Browsing RESEARCH: Chimimba C by Title
Now showing items 28-46 of 46
-
A mathematical epidemiological model of gram-negative Bartonella bacteria: Does differential ectoparasite load fully explain the differences in infection prevalence of Rattus rattus and R. norvegicus?
(Taylor & Francis, 2012)We postulate that the large difference in infection prevalence, 24% versus 5%, in R. norvegicus and R. rattus, respectively, between these two co-occurring host species may be due to differences in ectoparasite and potential ... -
Molecular and morphometric assessment of the taxonomic status of Ectemnorhinus weevil species (Coleoptera : Curculionidae, Entiminae) from the sub-Antarctic Prince Edward Islands
(BLACKWELL PUBLISHING, 2006-08)There are long-standing controversies on the taxonomic status of Ectemnorhinus weevil species occurring on the sub-Antarctic Prince Edward Islands. Since the two islands that constitute the Prince Edward Islands archipelago ... -
Molecular characterization of cosmopolitan and potentially co-invasive helminths of commensal, murid rodents in Gauteng Province, South Africa
(Springer, 2018)Concurrent studies of helminth parasites of introduced and native rodent species are few and miss the opportunity to identify potential co-invasive parasite species. This study employed molecular tools to infer the phylogeny ... -
Net effects of multiple stressors in freshwater ecosystems: a meta-analysis
(John Wiley & Sons Ltd, 2016)The accelerating rate of global change has focused attention on the cumulative impacts of novel and extreme environmental changes (i.e. stressors), especially in marine ecosystems. As integrators of local catchment and ... -
Niche complementarity between an alien predator and native omnivorous fish in the Wilge River, South Africa
(Springer, 2018)A major challenge in biological invasions is to predict community susceptibility to invasion. This study investigated trophic interrelationships between an alien predator, largemouth bass (Micropterus salmoides), and native ... -
Non-invasive monitoring of adrenocortical activity in free-ranging Namaqua rock mice Micaelamys namaquensis from South Africa in response to anthropogenic land use and season
(2019)Stress in animals has been linked to behavioural and physiological changes in response to environmental, social and anthropogenic stimuli. Hence, stress-related responses in animals, especially in rodents, have been used ... -
Ontogenetic variation and craniometric sexual dimorphism in the social giant mole-rat, Fukomys mechowii (Rodentia: Bathyergidae), from Zambia
(2010-10)The degree of maxillary molar tooth-row eruption and wear were used to assign samples of the social giant mole-rat, Fukomys mechowii, from Zambia, into nine relative age classes in order to assess ontogenetic (age) variation ... -
Photoperiodic effects on the male gonads of the Namibian gerbil, Gerbilliscus cf. leucogaster from central Namibia
(2020)Photoperiodism has been shown to be an important synchronizer of seasonal reproduction in many rodent species in the wild; it is a reliable cue as in the southern hemisphere it coincides with the onset of rainfall and hence ... -
Reproductive photoresponsiveness in male spiny mice from South Africa
(Zoological Society of London, 2012)Many seasonally breeding mammals use changes in photoperiod as a reliable cue to time reproduction. Photoperiodic timing assists an animal in predicting annual environmental changes in its habitat and therefore, enables ... -
Seasonal changes in reproductive development in male spiny mice (Acomys spinosissimus) from South Africa
(Elsevier, 2012)Seasonal reproduction is a common characteristic of many small mammals which inhabit seasonal environments in temperate regions, the sub-tropics as well as the tropics. It is important for an animal to reproduce during ... -
Seasonal reproduction in the eastern rock elephant-shrew: Influenced by rainfall and ambient temperature?
(Zoological Society of London, 2012)Because environmental conditions vary seasonally in most regions, many small mammals reproduce at a specific time of the year to maximize their reproductive success. In the tropics and subtropics, the breeding season is ... -
Seasonal reproduction in the female spiny mouse from South Africa
(The Zoological Society of London, 2010)Many mammal species reproduce seasonally because of annual fluctuations in temperature, rainfall and photoperiod in often nutritionally challenging habitats. The reproductive biology of many small southern African mammals ... -
Spatio-temporal separation between lions and leopards in the Kruger National Park and the Timbavati Private Nature Reserve, South Africa.
(Elsevier B.V., 2015)Understanding of the underlying processes that drive coexistence among apex predators is of great importance to landscape managers overseeing their persistence. Two pressing questions stand out. These questions relate ... -
Trophic interrelationships between the exotic Nile tilapia, Oreochromis niloticus and indigenous tilapiine cichlids in a subtropical African river system (Limpopo River, South Africa)
(Springer, 2011)The stable isotope ratio and seasonal changes in diet of two indigenous (Oreochromis mossambicus, Tilapia rendalli) and one exotic (Oreochromis niloticus) tilapiine cichlids in the subtropical Limpopo River, South ... -
Trophic overlap between fish and riparian spiders: potential impacts of an invasive fish on terrestrial consumers
(John Wiley & Sons Ltd., 2016)Studies on resource sharing and partitioning generally consider species that occur in the same habitat. However, subsidies between linked habitats, such as streams and riparian zones, create potential for competition between ... -
The tusked king cricket, Libanasidus vittatus (Kirby, 1899) (Anostostomatidae), from South Africa: morphological and molecular evidence suggest two cryptic species
(Koninklijke Brill NV, Leiden, 2009)An evaluation of genetic structuring and morphometric variation within tusked king crickets, Libanasidus vittatus (Kirby, 1899), from South Africa suggests two main population assemblages. Maximum likelihood (ML), Parsimony, ... -
Untangling the roles of fire, grazing and rainfall on small mammal communities in grassland ecosystems
(Springer-Verlag, 2007-09-11)In grassland systems across the globe, ecologists have been attempting to understand the complex role of fire, grazing and rainfall in creating habitat heterogeneity and the consequences of anthropogenic control of these ... -
Using faecal glucocorticoid metabolite analyses to elucidate stressors of African wild dogs Lycaon pictus from South Africa
(2020)There are few stressful factors which have been investigated to affect adrenocortical function in the African wild dog (AWD) Lycaon pictus. Understanding what animals perceive as stressors is important for not only the ...