2 Monitoring of Marine Aquaculture
59
ground parameters
once per year; maximum trophic index
of 5.5
Malta
Finfish (mainly sea
bream and blue fin
tuna)
Water quality at
some farms
Water quality; sediment
quality; benthic
diversity; state of
benthic habitats in
the vicinity of farm
–
Compliance with EU
Directives
The Netherlands
Shellfish (cockles,
mussels, oysters)
–
Aerial photography and
ground counts of
inter-tidal mussel
stocks. Biotoxins
and microbes in
shellfish growing
waters sampled 2
times per week
–
Biotoxins and microbes in
shellfish flesh 2 times per
week
Norway
Finfish (mainly salmonids); shellfish
(mainly mussels)
–
Shellfish water quality
once per month.
Finfish farms monitored according to
Norwegian Standard
NS9410
–
10% of finfish licences sampled every year to check
for chemicals in muscle
and feed; all medicated
fish are checked; shellfish
waters monitored throughout the year for biotoxins,
microbes and chemicals
Portugal
Shellfish (clams, oysters, cockles); some
finfish (sea bass,
sea bream, turbot)
–
Mollusc water quality once per month
or once every 3
month depending on
parameter
–
Compliance with food quality
standards
(continued)