41
35
55°
60°
100
99
86
17
8
12
100
86
22
8
14
64°
87
23
ll
31
week*** week
;
last died on
two completed hatching
All died within 3 days
All died by 20th day
but died 2 days later (28th day)
Greatest mortality about time of
last died on 50th day
hatching;
sac;
All died before absorption of yolk
165th day (April 28)
Two survived to feeding;
High mortality during absorption of
yolk sac
Did not feed; weight at 46th week less
than at hatching
None hatched; all dead after 156 days
Remarks
Cumulative mortality in per cent to
34th
46th
1951.
water temperature was above 63°F
*k*Pirst week in July.
**Approximately the day on which all yolk sacs were abosrbed.
*The day on which 50% of lot was hatched.
range
temp.
city
63
126
6
19
27
66
water] 54°-42° 42°-47° 55°-41° 41°-47° 46°-63° 63°-67° Greatest mortality after July 4 when
100
74°
100
76
22
5
13
100
28
73
81
97
67°
65°
62-1/R° 32
51
50°
6
80
45°
145
7
225
128
ing
40°
yolk
sac**
100
ing*
Number of days to
Hatch- Abs. of |Hatch- Feeding
34°
temp.|
Lot
and
Eggs from a single pair from Soos Creek spawned on November 15,
of chinook salmon reared at city water temperature and various constant temperatures.
Numbers of days to hatching and absorption of yolk sac and per cent cumulative mortality
1
wn