BUEEAU OF FISHERIES XXVII 



250,170,300, representing an increase of practically 85 per cent over 

 that of the previous year. The following tabulation indicates the 

 production of the various groups of species: 



Summary of output 



Game species 205, 147, 000 



Commercial species (interior waters) 524, 120, 900 



Commercial species (anadromous) 304, 140, 100 



Commercial species (marine) 6, 511, 367, 000 



Miscellaneous species 25, 707, 300 



Total 7, 570, 482, 300 



While the above-mentioned increases were achieved partly through 

 more intensive and efficient utilization of existing facilities, several 

 new stations were placed in production. A limited distribution of 

 trout and bass was obtained at the Crawford (Nebr.) substation. 

 The new Valdosta (Ga.) and Fort AVorth (Tex.) substations furnished 

 miscellaneous warm-water fishes for distribution. During the year 

 the substation located at Creede, Colo., was constructed and a stock 

 of trout eggs secured for incubation, in addition to the operation of 

 several field egg collecting stations using this point as a base. 



During the fiscal year a steel distribution car with a capacity of 

 300 pails was completed by the builders. 



The development of a new pond-cultin-al substation at Tishomingo, 

 Okla., was initiated but owing to the (h^struction of a temporary dam 

 by a flood no fish-cultural work could be carried on. The work of 

 developing the bureau's fish-cultural plant hi the Yellowstone Tark 

 has continued, with the completion of the hatchery building and 

 living ({uarters. 



PROPAGATION OF COMMERCIAL SPECIES 



Marine species of the Atlantic coast. — The production of these sta- 

 tions accounts for the greater portion of the numerical output of the 

 entire fish-cultural service. Increases were recorded over the previ- 

 ous year's production of winter flounder, while the cod and haihhx'k 

 figures are slightly below those of 1929. The distrii)uti()n of 15,500,000 

 mackerel fry represents an expansion of work which has previously 

 been cairied on in a small way at the Woods Hole (Mass.) station. In 

 connection with the work with all of the nuu'ine species it was possible 

 to incubate the greater jxution of the eggs, planting the fish in the 

 fry stage and reducing the plants of eyed eggs. 



Pacific sahiion. — As a whole the output of the commercial species 

 of Pacific salmon was materially below that for 1929. The only 

 forms showing increased distribution were the hum|)back and steel- 

 head salmons. In the consideration of these activities it should be 

 borne in mind that there is a certain periodicity in the runs of Pacific 

 salmon which accounts for marked fluctuations in the hatchery 

 operations from year to year without signifying any jiarticular de- 

 crease in the stock of fish. For example, 1030 was a "pink salmon" 

 year in Puget Sound, increasing the distribution of hum])ba("k salmon 

 or ]nuk salmon from 1,852,000 ir^ 1929 to 0,302,000 in 1930. 



Anadromous species oj the Atlantic coast. — In contrast with the very 

 successful 1929 season with shad at the new F'ort Humphreys (Va.) 

 station, the 1930 output was virtually a total failure. While there 



