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Now showing items 11-20 of 51
Evidence for panmixia despite barriers to gene flow in the southern African endemic, Caffrogobius caffer (Teleostei: Gobiidae)
(BioMed Central, 2008-12)
Background: Oceanography and life-history characteristics are known to influence the genetic structure of marine species, however the relative role that these factors play in shaping phylogeographic patterns remains ...
Non-indigenous ungulates as a threat to biodiversity
(Wiley-Blackwell, 2009-07)
Non-indigenous ungulate species pose a problem for conservation. They can be socially and economically valuable, but are also potentially harmful to biodiversity. Therefore, their introduction requires an explicit assessment ...
The extent and impacts of ungulate translocations : South Africa in a global context
(Elsevier, 2009-02)
Despite the apparent risks of the introduction of non-indigenous ungulates to biodiversity, relatively little is known globally about the pathways of introduction, propagule pressure and realized impacts of ungulate ...
Kadmium in Valsbaai : moniteringspotensiaal van die mariene slak, Oxystele tigrina (Mollusca)
(AOSIS, 2009-06)
’n Opname is onderneem van die kadmiumvlakke in die tussengetygebied van Valsbaai, Suid-
Afrika. Kadmiumkonsentrasies is seisoenaal bepaal in die water en sediment in verskillende
lokaliteite. Die metings is oor ’n periode ...
Thermal tolerance in a south-east African population of the tsetse fly Glossina pallidipes (Diptera, Glossinidae) : implications for forecasting climate change impacts
(2008-01)
For tsetse (Glossina spp.), the vectors of human and animal trypanosomiases, the physiological mechanisms linking variation in population dynamics with changing weather conditions have not been well established. Here, we ...
Chromosome painting among Proboscidea, Hyracoidea and Sirenia : support for Paenungulata (Afrotheria, Mammalia) but not Tethytheria
(2007-05)
Despite marked improvements in the interpretation of systematic relationships within Eutheria, particular nodes, including Paenungulata (Hyracoidea, Sirenia and Proboscidea), remain ambiguous. The combination of a rapid ...
Drosophilid assemblages as a bioindicator system of human disturbance in the Brazilian Savanna
(Springer, 2008-11)
According to the Convention on Biological Diversity (CBD) the development of bioindicators is extremely necessary to achieve the conservation targets by 2010, and insects are considered an effective group for this goal. ...
Chromosomal instability in Afrotheria : fragile sites, evolutionary breakpoints and phylogenetic inference from genome sequence assemblies
(BioMed Central, 2007-10)
Background: Extant placental mammals are divided into four major clades (Laurasiatheria, Supraprimates, Xenarthra and Afrotheria). Given that Afrotheria is generally thought to root the eutherian tree in phylogenetic ...
Evolutionary history of LINE-1 in the major clades of placental mammals
(Public Library of Science (PLOS), 2007-01)
Background. LINE-1 constitutes an important component of mammalian genomes. It has a dynamic evolutionary history characterized by the rise, fall and replacement of subfamilies. Most data concerning LINE-1 biology and ...
Die inkorporering van biomerkers in die assessering van die ekologiese risiko van chemiese bodemkontaminante
(AOSIS Publishing, 2007)
Soil is an important but complex natural resource which is increasingly used as sink for chemicals. The monitoring of soil quality and the assessment of risks posed by contaminants have become crucial. This study deals ...