NATURAL HISTORY OF THE QUINNAT SALMON. 
117 
Table showing the average amount of food in stomachs of young salmon from the 
various stations in May. 
Station. 
No. of 
speci- 
mens. 
Size. 
Larva?. 
Pupae . 
Winged 
insects. 
Terres- 
trial 
insects. 
Crusta- 
cea. 
Clastro- 
pods. 
Uniden- 
tifiable. 
No 
food. 
Para- 
sites. 
3.3 
9 
(a) 
(«) 
(«) 
3 
4 
2.9 
5 
10 
1 
(a) 
6 
2.0 
1 
3 
1 
(«) 
2.5 
3 
0 
3 
(a) 
(a) 
Red Blu If 
2.2 
i 
13 
(a) 
(a) 
(«) 
1 
1 
2.5 
6 
2 
(a) 
(a) 
2. 0 
4 
2 
(«) 
(<>) 
2 
2.2 
2 
2 
3 
2.1 
9 
8 
(«) 
3 
2.4 
9 
(a) 
(a) 
2 
2.3 
1 
4 
1 
2.4 
2 
(a) 
2 
1.9 
1 
2 
(a) 
(a) 
Rio Vista 
2.3 
i 
4 
(«) 
i 
Total 
60 
262 
381) 
60 
6 
2 
1 
0 
5 
Average 
2.5 
4.4 
6.5 
.1 
(«) 
(«) 
.1 
,i 
. i 
a Indicates an average of less. than one. 
Food in brackish water . — Relatively few specimens of young salmon have been 
obtained from brackish water, and the following table gives a list of the food found 
in nearly all that were caught: 
Station. 
No. 
Size. 
Amphi- 
pods. 
Cope- 
pods. 
Fish. 
Adult 
insects. 
Seeds. 
Para- 
sites. 
206 
1.8 
25 
207 
1.9 
+ 
208 
1.9 
1 
30 
209 
1.9 
100 
10 
210 
1.9 
1 
211 
2.2 
150 
15 
212 
2.7 
2 
100 
Total 
14.3 
3 
350 
81 
1 
Average - 
2.0 
+ 
50 
12 
1 213 
~ 2A 
2~ 
NT 
214 
2.3 
1 
13 
Benicia, May 13-20, 1898 
215 
2.5 
31 
216 
2.7 
1 
200 
1 
1 
| 217 
3.3 
1 
Total 
11.9 
200 
50 
1 
2.4 
1 
40 
10 
-f 
218 
1.6 
-f 
219 
2. 1 
2 
220 
2.4 
221 
2.4 
c 
222 
2.5 
8 
+ 
223 
2.8 
3 
+ 
224 
3.0 
2 
8 
225 
3.4 
1 
5 
Total 
20.2 
7 
8 
1 
53 
2 
Average 
2.5 
1 
1 
Summary for 20 brackisli-water specimens. 
Total 
15 
558 
1 
104 
3 
Average _ 
2.3 
1 
29 
9.2 
The chief food of the few brackish and salt water specimens studied were adult 
insects. Only 5 of the 20 specimens had fed to much extent on copepods, and only 
1 had eaten a fish; the species of the fish could not be determined, though it was 
evidently a smelt ( Osmerus ). No aquatic insects were found, such as were found 
in specimens from the lower river, which indicates that the fish had been in brackish 
water at least long enough to digest all fresh-water food. 
