2015
DOI: 10.1002/ece3.1409
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Historical abiotic events or human‐aided dispersal: inferring the evolutionary history of a newly discovered galaxiid fish

Abstract: Range expansion of obligate freshwater fishes in the Cape Floristic Region (CFR) of South Africa has mostly been attributed to river capture events and confluence of rivers following sea-level regression. The role of low drainage divides and interbasin water transfers has received less attention. This study analyzed mitochondrial and nuclear DNA sequences to assess the processes that could have influenced the phylogeographic patterns of a newly discovered lineage of Galaxias zebratus (hereafter Galaxias zebrat… Show more

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Cited by 8 publications
(13 citation statements)
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References 65 publications
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“…Finally, Chakona et al . () suggested the possibility that recent human‐mediated translocation might explain the distribution of Cape galaxias Galaxias zebratus (Castelnau 1861) “Jourbertina” across two currently isolated river systems.…”
Section: Introductionmentioning
confidence: 99%
“…Finally, Chakona et al . () suggested the possibility that recent human‐mediated translocation might explain the distribution of Cape galaxias Galaxias zebratus (Castelnau 1861) “Jourbertina” across two currently isolated river systems.…”
Section: Introductionmentioning
confidence: 99%
“…Based on genetic patterns from Chakona et al (), the reconstructed historical range of Galaxias sp. ‘Joubertina’ is inferred to have encompassed both upland tributaries and mainstem sections of the Gamtoos tributaries in the Kouga subcatchment (Figure a).…”
Section: Resultsmentioning
confidence: 99%
“…While gene flow levels among all Galaxias sp. ‘Joubertina’ populations could have been naturally low (Chakona et al , ), the current situation where all known populations of this lineage are highly fragmented, and the presence of non‐native predators in river reaches among them, makes it unlikely that migration could occur among remnant populations. This could affect the lineage's long‐term viability and evolutionary potential owing to higher chances of inbreeding, which in turn could cause a loss of genetic variability and increase the risk of extinction (Frankham, ; Frankham et al, ).…”
Section: Discussionmentioning
confidence: 99%
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