96 



DEPARTMENT OF FISH AND GAME 



Inlet to a high Sierra lake, Rose Lake, Fresno County. The improve- 

 ment of such streams is a function of our experimental back-country 

 fish management crew working on Dingell-Johnson Project F-3-R. 



However, even in the case of waters for which we had good initial data 

 on which to base a policy, we soon found that initial surveys were not 

 enough for continuous management. Ten years after a survey had been 

 made, some factor such as fishing intensity may have changed so much 

 that the original yearly stocking allotment no longer provided good fish- 

 ing. Or, our original choice of species or estimate of the number of trout 

 to be planted may have been faulty and should have been changed. But, 

 and this is one of our basic problems, we usually didn't know that the 

 policy should be changed, simply because we hadn 't visited the lake again 

 and because no one had told us that the lake needed attention. 



Now, if you have only a few lakes to manage you can check them fre- 

 quently and adjust your management to changing conditions. But our 

 problem lies in trying to manage hundreds of waters without having 



