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———>: - Area Engineer
Box “0~Cateory 3332
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. * dress, Engineer
XG
‘ «© Ares, Engineer
Thle Oacument consists 2%
[PERRET ENTRY]
mee Na
7
Series 77.
LFcopie
pies.
o Dreto: 7 Jufas
By:
nos 3 noe
sae
Not Autnorized for Pubic Releese
By:
Harch 6, 1947
Cate:
PIS3LABORATORYPexap
BEST COPYAVAILABLE
Segond,ftcf
POP uneneddled
The silvar salmon monitorizg program cont‘ nues as the major study in progress
et she 146 Building,
The tempscature of the s.ver water has remained low
(4° te 5° 6.) and consequently Jevescpnent has been glow, However, some of the
egc3 in aven tha coldest TELE that is whars 0 warm effluent is being added,
ar; now starting to hatch,
hev shed are as follovs:
&rea Effluent Vater
1:5
21210
1325
Sgr aortaldtie g in those lots which are now completely
Troevghs
are ghs
Troughs
Troughs
1&
5 &
7 &
9 &
2
6
&
it
{Faver Water Gomtrol
Trooche 17,18,19 & 20
(Refrigerated Effluent Troighs 3&4
83-7
11.9
8.6
6.3
per
per
per
per
cent
cent
cent
cent
6.1 per cent - Incomplete}
5.7 per cent = Incomplete
‘The exceptionally low mort Wty among the eggs held in the refrigerated
ef:’ivent water is of intorest 22d parallels th results obtained with chinook
sanon last year, Howsver, ness of the ciisoo.: fry survived tha yolk sac period.
The ailver salmon fry in t29 effluent: vator of Troughs 1 & 2 have suffered
an oxtremely heavy mortellty ari less thar. 7if y now remain, Although these fry
aro approaching ths feeding st: 73, probably zcne will reach it. The mortality
anoag the fry in the 1:5 2tdstiion isvel ls risen abcve normal during the past
tw: wesks and many individual: aave sympikms o:' "thite spot" disease. The mcrtality bes not yet reachsd semcus proporticsas, horever, Other lots appoar nocrmal.
Construction of the new yonds ond pije liues is nearing completion.
Install-
ation of rew pumps, testing, e171 backfili’nz 2° tre axcavation are the major jobs
yes to be dons,
Arrangements have been cc:cleted for obta.nirg condermed beef liver at Pasco,
an: delivery of the liver has t2gun.
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