76 REPORT OF COMMISSIONER OF FISH AND FISHERIES. 



of the station was taxed to its utmost it was necessaiy to discontinue 

 collections. The rack was at once opened, that the remaining salmon 

 might have free passage to the upper waters for spawning. A large 

 portion of the rack was saved and stored for future use. The total 

 loss of eggs w^as 1,347,850. or abovit 13 per cent of the entire collection. 



The females were spawned in the same manner as that practiced 

 throughout the Columbia River territory, except that after the greater 

 portion of the eggs had been removed an incision was made in the 

 belly of the tish, the eggs shaken free from the enfolding sac, and 

 then pressed from the vent. In this manner the egg take was added 

 to materially, but the eggs thus taken were not of the best qualit3\ 

 On November 10, after a period of incubation of tifty days, the eggs 

 began hatching, and owing to lack of space it became necessary to 

 plant the greater portion of the fry as soon as they hatched. 



With the view to affording them as nmch protection as possible, a 

 series of dams was thrown across the small branch leading from the 

 hatchery to the Clackamas, it having first been cleaned, and into the 

 small ponds thus made throughout its length the fry were liberated. 

 By eTanuary 1 over 6,000,000 fry had been planted, and the balance, 

 2,412,000, were held in troughs and outside tanks to be reared for a 

 time upon artificial food. In each tank 36,000 fry were placed and in 

 each trough 18,000, but on January 9 it was necessarj^ to thin them 

 out b}" distribution, leaving 15,000 in each tank and 5,000 in each 

 trough. The fry loss for the year amounted to 128,866, or 1.48 per 

 cent of those hatched. 



During September and October 220,000 ej^ed quinnat-salmon eggs 

 were received from the Oregon Fish Commission. Of these, 10,000 

 were loaned to the Portland Carnival in connection with its exhibit 

 and 175,472 fr}^ hatched from the remainder were planted in the 

 Clackamas River. 



In February 900,000 white-fish eggs were received from the North- 

 ville, Mich., Station, and after being successfully hatched the result- 

 ing fry, numbering 750,000, were planted in Lake Sequalitchew, 

 Washington, 



In July and August the rainbow and brook -trout fry carried over 

 from the previous year were planted under the direction of the Oregon 

 Fish and Game Association. 



In one of the rearing-tanks 20 quinnat salmon had been held until 

 18 months old, and on June 26, 1902, copper .tags were placed upon 

 them and they were liberated in the Clackamas River. 



At the request of the committee in charge a model salmon hatching- 

 house was installed as an exhibit at a carnival held in Portland, Oreg. 

 All the equipment used was made one-third the regular size and was 

 furnished by the committee. The Conmiission loaned cans, packing, 

 and such other articles as could be spared. Tiie installation of this 

 exhibit was under the direction of the superintendent until completed, 



