382 U. S. BUREAU OF FISHERIES . 



since the bun^aii began to operate at this point. Parasitism by gyrodaetylus 

 caused trouble with the fingerlings at this substation. Heavy rains in June 

 cau.sed tlie water to rise and resulted in the loss of some fingerlings. It is 

 po.ssible, also, that a few of the larger fish escaped. At this station horse 

 meat was fed instead of the usual sheep liver. 



Langdon, {Mo.) substation. — The number of warm-water fish obtained from 

 the ponds at this station exceeded that of the previous year, but it did not 

 e»iual earlier records. This may be due partly to the fact that the ponds were 

 flooded in August, during which time many fingerlings escai^ed. 



White Sulphur Springs (W. Va.) Station 

 (EDWAitD M. IlAYNES. Supcrlul eodf lit ) 



The year's work reached a new high level in the number of eggs and fish 

 handled, which totaled 6,238,000 and was 1,410,000 in excess of the number 

 handled in the previous year. No changes or expansions of importance were 

 made to the plant. The painting of most of the buildings constituted the most 

 important w(.>rk in the way of routine maintenance. One cooperative trout 

 nursery was operated under the supervision of this station. The usual coop- 

 erative arrangement with the State of West Virginia, whereby the bureau 

 incubated over 1,000,000 eggs for the State in return for a share of the fry, 

 was continued. Virtually all the brook-trout eggs handled were purchased or 

 received by exchange. From the 2,400,000 received, 2,000,000 fish were had for 

 distribution. Some feeding experiments with brook trout were conducted. 

 The station has built up a brood stock of Loch Leven trout, which supplied 

 over 375,000 eggs of high quality. A shipment of this species from the Boze- 

 man (Mont.) field was handled for the State of AVest Virginia, and some 

 were kept to meet the bureau's needs. The Loch Leven brood stock will be 

 increased until it is large enough to take care of the needs of this station. 



All rainbow-trout eggs were taken from the station brood stock, which has 

 been built up so that it yields over 3,000,000 eggs. The eggs are secured from 

 2, 3, and 4 year old fish. The quality of the eggs was hardly up to that of 

 former years, but a good output of fish for distribution was attained and a 

 number of egg shipments were made, including four to Costa Rica, Peru, 

 Switzerland, and Germany. A noteworthy carload shipment of 315 pails, 

 carrying 465,000 fish, was made during the distribution of the fish belonging to 

 the State of West Virginia. 



The pondfish work was again affected by extreme variations in the weather. 

 A moderate production of rock bass of the previous season's hatch was secured 

 during the fall distribution. As has been the case for several years, there was 

 no production of sunfish of any consequence in spite of every effort to secure 

 them. The same unfavorable climatic conditions affected the production of 

 bass, limiting the spring distribution to about 32.000 fish. It is believed that 

 at least 20 nests were lost from this cause. It is hoped that a fair stock of 

 fingerlings remains in the ponds. 



Wythe\'illb (Va.) Station 



(C. B. Grater, Superintendent) 



The usual work of keeping the station and grounds in goo<l condition was 

 done by the station force. This work would have cost about $2,000 if it had 

 been performed by employees especially hired for the purpose. Considerable 

 success attended the fish-cultural work, and an unusually large number of 

 rainbow-trout eggs of high quality was obtained. The season's work was 

 marked by the absence of an outbreak of octomitiasis, which usually appears 

 during the spring. Consequently, an excellent stock of fry and fingerlings was 

 obtained. An epidemic of octomitiasis attacked the yearling fish retained for 

 brood stock. After thorough sterilization of equipment the trouble seemed to 

 have been checked, but it was necessary to replace the lost fish with 3,000 from 

 the Erwin (Tenn.) station. There was also some loss of adult brood fish during 

 the spawning season due to an attack of furunculosis. Treatment with 

 potassium permanganate served to abate this in some degree. 



This station has engaged in the development of cooperative nurseries in con- 

 junction with the State of Virginia, and several of the.se units were established 

 and supplied with fish, while sites for several others were inspected. Fish 



