rhessodon and, therefore, is not useful in distin- 

 guishing it from other species. 



Acknowledgments 



For their advice and instruction, I thank Robert 

 J. Lavenberg and H. Geoffrey Moser. Gary D. 

 Brewer and Gerald E. McGowen gave advice and 

 field and laboratoiy assistance, and provided speci- 

 mens. Brian White, Marty Meisler, Marianne 

 Ninos, Layne Nordgren, A. Kubo. Delaine Wink- 

 ler, Sarah Swank, Scott Ralston, and Tina Beh- 

 rents assisted in the field collection of eggs, larvae, 

 and adult clingfishes. Michael H. Horn, Robert J. 

 Lavenberg, H. Geoffrey Moser, and Sally L. 

 Richardson greatly enhanced the manuscript 

 through their critical reviews. 



Literature Cited 



AHLSTROM. E. H. 



1965. Kinds and abundance of fishes in the California Cur- 

 rent region based on egg and larval surveys. Calif Coop. 

 Oceanic Fish. Invest. Rep. 10:31-52. 

 BRIGGS. J. C. 



1955. A monograph of the clingfishes (order Xenop- 

 terygiii. Stanford Ichthyol Bull. 6:1-224. 

 DOVEL, W. L. 



1963. Larval development of clingfish, Gobiesox 

 strumosus, 4.0 to 12.0 millimeters in total 

 length. Chesapeake Sci. 4:161-166. 

 HORN, M. H., .'^ND L. G. ALLEN. 



1976. Numbers of species and faunal resemblance of 

 marine fishes in California bays and estuaries. Bull. 

 South. Calif Acad. Sci. 75:159-170, 



MARLIAVE. J. B. 



1976 The behavioral transformation from the planktonic 

 lar\'al stage of some marine fishes reared in the labor- 

 atory. Ph.D. Thesis, Univ. British Columbia, Van- 

 couver. 231 p. 



Miller, D. J., and R. N. Lea. 



1972. Guide to the coastal marine fishes of California 

 Calif Dep. Fish. Game, Fish Bull. 157, 235 p. 

 Moser, H. G., E, H. Ahlstrom, and E. M. Sandknop. 



1977. Guide to the identification of scorpionfish larvae 

 I family Scorpaenidae) in the eastern Pacific with com- 

 parative notes on species oiSebastes andHeltcolenus from 

 other oceans U..S. Dep. Commer., NOAA Tech. Rep 

 NMFS Circ, 402, 71 p, 



RUNYAN, S. 



1961. Early development of the clingfish, Gobiesox 

 strumosus Cope. Chesapeake Sci. 2:113-141. 



SPRING AND SUMMER FOODS OF WALLEYE 



POLLOCK, THERAGRA CHALCOGRAMMA, 



IN THE EASTERN BERING SEA 



The walleye (Alaska) pollock, Theragra chalco- 

 grainma (Pallas 1811 ), is the most abundant com- 

 mercial fish species in the eastern Bering Sea 

 (Pereyra et al.M and plays an important role in 

 ecosystem trophodynamics of the region. To obtain 

 better knowledge of the role of the pollock as a 

 predator, we have studied the stomach contents of 

 pollock from the eastern Bering Sea collected on 

 U.S. research vessels in the summer of 1974 and 

 on Soviet and Japanese fishing vessels in the 

 spring of 1977. 



Results from this study contribute to our under- 

 standing of feeding habits; information on sea- 

 sonal and size-dependent changes in feeding be- 

 havior are used to model interactions between 

 species (trophodynamics), and to predict the 

 influence of commercial fisheries on the abun- 

 dance of populations in the eastern Bering Sea 

 (Laevastu and Favorite-'*). 



Methods 



Pollock stomachs were collected by U.S. 

 fisheries observers, on an opportunistic basis, 

 aboard Soviet and Japanese motherships in the 

 eastern Bering Sea. Samples were collected in the 

 region of the continental shelf break in April and 

 May 1977 (Figure 1, Table 1). The stomachs were 

 removed, tied in cheesecloth, and preserved in di- 

 lute Formalin'' (ca. 5Vf ) and sent to the Northwest 

 and Alaska Fisheries Center, National Marine 

 Fisheries Service, NOAA, Seattle, Wash., for 

 analysis. Identifiable matter was separated by 

 major taxa. Wet weight for each taxa was deter- 

 mined after blotting with paper towels. Uniden- 



LARRY G. ALLEN 



Department of Biological Sciences 

 University of Southern California 

 Los Angeles. CA 90007 



'Pereyra, W. T., J. E Reeves, and R. G. Bakka- 

 la. 1976 Demersal fish and shellfish resources of the eastern 

 BeringSeain the baseline year 1975. Unpubl. manuscr, vol. 1, 

 619 p. Northwest and Alaska Fisheries Center, National Marine 

 Fisheries Service, NOAA, 2725 Montlake Blvd. E., Seattle, WA 

 98112. 



^Laevastu. T. and F. Favorite. 1976. Evaluation of .stand- 

 ing stocks of marine resources in the eastern Bering Sea. Un- 

 publ. manuscr.. .35 p. Northwest and Alaska Fisheries Center, 

 National Marine Fisheries Service, NOAA, 2725 Montlake Blvd. 

 E., Seattle. WA 98112. 



^Laevastu, T, and F Favorite. 1976. Dynamics of pollock 

 and herring biomasses in the eastern Bering Sea. Unpubl. 

 manuscr., 50 p. Northwest and Alaska Fisheries Center. Na- 

 tional Marine Fisheries Service, NOAA, 2725 Montlake Blvd. 

 E., Seattle, WA 98112. 



''Reference to trade names does not imply endorsement by the 

 National Marine Fisheries Service, NOAA. 



304 



FISHERY Bl'LLETIN VOL 77. NO I.Ii)79. 



