10.5061/DRYAD.4V551
Dussex, Nicolas
University of Otago
Robertson, Bruce C.
University of Canterbury
Salis, Alexander T.
University of Otago
Kalinin, Aleksandr
University of Canterbury
Best, Hugh
Department of Conservation
Gemmell, Neil J.
University of Canterbury
Data from: Low spatial genetic differentiation associated with rapid
recolonization in the New Zealand fur seal Arctocephalus forsteri
Dryad
dataset
2018
decline
Conservation genetics and biodiversity
Arctocephalus forsteri
Population structure and phylogeography
contemporary data
NZFS
recolonization
Holocene
2016-08-24T15:55:45Z
2016-08-24T15:55:45Z
en
https://doi.org/10.1093/jhered/esw056
408768 bytes
2
CC0 1.0 Universal (CC0 1.0) Public Domain Dedication
Population declines resulting from anthropogenic activities are of major
consequence for the long-term survival of species because the resulting
loss of genetic diversity can lead to extinction via the effects of
inbreeding depression, fixation of deleterious mutations, and loss of
adaptive potential. Otariid pinnipeds have been exploited commercially to
near extinction with some species showing higher demographic resilience
and recolonization potential than others. The New Zealand fur seal (NZFS)
was heavily impacted by commercial sealing between the late 18th and early
19th centuries, but has recolonized its former range in southern
Australia. The species has also recolonized its former range in New
Zealand, yet little is known about the pattern of recolonization. Here, we
first used 11 microsatellite markers (n = 383) to investigate the
contemporary population structure and dispersal patterns in the NZFS
(Arctocephalus forsteri). Secondly, we model postsealing recolonization
with 1 additional mtDNA cytochrome b (n = 261) marker. Our data identified
3 genetic clusters: an Australian, a subantarctic, and a New Zealand one,
with a weak and probably transient subdivision within the latter cluster.
Demographic history scenarios supported a recolonization of the New
Zealand coastline from remote west coast colonies, which is consistent
with contemporary gene flow and with the species’ high resilience. The
present data suggest the management of distinct genetic units in the North
and South of New Zealand along a genetic gradient. Assignment of
individuals to their colony of origin was limited (32%) with the present
data indicating the current microsatellite markers are unlikely sufficient
to assign fisheries bycatch of NZFSs to colonies.
NZFS ctybMitochondrial Cytochrome b sequences for 261 NZ fur seal
pupsNZFS_microsatellitesMicrosatellite genotypes for 383 NZ fur seal
pupsNZFS genepop_Dussex et al.
2016.txtNZFS_microsat_cytb_DIYABCMicrosatellite and Cytochrome b input
data file for DIYABCNZFS colony names locationsNZ fur seal colony names
and geographic coordinates
New Zealand
Australia
subantarctic