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Browsing by Author "Underhill, Les"

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A comparative study of stochastic models in biology

Author: Brandão, Anabela de Gusmão Date: 1997 In many instances, problems that arise in biology do not fall under any category for which standard statistical techniques are available to be able to analyse them. Under these situations, specifics methods have to be developed to solve and ... Read more
A comparative study of stochastic models in biology

Author: Brandão, Anabela de Gusmão Date: 1997 Read more
The African penguin Spheniscus demersus : conservation and management issues

Author: Waller, Lauren Date: 2011 The African penguin is a southern African endemic, with its breeding distribution within the Benguela Upwelling Ecosystem. The IUCN conservation status of this species was re-classified from ‘Vulnerable’ to ‘Endangered’ in 2010. This thesis ... Read more
Analysis of distribution maps from bird atlas data : dissimilarities between species, continuity within ranges and smoothing of distribution maps

Author: Erni, Birgit Date: 1998 A dissimilarity coefficient for estimating the dissimilarity between two bird atlas distributions is developed. This coefficient is based on the Euclidean distance concept. The atlas distributions are compared over all quarter degree grid ... Read more
Application of ANOVA for the analysis of temporal and spatial differences in the length of pelagic goby preyed on by Cape fur seals in the coasts of Namibia

Author: Anday, Tekie T Date: 2005 The Analysis of variance is a robust technique whereby the total variation present in a set of data is partitioned into two or more components (Wayne, 1999). In this thesis, ANOVA was used to uncover the differences in goby length preyed on ... Read more
Assessing the conservation value of wetlands and waterbirds with a focus on the winter rainfall region of South Africa

Author: Harebottle, Douglas Michael Date: 2012 This thesis deals with the development and application of a new tool to assess the conservation significance of wetland avifauna. Termed the Waterbird Conservation Value (WCV) score, this method sums the proportion of each species' count ... Read more
The biology and conservation of the Damara Tern in Namibia

Author: Braby, Justine Date: 2011 The globally Near-threatened Damara Tern Sterna balaenarum is little known and faces several conservation issues. The aim of this study was to provide a description of the ecology and numbers of the species and discuss conservation management ... Read more
Breeding production of Cape gannets Morus capensis at Malgas Island, 2002-03

Author: Staverees, Linda Date: 2006 Includes bibliographical references. Read more
The Cape fur seal : monitoring and management in the Benguela Current ecosystem

Author: Kirkman, Stephen Patrick Date: 2010 At the root of this thesis was the Benguela Current Large Marine Ecosystem (BCLME) Programme’s project "Top Predators as Biological Indicators of Ecosystem Change in the BCLME" (LMR/EAF/03/02). The objectives of this project were to assess ... Read more
Citizen Science - building an early warning system for biodiversity

Author: Underhill, Les Date: 2012 Lecture series coordinated by Professor Les Underhill, Director, Animal Demography Unit, Department of Zoology, UCT. This lecture series studies a number of animal demography initiatives underway in South Africa, and highlights the ways in ... Read more c b d
Cold winters vs long journeys : adaptations of primary moult and body mass to migration and wintering in the Grey Plover Pluvialis Squatarola

Author: Serra, Lorenzo Date: 2002 The Grey Plover Pluvialis squatarola is a circumpolar breeding wader with a cosmopolitan winter distribution. Primary moult generally starts only when potential wintering sites are reached. Across the Palearctic-African region Grey Plovers ... Read more
Contributions to Linear Regression diagnostics using the singular value decompostion: Measures to Indentify Outlying Observations, Influential Observations and Collinearity in Multivariate Data

Author: Ramaboa, Kutlwano Date: 2010 Read more
The diet of the Cape fur seal Arctocephalus pusillus pusillus in Namibia : variability and fishery interactions

Author: Mecenero, Silvia Date: 2005 Includes bibliographical references. Read more
The effects of environment and niche on the distributions of dwarf chameleons, present and future

Author: Houniet, Darren Date: 2007 The niche and niche breadth of Dwarf Chameleons, Bradypodion, was assessed in terms of broad scale climatic factors. A niche-based modelling method was then used to construct present and future habitat suitability maps for 2050 and 2080, for ... Read more
The effects of oiling and rehabilitation on the breeding productivity and annual moult and breeding cycles of African penguins

Author: Wolfaardt, Anton Carl Date: 2007 Includes bibliographical references. Read more
The effects of prey availability on the endangered bank cormorant Phalacroxorax neglectus

Author: Botha, Philna Date: 2014 The bank cormorant Phalacrocorax neglectus is a seabird endemic to the south-western coast of southern Africa and the Benguela Upwelling System and has suffered a decline of more than 50% over three generations. Main threats include displacement ... Read more
The effects of white shark presence on the behaviour of Cape fur seals at Geyser Rock, Gansbaai, South Africa

Author: Wcisel, Michelle Date: 2013 Predators and the risk associated with their presence may affect group composition, group size, movement patterns, and habitat use of prey species. The removal of predators, or their reintroduction following long periods of absence, equally ... Read more
The endangered bank cormorant Phalacrocorax neglectus: the heat is on : understanding the effect of climate change and associated environmental variable changes on the breeding biology and population dynamics of the bank cormorant in the W. C., S. A

Author: Meyer,Corlia Date: 2014 The bank cormorant Phalacrocorax neglectus was listed as ‘Endangered’ in 2004, following a decrease of more than 60% in the total population from 1975-2011. It ranges from central Namibia to the Western Cape, South Africa, with most of the ... Read more
Energy budget and foraging behaviour of the Cape gannet Morus capensis during the breeding season

Author: Navarro-Canas, Rene Alfredo Date: 2010 This thesis deals with the energy expenditure of free-ranging Cape gannets Morus capensis breeding at Malgas Island, South Africa. I sought to determine the energy budget of family units and to extrapolate this to the whole population. Energy ... Read more
Evaluating a citizen science research programme : understanding the people who make it possible

Author: Wright, Dale Date: 2011 Citizen science is increasingly recognised as a useful tool for conducting scientific research and public outreach, producing multiple positive benefits for biodiversity conservation and the volunteers involved in such research. Read more

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