Publications

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records of the bont tick, amblyomma hebraeum, from the angulate tortoise, chersina angulata, and the leopard tortoise, geochelone pardalis.a. hebraeum nymphae were found on 4 angulate tortoises and 13 leopard tortoises in the addo elephant national park, eastern cape province. adults of this species were collected for the 1st time from a leopard tortoise in the mkuze game reserve, natal. the significance of this finding, in relation to the normal host preferences of this tick, is briefly discussed.19846533508
parasites of domestic and wild animals in south africa. xlvii. ticks of tortoises and other reptiles.a total of 586 reptiles, belonging to 35 species and five subspecies, were examined in surveys aimed at determining the species spectrum and geographic distribution of ticks that infest them. of these reptiles 509 were tortoises, 28 monitor or other lizards, and 49 snakes. nine ixodid tick species, of which seven belonged to the genus amblyomma, and one argasid tick, ornithodoros compactus were recovered. seven of the ten tick species are parasites of reptiles. amongst these seven species amblyo ...200617058444
a redescription of haemogregarina fitzsimonsi dias, 1953 and some comments on haemogregarina parvula dias, 1953 (adeleorina: haemogregarinidae) from southern african tortoises (cryptodira: testudinidae), with new host data and distribution records.blood films were examined from 154 wild and captive tortoises from four provinces of south africa, including gauteng, kwazulu-natal, north west and western cape. the five species ofchelonians studied were chersina angulata (schweigger), kinixys belliana belliana (gray), k. lobatsiana power, k. natalensis hewitt, and stigmochelys pardalis (bell). two species of haemogregarines, previously reported from mozambique, were identified in blood films, namely haemogregarina fitzsimonsi dias, 1953 and ha ...200919827360
a novel herpesvirus of the proposed genus chelonivirus from an asymptomatic bowsprit tortoise (chersina angulata).a wild-caught bowsprit tortoise (chersina angulata) was received into quarantine and appeared clinically normal. oral swabs for consensus herpesvirus polymerase chain reaction (pcr) and sequencing were obtained during routine quarantine, and a novel herpesvirus was identified. comparative sequence analysis shows that this virus is a member of the subfamily alphaherpesvirinae in the proposed genus chelonivirus. host/virus co-evolution appears to be common amongst herpesviruses and their hosts, an ...201020597234
hemoproteids (apicomplexa: haemoproteidae) from south african tortoises (cryptodira: testudinidae).terrestrial tortoises, chersina angulata (schweigger, 1812), kinixys belliana belliana gray, 1831, k. lobatsiana power, 1927, k. natalensis hewitt, 1935, and stigmochelys pardalis (bell, 1828), both wild (n  =  84) and captive (n  =  70), were examined for hematozoans from the provinces of gauteng, kwazulu-natal, north west, and western cape, south africa. in giemsa-stained blood films, 2 species of hemoproteids were identified, 1 previously described, that is, haemoproteus testudinalis ( lavera ...201021158631
parasites of domestic and wild animals in south africa. li. ticks infesting leopard tortoises <i>stigmochelys pardalis</i>, hingeback tortoises <i>kinixys zombensis</i> and angulate tortoises <i>chersina angulata</i>.the objective of the study was to record the tick species collected from three species of tortoise, each in a different province of south africa. ticks were collected from leopard tortoises, stigmochyles pardalis, in the southern region of the kruger national park, mpumalanga province; from hingeback tortoises, kinixys zombensis, in the enseleni nature reserve, kwazulu-natal province and from angulate tortoises, chersina angulata, in the west coast national park, western cape province. of the 63 ...201728281776
detection of testudinid herpesvirus type 4 in a leopard tortoise (stigmochelys pardalis).several animals from a mixed species collection of tortoises in germany died unexpectedly. some of the affected leopard tortoises (stigmochelys pardalis) from this group showed respiratory signs. samples were collected from one of the ill tortoises, and a mycoplasma spp. and a herpesvirus were detected by pcr. sequencing of a portion of the dna polymerase gene of the herpesvirus showed 99% identity with testudinid herpesvirus 4, previously described only once in a bowsprit tortoise (chersina ang ...201627301060
intranuclear coccidiosis in tortoises: nine cases.chelonian intranuclear coccidiosis has been reported once, in two radiated tortoises (geochelone radiata), and is apparently rare. we describe intranuclear coccidiosis diagnosed histologically in two radiated tortoises, three travancore tortoises (indotestudo forstenii), two leopard tortoises (geochelone pardalis), one bowsprit tortoise (chersina angulata), and one impressed tortoise (manouria impressa). infection was systemic and involved alimentary, urogenital, respiratory, lymphoid, endocrine ...200616672578
nutritional values of tortoises relative to ungulates from the middle stone age levels at blombos cave, south africa: implications for foraging and social behaviour.the site of blombos cave (bbc), western cape, south africa has been a strong contributor to establishing the antiquity of important aspects of modern human behaviour, such as early symbolism and technological complexity. however, many linkages between middle stone age (msa) behaviour and the subsistence record remain to be investigated. understanding the contribution of small fauna such as tortoises to the human diet is necessary for identifying shifts in overall foraging strategies as well as t ...201424423785
long bone histology of chersina angulata : interelement variation and life history data.the current study deduced the growth pattern and lifestyle habits of chersina angulata based on bone histology and cross-sectional geometry of limb bones. femora, humeri, and tibiae of seven different-sized individuals representing different ontogenetic stages were assessed to determine the interelement and intraskeletal histological variation within and among the tortoises. the bone histology of adult propodials consists of a highly vascularized, uninterrupted fibrolamellar bone tissue with a w ...201931674707
living with the genetic signature of miocene induced change: evidence from the phylogeographic structure of the endemic angulate tortoise chersina angulata.the phylogeographic structure of the monotypic endemic southern african angulate tortoise chersina angulata was investigated throughout its distribution with the use of partial sequences from three mtdna loci (coi, cyt b and nd4). phylogeographic and phylogenetic structuring obtained for the three mtdna markers were highly congruent and suggested the presence of two genetically distinct, reciprocally monophyletic evolutionary lineages. group one contained two subclades with haplotypes from the n ...200717936644
viewing chelonian reproductive ecology through acoustic windows: cranial and inguinal perspectives.ultrasonography is a powerful new tool in reproductive physiology and ecology but quantitative evaluations of acoustic window efficacies are necessary to assess methodological accuracy. we evaluated the efficacy of the left inguinal, right inguinal and cranial acoustic windows for detecting ovarian follicles and oviducal eggs in three tortoise species. incorporating cranial results improved upon inguinal efficacies for detecting follicles in the three species, and for detecting eggs in chersina ...200312911116
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