Temperature range wide, both above and below zero (-0.8 to 4.5°) young taken 

 in late August off the Yukon Mouth were taken at depths of 20 meters and a temp, 

 of 9.5° . The wide range of temperature and depth in which ^. quadrituberculatus 

 is found can be due to the migration to coastal spawning ground, the different 

 habits employed for spawning, feeding and in wintering. Feeding is varied, in 

 a trawl haul off Cape Piramidnogo (depth 96 meters, temp. -0.2°, on clay and 

 sand with some gravel) ripe individuals of this species were taken (males in 

 IV-V year class, females in IV year class) whose stomachs were full, having 

 large numbers of polycheats (Families Polynoidaej Terrebillidae and Nephthys) 

 Actinma (to 10 examples in one stomach), Gammaridae, and much rarer, mollusks 

 (Macoma). 



Measurements of 69 examples (st. 1 off Cape Piramidnogo) indicate the following: 



P. quadrituberculatus from Avachin Bay 



Total length, 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 No. of 

 cm. examples 



Males 



1 



22 69 32 42 



34 



Females 



13 13 



4433 13 43 11 35 



Total 



1 2 



2 3 9 10 6 2 



6 3 3 1 3 4 3 1 1 69 



Average length of males 42.21 cm 



Average length of females 47. 11 cm 



Average length of sexes combined 44 . 69 cm 



During the KRASNOARMEIETZ expedition (1933) ichthyologist K.I. Panin measured 

 66 examples of four tubercled flatfish from Anadyr Gulf with the results ranging 

 from 21 to 60 cm., average 34.5 cm. 



In southern areas this species may be a good resource for the commercial trawl 

 fishery. According to I. A. Polutov, the species occurs in Litke straits and Olutorsky 

 Gulf and along Koriak Land and in Anadyr Gulf but not in large banks. 



73 . Platichthys stellatus (Pallas) 



Very common on both coasts of Bering Sea, Commander Ids . , north to Chukchi 

 Sea (Kotzebue Sound) but absent in the arctic. It is replaced in the Atlantic by the 

 related P. flesus L. Prefers shallow waters, often occuring in brackish conditions. 

 In the spring approaches m great numbers coasts and river mouths . We found it in 

 Avacha Bay and along the coast of Koriak Land. 



47 



