UNITED STATES FISH AND WILDLIFE SERVICE 

 BUREAU OF COMMERCIAL FISHERIES 



SPECIAL SCIENTIFIC REPORT-FISHERIES 



Number 



543 WILSON, PETER C, and MARTIN R. BARTLETT, Inventory of U.S. exploratory longline 

 fishing effort and catch rates for tunas and swordfish in the northwestern Atlantic, 1957-65. 

 February 1967, v + 52 pp. 



544 NAKAMURA, EUGENE L. Abundance and distribution of zooplankton in Hawaiian waters, 

 1955-56. May 1967, vi + 37 pp. 



545 LEONG, RODERICK. Evaluation of a pump and reeled hose system for studying the vertical 

 distribution of small plankton. January 1967, iii + 9 pp. 



546 YOSHIDA, HOWARD O. Longline fishing for deep-swimming tunas in the Marquesas Islands 

 and adjacent areas. April 1967, iii + 10 pp. 



547 THOMPSON, CLARK S., WILLIAM SPENCER DAVIS, and EMIL SLATICK. Response of 

 migrating adult salmonids to vertical and horizontal rectangular orifices of two depths. 

 June 1967, iii + 8 pp. 



548 SAUR, J. F. T., and DOROTHY D. STEWART. Expendable bathythermograph data on subsur- 

 face thermal structure in the eastern North Pacific Ocean. August 1967, iii + 70 pp. 



549 OWEN, R. W., JR. Atlas of July oceanographic conditions in the Northeast Pacific Ocean, 

 1961-64. January 1967, vi+85 pp. 



550 WALBURG, CHARLES H., and PAUL R. NICHOLS. Biology and management of the American 

 shad and status of the fisheries, Atlantic coast of the United States, 1960. August 1967, 

 iv + 105 pp. 



551 SUND, PAUL N., and WILLIAM J. RICHARDS. Preliminary report on the feeding habits of 

 tunas in the Gulf of Guinea. July 1967, iii + 6 pp. 



552 CHARNELL, ROBERT L., DAVID W. K. AU, andGUNTER R. SECKEL. The trade wind zone 

 oceanography pilot study. Part I: Towns end C romwell cruises 1, 2, and 3. February to April 



1964. June 1967, v + 75 pp. 



553 CHARNELL, ROBERT L., DAVID W. K. AU, andGUNTER R. SECKEL. The trade wind zone 

 oceanography pilot study. Part II: Townse nd Cromwell cruises 4, 5, and 6. May to July 1964. 

 June 1967, v + 78 pp. 



554 CHARNELL, ROBERT L., DAVID W. K. AU, and GUNTER R. SECKEL. The trade wind zone 

 oceanography pilot study. Part III: Townsend Cromwell cruises 8, 9, and 10. September to 

 November 1964. June 1967, v + 78 pp. 



555 CHARNELL, ROBERT L., DAVID W. K. AU, andGUNTER R. SECKEL. The trade wind zone 

 oceanography pilot study. Part IV: Townse nd Cromwell cruises 11, 12, and 13. December 1964 

 to February 1965. June 1967, v + 78 pp. 



556 CHARNELL, ROBERT L., DAVID W. K. AU, andGUNTER R. SECKEL. The trade wind zone 

 oceanography pilot study. Part V: Townsend C romwell cruises 14 and 15. March and April 



1965. June 1967, iv + 54 pp. 



As long as available, copies may be obtained by laboratories, libraries, and individual scientists 

 without charge by writing to: Branch of Reports, Bureau of Commercial Fisheries, 1801 N. 

 Moore St., Arlington, Va. 22209. 



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