John Mendelsohn

John Mendelsohn
RAISON, Windhoek, Namibia

About

52
Publications
39,575
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
1,162
Citations

Publications

Publications (52)
Technical Report
Full-text available
A synthesis of information on the Cuando (Kwando) River
Article
Protected areas are intended as tools in reducing threats to wildlife and preserving habitat for their long-term population persistence. Studies on ranging behavior provide insight into the utility of protected areas. Vultures are one of the fastest declining groups of birds globally and are popular subjects for telemetry studies, but continent-wid...
Article
Full-text available
Birds of prey are subject to opposing selective pressures for optimal hunting success and the storage of energy reserves. The latter requirement is best met by large size. while small size contributes to better flight .performance in catching agile prey. It is argued that breeding raptors need both to store large reserves against food shortages and...
Article
Double-brooding is an avian breeding strategy where birds produce at least two successful nests in a single season. Double-brooding is seen most frequently in small passerines for which the breeding season is lengthy enough that they can easily fit in multiple nesting attempts. Such a pattern of breeding is therefore less common among large birds w...
Article
Full-text available
Namibia is characterized by a history of discriminatory customary practices against women with regards to access to land, rights over land, and security of land tenure. Since independence in 1990, the country has adopted policies and legislative frameworks to bring about gender equality in all spheres of life, including the transformation of land t...
Book
Full-text available
Geographic profile of south-western Angola, reviewing and presenting information on geology, soils, climate, the natural environment, river systems, people and socio-economic circumstances
Chapter
Full-text available
Landscape changes in Angola are dominated by woodland and forest losses due to clearing for crops, bush fires (which convert woodland into shrubland) and the harvesting of fuel (as wood and charcoal) and timber. Rates of clearing for small-scale dryland crops are high over much of Angola as a result of poor soil fertility. Erosion is also a severe...
Technical Report
Full-text available
Geographic profile of south-eastern Angola, reviewing and presenting information on geology, topography, soils, climate, the natural environment, river systems, people and socio-economic circumstances
Article
Full-text available
Wildfires burn large parts of the tropics every year, shaping ecosystem structure and functioning. Yet the complex interplay between climate, vegetation and human factors that drives fire dynamics is still poorly understood. Here we show that on all continents, except Australia, tropical fire regimes change drastically as mean annual precipitation...
Article
Full-text available
Little is understood about the dispersion and movements of Palaearctic migrant raptors while wintering in southern Africa. The high temporal and spatial resolution of GPS telemetry data provided the opportunity to describe how space is used by one such migratory raptor in its wintering range, the lesser spotted eagle Aquila pomarina. Kernel density...
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
The use of Global Positioning Systems (GPS) and Geographical Information Systems (GIS) in disease surveys and reporting is becoming increasingly routine, enabling a better understanding of spatial epidemiology and the improvement of surveillance and control strategies. In turn, the greater availability of spatially referenced epidemiological data i...
Book
Full-text available
Spatial analysis of poverty in Namibia
Article
Full-text available
The Cape Vulture (Gyps coprotheres) is an obligate cliff-nesting vulture endemic to southern Africa. Its range and population size have declined markedly over the last century. Namibia has just one colony, located on the cliffs of the Waterberg Plateau, with a population estimated to be eight adult birds, including two females. The species is regar...
Article
Full-text available
Molting females of Monteiro's Hornbills (Tockus monteiri) seal themselves in nest cavities to breed until chicks are about half grown. To gain insight into the chronology of energy requirements of the Monteiro's Hornbill family unit in relation to this peculiar breeding strategy, we measured a number of ecological, physiological, and environmental...
Article
Full-text available
Molting females of Monteiro's Hornbills (Tockus monteiri) seal themselves in nest cavities to breed until chicks are about half grown. To gain insight into the chronology of energy requirements of the Monteiro's Hornbill family unit in relation to this peculiar breeding strategy, we measured a number of ecological, physiological, and environmental...
Article
Full-text available
Hornbills display a unique breeding habit in which the female seals herself into the nest cavity prior to egg laying and remains ensconced for most of the breeding cycle. This habit necessitates long-term sperm storage, which considerably lengthens the fertile period of the female. This in turn increases the amount of time available to females to e...
Article
Full-text available
One immature and one subadult Lesser Spotted Eagle, Aquila pomarina, were followed by satellite telemetry from their non-breeding areas in Namibia. Both birds were fitted with transmitters (PTTs) in February 1994 and tracked, the immature for six months and three weeks, the subadult for eight months and two weeks, over distances of 10 084 and 16 77...
Article
Full-text available
Education depends on resources that may be tangible (teachers, facilities, textbooks, money) or intangible (political will, parental support). Considerations of space, usually in the form of questions containing the word "where", constitute another resource issue that confronts educational managers almost daily. Questions like "Where are new school...
Article
Full-text available
Meyburg, B.-U., Mendelsohn, J. M., Ellis, D. H., Smith, D.G., Meyburg, C. & Kemp, A.C. 1995. Year-round movements of a Wahlberg's Eagle Aquila wahlbergi tracked by satellite. Ostrich 66: 135–140.An adult female Wahlberg's Eagle from northern Namibia was tracked by satellite over a total distance of 8816 km and located 104 times between 11 February...
Article
Full-text available
Aerial cartwheeling flights of raptors, particularly eagles, are spectacular interactions in which birds lock feet and fall earthward while cartwheeling about a common axis. This is traditionally seen as courtship behaviour, despite the fact that injuries and some fatalities have been reported. We solicited unpublished accounts from 20 raptor biolo...
Article
Full-text available
MENDELSOHN, J. M. 1989. Habitat preferences, population size, food and breeding of six owl species in the Springbok Flats, South Africa. Ostrich 60:183-190.Information on the habitat preferences, population size, food and breeding of Barn, Grass, Whitefaced, Marsh, Pearlspotted and Spotted Eagle Owls was obtained in a 6900-ha area in the Springbok...
Article
Full-text available
Mendelsohn, J. M. & Jaksić, F. M. 1989. Hunting behaviour of Blackshouldered Kites in the Americas, Europe, Africa and Australia. Ostrich 60:1-12.We review studies of hunting behaviour and food habits of Blackshouldered Kites Elanus caeruleus in Chile, California, Spain, Morocco, the Ivory Coast, South Africa and Australia. The general sequence, ti...
Article
Full-text available
Mendelsohn, J. M., Kemp, A. C, Biggs, H. C, Biggs, R. & Brown, C.J. 1989. Wing areas, wing loadings and wing spans of 66 species of African raptors. Ostrich 60:35-42.The paper provides data on the wing areas of 855 birds of 66 species and wing spans of 918 individuals of 58 species of African raptors. Two measures of wing loading were calculated fo...
Article
Full-text available
Slotow, R. H., Mendelsohn, J. M. & Perrin, M. R. 1987. The diet of adult and nestling Blackshouldered Kites, and breeding success. Ostrich 59:150-154.Blackshouldered Kite diet was examined at Settlers, Transvaal, by pellet analysis. Rodents made up 98% by number of the adult diet, comprising 51% Otomys angoniensis, 31% Praomys natalensis, and 16% R...
Article
Full-text available
Mendelsohn, J. M. 1983. Social behaviour and dispersion of the Blackshouldered Kite. Ostrich 54: l–18. Colour-marked Blackshouldered Kites Elanus caeruleus were studied at Settlers in the Springbok Flats, South Africa. Males usually established territories where females joined them as mates after moving around between territorial males. There were...
Conference Paper
Full-text available
In the austral winter of 1975 great numbers of Salvin's Prions Pachyptila salvini and Fairy Prions P. turtur returned sporadically to Marion Island (46 57S, 37 45E). These influxes occurred, and ended abruptly, just before a severe cold front passed the island. It is suggested that prions moved south to avoid inclement weather and poor feeding cond...

Network

Cited By

Projects