PROGRESS IN BIOLOGICAL INQUIRIES, 1933 347 



During- tlio Hsliin<j: season of lOIW (June 1 to Sept. ;5()) 101 belly 

 Uig;s and 7 opercle ta<^s were recovered from 2,4i>9 of the former and 

 1,470 of the latter aftixetl to si)awnin<^ herrin*^ released at Jamestown 

 Bay (Sitka) between April 21 and April 25, 1933. All of these tags 

 were recovered around Cnpe Ommaney, between Larch Bay and 

 Port Alexander, giving the first definite proof of a migration of 

 some length, as it is api)roximately 60 miles by water from James- 

 town Bay to Port Alexander. 



On the other hand, out of 99G belly tags and 824 opercle tags 

 affixed to herring released at Cape Bendel, just under 60 miles from 

 Port Alexander, on August 17, 1932, no tags have been recovered. 

 This mav be considered rather definite evidence of a lack of migra- 

 tion between Cape Bendel and Cape Ommaney. 



In another tagging experiment at Auke Bay near Juneau, 800 belly 

 tags and 772 opercle tags were affixed to spawning herring released 

 on May 3, 4, and 5, 1933. No recoveries have been made supporting 

 the previous conclusion of a lack of migration between Juneau and 

 Cape Ommaney. 



The recovery in the Jamestown Ba}^ (Sitka) tagging experiment 

 of 4 percent of the belh?^ tags and only one-half of 1 percent of the 

 opercle tags clearly demonstrates the superiority of the former. 

 The maxinuim lengths of time elapsing from time of tagging to time 

 of recovery Avere 149 days for belly tags and 147 days for opercle 

 tags. However, when the fishing season ended on September 30, 

 1933, the belh' tags were being returned at approximately the same 

 rate as at the beginning of the season so that the recovery of more 

 1933 tags is confidently expected in 1934. 



The tagging experiments represent the first successful attempt at 

 tagging a clupeoid fish, and it is likely that this method can be 

 applied to the sardine, the menhaden, and other clupeoids. 



INA-ESTIGATIOXS CONCERNING THE PROTECTION OF MIGRATORY FISH AT 

 POWER DAMS ON THE COLUMBIA RIVER 



Grand Coulee Dam, investigation. — It is proposed to construct a 

 dam approximately 370 feet in height across the Columbia River at 

 the Grand Coulee. This site is some 140 miles upstream from the 

 Rock Island Dam and approximately 150 miles south of the Cana- 

 dian border. 



J. A. Craig and Harlan B. Holmes were detailed to make a study 

 of the possible effect of this dam on the salmon and trout of the 

 Columbia River. The number of salmon and steelhead trout pass- 

 ing over the Rock Island Dam were counted from July 21 to August 

 27, inclusive. A survey was then made of the spawning streams 

 between Rock Island and the Grand Coulee site so that an estinuite 

 of the number of fish spawning between the two locations could be 

 made. All available data were collected on the magnitude of the 

 runs at points above Grand Coulee. From these data it was esti- 

 mated that the run which would be intercepted b}' the Grand Coulee 

 Dam may be as small as 5,000 to 15,000 chinook salmon and an unde- 

 termined number of steelheads. 



Recommendations for the protection of these runs were submitted 

 to the Fish and Game Commissions of Washington and Oregon for 



