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Jacob Bisgaard
01-08-97 12.17
Dear Fish-Ecology member
I have a request about salmonid migration, especially atlantic salmon
(Salmo salar) and brown trout (Salmo trutta) but all salmonid species are
of interest, in relation to the discharge of domestic- and industrial
waste water. The waste water is well treated so there is no depletion of
oxygen in the streams that receive the waste water
Does anyone have knowledge and/or references concerning the
behaviour/reaction of salmonids when exposed to treated waste water,
especially waste water from dye works, sewage treatment plants and paper
mills.
Does the treated waste water disturb the spawing migration of salmonids,
e.g. as a chemical barrier, attraction or any sublethal effects. Does the
treated waste water affect the smolt migration by either imprinting or
otherwise.
Thank You for your help
Yours sincerely
Jakob Bisgaard
Ringkjøbing Amt
Teknik- og miljøområdet
Damstrædet 2
DK - 6950 Ringkøbing
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