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Browsing by Author "Winker, Henning"

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Environmental correlates of geographic divergence in a phenotypic trait: A case study using bat echolocation

Author: Maluleke, Tinyiko ; Jacobs, David S ; Winker, Henning Date: 28 Jun 2017 Divergence in phenotypic traits may arise from the interaction of different evolutionary forces, including different kinds of selection (e.g., ecological), genetic drift, and phenotypic plasticity. Sensory systems play an important role in ... Read more c b
Fishery, population dynamics and stock assessment of geelbek (Atractoscion aequidens), a commercially important migrant fish species off the coast of South Africa

Author: Boyd, Danielle Winona Date: 2018 Geelbek (Atractoscion aequidens) is an important fish species in South Africa's linefishery, a fishing sector defined by its fishing gear of rod and reel or handline. Distributed from Cape Point (34°21'S, 18°29'E) on the south west coast to ... Read more
Geographic variation in the phenotype of an African horseshoe bat species, Rhinolophus damarensis, (Chiroptera: Rhinolophidae)

Author: Maluleke, Tinyiko Date: 2018 Studies involving geographic variation in the phenotypes of bats help scientists to explain why these mammals are the most species rich mammalian order second only to rodents, with well more than 1 300 species occurring worldwide. Such species ... Read more
Geographic variation in the phenotypes of two sibling horseshoe bats Rhinolophus simulator and R.swinnyi

Author: Mutumi, Gregory L Date: 2016 The study of geographic variation and its causes in the phenotypes of animals elucidates how evolutionary processes generate biodiversity. This thesis attempts to uncouple the relative contributions of adaptive and neutral mechanisms to ... Read more
The influence of environmental variables on the presence of white sharks, Carcharodon carcharias at two popular Cape Town bathing beaches: A generalized additive mixed model

Author: Weltz, Kay ; Kock, Alison A ; Winker, Henning ; Attwood, Colin ; Sikweyiya, Monwabisi Date: 2013 Shark attacks on humans are high profile events which can significantly influence policies related to the coastal zone. A shark warning system in South Africa, Shark Spotters , recorded 378 white shark ( Carcharodon carcharias ) sightings at ... Read more c b
Life history traits that predispose South African linefishes to overexploitation

Author: Haupt, Meghan Date: 2018 Globally, the status of many fish stocks remains unknown, of which the majority fall under data-limited small-scale fisheries. Management decisions in most of these fisheries are difficult due conflicting objectives and views from fisheries ... Read more
Predictors of white shark Carcharodon carcharias presence at two recreational beaches in a major metropole

Author: Loosen, Kristina Date: 2017 The presence of white sharks Carcharodon carcharias in False Bay, South Africa follows a clear seasonal cycle. In the austral winter months, white sharks aggregate around Seal Island with female sharks in particular moving to the inshore areas ... Read more
Sensory drive mediated by climatic gradients partially explains divergence in acoustic signals in two horseshoe bat species, Rhinolophus swinnyi and Rhinolophus simulator

Author: Mutumi, Gregory L ; Jacobs, David S ; Winker, Henning Date: 2016 Geographic variation can be an indicator of still poorly understood evolutionary processes such as adaptation and drift. Sensory systems used in communication play a key role in mate choice and species recognition. Habitat-mediated (i.e. ... Read more c b