was predicted for a plausible range of environmental conditions. The behaviour of the model suggested the following predictions. Locomotion will be a...
Article
Both redbilled oxpeckers (Buphagus erythrorhynchus) and yellowbilled oxpeckers (Buphagus africanus) have experienced recent population decreases in southern Africa largely as a result of cattle dipping against ticks, their primary source of food. In Namibia, oxpeckers are confined largely to the Caprivi region in the north-east and the yellowbilled...
Article
Molecular techniques have enabled behavioural ecologists to reassess mating systems from a genetic perspective. Studies of paternity frequently reveal that mating behaviour does not always reflect parentage, and may bring to light alternative mating tactics. Here we present a comparison of behavioural and genetic measures of male reproductive succe...
Article
Namibia's avifauna includes at least 14 species currently classified as national endemics or near-endemics. Line transect sampling of 10 of these was undertaken over 7 months in 1996. For all species, significant regression relationships were obtained between calculated bird density and environmental variables (altitude, rainfall and vegetation typ...
Article
Full-text available
Namibia's state protected area network (PAN) covers 13.8% of the country's land area, but is seriously inadequate as a basis for effective biodiversity conservation. The early parks system was not designed with biological diversity in mind, and reflects instead a history of ideological, economic and veterinary considerations. Currently, parks in th...
Article
Full-text available
Namibia supports a highly diverse avifauna of 644 species, including over 90 species endemic to the southern African subregion and 13 species endemic to the country. Patterns of species diversity in relation to protected areas and habitat types were analysed using data from the Southern African Bird Atlas Project. A modified Shannon index appropria...
Article
Full-text available
An assessment of population size is a fundamental stage in the conservation of any species. The recent availability of data from the Southern African Bird Atlas Project (SABAP) provides a tool to investigate the status and distribution of approximately 900 bird species covered by this work. It is often assumed, but rarely shown, that bird atlas rep...
Article
Full-text available
The chough Pyrrhocorax pyrrhocorax L. is largely restricted to areas of low-input agricultural land in the UK and Ireland. In parts of their range their numbers have declined dramatically in recent years following changes in land use. In this study, the relative importance of eight major habitat types to the foraging requirements of five breeding p...
Article
Full-text available
Theoretical models of the effect of population bottlenecks on genetic variation assume that individuals are removed at random from the population. We investigated this assumption in a naturally regulated, unstable population of Soay sheep (Ovis aries). During rapid population declines or 'crashes', individuals were not removed at random with respec...
Article
Annual variation in growth rate and sucking behaviour of lambs was studied in a fluctuating population of Soay sheep on Hirta, St. Kilda. Growth rates during the summer declined with increasing population size in the previous autumn despite an increase in time spent sucking in the first six weeks of life. The increase in time spent sucking was due...
Article
The mating system and ecology of black lechwe Kobus leche smithemani was studied in the Bangweulu Basin, northern Zambia. Black lechwe were migratory and concentrated at high density during the wet season on shallow water floodplain and peripheral grassland. Female lechwe were evenly distributed in small groups within the two major habitat types, a...
Article
Leks, on which males defend small clustered mating territories, may have evolved because of the unusual opportunities they provide for female choice of mating partners, and several studies of lek-breeding animals have demonstrated correlations between the mating success of males and their phenotype or behaviour. However, these could arise because (...
Article
Thesis (MSc. Resource Management)--University of Edinburgh, 1993.

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Projects (3)