OpenUCT Home
→
Browsing by Author

Browsing by Author "Jacobs, David S"

Now showing items 21-31 of 31

Population genetics of the Cape serotine bat (Neoromicia capensis) in South Africa

Author: Shackleton, Andrew Leonard Date: 2005 The Cape serotine bat (Chiroptera: Vespertilionidae) is an endemic species of sub-Saharan Africa and occupies all biomes throughout its distribution. It roosts in anthropogenic structures in small colonies of up to ten individuals. Since its ... Read more
The relationship between niche breadth and geographic range size in African Horseshoe bats (Rhinolophidae, Chiroptera)

Author: Aronson, Jonathan Date: 2011 According to Brown's hypothesis, generalists have high niche breadth and can tolerate a wide variety of environmental conditions resulting in large geographic range sizes. Conversely, specialists have low niche breadth and small range sizes. ... Read more
The relative influence of competition and coevolution on the community structure of insectivorous bats in Southern Africa

Author: Schoeman, M Corrie Date: 2006 Biotic filters rather than abiotic filters should influence the community structure of animals such as insectivorous bats with life histories characterized by low fecundity. low predation risk. long life expectancy, and stable populations. I ... Read more
The relative influence of competition and prey defenses on the phenotypic structure of insectivorous bat ensembles in southern Africa

Author: Schoeman, M Corrie ; Jacobs, David S Date: 2008 Deterministic filters such as competition and prey defences should have a strong influence on the community structure of animals such as insectivorous bats that have life histories characterized by low fecundity, low predation risk, long life ... Read more c b
Retinoic acid-independent expression of Meis2 during autopod patterning in the developing bat and mouse limb

Author: Mason, Mandy K ; Hockman, Dorit ; Curry, Lyle ; Cunningham, Thomas J ; Duester, Gregg ; Logan, Malcolm ; Jacobs, David S ; Illing, Nicola Date: 2015 BackgroundThe bat has strikingly divergent forelimbs (long digits supporting wing membranes) and hindlimbs (short, typically free digits) due to the distinct requirements of both aerial and terrestrial locomotion. During embryonic development, ... Read more
The role of echolocation in communication in a high duty cycle echolocating bat, Rhinolophus clivosus (Chiroptera: Rhinolophidae): an experimental approach

Author: Raw, Robert Date: 2016 Acoustic communication plays a pivotal role in species recognition across a number of taxa. Species must therefore maintain discrete acoustic signatures to facilitate communication and avoid misidentification. The Acoustic Communication ... Read more
Sensory divergence among populations of a southern African endemic horseshoe bat (Chiroptera: Rhinolophidae ): a multidisciplinary approach

Author: Odendaal, Lizelle Janine Date: 2015 A fundamental goal of evolutionary biology is to understand how natural selection, random genetic drift and gene flow interact to promote adaptive trait divergence within species. Environmental gradients are ideal opportunities for disentangling ... 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
Sensory trait variation in an echolocating bat suggests roles for both selection and plasticity

Author: Odendaal, Lizelle J ; Jacobs, David S ; Bishop, Jacqueline M Date: 27 Mar 2014 Background: Across heterogeneous environments selection and gene flow interact to influence the rate and extent of adaptive trait evolution. This complex relationship is further influenced by the rarely considered role of phenotypic plasticity ... Read more c b
Skeletal element elongation and interdigital tissue regression in developing bat limbs: a gene expression analysis

Author: Mason, Mandy K Date: 2016 Vertebrate limbs classically illustrate the morphological diversity of homologous structure. Bat limbs exemplify this, having strikingly divergent limbs: wings with asymmetrically elongated digit elements, supporting expansive membranes; and ... Read more
To seek or speak? Dual function of an acoustic signal limits its versatility in communication

Author: Finger, Nikita M ; Bastian, Anna ; Jacobs, David S Date: 2017 The perception of different attributes of conspeciﬁcs is an integral part of intraspeciﬁc communication. It can facilitate the recognition of interaction partners or the assessment of potential mates. Acoustic signals can encode ﬁne-scaled ... Read more c b n d