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Browsing by Author "Ryan, Peter"

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Assessing sea turtle, seabird and shark bycatch in artisanal, semi-industrial and industrial of fisheries in the Cabo Verde Archipelago

Author: Montrond, Gilson Date: 2020 Firstly, I am very grateful to Birdlife International for the MSc scholarship. I am also very grateful to Professor Peter Ryan of the FitzPatrick Institute of African Ornithology, University of Cape Town, for agreeing to supervise this project ... Read more
Assessing the effect of feather wear on carbon and nitrogen stable isotope ratios, and the use of stable isotopes to determine predator diets in the Namibian Islands marine protected area

Author: Johnson, Laurie Date: 2019 The stable isotope (SI) approach is widely used in ecological research to tackle problems such as delineating food web structure or tracing the migratory origins of various organisms. This thesis first tested the widely accepted assumption ... Read more
The ecology, genetics and conservation of a translocated population of Cnemidophorus Vanzoi (Teiidae) on Praslin Island, St. Lucia

Author: Dickinson, Hannah Christiana Date: 2000 This study investigates the colonisation of Praslin Island by C. vanzoi, three years after the translocation event. An examination of habitat use, lizard abundance, distribution and population genetics was conducted and population comparisons ... Read more
Exploring South Africa’s southern frontier: A 20-year vision for polar research through the South African National Antarctic Programme

Author: Ansorge, Isabelle J ; Skelton, Paul ; Bekker, Annie ; de Bruyn, P J Nico ; Butterworth, Doug S ; Cilliers, Pierre ; Cooper, John ; Cowan, Don A ; Dorrington, Rosemary ; Fawcett, Sarah ; Fietz, Susanne ; Findlay, Ken P ; Froneman, P William ; Grantham, Geoff H ; Greve, Michelle ; Hedding, David ; Hofmeyr, G J Greg ; Kosch, Michael ; le Roux, Peter ; Lucas, Mike ; MacHutcho, Keith ; Meiklejohn, Ian ; Nel, Werner ; Pistorius, Pierre ; Ryan, Peter ; Stander, Johan ; Swart, Sebastiaan ; Treasure, Anne ; Vichi, Marcello ; Jansen van Vuuren, Bettine Date: Jun 2017 Antarctica, the sub-Antarctic islands and surrounding Southern Ocean are regarded as one of the planet’s last remaining wildernesses, ‘insulated from threat by [their] remoteness and protection under the Antarctic Treaty System’1 . Antarctica ... Read more c b
Fine-scale drivers of African Penguin prey dynamics in Algoa Bay, South Africa, and their impacts on penguin foraging ecology

Author: Mcinnes, Alistair McIntyre Date: 2016 African Penguins (Spheniscus demersus) have undergone a dramatic decrease in their population since the turn of this century prompting the up-grading of their conservation status to 'endangered'. There is growing evidence that variation in ... Read more
Influence of ecosystem variability on the demography and reproductive performance of two Eudyptes penguins, Macaroni and Eastern Rockhopper Penguins, at sub-Antarctic Marion Island, 1994–2019

Author: Dakwa, Farisayi E Date: 2022 Penguins are among the most important avian predators in the Southern Ocean, consuming large amounts of prey. Macaroni Penguins Eudyptes chrysolophus and Eastern Rockhopper Penguins E. filholi are listed as Vulnerable due to large-scale ... Read more
Quantifying land-based sources of plastic pollution in South Africa

Author: Weideman, Eleanor A Date: 2020 It is widely claimed that at least 80% of the plastic litter entering marine environments comes from land-based sources, yet there is little empirical evidence to support this. Most studies to date predict the flux of litter from land to sea ... Read more
Rupturing the terrain vague

Author: Ho-Tong M Date: 2011 This thesis started with the above statement made by Jean Nouvel in conversation with Jean Baudrillard on the metamorphosis of architecture. This project set out as both a manifestation of the above philosophy, using it as an approach towards ... Read more
Seasonal and long-term change in the abundance, accumulation and distribution of beach litter within Table Bay, Cape Town, South Africa

Author: Opie, Brandon Date: 2021 There is growing global concern with regard to the pollution of the world's ocean, particularly by marine debris and plastics. The daily accumulation rates of stranded beach litter were measured at two sites within Table Bay, repeating similar ... Read more
Survival and reproduction in a biennially-breeding seabird : the Wandering Albatross

Author: Vincent, Zachariah David Date: 2008 I studied a long-term data set for Wandering Albatrosses Diomedea exulans collected at sub-Antarctic Marion Island to investigate adult survival, breeding biology and factors affecting reproductive success of this long-lived pelagic seabird. ... Read more
The movement and landscape use of Blue Cranes in the Western Cape

Author: Davis, Sydney Pierce Date: 2018 The Western Cape population of Blue Cranes (Anthropoides paradiseus) is the largest and most stable population for the species. The population is primarily threatened by high mortality due to collisions with power-lines and the development ... Read more
Tracking African penguins (Spheniscus demersus) outside of the breeding season: Regional effects and fishing pressure during the pre-moult period

Author: Harding,Craig Thomas Date: 15 Aug 2014 African penguins (Spheniscus demersus) have experienced a 60% population decline in the past 30 years due to an eastward shift in the relative abundance of their main food source, anchovy (Engraulis encrasicolus ) and sardine (Sardinops sagax). ... Read more
Understanding moult patterns in Albatrosses and Petrels breeding on Marion and Gough Islands

Author: Osborne, Alexis Date: 2020 Moult is an energetically demanding process for birds, and the replacement of flight feathers impacts flight performance. As a result, few birds overlap moult with other key activities such as breeding or migrating. Feather growth rates show ... Read more
The Vulnerability of the Coast of Liberia to Marine Oil Spills: Implications for Biodiversity and Renewable Natural Resource Utilization

Author: Tuagben,Darlington Saykay Date: 2012 The West African coastline has become a "hotspot" for oil production, and 17 oil exploration blocks have been designated off the Liberian coast. Liberia's 579 km coastal zone supports almost 60% of the country's human population and is endowed ... Read more