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Evaluating cape honey bee sperm quality and the in vitro effect of miticides on sperm functionality and structure
(University of Western Cape, 2021)
Apis mellifera (honey bees) are essential pollinators and thus considered a keystone species. Reproductive success is therefore important to the survival of the species, with drone sperm quality playing a vital role in ...
Hyperactivation in human semen and sperm subpopulations by selected calcium modulators
(University of the Western Cape, 2014)
A functional sperm is critical for successful fertilization in order to deliver an intact genome to the site of fertilization. It is often characterized by high motility and normal morphology. Moreover, sperm hyperactivated ...
Sperm mitochondria: species specificity and relationships to sperm morphometric features and sperm function in selected mammalian species
(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 ...
Seasonal differences in semen characteristics and sperm functionality in Tankwa goats
(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 ...
Evaluation of sperm functionality in non-human primates, focussing on sperm capacitation
(University of the Western Cape, 2019)
The incidence of male infertility is increasing, with up to 50% of infertile males having “unexplained” (idiopathic) infertility. Newly developed molecular techniques have great value in detecting subtle causes of male ...
Aspects of the reproduction of male and female African penguins (Spheniscus demersus) with special reference to sperm biology and cryopreservation
(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 ...
Sperm function in different human sperm subpopulations
(University of the Western Cape, 2022)
Human semen contains a heterogenous population of spermatozoa of which only a
certain fraction is physiologically suitable for fertilization. Functional characteristics of these
subpopulations and sperm separation ...