Rare but Not Gone: A Relict Population of the Black Sea Ship Sturgeon Acipenser nudiventris Persists in the Rioni River, Georgia

نویسندگان

چکیده

Historically, the ship sturgeon (Acipenser nudiventris) occurred in Aral, Caspian, Azov, and Black Sea basins. However, its numbers decreased dramatically during 20th century. It is now considered extirpated from Seas, has almost disappeared Caspian Sea. A. nudiventris listed as Critically Endangered on IUCN Red List and, Georgia, species been undetected for last three decades. We collected 22 sightings, including nine genetic samples taken fin clips of Rioni River Georgia 2020–2022. For samples, mitochondrial DNA control region was used identification. Because cases inter-species hybridization have reported River, we species-specific diagnostic markers sturgeon-specific microsatellite detecting with other species. In addition, a sex-specific marker sex Based maternal identification, all individuals are identified sturgeon, representing one haplotype, haplotype different haplotypes available GenBank. analysis, specimens did not show signs locally occurring conclude that still live remnant an older, preexisting population.

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ژورنال

عنوان ژورنال: Diversity

سال: 2022

ISSN: ['1424-2818']

DOI: https://doi.org/10.3390/d14121102