Mind the gaps: investigating the cause of the current range disjunction in the Cape Platanna, Xenopus gilli (Anura: Pipidae)

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dc.contributor.authorFogell, Deborah J
dc.contributor.authorTolley, Krystal A
dc.contributor.authorMeasey, G John
dc.date.accessioned2021-10-08T07:08:34Z
dc.date.available2021-10-08T07:08:34Z
dc.date.issued2013
dc.description.abstractLow-lying areas of the Cape at Africa’s south-westernmost tip have undergone dramatic marine-remodelling, with regular changes in sea-level following glacial cycles. Species for which marine barriers are impenetrable underwent concomitant radical distribution changes which may account for current range disjunctions. The Cape platanna, Xenopus gilli, is a frog distributed in only three disjunt areas within low-lying regions of the southwestern Cape. We determined the relationship between frogs from these three disjunct areas, by using a combination of morphometric analysis and mtDNA (ND2 and 16S fragments) sequences of 130 frogs from eight ponds. Coalescent analyses on molecular data dated the divergence in two major clades to around 4.6 Mya, a period during which major uplifting on the eastern side of the subcontinent caused climate changes throughout southern Africa. Principal components analysis showed significant morphometric differences between each clade on head and limb measurements. Consistent differences in ventral colouration and patterning were also observed. We report on increased levels of hybridisation with X. laevis throughout the range of X. gilli, which reaches at least 27% hybrids in some ponds. Urgent conservation actions are required to control habitat loss from alien invasive vegetation, and prevent introgression with the domestic-exotic, X. laevis.
dc.identifier.apacitationFogell, D. J., Tolley, K. A., & Measey, G. J. (2013). Mind the gaps: investigating the cause of the current range disjunction in the Cape Platanna, Xenopus gilli (Anura: Pipidae). <i>PeerJ</i>, 1(4), e166 - 177. http://hdl.handle.net/11427/34608en_ZA
dc.identifier.chicagocitationFogell, Deborah J, Krystal A Tolley, and G John Measey "Mind the gaps: investigating the cause of the current range disjunction in the Cape Platanna, Xenopus gilli (Anura: Pipidae)." <i>PeerJ</i> 1, 4. (2013): e166 - 177. http://hdl.handle.net/11427/34608en_ZA
dc.identifier.citationFogell, D.J., Tolley, K.A. & Measey, G.J. 2013. Mind the gaps: investigating the cause of the current range disjunction in the Cape Platanna, Xenopus gilli (Anura: Pipidae). <i>PeerJ.</i> 1(4):e166 - 177. http://hdl.handle.net/11427/34608en_ZA
dc.identifier.issn2167-8359
dc.identifier.ris TY - Journal Article AU - Fogell, Deborah J AU - Tolley, Krystal A AU - Measey, G John AB - Low-lying areas of the Cape at Africa’s south-westernmost tip have undergone dramatic marine-remodelling, with regular changes in sea-level following glacial cycles. Species for which marine barriers are impenetrable underwent concomitant radical distribution changes which may account for current range disjunctions. The Cape platanna, Xenopus gilli, is a frog distributed in only three disjunt areas within low-lying regions of the southwestern Cape. We determined the relationship between frogs from these three disjunct areas, by using a combination of morphometric analysis and mtDNA (ND2 and 16S fragments) sequences of 130 frogs from eight ponds. Coalescent analyses on molecular data dated the divergence in two major clades to around 4.6 Mya, a period during which major uplifting on the eastern side of the subcontinent caused climate changes throughout southern Africa. Principal components analysis showed significant morphometric differences between each clade on head and limb measurements. Consistent differences in ventral colouration and patterning were also observed. We report on increased levels of hybridisation with X. laevis throughout the range of X. gilli, which reaches at least 27% hybrids in some ponds. Urgent conservation actions are required to control habitat loss from alien invasive vegetation, and prevent introgression with the domestic-exotic, X. laevis. DA - 2013 DB - OpenUCT DP - University of Cape Town IS - 4 J1 - PeerJ LK - https://open.uct.ac.za PY - 2013 SM - 2167-8359 T1 - Mind the gaps: investigating the cause of the current range disjunction in the Cape Platanna, Xenopus gilli (Anura: Pipidae) TI - Mind the gaps: investigating the cause of the current range disjunction in the Cape Platanna, Xenopus gilli (Anura: Pipidae) UR - http://hdl.handle.net/11427/34608 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/34608
dc.identifier.vancouvercitationFogell DJ, Tolley KA, Measey GJ. Mind the gaps: investigating the cause of the current range disjunction in the Cape Platanna, Xenopus gilli (Anura: Pipidae). PeerJ. 2013;1(4):e166 - 177. http://hdl.handle.net/11427/34608.en_ZA
dc.language.isoeng
dc.publisher.departmentDepartment of Biological Sciences
dc.publisher.facultyFaculty of Science
dc.sourcePeerJ
dc.source.journalissue4
dc.source.journalvolume1
dc.source.paginatione166 - 177
dc.source.urihttps://dx.doi.org/10.7717/peerj.166
dc.subject.otherHybridization
dc.subject.otherMorphometrics
dc.subject.otherPopulation genetics
dc.subject.otherRange disjunction
dc.subject.otherXenopus laevis
dc.subject.othermtDNA
dc.titleMind the gaps: investigating the cause of the current range disjunction in the Cape Platanna, Xenopus gilli (Anura: Pipidae)
dc.typeJournal Article
uct.type.publicationResearch
uct.type.resourceJournal Article
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