— 195 — 
a manner as to permit of each separate size group in every sample being directly compared 
with the corresponding group in every other, will furnish a distinct view of the effect 
of varying conditions of nourishment upon all the individuals in the samples. 
Cod liver; average weights in gr. 
= alle le TANT TT Sire Tate 
es OCD Steen TCT Se 
ag | 1 
aaa |s/2/8/S/8\e|2)/8)8)2/8/8| 8 4) a)" 
= - 
&| Sorvagen 23. IV.. | 249 |..|..| ..127| 23| 44 60 85 1124 1200 180 270| 400 570 |890| 90 gr. 
3) Bes WAS SEVIS ss 206 |..|..| ..|41| 59] 98 |115 1146 |240 |330 |319 1264 | 426 610 |710 120 - 
4 
a( Medfjord 7. V.... | 184 |..|40| 45 55 82111 140 206 |235 1343 1281 442 | 680 ... OP 
5| Honningsvag 6. V. | 199 |..|..| 47) 63) 83/110 1130 1217 |331 |350)... |... |. 131 - 
2 Honningsväg 9.V. | 82 |....\..|..| 901117123 216 238 |308 1830 |. eee 1153 - 
| Baadsfjord 24. V.. 97 | 22/33) 4965 [114 |125 1133 [231 1255 315... |... | ... |... oe = 
Fl Vardö 21.V...... 100 |..|..| .. | .. | 93132 |207 |294 |376 |478 660 1810 1150|... |... | 369 - 
The table above gives an illustration on these lines, furnishing as it does a com- 
parison both of the different size groups in each sample and of the same size groups in 
all. The greatest interest here naturally attaches to consideration of those sizes which 
experience has shown to be most numerously represented among the full grown cod, 
viz., the groups from 65—90 cm. It will be noticed that there is a great difference between 
the two Lofoten samples on the one hand, and all those from Finmarken on the other, 
the former exhibiting far lower weights, lowest of all in this respect being the spent fish 
from Servaagen. Even when taking into consideration the considerable fluctuations 
here discernible within one and the same size group, these are however, still found to 
be far slighter than the differences noticeable between the size groups themselves. The 
difference between the average weights for one and the same size group in different sam- 
ples in no case exceeds 300 %, whereas far greater fluctuations are apparent between 
one size group and another. 
Quantity of liver for the different size groups. 
The figures given in the table above for the average weights naturally furnish 
a very simple means of calculating the quantity of liver for each separate size group in 
the different samples, or in other words, how many hectolitres of liver may be obtained 
from 1,000 fish of each size group. On the basis of such calculations, also, the curves 
for the quantity of liver in the 5 cm. groups of the different samples may be drawn. This 
has been done in Fig. 122, four samples being here selected, two consisting of Lofoten 
skrei and two of Finmark fish. All four curves exhibit, on the whole, a very similar 
course, with a very noticeable increase according to the size of the fish. The curves 
he, however, at different parts of the scale; the skrei samples exhibit the smallest quan- 
tity of liver for all groups, the Finmark samples being highest in this respect. The dif- 
ference between the Finmark samples and the sample of skrei from Rost, which was 
taken in the first half of April, is not, however, very great. From this we may conclude 
that the greatest “depreciation” in the quality of the cod takes place during their stay on 
the Lofoten banks, where the genital organs arrive at full maturity, and spawning takes place. 
25* 
