16
J. E. SHELBOURNE
TABLE I. DATA FROM A NORWEGIAN EXPERIMENT ON TEE PRACTICAL VALUE OW
COD-FRY LIBERATIONS. (After Fulton, 1908)
Shdeledfjord
HeUefjord
Cod
Total
Mean
God
Total
Mean
k c w e
catch
m.
larvae
catch
no.
liberated
0-group
per
liberated
0-group
per
( m i l l i m )
cod
haul
( m i l l i m )
cod
haul
1903 . None
426
4.8
None
36
1.9
1904
.
20
1523
16.1
None
133
6-5
1906
. 28
1133
11.5
8-9
143
7.6
included in Table 11. Dahl reinforced his own argument with further
hauls during July and August in Sbndeled and Helle fiords (Table 111).
The evidence is contradictory in some respects (e.g. the number of
fry liberated) and certainly inconclusive. Observations should have
been continued by a strictly impartial team for many more years.
TABLE 11. SUPPLEMENTARY DATA BY DANNEVIG ON TEE PRACTIC~L VALUE OF
COD-FRY LIBERATIONS IN NORWEGLAN FIORDS. (After Dannevig and Dahl,
1907)
1. Before planting of fry
Place and year
Stindeledfjord, 1903 .
. 426
1309
137
Hellefjord, ID03 + ID04 + 2 . 85
259
23
Stendalsfjord, 1904
.
. 464
99
131
TOTAL .
.
965
1667
291
-
-
-
-
__
-
11. After planting of fry
Place and year
~
~~
Sdndeledfjord. 1904 + 1906 +- 2 . 1328
1160
160
Stendalsfjord, 1906 + 1906 +- 2 . n66
230
197
TOTAL .
. 2326
1660
360
Hellefjord, 1905
.
143
180
3
-
-
-
-
-
-