Dear MARMAM Colleagues,
My co-authors and I are pleased to announce the publication of the following article in the Journal of Mitochondrial DNA Part A :
Arsalan Emami-Khoyi, Adrian M. Paterson, David A. Hartley, Laura J. Boren,
Robert H. Cruickshank, James G. Ross, Elaine C. Murphy & Terry-Ann Else
Abstract :
The New Zealand fur seal
(Arctocephalus forsteri) passed through a population bottleneck due to com- mercial
sealing during the eighteenth to nineteenth centuries. To facilitate future
management options, we reconstructed the demographic history of New Zealand fur
seals in a Bayesian framework using maternally inherited, mitochondrial DNA
sequences. Mitogenomic data suggested two separate clades (most recent common
ancestor 5000 years ago) of New Zealand fur seals that survived large-scale
human harvest. Mitochondrial haplotype diversity was high, with 45 singletons
identified from 46 indi- viduals although mean nucleotide diversity was low
(0.012 ± 0.0061). Variation was not constrained geo- graphically. Analyses of
mitogenomes support the hypothesis for a population bottleneck approximately 35
generations ago, which coincides with the peak of commercial sealing.
Mitogenomic data are consistent with a pre-human effective population size of
approximately 30,000 that first declined to around 10,000 (due to the impact of
Polynesian colonization, particularly in the first 100 years of their arrival
into New Zealand), and then to 100–200 breeding individuals during peak of
commercial sealing.