Evidence of mitochondrial DNA clones of Siberian sturgeon, Acipenser baerii, within Russian sturgeon, Acipenser gueldenstaedtii, caught in the River Volga

Citation
I. Jenneckens et al., Evidence of mitochondrial DNA clones of Siberian sturgeon, Acipenser baerii, within Russian sturgeon, Acipenser gueldenstaedtii, caught in the River Volga, ECOL LETT, 3(6), 2000, pp. 503-508
Citations number
22
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Environment/Ecology
Journal title
ECOLOGY LETTERS
ISSN journal
1461-023X → ACNP
Volume
3
Issue
6
Year of publication
2000
Pages
503 - 508
Database
ISI
SICI code
1461-023X(200011)3:6<503:EOMDCO>2.0.ZU;2-8
Abstract
Eleven of 34 sturgeons caught in the River Volga classified morphologically as Acipenser gueldenstaedtii were identified as Acipenser baerii from sequ ence analysis of the mitochondrial cytochrome-b gene. The Caspian Sea and i ts tributaries including the Volga are not native habitats of A. baerii No A. baerii haplotype was observed in A. gueldenstaedtii from the Sea of Azov or the South Caspian Sea. Genetic contamination of A. gueldenstaedtii with A. baerii or A. baerii hybrids has occurred in the Volga. Crosses and back crosses of these specimens with native A. gueldenstaedtii resulted in the l oss of the morphological diagnostic A. baerii features. These findings are of special concern for conservation and management programmes, as well as f or specimen identification for caviar trading control.