census on the opening day of the 1937 bass season, June 16. Only four legal-sized 

 fish were taken — two bass and two white crapples. Hundreds of thin white crapples 

 under legal length (8 Inches) were caught. Scales and measurements were taken from 33 

 of these small crapples and their ages determined by Dr. Hansen of the Survey. In 

 table 2 the lengths and ages of these fish are compared with the lengths and ages 

 which he found among 148 white crapples obtained when Sportsmen's Lake was poisoned. 



The poor hook-and-llne fishing In Lincoln Lakes Is one of the reasons the Logan 

 County Sportsmen's Club was given a small arm of the lakes to be diked off and used 

 as a hatchery pond, rearing pond or experimental area where methods could be worked 



TABLE 3.— FIRST FISH KILLED BY POISON 

 IN SPORTSMEN'S LAKE, MAY, 1938. 



out for the Improvement of fishing In the rest of Lincoln Lakes. While the evidence 

 Indicated that fish were scarce. It was thought desirable to clean out Sportsmen's Lake 

 with poison before any fish propagation activities were begun. 



FISH PREDATORS 



Animals which prey upon the fishes of Lincoln Lakes are herons, cormorants, king- 

 fishers, gulls, flsh-eatlng ducks, and a few turtles and gars that have migrated from 

 Salt Creek. It does not seem likely that these predators have noticeably affected the 

 fish population. 



TABLE 4, — COMPARISON OF FIRST AND SECOND POISONINGS 

 OF SPORTSMEN'S LAKE, MAY-JUNE, 1938. 



* See table 5 for a list of "fine" fish. 



