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Fluctuating asymmetry in the insular population of ayu, Plecoglossus altivelis ryukyuensis, estimating its genetic diversity at extinction.

Authors :
Ha, Linh Manh
Oka, Shin-ichiro
Iguchi, Kei'ichiro
Source :
Ichthyological Research. Jul2022, Vol. 69 Issue 3, p381-386. 6p.
Publication Year :
2022

Abstract

The present study tested the hypothesis that whether limited genetic diversity was the main factor that led the Ryukyu-ayu population on Okinawa-jima Island to extinction in the late 1970s. The usability of fluctuating asymmetry (FA) in reflecting genetic diversity was tested using two extant populations of Ryukyu-ayu on Amami-oshima Island, then used to estimate genetic diversity for the extinct population which only formalin-preserved specimens are available. The results showed that higher FA indices were associated with lower genetic diversity in the two extant populations, and the extinct population on Okinawa-jima Island had lower FA indices than the two extant populations on Amami-oshima Island. This finding suggests that the genetic diversity of the extinct population was not low enough as to cause its extinction. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
13418998
Volume :
69
Issue :
3
Database :
Academic Search Index
Journal :
Ichthyological Research
Publication Type :
Academic Journal
Accession number :
157529361
Full Text :
https://doi.org/10.1007/s10228-021-00840-3