No. Title 



* 18. Fishery management. By William C. Herrington anu Robert A. 



Nesbit. (With an introduction by Ira N. Gabrielson. ) 1943, 

 i + 69 pp. , 3 figs. , 4 tables. 



* 19. Studies on the Pacific pilchard or sardine (Sardinops caerulea). I. - 



Structure of a research program to determine how fishing affects 

 the resource. By Oscar E. Sette. 1943, iv + 27 pp. , 3 figs. 



* 20. Studies on the Pacific pilchard or sardine (Sardinops caerulea). 2. - De- 



termination of the age of juveniles by scales ana otoliths. By 

 Lionel A. Walfora and Kenneth H. Mosher. 1943, iii + 19 pp. , 

 32 figs. , 8 tables. 



* 21. Studies on the Pacific pilchard or sardine (Sardinops caerulea). 3. - De- 



termination of age of adults by scales, and effect of environment on 

 first year's growth as it bears on age determination. By Lionel A. 

 Walford and Kenneth Mosher. 1943, iii + 29 pp. , 6 figs. , 9 tables. 



* 22. Studies on the Pacific pilchard or sardine (Sardinops caerulea). 6. - Ther- 



mal and diurnal changes in the vertical distribution of eggs and 

 larvae. By Ralph P. Silliman. 1943, iii + 17 pp. , 4 figs. , 11 

 tables. 



* 23. Studies on the Pacific pilchard or sardine (Sardinops caerulea). 4. - Influ- 



ence of temperature on the rate of development of pilchard eggs in 

 nature. By Elbert H. Ahlstrom. 1943, iii + 26 pp. , 2 figs. , 

 6 tables, 2 plates. 



* 24. Studies on the Pacific pilchard or sardine (Sardinops caerulea). 5. - A 



method of computing mortalities and replacements. By R^lph P. 

 Silliman. 1943, iii + 10 pp. , 2 figs. , 3 tables. 



* 25. Outlook for the Alaska herring fishery in 1944. By E. H. Dahlgren 



and L. N. Kolloen. 1944, 18 pp., 10 tables. 



* 26. Supplementary report on investigations of fish-salvage problems in 



relation to Shasta Dam. By Paul R. Needham, Harry A. Hanson, 

 and Lewis P. Parker. 1943, ii + 50 pp., 19 tables, 2 maps. 



* 27. The retention of adult salmon with particular reference to the Grand 



Coulee fish-salvage program. By Frederick F. Fish. 1944, 

 i + 29 pp. , 3 figs. , 5 tables. 



* 28. Harbor seals and sea lions in Alaska. By Ralph H. Imler and 



Hosea R. Sarber. 1947, 23 pp., 6 figs., 2 tables. 



* 29. The condition of the natural oyster reefs and other public oyster 



bottoms of Alabama in 1943 with suggestions for their improvement. 

 By James B. Engle. 1945, 42 pp. , 1 fig. , 14 tables. 



