Browsing by Author "Hofmeyr, Margaretha D."
Now showing items 1-8 of 8
-
Accurate automated quantitative imaging of tortoise erythrocytes using the NIS image analysis system
Walton, S.; Hofmeyr, Margaretha D.; van der Horst, Gerhard (Taylor & Francis, 2013)The standard method for assessing blood cell characteristics using an ocular micrometer is time-consuming and limited. We used the Nikon NIS Elements imaging software and May-Grünwald-Giemsa staining to determine whether ... -
Body of evidence: forensic use of baseline health assessments to convict wildlife poachers
Henen, Brian T.; Hofmeyr, Margaretha D.; Baard, Ernst H. W. (CSIRO Publishing, 2013)CONTEXT. Given the immense impact of wildlife trade, disease and repatriations on populations, health assessments can" "provide powerful forensic material to help convict wildlife poachers and minimise risks of releasing ... -
How many species of angulate tortoises occur in Southern Africa? (Testudines: Testudinidae: Chersina)
Hofmeyr, Margaretha D.; Spitzweg, Cäcilia; Vamberger, Melita (Wiley-Blackwell, 2020)Using range-wide sampling and 1,143 bp of mtDNA (cytochrome b gene) and 14 microsatellite loci, we examined genetic differentiation in the widely distributed Southern African angulate tortoise (Chersina angulata). We found ... -
In quest of contact: phylogeography of helmeted terrapins (Pelomedusa galeata, P. subrufa sensu stricto)
Vamberger, Melita; Hofmeyr, Margaretha D.; Ihlow, Flora; Fritz, Uwe (PeerJ, 2018)Based on rangewide sampling and three mitochondrial and two nuclear markers (together up to 1,850 bp and 1,840 bp, respectively), we examine the phylogeography of two helmeted terrapin species (Pelomedusa galeata and P. ... -
Population ecology of Psammobates oculifer in a semi-arid environment
Keswick, Toby; Hofmeyr, Margaretha D. (Taylor & Francis and UNISA Press, 2013)We studied the ecology of Psammobates oculifer over 13 months near Kimberley, South Africa, to ascertain if the population’s life history traits conform to chelonian patterns in arid environments. Capture rates were highest ... -
Too hot to nest? In a hot summer the tortoise Chersina Angulata can switch from nesting to facultative viviparity
Kuchling, Gerald; Hofmeyr, Margaretha D. (Frontiers Media, 2022)In a captive colony of Chersina angulata in Cape Town, South Africa, we observed in 2015/16 retention of the last egg clutch inside the female until the hatching stage was reached, conforming to the generally accepted ... -
Unraveling the diversification and systematic puzzle of the highly polymorphic Psammobates tentorius (Bell, 1828) complex (Reptilia: Testudinidae) through phylogenetic analyses and species delimitation approaches
Hofmeyr, Margaretha D.; Zhao, Zhongning; Heideman, Neil J.L. (Wiley-Blackwell, 2020)The high level of phenotypic diversity in southern African tent tortoises (Psammobates tentorius complex) has for decades prevented systematists from developing a stable taxonomy for the group. Here, we used a comprehensive ... -
Variation in the daily activity, movement and refugia of Critically Endangered geometric tortoises, Psammobates geometricus, in autumn and spring
Henen, Brian T.; van Bloemestein, Ulric P.; Hofmeyr, Margaretha D.; Weatherby, Craig A. (Taylor & Francis, 2017)To help assess habitat requirements of Critically Endangered geometric tortoises, we used thread-trailing to measure daily activity, movements and refugia of adult Psammobates geometricus in autumn and spring 2002. We found ...