Browsing Faculty of Natural Science by Author "van der Horst, Gerhard"
Now showing items 1-8 of 8
-
Apoptotic markers in ejaculated human spermatozoa
Brooks, Nicole Lisa (University of the Western Cape, 2005)The role of male germ cell death in spermatogenesis is an important one as it removes dysfunctional or genetically damaged germ cells and is necessary to maintain an optimal germ cell to Sertoli cell ratio. The formation ... -
Aspects of the reproduction of male and female African penguins (Spheniscus demersus) with special reference to sperm biology and cryopreservation
Mafunda, Patrick Siyambulela (University of the Western Cape, 2018)In the marine environment, penguins have been described as curators and serve a critical role in ecological balance. The African penguin (Spheniscus demersus) has undergone a rapid population decline, mainly due to ... -
The effect of gonadotropin-releasing hormones (GnRH) I & II on sperm motility and acrosome status of the Vervet monkey (Chlorocebus aethiops) in vitro
De Villiers, Charon (University of the Western Cape, 2006)Gonadotropin Releasing Hormone (GnRH) is a hypothalmic decapeptide, which regulates mammalian gonadotropin secretions by binding to specific, high affinity receptors in the pituitary. Two forms of GnRH (GnRH I and GnRH II) ... -
The influence of nicotine exposure on the male reproductive system
Naidu, Thulasimala (University of the Western Cape, 1993)It is well documented that cigarette smoking and nicotine exposure create widespread physiological disorders in humans and animals. The primary tobacco constituent that is responsible for the toxicological consequences ... -
Seasonal differences in semen characteristics and sperm functionality in Tankwa goats
Ngcauzele, Asanele (University of the Western Cape, 2018)Tankwa goats have been free-ranging in the Tankwa Karoo National Park in the Northern Cape for more than 80 years. A genetic study concluded that these feral goats are a unique genetic resource compared to other goat breeds ... -
Semen characteristics of free-ranging African elephants (Loxodonta africana) and Southern white rhinoceros (Ceratotherium simum simum) using Computer-aided sperm analysis, Electron microscopy and Genomics as diagnostic tools
Luther, Ilse (University of the Western Cape, 2016)The survival of free-ranging (in situ) African elephant and Southern white rhinoceros populations are currently being challenged on a daily basis in Africa. Reproductive health is considered a vital component of species ... -
Sperm mitochondria: species specificity and relationships to sperm morphometric features and sperm function in selected mammalian species
Maree, Liana (University of the Western Cape, 2011)Numerous studies on mammalian spermatozoa have reported large variations in the dimensions of the main sperm structural components, namely the head, midpiece and flagellum. These variations in sperm architecture are believed ... -
The structure of the reproductive system in the male vervet monkey, chlorocebus aethiops, with special reference to spermatogenesis
Lebelo, Sogolo Lucky (2007)The vervet monkey, Chlorocebus aethiops, an Old World monkey, has been often used in biomedical research programs (toxicological studies and fertility) because of the inaccessibility of relevant human tissues. Data from ...