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

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.

journal_name

Sci Rep

journal_title

Scientific reports

authors

Rivera-León VE,Urbán J,Mizroch S,Brownell RL Jr,Oosting T,Hao W,Palsbøll PJ,Bérubé M

doi

10.1038/s41598-019-48700-5

subject

Has Abstract

pub_date

2019-08-27 00:00:00

pages

12391

issue

1

issn

2045-2322

pii

10.1038/s41598-019-48700-5

journal_volume

9

pub_type

杂志文章

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