PROGRESS IN BIOLOGICAL IISTQITIEIES, 1923. 9 



volving. besides, a large loss in trout eggs thrpugh -tlie destruction. ot 

 the breeding fish. - • ■ • , . . ; . 



The pelican represents a strange and interesting ancient type of 

 bird life and it is not desired to exterminate it in the Yellowstone 

 Parlv. wliere it is of much interest to tourists. Measures have been, 

 recommended, however, for the regulation of its numbers througli 

 the destruction, by proper authorities, of a percentage of the eggs 

 deposited on the breeding grounds in the park. The recommenda- 

 tions are now under consideration by the Bureau of Fisheries and the 

 National Park Service. 



It Avas originally suggested that attention be directed rather defi- 

 nitely to the pi'oblem pi'esented by the parasites of the pelicans and 

 of the trout in Yellowstone Lake. Some data were secured on this 

 point, but the general problem of the destructiveness of, the birds, 

 with respect to the trout was considered to be of such immediate 

 importance that the question of parasites was temporarily relegated, 

 to the background and was not made the sub.ject of special attention. 



rACIFIC COAST AND ALASKA. 

 ALASKA SALMON. 



Especial attention was given during the summer and fall of 1922 

 to a study of the salmon in the Alaska Peninsula fisheries reservation. 

 The work was conducted by Dr. C. H. Gilbert, of Stanford Univer- 

 sity, and Willis H. Rich, assisted by W. P. Studdert. During June 

 and July 4.000 red salmon were tagged with numbered aluminum 

 tags in an effort to learn something of their migrations. The re- 

 sults of this experiment were striking and gave information of the 

 greatest value. A report was prepared by Doctor Gilbert and has 

 been published. 



The tags were attached at four localities near the end of the Alaska 

 Peninsula, where several large canneries are located. Of the 4,000 

 tags attached. 861 were put on at Unga Island, 200 in Morzhovoi 

 Bay, 2.300 in Ikatan Bay, and 639 in the vicinity of Port Moller. 

 A total of 709. or 18 per cent, was reported recaptured either in the 

 vicinity where tagged or at more distant points. 



Of the 639 fish tagged near Port Moller 174 were recaptured, all 

 of them close to the point where they had been liberated after tag- 

 ging. It is evident that the Port Moller fishery is sustained largely, 

 if not entirely, by local runs. 



The general trend of the migration of the fish tagged in the 

 vicinity of Unga Island was to the westward. Furthermore, they 

 proceeded directh' to Morzhovoi and Ikatan bays without entering 

 on their way the minor red salmon streams to be found along the 

 southern side of the peninsula. A few of these fish moved east- 

 ward along the south shore of the peninsula, one being captured at 

 the mouth of the Ozernoi River and four on the eastern shore of Cook 

 Inlet. Other captures Avere reported from Bristol Bay. 



The results obtained in Ikatan and Morzhovoi Bays indicated an 

 extensive movement of salmon back and forth between these two 

 bays. A purely haphazard movement of the fish seemed to be in- 

 dicated. It was made abundantly clear that Ikatan and Morzhovoi 

 Bays form parts of the same fishing grounds and deal with the same 



