RT Journal Article
T1 Tracing the genetic impact of farmed turbot Scophthalmus maximus on wild populations
A1 Prado, Fernanda Dotti do
A1 Vera Rodríguez, Manuel
A1 Hermida Prieto, Miguel
A1 Blanco Hortas, Andrés
A1 Bouza Fernández, María Carmen
A1 Maes, Gregory E.
A1 Volckaert, Filip A. M.
A1 The Aquatrace Consortium, 
A1 Martínez Portela, Paulino
K1 Aquaculture
K1 Introgression
K1 Restocking
K1 Scophthalmus maximus
K1 SNPs
K1 Sustainability
K1 Traceability tool
AB The impact of escapees from aquaculture is of general concern for the sustainability of natural resources. Turbot Scophthalmus maximus is a marine flatfish of great commercial value whose land-based aquaculture started approx. 40 yr ago; hence, a low impact of escapees is expected on wild populations. However, enhancement of wild stocks using farmed turbot has been carried out along the Northeast Atlantic coasts in the last decades. Recently, a broad panel of single nucleotide polymorphism (SNP) markers (755 SNPs; 1 SNP Mb−1) has been used to evaluate the genetic structure of turbot throughout its distribution range, constituting the baseline to evaluate the impact of farmed fish in the wild. Two distinct origins were identified for farmed turbot (F_ORI1 and F_ORI2; FST = 0.049), which differentiated from wild populations after 5 generations of selection (average FST = 0.059), and consistent evidence of adaptation to domestication was detected. A notable proportion of fish of farmed ancestry was detected in the wild (15.5%), mainly in the North Sea, where restocking activities have taken place, determining genetic introgression in wild populations. Conversely, effects of land-based aquaculture appear negligible. A simulation exercise supported panels of 40 and 80 SNPs to identify fishes of F_ORI1 and F_ORI2 ancestry in the wild, respectively. Application to empirical data showed an assignment success (wild/farmed ancestry) of approx. 95% in comparison with the full SNP dataset. The SNP tools will be useful to monitor turbot of farmed ancestry in the wild, which might represent a risk, considering the lowerfitness of farmed individuals 
PB Inter-Research Science Publisher
SN 1869-215X
YR 2018
FD 2018
LK http://hdl.handle.net/10347/22716
UL http://hdl.handle.net/10347/22716
LA eng
NO Prado FD, Vera M, Hermida M, Blanco A and others (2018) Tracing the genetic impact of farmed turbot Scophthalmus maximus on wild populations. Aquacult Environ Interact 10:447-463
NO The project was funded by the 7th Framework Programme for research (FP7) under‘Knowledge-Based Bio-Economy — KBBE’, Theme 2: ‘Food,Agriculture and fisheries, and Biotechnologies’ Project identifier: FP7-KBBE-2012-6-singlestage Grant agreement no.:311920 ‘The development of tools for tracing and evaluatingthe genetic impact of fish from aquaculture: AquaTrace’and the Spanish Regional Government Xunta de GaliciaGRC2014/010. Ciência sem Fronteiras/CAPES − Brazil supported the fellowship for the stay of F.D.P. at USC
DS Minerva
RD 28 abr 2026