English
 
Help Privacy Policy Disclaimer
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT

Released

Journal Article

Genetic structure of the grey side-gilled sea slug (Pleurobranchaea maculata) in coastal waters of New Zealand

MPS-Authors

Yıldırım,  Yeşerin
Department Microbial Population Biology, Max Planck Institute for Evolutionary Biology, Max Planck Society;

/persons/resource/persons56872

Rainey,  Paul B.
Department Microbial Population Biology, Max Planck Institute for Evolutionary Biology, Max Planck Society;

External Resource

Link
(Publisher version)

Fulltext (public)

journal.pone.0202197(7).pdf
(Publisher version), 17MB

Supplementary Material (public)
There is no public supplementary material available
Citation

Yıldırım, Y., Anderson, M. J., Hansson, B., Patel, S., Millar, C. D., & Rainey, P. B. (2018). Genetic structure of the grey side-gilled sea slug (Pleurobranchaea maculata) in coastal waters of New Zealand. PLoS One, 13(8): e0202197. doi:10.1371/journal.pone.0202197.


Cite as: http://hdl.handle.net/21.11116/0000-0005-1E7B-1
Abstract
Pleurobranchaea maculata is a rarely studied species of the Heterobranchia found throughout the south and western Pacific–and recently recorded in Argentina–whose population genetic structure is unknown. Interest in the species was sparked in New Zealand following a series of dog deaths caused by ingestions of slugs containing high levels of the neurotoxin tetrodotoxin. Here we describe the genetic structure and demographic history of P. maculata populations from five principle locations in New Zealand based on extensive analyses of 12 microsatellite loci and the COI and CytB regions of mitochondrial DNA (mtDNA). Microsatellite data showed significant differentiation between northern and southern populations with population structure being associated with previously described regional variations in tetrodotoxin concentrations. However, mtDNA sequence data did not support such structure, revealing a star-shaped haplotype network with estimates of expansion time suggesting a population expansion in the Pleistocene era. Inclusion of publicly available mtDNA sequence sea slugs from Argentina did not alter the star-shaped network. We interpret our data as indicative of a single founding population that fragmented following geographical changes that brought about the present day north-south divide in New Zealand waters. Lack of evidence of cryptic species supports data indicating that differences in toxicity of individuals among regions are a consequence of differences in diet.