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ID 26306
file
creator
Gonzalez, Enrique Blanco
subject
black sea bream
Acanthopagrus schlegelii
stock enhancement
genetic diversity
pedigree
microsatellite DNA
NDC
Fishing industry. Fisheries
abstract
Black sea bream have been intensively stocked in Hiroshima Bay since 1982. However, no information regarding the long-term effects resulting from the release of large numbers of juveniles on the wild population has been reported. We investigated the fate of black sea bream juveniles released at the sampling site from 2000 to 2001 using six microsatellite DNA markers. In 2003 and 2004 respectively, 12.5 and 13.5% of captured black sea bream were identified as hatchery reared. Variation in total length by age between the released and native stocks was not statistically significant. Low FST values confirmed high genetic similarity between wild and hatchery stocks. Pedigree reconstruction confirmed a small loss of genetic variability, with a final inbreeding rate for recaptured fish of around 3% per year, rising to 4% when both years were combined. There was high survival of released black sea bream juveniles. Some of these specimens reached maturity and may have hybridized with their wild counterparts, highlighting the need to monitor the genetic effects of releasing large number of juveniles.
journal title
Aquaculture
volume
Volume 276
issue
Issue 1-4
start page
36
end page
43
date of issued
2008-04
publisher
Elsevier B. V.
issn
0044-8486
ncid
publisher doi
language
eng
nii type
Journal Article
HU type
Journal Articles
DCMI type
text
format
application/pdf
text version
author
rights
Copyright (c) 2008 Elsevier B. V.
relation is version of URL
http://dx.doi.org/10.1016/j.aquaculture.2008.02.004
department
Graduate School of Biosphere Science