Evolutionary history and identification of conservation units in the giant otter, Pteronura brasiliensis

Journal article


Pickles, R., Groombridge, J., Rojas, V., Van Damme, P., Gotelli, D., Kundu, S., Bodmer, R., Ariani, C., Iyengar, A. and Jordan, W. 2011. Evolutionary history and identification of conservation units in the giant otter, Pteronura brasiliensis. Molecular Phylogenetics and Evolution. 61 (3), pp. 616-627. https://doi.org/doi:10.1016/j.ympev.2011.08.017
AuthorsPickles, R., Groombridge, J., Rojas, V., Van Damme, P., Gotelli, D., Kundu, S., Bodmer, R., Ariani, C., Iyengar, A. and Jordan, W.
Abstract

The giant otter, Pteronura brasiliensis, occupies a range including the major drainage basins of South America, yet the degree of structure that exists within and among populations inhabiting these drainages is unknown. We sequenced portions of the mitochondrial DNA (mtDNA) cytochrome b (612bp) and control region (383 bp) genes in order to determine patterns of genetic variation within the species. We found high levels of mtDNA haplotype diversity (h = 0.93 overall) and support for subdivision into four distinct groups of populations, representing important centers of genetic diversity and useful units for prioritizing conservation within the giant otter. We tested these results against the predictions of three hypotheses of Amazonian diversification (Pleistocene Refugia, Paleogeography, and Hydrogeology). While the phylogeographic pattern conformed to the predictions of the Refugia Hypothesis, molecular dating using a relaxed clock revealed the phylogroups diverged from one another between 1.69 and 0.84 Ma, ruling out the influence of Late Pleistocene glacial refugia. However, the role of Plio-Pleistocene climate change could not be rejected. While the molecular dating also makes the influence of geological arches according to the Paleogeography Hypothesis extremely unlikely, the recent Pliocene formation of the Fitzcarrald Arch and its effect of subsequently altering drainage pattern could not be rejected. The data presented here support the interactions of both climatic and hydrological changes resulting from geological activity in the Plio-Pleistocene, in shaping the phylogeographic structure of the giant otter.

Year2011
JournalMolecular Phylogenetics and Evolution
Journal citation61 (3), pp. 616-627
PublisherElsevier
ISSN1055-7903
Digital Object Identifier (DOI)https://doi.org/doi:10.1016/j.ympev.2011.08.017
Publication dates
PrintDec 2011
Online08 Sep 2011
Publication process dates
Deposited07 Apr 2016
Accepted17 Aug 2011
Output statusPublished
Permalink -

https://repository.canterbury.ac.uk/item/87qy1/evolutionary-history-and-identification-of-conservation-units-in-the-giant-otter-pteronura-brasiliensis

  • 3
    total views
  • 0
    total downloads
  • 0
    views this month
  • 0
    downloads this month

Export as