Browsing Biological Sciences by Title
Now showing items 576-595 of 733
-
The sardine run : investigating sardine and predator distribution in relation to environmental conditions using GIS and remotely sensed products.
(2009)The sardine run is a spectacular but poorly understood natural phenomenon. This research aims to broaden scientific knowledge pertaining to sardine, Sardinops sagax, distribution, both in relation to their predators and ... -
Screening of traditionally used South African medicinal plants against Candida albicans.
(2003)Candida species were discovered more than a century ago as a causative organism of oral thrush. In HIV patients, the presence of oral candidiasis has been shown to be the earliest opportunistic infection. Candidiasis ... -
Screening, selection and clonal propagation of Amaranthus dubius genotypes with different calcium and iron content.
(2018)Decontamination of Amaranthus dubius field-derived nodal explants was achieved in a 10 min soak with 1% (v/v) NaOCl and 2 drops of Tween 20® followed by three rinses in sterile distilled water, immersion in an antibiotic ... -
Scrounging herbivores use both patch quality and dominance status of patch holders when deciding which patch to join.
(2011)One of the major costs of group living is increased competition due to social information. Social information allows foragers to gain information about the location and the quality of food patches from observing other group ... -
Seasonal home range and foraging movements of the Wahlberg's epauletted fruit bat (Epomophorus wahlbergi) in an urban environment.
(2012)Urbanisation through the process of habitat loss and fragmentation has caused drastic changes in ecosystem dynamics around the world. Many species can no longer survive in these urban areas; however there are those species ... -
Seasonal pharmacological and phytochemical properties of medicinal bulbs.
(2010)Medicinal bulbs form part of the diversified flora in South Africa. The plants are used extensively in South African traditional medicine in the treatment of various ailments. Due to the ever-increasing demand and the ... -
Seasonal variation in the thermal biology of the rock hyrax (Procavia capensis)
(2003)Animals in the Southern African sub-region are faced with unpredictable seasonal rainfall patterns and unpredictably low resource availability due to the influence of the El Nino Southern Oscillation System. This has led ... -
The secretory apparatus of Ceratotheca triloba (Pedaliaceae) : morphology and chemical composition of the secretion.
(2012)Ceratotheca triloba (Bernh.) E. Mey. ex Hook. f., commonly known as the wild foxglove, is a fast growing annual that is indigenous to southern Africa. The surface of the plant is covered with fine, hair-like trichomes, ... -
Secretory structures of croton gratissimus Burch. Var. gratissimus (Euphorbiaceae): Micromorphology and Histophytochemistry.
(2018)Croton gratissimus Burch. variety (var.) gratissimus (Euphorbiaceae) has a widespread distribution in tropical Africa and is frequently used in African traditional medicine to treat various ailments. In South Africa, ... -
Seed and seedling dynamics of certain acacia species as affected by herbivory, grass competition, fire, and grazing system.
(2001)The influence of herbivory, grass competition and grazing system on emergence, growth and survival of Acacia seedlings in burnt and unburnt areas was investigated in their first growing season, from September 1997 to May ... -
Seed dormancy and germination in Protea compacta R.Br. and Leucadendron daphnoides Meisn.
(1974)The germination responses of seed to a wide variety of treatments showed that both the pericarp and the embryo contribute to the dormant condition in Protea compacta. Germination can be improved to a greater or lesser ... -
Seed germination and medicinal properties of Alepidea species.
(2009)The rhizomes of Alepidea amatymbica and Alepidea natalensis are used for medicinal purposes. Because of the increase in demand for these plants the species is becoming scarce. As the seed biology of neither species is well ... -
Seed production studies with weeping lovegrass Eragrostis curvula (Schrad.) Nees.
(1976)No abstract available. -
Seedling establishment of Themeda triandra Forssk. in the montane grasslands of Natal.
(1994)Soil erosion and vegetation destruction have reached serious proportions in disturbed areas of the montane grasslands of the Natal Drakensberg. Little is known of the inherent ability of indigenous grasses to produce ... -
Seeing the wood for the trees : an evaluation of the Buffelsdraai Landfill Community Reforestation Project.
(2016)Cities, and African cities in particular, will need a suite of relevant tools and approaches to deal with the varied climate change-related threats that these cities will likely endure in the future. African cities will ... -
Selected aspects of the adaptive biology and ecology of the Namib Desert golden mole (Eremitalpa granti Namibensis)
(1989)Eremitalpa granti namibensis is a small blind subterranean insectivore (Chrysochloridae) endemic to the Namib Desert sand dunes. This study of the biology and ecology of the Namib mole assesses its adaptive strategies ... -
Selection and micropropagation of solanum nigrum genotypes with varying calcium and iron content.
(2018)A direct organogenesis protocol was established for Solanum nigrum using leaf explants from seedling plants. The post acclimatisation yield of the seedling-derived leaf explants was 25 plants/explant. It included decontaminating ... -
Selective impacts on the vigour and mortality of Aristida junciformis (subsp. junciformis)
(2019)The aim of grazing management is to maximise livestock production by maintaining high sward quality. Many southern African grasslands have become degraded allowing grass species unfavourable for livestock production, such ...