African Journal of Herpetology最新文献

{"title":"Long-term field study of the behaviour of Xenopus laevis (Pipidae) in a small dam","authors":"A. Elepfandt, A. Gutsche, W. Fischer, W. Leujak, P. Bishop","doi":"10.1080/21564574.2021.1998234","DOIUrl":"https://doi.org/10.1080/21564574.2021.1998234","url":null,"abstract":"ABSTRACT A study of the behaviour of Xenopus laevis in a small dam in South Africa was continued annually from 1992 until 1999. All individuals were tagged. The annual number of frogs varied between 22 and 109 by migration. The sex ratio remained balanced. Most subadults stayed for just one season, whereas half of the adults remained longer. Some individuals reappeared after one or more years of absence. Within a season, male activity was concentrated in series of nights between quiet periods. Higher population density did not result in more territorial, stationary, or roaming males, or more fighting, but mainly in a higher number of inactive males. Fighting was intense, however, at extreme low water in 1995. Territorial males might maintain their territory in subsequent years. The size of individuals did not differ between behavioural types and males of any behaviour could mate successfully. The rare matings aggregated in adjacent nights at peak calling. Female approach to males was not seen, but playback in silent nights caused some females to linger near the loudspeaker. Females that experienced no amplexus during our observations were found significantly more in the shallow areas of the dam where sound did not enter. For mating, females accepted only males larger than 65 mm SVL and repelled all smaller ones. Mating was not size assortative. In both sexes, maturation took years of gradual development before successful mating.","PeriodicalId":49247,"journal":{"name":"African Journal of Herpetology","volume":"71 1","pages":"51 - 71"},"PeriodicalIF":1.5,"publicationDate":"2022-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42474491","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Current-day distribution of the rinkhals (Hemachatus haemachatus) in central South Africa and Lesotho: An evaluation based mainly on photographic and videographic records from social media","authors":"M. Bates, Cora S. Stobie","doi":"10.1080/21564574.2021.1998237","DOIUrl":"https://doi.org/10.1080/21564574.2021.1998237","url":null,"abstract":"ABSTRACT The rinkhals (Hemachatus haemachatus) is a well-known venomous elapid found in greater South Africa and the eastern highlands of Zimbabwe. To evaluate its current-day (mostly 2012–2021) distribution in central South Africa and Lesotho, we examined various media sources, including Facebook, for photographic and videographic records. Records were posted or shared to a Facebook group Free State Reptiles and Amphibians (including adjacent areas and Lesotho) and saved electronically for future reference. In total we accumulated 208 Facebook records for 152 unique localities. Several localities were vague or broad, and therefore most of the original submitters of records were contacted in an attempt to confirm or refine them. Of the 139 individuals contacted, 68 (49%) responded regarding 96 records and they either confirmed the given locality names, could not add to the information, or refined them. In total, 131 (63%) of the 208 Facebook records were confirmed/verified and were thus usable for plotting on maps. The 131 records represent 86% of all verified media records, whereas only 14% (21 records) are from platforms such as iNaturalist, iSpot and ReptileMAP. All verified media records, together with literature and unpublished museum records, were plotted on a map. Our evaluation, based on verified records, showed that the rinkhals still occurs widely in the northern, central and eastern Free State Province, and several new records extend its known range westwards in central South Africa. New records indicate that it still occurs in western Lesotho, as well as the Maluti Mountains in the north of this country. Our study is the first to make extensive use of Facebook records for evaluating the distribution of a southern African reptile. We contend that a large body of photographic and videographic records for reptiles and amphibians exists on social networking sites, such as Facebook, and proper evaluation and documentation of these records can contribute significantly to knowledge of present-day species distributions.","PeriodicalId":49247,"journal":{"name":"African Journal of Herpetology","volume":"71 1","pages":"94 - 100"},"PeriodicalIF":1.5,"publicationDate":"2021-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43713505","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Biodiversity hotspot revisited: reptile and amphibian assemblages of the Uluguru Mountain Forest Reserves, south-eastern Tanzania","authors":"F. J. Mkonyi","doi":"10.1080/21564574.2021.1973582","DOIUrl":"https://doi.org/10.1080/21564574.2021.1973582","url":null,"abstract":"ABSTRACT Although the knowledge about the Tanzanian reptiles and amphibians has drastically increased in recent years, the knowledge on the amphibian and reptile fauna of the remaining forest reserves of the Uluguru Mountains (UMs) is only partially known. Amphibians and reptiles were studied in 17 forest reserves and sampled using diurnal and nocturnal time-constrained visual encounter surveys, acoustic surveys and opportunistic searches. A total of 51 quadrats of 25 × 25 m were randomly established on the forest floor, totalling 459 person-hours of sampling effort. Overall, 54 herpetofauna species (27 amphibian and 27 reptile species) were recorded from the area, including two anurans and seven reptile species, which are new records for the region. The estimated Chao1 species richness for the study region was 51 for amphibians and 76 for reptiles. Amphibian and reptile species composition did not differ significantly across the forest reserves, but similarities in species composition of different levels were evident across the reserves. For both communities, α-diversity and relative abundance did not vary significantly across the reserves. Based on multiple regression analyses, leaf-litter anuran species richness was positively influenced by percentage canopy cover, whereas abundance was negatively influenced by total fragment size. Partial correlations showed that variation in leaf-litter anuran abundance was explained by relative humidity, percentage canopy cover and soil moisture, while controlling for altitude. Percentage canopy cover was also the best predictor of species richness of leaf-litter anurans. Overall, these findings highlight the importance of protecting the UMs forest reserves for herpetofauna conservation.","PeriodicalId":49247,"journal":{"name":"African Journal of Herpetology","volume":"70 1","pages":"95 - 122"},"PeriodicalIF":1.5,"publicationDate":"2021-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49322995","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Bone-by-bone: A detailed skull description of the White-headed dwarf gecko Lygodactylus picturatus (Peters, 1870)","authors":"J. Lobón-Rovira, A. Bauer","doi":"10.1080/21564574.2021.1980120","DOIUrl":"https://doi.org/10.1080/21564574.2021.1980120","url":null,"abstract":"ABSTRACT The Lygodactylus genus is one of the most species-rich genera of gekkonid lizards in Africa. It is one of relatively few exclusively diurnal geckos’ lineages and its members include some of the smallest gekkonids. Osteological features within Lygodactylus have never been addressed in detail. We here provide a detailed bone-by-bone skull description of Lygodactylus picturatus to expand the knowledgebase on gecko cranial structure. High-Resolution X-ray Computed Tomography (HRCT) has been used, followed by bone-by-bone segmentation and description. As expected, L. picturatus presents some modifications on the basic gekkotan plan due to miniaturisation, such as an increase in the overlap area of the muzzle unit and lost or reduction of jugal bone. In addition, the skull of this species is characterised by the absence of the squamosal, fused nasals, reduced postorbitofrontal bone and extremely rounded parietal bones. Finally, we observed a reduction of the orbital space, in comparison with other miniaturised gekkotans, presumably as a consequence of their diurnal behaviour and niche preference.","PeriodicalId":49247,"journal":{"name":"African Journal of Herpetology","volume":"70 1","pages":"75 - 94"},"PeriodicalIF":1.5,"publicationDate":"2021-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47368967","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A comparison of calcium and phosphorus in components of fertile and size-matched unbanded Nile crocodile eggs","authors":"G. Brown, P. Forbes, J. Myburgh, J. Nöthling","doi":"10.1080/21564574.2021.1980119","DOIUrl":"https://doi.org/10.1080/21564574.2021.1980119","url":null,"abstract":"ABSTRACT Research in other species suggests that the source of embryonic calcium (Ca) and phosphorus (P) for Crocodylus niloticus is likely yolk and shell. Using inductively coupled plasma optical emission spectroscopy (ICP-OES), the Ca and P concentration and content of 30 fertile eggs was determined within 10 days prior to anticipated hatching, and compared with those of size-matched unbanded eggs (eggs that failed to form an opaque band around the lesser circumference, indicative of presumed infertility). Shell contained the highest Ca concentration and content, followed by the foetus, followed by the intra-abdominal yolk. Foetal tissue had the highest P concentration and content, followed by intra-abdominal yolk. The Ca and P concentration of intra-abdominal yolk of foetuses in fertile eggs varied more widely than did the yolk of unbanded eggs, based on coefficient of variation. Ca concentration of fertile egg yolk was in some cases found to exceed that of the yolk of unbanded eggs, suggesting that Ca is stored there after being removed from the shell, however, yolk Ca content was consistently lower in fertile than in unbanded eggs, indicating net yolk Ca depletion. Yolk P concentration and content of fertile eggs was consistently lower than that of unbanded eggs, suggesting a net depletion of yolk P reserves, without replenishment. The Nile crocodile appears to follow the classic archosaurian pattern of Ca mobilisation, whereby the shell supplies the majority of foetal Ca, but the intra-abdominal yolk contains substantial Ca reserves for use by the hatchling. This study provides clinicians and researchers with information on sample collection and analysis of Nile crocodile egg and foetal tissue, provides baseline descriptive data on Ca and P concentration and content, discusses the effect of potential covariates on Ca and P concentration and content, and discusses the movement of Ca and P from reserves within the egg to the developing foetus.","PeriodicalId":49247,"journal":{"name":"African Journal of Herpetology","volume":"70 1","pages":"139 - 154"},"PeriodicalIF":1.5,"publicationDate":"2021-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47355947","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Distribution, ecology, and conservation of Philochortus zolii in Mauritania: implications for the long-term persistence of an endangered lizard","authors":"Marisa Naia, A. S. Sow, João C. Campos, Zeine El Abidine Sidatt, J. Brito","doi":"10.1080/21564574.2021.1980121","DOIUrl":"https://doi.org/10.1080/21564574.2021.1980121","url":null,"abstract":"ABSTRACT Philochortus zolii is a globally endangered lizard known only from five localities scattered across North Africa. The population is thought to be decreasing, but there are almost no data about this Sahara-Sahel endemic lizard. Recently, a sixth population was found in Mauritania, at the coastal peripheral zone of the Diawling National Park, which constitutes a remarkable opportunity to gather ecological information for the first time and to plan conservation actions. Here we assess the P. zolii regional distribution in Mauritania, estimate population abundance, analyse the species activity patterns, characterise the occupied habitats, assess local threats, evaluate the national conservation status, and define an action plan for the local conservation of the species. P. zolii is locally rare and exhibits a much-localised distribution, but additional sampling is needed in other humid areas to fill out the knowledge gap on global distribution. The activity period is very restricted, limited to the central hours of the day, with low detectability and high specialisation in habitat use. The species is evaluated as Critically Endangered at the national level and is threatened by industrial and agriculture developments. These activities have degraded the suitable available habitats and hamper any dispersal possibility. Extreme climatic events related with sea-level rise could decimate the entire Mauritanian population. Any pet trade that may be stimulated by the current discovery should be carefully supervised and monitored. The discovery of this isolated population justifies that coastal habitats should be designated as integral protection zone and included inside the Diawling National Park.","PeriodicalId":49247,"journal":{"name":"African Journal of Herpetology","volume":"70 1","pages":"166 - 176"},"PeriodicalIF":1.5,"publicationDate":"2021-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46475126","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A can of worms: Identification issues and morphological conservatism in a large sample of African Green and Bush Snakes (Colubridae: Philothamnus) from Minziro Forest, Tanzania","authors":"Tejs Gørgens Nielsen, S. H. Nielsen, P. Gravlund, D. Moyer, A. Galatius, M. Allentoft","doi":"10.1080/21564574.2021.1976289","DOIUrl":"https://doi.org/10.1080/21564574.2021.1976289","url":null,"abstract":"ABSTRACT The African green snakes of the genus Philothamnus include c. 21 recognised species distributed across sub-Saharan Africa. Many of the species exhibit high morphological conservatism, exist sympatrically, and can have high population densities. This is presumably the reason why the number of species, their systematics, and taxonomy remain debated, and this may compromise the ability to conduct accurate species identifications based on morphological characters. To investigate and quantify this problem, we examined a large sympatric sample of ethanol-preserved Philothamnus specimens from Minziro Forest, Tanzania. Of the 248 specimens examined, 55 were P. heterolepidotus, 49 were P. hoplogaster, 33 were P. angolensis, and one was P. ornatus. A further 110 specimens could not be assigned to any species based on existing identification keys. Thus, this unidentified sample of Philothamnus comprises new forms or undescribed polymorphisms within recognised forms. We examined diagnostic morphological characters using a multivariate approach. Results revealed that if the presence or absence of the white spot character is ignored, many unidentified individuals fall within well-defined clusters based on other characters. These include the heart position, which we explore here as a new diagnostic character for this genus. A thorough revision using integrative taxonomy, for example combining morphological and genetic characteristics from across the spectrum of variability in this genus, could provide a better understanding of species limits, diversity, evolutionary history, and radiation of some of the most commonly encountered snakes in sub-Saharan Africa. This would also improve the taxonomic accuracy of regional herpetological biodiversity assessments.","PeriodicalId":49247,"journal":{"name":"African Journal of Herpetology","volume":"70 1","pages":"123 - 138"},"PeriodicalIF":1.5,"publicationDate":"2021-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44385078","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Ethnomedicinal use of pythons by traditional medicine practitioners in Ghana","authors":"M. Boakye, E. Wiafe, Meyir Y Ziekah","doi":"10.1080/21564574.2021.1976288","DOIUrl":"https://doi.org/10.1080/21564574.2021.1976288","url":null,"abstract":"ABSTRACT The use of Python spp. for traditional medicine purposes has been recorded, but there is a dearth of information on the versatility of body parts used for the treatment of human ailments. This study aimed to determine the medicinal knowledge and level of agreement among traditional medicine practitioners in Ghana on the use of pythons for the treatment of human ailments. Ethnozoological data on the use of pythons for the treatment of human ailments were gathered from 45 traditional medicine practitioners using semi-structured interviews. The use value index and informant agreement ratio were calculated to ascertain the most sought after python body part and the level of agreement of a python body part for the treatment of human ailments. The python head, bones, and skin were the body parts found to be used for traditional medicine purposes together with the fat and eggs. Python fat had the highest use value and informant agreement ratio. Rheumatism, headache, bedwetting, diabetes, and spiritual protection were among the human ailments that were treated with python. Overall, python medicinal use was mainly for spiritual ailments rather than medical ailments. Although the python is currently of less international conservation importance, there is a need to reconcile the high use values of species by traditional medicine practitioners with their conservation status to evaluate their current threats.","PeriodicalId":49247,"journal":{"name":"African Journal of Herpetology","volume":"70 1","pages":"155 - 165"},"PeriodicalIF":1.5,"publicationDate":"2021-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42420150","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"African Journal of Herpetology: Bibliography and taxonomic discoveries of the past ten years","authors":"Jens Reissig","doi":"10.1080/21564574.2021.1952317","DOIUrl":"https://doi.org/10.1080/21564574.2021.1952317","url":null,"abstract":"ABSTRACT During the past ten years, the African Journal of Herpetology has published various papers regarding African Herpetology from all corners of the African continent. The journal is published twice per annum with an average of six articles per issue. Below is listed all publications, as well as taxonomic discoveries that appeared in the journal over the past decade.","PeriodicalId":49247,"journal":{"name":"African Journal of Herpetology","volume":"70 1","pages":"185 - 194"},"PeriodicalIF":1.5,"publicationDate":"2021-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45123477","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Fire associated exertion myopathy as a mechanism contributing to mortality in Chamaesaura macrolepis (Cope 1862)","authors":"PR Jordaan, Jca Steyl","doi":"10.1080/21564574.2021.1938244","DOIUrl":"https://doi.org/10.1080/21564574.2021.1938244","url":null,"abstract":"ABSTRACT Following a fire event, an abnormally high number of Chamaesaura macrolepis (Cope 1862) road mortalities were observed on two sections of tar road south of Maputo Special Reserve, Maputo Province, Mozambique. Although most specimens were driven over by vehicles, three intact individuals were collected on the shoulder of the tarred road surface, without exhibiting any external signs of vehicular trauma or thermal damage. Histopathological examination of dissected tissues revealed acute skeletal and cardiac myopathy in all three specimens, suggesting a novel facet of faunal responses to fire and the physical strain exerted to avoid these conditions. No reports of fire associated exertion myopathy could be located for any other animals in the available literature.","PeriodicalId":49247,"journal":{"name":"African Journal of Herpetology","volume":"70 1","pages":"177 - 184"},"PeriodicalIF":1.5,"publicationDate":"2021-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/21564574.2021.1938244","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45588935","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}