128 
BULLETIN OF THE UNITED STATES FISH COMMISSION. 
of the same length being taken as a basis in each case. The males were weighed at 
Battle Creek October 29, the females at Mill Creek November 15. 
Fourth, similar weights, averages, and losses of spent fishes, taken either before 
or immediately after death. Specimens found between October 10 and November 30. 
In determining the percentage of loss in the weight of males no account is taken 
of the loss of milt in spawning, which is very slight, the average total weight of the 
spent fishes or those just arrived at Battle Creek being compared with the average 
total weight of Black Diamond specimens of the same length. 
Stomach, pyloric appendages, and intestine of two salmon from upper Sacramento River drawn to scale. J?, Bat 
Creek, October 20, 1900, a spent female. Jr’ Battle Creek, September 15, 1900, a male dying on spawning-grounds. 
Table of average weigh ts of male salmon. 
At Black Diamond. 
On arrival at Battle Creek. 
Spent fishes. 
Length, centimeters. 
N umber 
of speci- 
mens. 
Weight. 
N umber 
of speci- 
mens. 
Weight. 
Loss, per 
cent. 
N umber 
of speci- 
mens. 
Weight. 
Loss, per 
cent. 
44 
1 
2,200 
9 
1,905 
13 

45 
1 
2, 030 
2 
1,905 
24 
46 
1 
2,580 
9 
2; 375 
8 
47 
1 
2,080 
4 
2, 198 
18 
48 
3 
3,057 
2, 439 
20 
49 
3 
3,167 
3 
2,700 
15 
1 
2,890 
2,770 
9 
50 
1 
3, 060 
1 
9 
51. .. 
2 
3; 720 
2 
2,928 
21 
52 
1 
3,910 
4,100 
1 
1,630 
61 
53 
1 
2 
3, 303 
17 
2 
5,295 
6,220 
2 
4,025 
24 
60 
2 
1 
5, 495 
5,510 
61 
2 
6, 455 
1 
15 
63 
4 
7,236 
2 
5,533 
5,980 
23 
20 
64 
3 
3 
7,378 
1 
65 
8,040 
1 
6,970 
8.870 
13 
75 
2 
12, 390 
1 
28 
1 
8,535 
30 
76 
4 
12,855 
1 
10,950 
15 
78 
5 
13, 192 
2 
10, 768 
10,015 
18 
79 
3 
1 
16,797 
1 
40 
80 
15,360 
2 
13,707 
11 
81 
1 
13; 415 
16,135 
1 
10,770 
11,250 
20 
82 
1 
33 
83 
1 
15,670 
2 
14,175 
15,040 
l7, 665 
10 
84 
2 
17,010 
1 
12 
89 
1 
18,490 
1 
10 
Average 
16 
26 
