Translation Series No.1211

nachafter
00 04
0,3
0,4 2 1
0,5 6 9
0,6 11 15
• 0,7 11 14
0,8 5 3
0,9
T2
_
afte
(31) (12)
0,2
0,3 2 7
0,4 16 16
0,5 13 13
0,6 4 ' 6
0,7
- 218-
of F and z 3 on the result of the proportion can only be small. There-
3
fore the numerical ratio between the salmon caught during the second and
third years in the sea is determined principally by F 2 and T 2 . If we now
try to obtain an approximation to the actual values of the parameters
with the aid of equation (12), then the poèsibilities of combination can
[p. 358 ]
be reduced considerably through the limits for T 2 that have been obtained
with the aid of (11). A.deviation of .± 0.126 (5 Per cent) for the value
of the proportion will be considered as permissible. The remaining pos-
sibilities result in the following distribution of frequencies for F 2 and
T 2 :
one obtains:
ana T,:
The weighted mean of these series amounts to for
F 2 = 0.63
T 2 = 0.45
. With M = 0.1 it is then
Z 2 = 1.18.
When these values are inserted in the equations (11) and (12),
Z3 2,0901 F3 (1 — e—zs (t2—ti))
Z3 2,2$05 T3 (1 e—zs (t2*tI))
The division of the two expression results in:
Since
1,0911 T3
Z3 F3 + T3 «
Z3 = 2,1911 . T3 '
We thus have three equations from which we can calculate F3