[MARMAM] New publication: Long-term isolation at a low effective population size greatly reduced genetic diversity in Gulf of California fin whales

Rivera Leon, V.E. v.e.rivera.leon at rug.nl
Thu Sep 5 02:50:58 PDT 2019


Dear Colleagues,



My co-authors and I are pleased to announce the following open-access
publication:



Long-term isolation at a low effective population size greatly reduced
genetic diversity in Gulf of California fin whales

https://rdcu.be/bPDXv



Abstract

The Gulf of California, Mexico is home to many cetacean species, including
a presumed resident population of fin whales, *Balaenoptera physalus*. Past
studies reported very low levels of genetic diversity among Gulf of
California fin whales and a significant level of genetic differentiation
from con-specifics in the eastern North Pacific. The aim of the present
study was to assess the degree and timing of the isolation of Gulf of
California fin whales in a population genetic analysis of 18 nuclear
microsatellite genotypes from 402 samples and 565 mitochondrial control
region DNA sequences (including mitochondrial sequences retrieved from
NCBI). The analyses revealed that the Gulf of California fin whale
population was founded ~2.3 thousand years ago and has since remained at a
low effective population size (~360) and isolated from the eastern North
Pacific (*Nem* between 0.89–1.4). The low effective population size and
high degree of isolation implied that Gulf of California fin whales are
vulnerable to the negative effects of genetic drift, human-caused mortality
and habitat change.



Please email me if you have any questions about this work (
v.e.rivera.leon at rug.nl).



All my best,

Vania
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