54 SALMON AND TROUT IN ALASKA. 



could be identified being sand launces; 2 contained young sticklebacks, 

 one of them 10 individuals; 2 had isopods, and only 3 had taken 

 insects from the surface. Another example taken later, a male of 

 265 mm., contained 4 small herring. 



At Karluk young cohos are occasionally taken in the cannery 

 seines; two, 180 mm. long, preserved from the catch of June 8, con- 

 tained 2 species of amphipods and one a young cottoid; one, 158 mm., 

 preserved from the seine July 3, was an empty female ; July 24, another, 

 175 mm. long, contained Ammodytes. As will be seen, these records 

 indicate the presence of very few young cohos about Karluk Beach. 



The general collections of the Albatross afford the following data: 



A number of cohos were taken at Karta Bay with larger sockeyes 

 and smaller dog salmon on June 26, 1897. Of the specimens preserved 

 8 males average about 80 mm. (56-100), and 14 females average 

 nearly 100 m.m. (80-140). They were feeding mainly on insects and 

 Crustacea. 



At Thorne Bay, July 5, of a number of small cohos together with 

 a few dog salmon, seined probably at the mouth of the river, 24 

 males averaged about 55 mm. and 50 females about 56 mm., the 

 high average of the latter being due to the i)resence of a few slightly 

 larger individuals (extremes, males 45-65 mm., females 45-78 mm.). 

 The stomachs examined contained insects for the most part; a few 

 had small crustaceans and 2 had flatfishes. 



At Port Alexander, July 3, 1903, many young cohos were taken 

 in the seine; 4 males and 2 females were preserved; average about 

 150 mm. They were feeding on young herring and sand launces, 

 also larval crabs and amphipods. 



Of the specimens saved from Uganuk, June 15, 1903, 5 are males, 

 averaging 138 mm., and 8 females, 130 mm. All but 3, which were 

 empty, were feeding on young herring, each containing from 1 to 5 

 individuals. (See p. 51-52.) 



At Unalaska 6 examples, taken July 23, 1888, average 148 mm., 

 contained insects, crustaceans, grubs, and in one case a small fish 

 like a salmon fry. One humpback fingerling was in tliis lot. 



TweJve. examples, taken at Sumner Harbor July 2, 1896, averaged 

 about 60 mm. and were feeding on insects and Crustacea. They 

 were in company with the smaller sockeyes. (See p. 50.) 



Isolated examples in the collection, not worthy of fuller notice, are: 

 1, Kilisut Harbor, July 1, 1903; 5, Tribune Bay, May 17, 1894; 3, 

 Union Bay, British Columbia, June 22, 1903; 3, Cleveland Passage, 

 July 13, 1903; 1, Pavlof Harbor, July 25, 1903; 1, Humboldt Harbor, 

 Shumagin Islands, July 31, 1888; 3, New Morzhovoi, July 17, 1894, 

 and 2, Kiska Island, June 7, 1894. 



From the above data it is seen that the cohos remain for some 

 months about the shores near the streams whence they issue. They 



