66 U. S. BUREAU OF FISHERIES. 



bureau has not felt warranted in asking Congress for special funds 

 for this purpose in recent years. 



The species of fish propagated at this station during the year 

 included brook trout, rainbow trout, yellow perch, and pike perch. 

 Brook-trout egg collections from the brood stock amounted to 

 260,000. The losses on these eggs during the incubation period, and 

 again just prior to the absorption of the food sac, were so heavy 

 that only 185,000 fry were produced and only 105,000 reached the 

 fingerling stage and were distributed. The mortality is believed to 

 have been largely due to the advanced age of the brood fish, which 

 had been on hand for seven or eight years. With the view of 

 remedying this defect, 500 fingerlings are now being reared at the 

 station, and they will eventually replace the old brood stock. In 

 addition to the brook-trout eggs collected, 88,900 eyed eggs were 

 purchased from a commercial hatchery in Massachusetts, and from 

 them a 98 percentage of fry was realized. All of these fish were 

 distributed in waters in Massachusetts, Connecticut, and New York, 



Fifty thousand eyed rainbow-trout eggs, transferred from the 

 bureau's station at White Sulphur Springs, W. Va., were incubated 

 with a 7 per cent loss, and 5,000 of this species collected from the 

 station brood stock yielded a hatch of 43 per cent. As was the 

 case with the brook trout, the advanced age of the parent fish was 

 no doubt largely responsible for the inferior results, and on per- 

 mission from the Washington office the brood rainbows were planted 

 in Massachusetts waters. 



Two hundred thousand yellow-perch eggs, transferred in an ordi- 

 nary 10-gallon shipping can from the S wanton (Vt.) station, were 

 incubated, and the fry were delivered to applicants in good condition. 

 A further consignment of 3,300,000 eyed pike-perch eggs was trans- 

 ferred from the Swanton hatchery, and, though the station is not 

 equipped for handling such eggs, 90 per cent of them produced fry, 

 all of which were furnished to applicants. 



CRAIG BROOK (ME.) STATION. 

 [.T. D. De Rochbr, Superintendent.] 



That part of the fish-cultural work of this station addressed to 

 the Atlantic salmon is discussed in connection with anadromous 

 fishes of the Atlantic rivers on page 55. 



During December, 1921, two consignments of eyed brook-trout 

 eggs were received from commercial hatcheries, one in Maine and 

 one in Massachusetts, and a third consignment was forwarded from 

 Grand Lake Stream, Me., this comprising part of a shipment of 

 eggs previously made to that point by the Pennsylvania Department 

 of Fisheries. The eggs derived from the Massachusetts establish- 

 ment produced a hatch of over 96 per cent and those from the Maine 

 commercial hatchery of 91 per cent, while only 88 per cent of fry 

 resulted from the Grand Lake Stream shipment. 



From a consignment of 50,000 rainbow-trout eggs transferred from 

 the White Sulphur Springs (W. Va.) station a hatch of about 93 per 

 cent resulted. The output of the station was further augmented by 

 the receipt of 70,000 eggs of the landlocked salmon from the Green 

 Lake (Me.) station, which were incubated with a loss of about 4 per 

 cent. All of the fry of the various species were distributed in New 

 England waters, principally in Maine. 



