Review of the distribution, population trends, threats, and conservation options for the endangered Zambezi flapshell turtles (Cycloderma frenatum Peters, 1854) in range states

Submitted: 14 October 2023
Accepted: 14 March 2024
Published: 22 April 2024
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The endangered Zambezi flapshell turtle, Cycloderma frenatum Peters, 1854, is endemic to southern and eastern Africa. Habitat ecology and usage are not well known for the Zambezi flapshell turtle, although its population has been reported to have undergone massive declines in recent years. This review examined the i) population trends, ii) habitat range shifts, and iii) threats and conservation options for the Zambezi flapshell turtle in its range states. The species is data deficient because of a lack of assessments of trends in population size and distribution. Trafficking, overfishing, poaching, habitat degradation, and infrastructural developments in riparian zones affect the distribution of the Zambezi flapshell turtle. Conservation options such as deterrent punishments and protection of aquatic habitats are important, although they need to be consistently implemented. Carefully managed harvest plans supported by captive breeding, highly controlled incubation of eggs, hatching of larvae, and remotely sensed tracing of specimens to curb trafficking are potentially effective conservation options for the Zambezi flapshell turtle. Inclusion in international wildlife trade regulations, integration of local ecological knowledge into management, and development of connectivity conservation strategies are priority actions for sustaining the Zambezi flapshell turtle populations across the shared basins where it is endemic.

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Baker PJ, Diagne T, Luiselli L. 2015. Cyclanorbis elegans (Gray 1869) – Nubian Flapshell Turtle. In: Rhodin AGJ, Pritchard PCH, Van Dijk PP, Saumure RA, Buhlmann KA, Iverson JB, Mittermeier RA, editors. Conservation Biology of Freshwater Turtles and Tortoises: A Compilation Project of the IUCN/SSC Tortoise and Freshwater Turtle Specialist Group. Chelonian Research Monographs. 5(8):089.1–7. https://doi.org/10.3854/crm.5.089.elegans.v1.2015, http://www.iucn-tftsg.org/cbftt/. DOI: https://doi.org/10.3854/crm.5.089.elegans.v1.2015
Betchell HB. 1995. Reptile and amphibian variants: colors, patterns and scales. Malabar (FL, USA): Krieger Publishing. 206 pp.
Bombi P, Luiselli L, D’Amen M. 2011. When the method for mapping species matters defining priority areas for conservation of African freshwater turtles. Diversity & Distributions. 17(4):581–592. DOI: https://doi.org/10.1111/j.1472-4642.2011.00769.x
Bonin F, Devaux B, Dupré A. 2006. Turtles of the World. Translated by Peter C.H. Pritchard. Baltimore (MD, USA): Johns Hopkins University Press. 416 pp.
Bour R. 2008. Global diversity of turtles (Chelonii; Reptilia) in freshwater. Hydrobiologia. 595:593–598. DOI: https://doi.org/10.1007/s10750-007-9244-5
Boycott RC, Bourquin O. 2000. The Southern African Tortoise Book: a guide to southern African tortoises, terrapins and turtles. Hilton (South Africa): O. Bourquin. 228 pp.
Branch B. 1998. Field guide to the snakes and other reptiles of Southern Africa. Fort Myers (FL, USA): Ralph Curtis Publishing. 368 pp.
Branch WR. 2003. Herpetological Survey of the Niassa Game Reserve. Report prepared for Sociedade para a Gestäo e Desenvolvimeno da Reserva do Niassa, Mocambique. Port Elizabeth: Bayworld. 59 pp.
Branch WR. 2008. Tortoises, Terrapins & Turtles of Africa. Cape Town: Struik Publishers. 128 pp.
Branch WR, Baard EHW, Haacke WD, Jacobsen N, Poynton JC, Broadley DG. 1988. A provisional & annotated checklist of the herpetofauna of southern Africa. African Journal of Herpetology. 34(1):1–19. DOI: https://doi.org/10.1080/04416651.1988.9650182
Branch WR, Rödel M-O, Marais J. 2005. Herpetological survey of the Niassa Game Reserve, northern Mozambique - Part I: Reptiles. Salamandra. 41(4):195–214.
Broadley DG. 1962. On some reptile collections from the North-Western and North-Eastern Districts of Southern Rhodesia 1958-1961, with descriptions of four new lizards. Occupation Paper National Museum. South Rhodesia. 26(B):787–843.
Broadley DG. 1971. The reptiles and amphibians of Zambia. The Puku. 6:1–143.
Broadley DG. 1984. The Nkhasi or Zambezi soft shelled turtle. Hartebeest. 15: 8–11.
Broadley DG. 1990. The Zambezi flap shelled turtle or Nkhasi (Cycloderma frenatum). Zimbabwe Science News. 24(10-12):100–101.
Broadley DG, Howell KM. 1991. A check list of the reptiles of Tanzania, with synoptic keys. Syntarsus. 1:1–70.
Broadley DG, Sachsse W. 2011. Cycloderma frenatum Peters 1854 – Zambezi Flapshell Turtle, Nkhasi. In: Rhodin AGJ, Pritchard PCH, van Dijk PP, Saumure RA, Buhlmann KA, Iverson JB, Mittermeier RA, editors. Conservation biology of freshwater turtles and tortoises: A compilation project of the IUCN/SSC Tortoise and Freshwater Turtle Specialist Group. Chelonian Research Monographs. 5:055.1–055.5. https://doi.org/10.3854/crm.5.055.frenatum.v1.2011, //iucn-tftsg.org/cbft. DOI: https://doi.org/10.3854/crm.5.055.frenatum.v1.2011
CITES (Convention on International Trade In Endangered Species of Wild Fauna and Flora). 2016. Consideration of Proposals for Amendment of Appendices I and II. Seventeenth meeting of the Conference of the Parties Johannesburg (South Africa), 24 September–5 October 2016.
Fritz U, Tolley K.A, Vamberger M, Ihlow F. 2022. Phylogeny and phylogeography of chelonians from sub-Saharan Africa – A review of current knowledge in tribute to Margaretha D. Hofmeyr. Vertebrate Zoology. 72:951–969. DOI: https://doi.org/10.3897/vz.72.e95681
Gramentz D. 2008. African Flapshell Turtles –The genera Cyclanorbis and Cycloderma. Frankfurter Beiträge zur Naturkunde. 34:1–191. Frankfurt am Main: Edition Chimaira.
Gray JE. 1844. Catalogue of the Tortoises, Crocodiles, and Amphisbænians, in the Collection of the British Museum. London: Trustees of the British Museum. viii + 80 pp.
Gray JE. 1860. Description of a soft tortoise (Aspidochelys livingstonii) from the Zambesi, sent to the British Museum by Dr. Livingstone. Annual Magazine of Natural History. 3(6):68–69.
Haagner GV, Morgan DR. 1991. Life History Note: Cycloderma frenatum. Reproduction. The Journal of Herpetology Association Africa. 39:26–27. DOI: https://doi.org/10.1080/04416651.1991.9650298
IUCN. 2016. The IUCN Red List of Threatened Species. Version 2016-2. Available at: www.iucnredlist.org. (Accessed: 04 September 2016).
Iverson JB. 1992. A revised checklist with distribution maps of the Turtles of the World. Richmond (IN, USA): Privately published. 363 pp.
Jubber WR, Leyendecker M. 2016. Distribution record of a xanthic Zambezi Flap-shelled Terrapin Cycloderma frenatum at the Rufiji River, Tanzania. Biodiversity Observations. 7(46): 1–6.
Loveridge A. 1942. Scientific results of a fourth expedition to forested areas in east & central Africa. IV. Reptiles. Bulletin of the Museum of Comparative Zoology at Harvard College. 91(4):237–373.
Loveridge A. 1953a. Zoological results of a fifth expedition to East Africa. III - Reptiles from Nyasaland and Tete. Bulletin of Museum of Comparative Zoology, Harvard. 110(3):141-322.
Loveridge A. 1953b. Zoological results of a fifth expedition to East Africa. IV - Amphibians from Nyasaland and Tete. Bulletin of Museum of Comparative Zoology, Harvard. 110(4):323–406.
Loveridge A, Williams EE. 1957. Revision of the African tortoises and turtles of the suborder Cryptodira. Bulletin of the Museum of Comparative Zoology Harvard College. 115(6):160–557, 18 pls.
Luiselli L. 2009. A model assessing the conservation threats to freshwater turtles of Sub-Saharan Africa predicts urgent need for continental conservation planning. Biodiversity & Conservation. 18(5):1349–1360. DOI: https://doi.org/10.1007/s10531-008-9486-1
Luiselli L, Civetta F, Masciola S, Milana G, Amori G. 2012. Spatial turnover and knowledge gaps for African chelonians mirror those of African small mammals: conservation implications. Tropical Conservation Science. 5(3):365–380. DOI: https://doi.org/10.1177/194008291200500310
Luiselli L, Diagne T, McGovern P. 2021. Prioritizing the next decade of freshwater turtle and tortoise conservation in West Africa. Journal of Nature Conservation. 60:125977. DOI: https://doi.org/10.1016/j.jnc.2021.125977
Luiselli L, Starita A, Carpaneto GM, Segniagbeto GH, Amori G. 2016. A short review of the international trade of wild tortoises and freshwater turtles across the world and throughout two decades. Chelonian Conservation and Biology. 15:167–172. DOI: https://doi.org/10.2744/CCB-1216.1
Meylan PA, Weig BS, Wood RC. 1990. Fossil soft-shelled turtles (Family Trionychidae) of the Lake Turkana Basin, Africa. Copeia. 2:508–528. DOI: https://doi.org/10.2307/1446355
Mitchell BL. 1946. A naturalist in Nyasaland. Nyasaland Agricultural Quarterly Journal. 6:1–47.
Mitchell BL. 1959. Some notes on the Nkhasi or Nyasa soft-shelled turtle (Cycloderma frenatum). The Journal of the Herpetological Association of Rhodesia. 6:5–6. DOI: https://doi.org/10.1080/0440730X.1959.9650594
Moll D, Moll EO. 2004. The ecology, exploitation, and conservation of river turtles. New York (NY): Oxford University Press. 393 pp. DOI: https://doi.org/10.1093/oso/9780195102291.001.0001
Nakayama M. 2003. International waters in Southern Africa. Tokyo: United Nations University Press. 240 pp.
Page MJ, McKenzie JE, Bossuyt PM, Boutron I, Hoffmann TC, Mulrow CD, Shamseer L, Tetzlaff JM, Akl EA, Brennan SE, et al. 2021. The PRISMA 2020 statement: an updated guideline for reporting systematic reviews. BMJ. 372:71. https://doi.org/10.1136/bmj.n71 DOI: https://doi.org/10.1136/bmj.n71
Peters WCH. 1854. Übersicht der auf seiner Reise nach Mossambique beobachteten Schildkröten. Monatsberichte der Akademie der Wissenschaften zu Berlin. 1854:215–216.
Peters WCH. 1882.Naturwissenschaftliche Reise nach Mossambique auf Befehl seiner Majestät des Königs Friedrish Wilhem IV in den Jahren 1842 bis 1848 ausgefürt. Zoologie 3, Amphibien. Berlin: Druck un Verlag von G. Reimer. 191 pp, 26 pls.
Rhodin AGJ, van Dijk PP, Iverson JB, Shaffer HB. 2010. Turtles of the world 2010 update: Annotated checklist of taxonomy, synonymy, Distribution and conservation status. Chelonian Research Monograph. 5:85–164. DOI: https://doi.org/10.3854/crm.5.000.checklist.v3.2010
Robin des Bois. 2014. Tortoises and freshwater turtles. On the Trail: Information and analysis bulletin on animal poaching and smuggling. 6:13–19.
Spawls S, Howell K, Drewes R, Ashe J. 2002. A Field Guide to the Reptiles of East Africa: Kenya, Tanzania, Uganda, Rwanda, Burundi. London: Academic Press. 543 pp.
Spawls S, Howell K, Hinkel H, Menegon M. 2018. Field Guide to East African Reptiles. London: Bloomsbury Natural History. 624 pp.
Sweeney RCH. 1960. The Chelonia of Nyasaland protectorate. The Nyasaland Journal. 13(1):35–-50.
Thieme M L. 2005. Freshwater Ecoregions of Africa and Madagascar: A Conservation Assessment. Washington DC: Island Press. p. 173–175.
Thomson RC, Andrew MS, Scott VE, Shaffer HB. 2008. Developing markers for multilocus phylogenetics in non-model organisms: A test case with turtles. Molecular Phylogenetics and Evolution. 49(2):514–-525. DOI: https://doi.org/10.1016/j.ympev.2008.08.006
TCC (TURTLE CONSERVATION COALITION). 2018. [Stanford CB, Rhodin AGJ, Van Dijk, PP, Horne BD, Blanck T, Goode EV, Hudson R, Mittermeier RA, Currylow A, Eisemberg C, et al., editors]. Turtles in trouble: the World’s 25+ most endangered tortoises and freshwater turtles—2018. Ojai (CA): IUCN SSC Tortoise and Freshwater Turtle Specialist Group, Turtle Conservancy, Turtle Survival Alliance, Turtle Conservation Fund, Chelonian Research Foundation, Conservation International, Wildlife Conservation Society, and Global Wildlife Conservation. 80 pp.
TTWG (TURTLE TAXONOMY WORKING GROUP). 2017. [Rhodin AGJ, Iverson JB, Bour R, Fritz U, Georges A, Shaffer HB, Van Dijk PP.] Turtles of the World: annotated checklist and atlas of taxonomy, synonymy, distribution, and conservation status. Eighth edition. Chelonian Research Monographs. 7:1–292.
Utete B. 2020. A review of the ecology, population trends, threats and conservation strategies for the common hippopotamus, Hippopotamus amphibius L, in water systems of Zimbabwe. African Zoology. 55(3):187–200. DOI: https://doi.org/10.1080/15627020.2020.1779613
van Dijk PP, Iverson JB, Shaffer HB, Bour R, Rhodin AGJ. 2014. Turtles of the world, 7th edition: annotated checklist of taxonomy, synonymy, distribution, and conservation status. Turtle Taxonomy Working Group. In: Rhodin AGJ, Pritchard PCH, van Dijk PP, Saumure RA, Buhlmann KA, Iverson JB, Mittermeier RA. (Eds.). Conservation Biology of Freshwater Turtles and Tortoises: A Compilation Project of the IUCN/SSC Tortoise and Freshwater Turtle Specialist Group. Chelonian Research Monographs. 5:000.165–000.242. https://doi.org/10.3854/crm.5.000.checklist.v4.2011, http://www.iucn–tftsg.org/cbftt/. DOI: https://doi.org/10.3854/crm.5.000.checklist.v7.2014
van Dijk PP. 2016. Cycloderma frenatum. The IUCN Red List of Threatened Species 2016: e.T6009A3088072. https://dx.doi.org/10.2305/IUCN.UK.20162.RLTS.T6009A3088072.en. Accessed on 23 April 2021.

How to Cite

Utete, B. (2024). Review of the distribution, population trends, threats, and conservation options for the endangered Zambezi flapshell turtles (<i>Cycloderma frenatum</i> Peters, 1854) in range states. Tropical Zoology, 37(1-2). https://doi.org/10.4081/tz.2024.146