KEOKUK DAM 
103 
Table 3. — Record of fish taken on upper gate of lock at Keokuk, Iowa, by weeks, 1916 
Week 
Total 
lock- 
ages 
during 
week 
Gar 
Shad, 
her- 
ring, 
and 
moon- 
eye 
Buffalo 
fish 
and 
quill- 
back 
Ger- 
man 
carp 
Spotted 
catfish 
Crap- 
pie 
Sun- 
fish 
Pike 
perch 
Striped 
bass 
Fresh- 
water 
drum 
Other 
species 
Total 
fish 
during 
week 
Mar 19 to 25 
1 
1 
12 
13 
5 
31 
31 
15 
2 
1 
3 
6 
15 
1 
17 
1 
2 
21 
16 
1 
21 
2 
24 
26 
3 
4 
27 
4 
1 
3 
2 
5 
49 
26 
3 
36 
2 
2 
7 
1 
56 
May 7 to 13 
24 
16 
10 
15 
1 
1 
1 
1 
3 
1 
49 
16 
8 
1 
1 
1 
11 
21 
17 
4 
3 
1 
6 
31 
26 
29 
7 
2 
4 
2 
44 
25 
34 
14 
18 
2 
6 
1 
75 
23 
32 
7 
15 
3 
7 
64 
49 
22 
6 
15 
5 
14 
9 
2 
73 
35 
31 
3 
25 
12 
14 
3 
88 
38 
44 
18 
35 
185 
5 
1 
3 
291 
48 
34 
13 
54 
664 
8 
2 
2 
1 
3 
781 
36 
34 
1 
14 
498 
16 
3 
27 
4 
3 
600 
32 
10 
1 
13 
202 
18 
1 
1 
7 
253 
July 30 to Aug. 5 
46 
37 
21 
15 
2, 134 
16 
21 
i 
1 
i 
20 
3 
2, 270 
52 
17 
14 
6 
C, 666 
6 
11 
2 
1 
23 
3 
6, 749 
41 
14 
20 
i 
2, 972 
6 
10 
2 
1 
34 
3, 060 
2 
1 
2, 129 
4 
12 
1 
11 
2, 160 
47 
3 
. 2 
4 
1, 779 
4 
11 
17 
l' 820 
40 
7 
10 
9 
558 
6 
15 
2 
47 
'654 
Sept. 10 to 16 
29 
2 
10 
5 
150 
5 
9 
1 
1 
32 
215 
39 
2 
8 
4 
58 
8 
15 
1 
1 
116 
213 
Sept. 24 to 30 . 
26 
2 
28 
6 
4 
2 
38 
1 
81 
36 
7 
3 
27 
2 
9 
4 
68 
120 
Oct. 8 to 14 
28 
3 
13 
3 
3 
4 
29 
55 
Oct. 15 to 21 
32 
1 
3 
1 
13 
3 
3 
7 
31 
41 
1 
1 
2 
2 
1 
1 
4 
12 
37 
2 
2 
6 
2 
7 
11 
30 
40 
7 
5 
24 
3 
4 
12 
1 
56 
30 
2 
1 
1 
4 
35 
2 
1 
5 
2 
10 
11 
1 
4 
5 
Dec. 3 to 9 
11 
Dec. 10 to 16 1 
1 
Total 
1,152 
404 
207 
371 
18, 134 
145 
45 
37 
10 
560 
24 
20, 105 
1 No fish. 
During 1915 the average catch per lift of the gate was 2}i fish. During 1916 
the German carp was remarkably abundant in the vicinity of Keokuk, and this 
abundance was represented in the catch on the gate but at a later time than the 
spawning season. (Coker, 1930.) The average number of carp taken per lockage was 
15.7 ; the average number of fish of all other species was 1.7. The records seem to show 
that the number of fish taken on the gate is no more than should be expected of such 
a device, particularly when it is recalled that the water in the lock is set into violent 
turmoil just before the gate is lowered. Evidently the lock transfers a few fish one 
way or the other, generally irrespective of the migratory movements of the fish. 
It is possible, however, that certain migratory movements are faintly reflected in 
the catch on the gate. 
In 1926 lock masters Heule and Harrington informed the author that very few 
fish were now seen on the gate as compared with conditions in former years. Seven 
lockages were witnessed by the author or a member of his party on August 23, 1926, 
the total catch being 1 sheepshead, 5 fiddlers, and 4 sunfish, or 1.4 fish per lockage. 
While this seems a very low figure, it will be observed that it compares very closely 
with the record for 1916, excluding carp; furthermore, identically the same figure is 
obtained when the catches of the week of August 22 to 28, 1916, are averaged — 75 
fish in 52 lockages, or 1.4 fish per lockage. 
