Comparison of growth and RNA:DNA ratios in three populations of
juvenile turbot reared at two salinities
A.K. Imsland, A. Foss, S.W.
Bonga, E. van Ham, S.O. Stefansson-2002
Journal of
Fish Biology, 60(2):
288-300
Abstract:
Salinity significantly influenced growth
and RNA:DNA ratios in three populations (Iceland, Norway and
France) of juvenile turbot Scophthalmus maximus as
these variables were higher at 15 than at 33.5 ppt salinity.
Furthermore, growth and RNA:DNA ratios of the two
high latitude populations (Iceland and Norway) were
higher than those of the low latitude population (France):
the Norwegian and the Icelandic populations had
RNA:DNA ratios of 6.28 and 5.91, respectively, whereas
the ratio of the French population was 5.01. It is
concluded that in the upper temperature range for
turbot, growth can be improved by rearing at intermediate
salinities at least during the first year.
(Department of Fisheries and Marine Biology,
University of Bergen, High Technology Centre, N-5020, Bergen, Norway, email:
albert.imsland@akvaplan.niva.no)