44 FISH AND GAME COMMISSION. 



in such numbers that the fish have an abundance of food and are 

 increasing in size as well as producing a greater and better quality of 

 eggs. With these improved conditions, we recommend that the lakes 

 be posted early next season and all fishing prohibited in District No. 

 26, so as to allow the fish to increase in numbers great enough to 

 furnish a good portion, if not enough eggs, to supply Mount Whitney 

 Hatchery. 



TAHOE HATCHERY. 



The Tahoe Hatchery has been operated since the spring of 1921. 

 Owing to the extremely cold water and the small amount of dissolved 

 oxygen in the water the growth of the fry is very slow. While they 

 remain as healthy as the average fry in hatcheries, they lack the vitality 

 and do not develop as they do in water where there is a great amount 

 of dissolved oxygen. A plan was made to construct a pond where the 

 water of the springs could be collected and where aquatic plants could 

 grow and where the water would be exposed to the warming rays of 

 the sun and to conduct the water from the pond through an aerating 

 system so that when it reached the hatchery the temperature would be 

 higher and the water would contain a greater amount of oxygen. Funds 

 were provided for these improvements and the plans are made, so that 

 the work will be finished early this fall. 



The number of fish distributed from this station in the last two years 

 was 1,885,000. 



BLACKWOOD CREEK TANK SYSTEM. 



It was decided at a meeting held in Tahoe City during September, 

 1925, that a system of tanks was to be built on Blackwood Creek where 

 fry could be held until late in the fall, or over winter if deemed neces- 

 sary, so that they could get the benefit of the water from Blackwood 

 Creek where the temperature was higher and the oxygen content 

 greater, thus giving the fish a better chance to develop. Plans for these 

 tanks have been made and the ponds set aside for the construction of 

 these tanks and water supply. Work will be started during July and 

 rushed to an early completion, so that several hundred thousand fry 

 may be placed in the tanks in charge of an experienced fishculturist 

 in order that they may receive the proper care. 



TALLAC HATCHERY. 



This station has been operated as in former years. Eggs were col- 

 lected from the Taylor Creek, Upper Truckee River, and Blackwood 

 Creek traps and transported to this station to be eyed and a portion 

 of them hatched in this hatchery. The remainder were removed to the 

 Tahoe Hatchery, as the water in the Tahoe Hatchery, after July 15th, 

 is better suited for hatching eggs and raising the fish than at Tallac. 

 After the middle of July the water from Taylor Creek, from which 

 stream the hatchery receives its supply, is not suitable for hatchery 

 purposes, but in the spring and early summer this hatchery is an 

 important station for the purpose of eyeing the eggs collected from the 

 auxiliary station or traps, and hatching the first eggs for local distri- 

 bution. The interior of the building was overhauled and new troughs 

 installed in the fall of 1924. The exterior and cottage should be painted 



