REPORT OF COMMISSIONER OF FISH AND FISHERIES. 135 



and at intermediate points in the Sacramento basin. Most of the 

 time was spent at Baii-d hatchery, where there was an al)undance of 

 material and where the superintendent, Mr. Lambson, and the foreman, 

 Mr. Wallich, rendered vahiable assistance. 



INTRODUCED FISHES IN UTAH AND IDAHO LAKES. 



Continued public interest in the planting- of the Great Lakes white- 

 fish {Co7'egonus dupelforinis) in Bear Lake (Idaho and Utah), Coeur 

 d'Aleue Lake (Idaho), and Pend d'Oreille Lake (Idaho), induced the 

 Commission to make another effort to determine the results of the 

 plants of fry in these waters a number of years ago. Accordingly, in 

 Jul}^, 1901, a party, consisting- of Mr. S. P. Wires, superintendent 

 of the Dulutli (Minnesota) hatchery; Mr. S. L. Pritchard, of the 

 Washington office, and Mr. D wight E. Miller, was dispatched to these 

 lakes with an equipment of gill nets of various sizes, seines, and other 

 appliances. Fishing was carried on in Bear Lake (and Mud Lake con- 

 nected therewith) at ten different points and during six da} s; in Lake 

 Coeur d'Alene at thirteen different points and during eight daj-s; in 

 Pend d'Oreille Lake at nine different localities and during six days. 

 No introduced white-fish were discovered, and no evidence of the 

 existence of this species in any of the lakes was obtained, although 

 three other species of introduced fishes were found. 



The water of Bear Lake is reported to be very hard, unfit for 

 domestic use, and possibly unsuited to the white-fish of the Great 

 Lakes, although Williamson's white-fish {Co-regonus vyilUamsoni) is 

 found in it. During the first week in August the surface tempera- 

 ture of the water in the vicinity of Fish Haven was found to be from 

 69'-' to 71°. The minimum bottom temperature determined was 50°, 

 at a depth of 105 feet; fishing, however, was carried on in water 175 

 feet deep, but no temperature data were obtained therefor. Suckers 

 {Catostomus macroclieUus) and chubs {Leuckcm lineatm) abound and 

 are the characteristic fishes of the lake; black-spotted trout {Sahno 

 clarhii) also occur. Mud Lake is reported to be little more than a 

 marsh during July and August, although it contains some black bass, 

 carp, and a few black-spotted trout. 



The water of lakes Coeur d'Alene and Pend d'Oreille is deep and 

 cold, resembling in every respect that of the Great Lakes; and it 

 would seem that the white-fish whose introduction has been attempted 

 should do well in both of them. Besides Williamson's white-fish, 

 man}^ fine specimens of bull trout {SalveUnus parkei) 11 to 12 inches 

 long and of the black-spotted trout were found in both these lakes, 

 and suckers {Catostomus macrocheihts unA C. catostomus) are abundant. 

 The introduced species, large-mouth })lack bass and 3"ellow perch, seem 

 to have become well established in Lake Coeur d'Alene; examples of 

 the latter 10^ inches long were obtained. 



