We staried to get apprecia
oF
surprising to us.
2 mortalit ies
when we raised. the tomporature perhaps two or three cegrecs
Centigzade, and thes2 temo
tava
raises are considerably greater
than those created by the effluent goings into the river.
I would
like to point that out,
Also, Sinca wo have run that, we found within this
spscics there is a considerable temperature diitierenca,
This
has been showm, too, with the work at the Applied lisherics
Lapovatory. “We ran these oa Fuget Sounc because these ezcs are
a lot enusior to get and ve Got thesa from strains that inhabit
the Columbia River.
Gur leccl strain aro used to spavming in
on
Warner water than is characteristic of this particular species
by a natter of a few degress,
The tolerance of the lecnl fish 28 slightly greater
than it is for these.
A sesond experiment shows that these mortalities -we can shift this (indicating) up a couvle of degress from where
it is nov.
Enovgh for the temperature factor.
. Let us now get back out into the Columbia River.
These sampling staves have bc2en selected for several roasons.
One is to try to catch the spot where concentrations of radioactive material are high.
Also, we try to solect them so that
hydrographically they are as similar as pessible.
Wa try to
select shallow, gravel river arsas whero the current speed was