The fish populations of 42 Iowa ponds have been estimated for various reasons in the last 10 years by the Iowa Cooperative Fisheries Research Unit (Table 1). Although the data on some of the ponds have already been published (Fessler, 1950; Fredin, 1950; Carlander, 1951, 1952; Ruhr, 1952; Lawrence, 1952), it seems desirable to summarize the results. Most of the estimates were made by the marking and recapture technique. The pond was seined with a 50 to 70 foot seine and all fish were marked by clipping off a fin and were returned to the pond, until about one-third of the fish taken in the seine hauls have already been marked. In ponds under 1/2 acre, 2 or 3 good seine hauls were usually sufficient. Further seining was then delayed until at least the next day to permit the marked fish to redistribute themselves.
Proceedings of the Iowa Academy of Science
©1956 Iowa Academy of Science, Inc.
Carlander, Kenneth D. and Moorman, Robert B.
"Standing Crops of Fish in Iowa Ponds,"
Proceedings of the Iowa Academy of Science, 63(1), 659-668.
Available at: https://scholarworks.uni.edu/pias/vol63/iss1/74