scholarly journals Examining the Genetic Structure among Populations of the Common Cape River Crab Potamonautes Perlatus from River Systems in South Africa Reveals Hydrographic Boundaries

2003 ◽  
Vol 23 (4) ◽  
pp. 936-950 ◽  
Author(s):  
Savel Regan Daniels
Author(s):  
Patrick Schwab ◽  
Paul V. Debes ◽  
Thorsten Witt ◽  
Günther B. Hartl ◽  
San San Hmwe ◽  
...  

2020 ◽  
Vol 123 (4) ◽  
pp. 655-668
Author(s):  
N. Lenhardt ◽  
W. Altermann ◽  
F. Humbert ◽  
M. de Kock

Abstract The Palaeoproterozoic Hekpoort Formation of the Pretoria Group is a lava-dominated unit that has a basin-wide extent throughout the Transvaal sub-basin of South Africa. Additional correlative units may be present in the Kanye sub-basin of Botswana. The key characteristic of the formation is its general geochemical uniformity. Volcaniclastic and other sedimentary rocks are relatively rare throughout the succession but may be dominant in some locations. Hekpoort Formation outcrops are sporadic throughout the basin and mostly occur in the form of gentle hills and valleys, mainly encircling Archaean domes and the Palaeoproterozoic Bushveld Complex (BC). The unit is exposed in the western Pretoria Group basin, sitting unconformably either on the Timeball Hill Formation or Boshoek Formation, which is lenticular there, and on top of the Boshoek Formation in the east of the basin. The unit is unconformably overlain by the Dwaalheuwel Formation. The type-locality for the Hekpoort Formation is the Hekpoort farm (504 IQ Hekpoort), ca. 60 km to the west-southwest of Pretoria. However, no stratotype has ever been proposed. A lectostratotype, i.e., the Mooikloof area in Pretoria East, that can be enhanced by two reference stratotypes are proposed herein. The Hekpoort Formation was deposited in a cratonic subaerial setting, forming a large igneous province (LIP) in which short-termed localised ponds and small braided river systems existed. It therefore forms one of the major Palaeoproterozoic magmatic events on the Kaapvaal Craton.


2002 ◽  
Vol 4 (1) ◽  
pp. 49-54 ◽  
Author(s):  
Ernest C. J. Seamark ◽  
Wiesław Bogdanowicz

Pythagoras ◽  
2009 ◽  
Vol 0 (69) ◽  
Author(s):  
Sarah Bansilal

The Common Tasks for Assessment (CTA) was a new assessment programme that was introduced in 2002 in South Africa for all Grade 9 learners. The purpose of this paper is to articulate some concerns around the use of contextualised assessment activities in the CTA. The study reported here was carried out in 2003. Data for the study was generated from lesson observations and interviews with the participant teachers and groups of learners. It is argued that although the intentions behind the design of the CTA are well meaning and noble, there are in fact some learners who may be unintentionally disadvantaged by the design of the CTA which uses an extended context as a source for all the assessment tasks. In this paper two unintended consequences of using ‘real life’ contexts are identified and the implications of these are discussed, by linking the observations to research carried out in the UK and the USA.


2015 ◽  
Vol 11 (1) ◽  
pp. 137-148 ◽  
Author(s):  
Anthony O. Nwafor

The realization that the directors occupy important position in corporate governance, and as business men and women, cannot be prevented from having dealings with the company, demand a close scrutiny of corporate transactions in which they are directly or indirectly involved or have an interest to ensure that such interest is not placed above their duty to the company. One of the ways in which the law strives to achieve this balance is by imposing a duty on the director to disclose to the board any interest he has in company’s transactions. This requirement which was previously governed by the common law and the company’s articles, is presently increasingly finding a place in companies statutes in different jurisdictions. The paper examines, through a comparative analysis, the provisions on the duty of the director to disclose interest in company’s transactions in South Africa and United Kingdom with the aim of discovering the extent to which the statute in both jurisdictions upholds the common law prescriptions. The paper argues that the need for transparency in corporate governance and the preservation of the distinct legal personality of the company demand that the duty to disclose interest should be upheld even in those cases of companies run by a sole director.


2015 ◽  
Vol 11 (2) ◽  
pp. 8-20
Author(s):  
Anthony O. Nwafor

The quest to maximize profits by corporate administrators usually leaves behind an unhealthy environment. This trend impacts negatively on long term interests of the company and retards societal sustainable development. While there are in South Africa pieces of legislation which are geared at protecting the environment, the Companies Act which is the principal legislation that regulates the operations of the company is silent on this matter. The paper argues that the common law responsibility of the directors to protect the interests of the company as presently codified by the Companies Act should be developed by the courts in South Africa, in the exercise of their powers under the Constitution, to include the interests of the environment. This would guarantee the enforcement of the environmental interests within the confines of the Companies Act as an issue of corporate governance.


2018 ◽  
Vol 9 ◽  
Author(s):  
Ielyzaveta M. Ivanova ◽  
Craig T. Symes

The Common Starling Sturnus vulgaris has progressively expanded its range in South Africa since its introduction into Cape Town in the late 19th century. In the past few decades it has extended this range into Gauteng province. Using data from the Southern African Bird Atlas Project 2, this paper examines the spread and relative abundance changes for the species across South Africa over the past 10 years, with a detailed look at the recently-colonised Gauteng. Across South Africa, the Common Starling's distribution has shifted, and grown. As it spreads north along the coastline and northwards inland, some of the former range has been lost. In Gauteng, the species has shown a range and abundance expansion over the same period. If the observed trends are to continue, this species is likely to eventually become a prominent species across the entire country, and further north into the sub-region. However, the potential impact that this species has on indigenous avifauna is unknown and, in the face of rapid anthropogenic change, remains to be investigated.


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