532. Growth and survival of sockeye salmon introduced 

 into Ruth Lake after removal of resident fish pop- 

 ulations, by William R. Meehan. July 1966, iii + 

 18 p., 12 figs., 14 tables. 



533. Annual fish passage report— Rock Island Dam 

 Columbia River, Washington, 1965, by Paul D. Zim- 

 mer and John H. Broughton. October 1966, iii + 24 

 p., 3 figs., 21 tables. 



534. Distribution and abundance of sardine and 

 anchovy larvae in the California Current region off 

 California and Baja California, 1951-64: A sum- 

 mary, by Elbert H. Ahlstrom. August 1966, iii + 71 

 p., 6 figs., 66 tables. 



535. Red-tide research summarized to 1964 including an 

 annotated bibliography, by George A. Rounsefell 

 and Walter R. Nelson. December 1966, iii + 85 p., 

 8 figs., 4 tables, 1 app. table. 



536. Fur seal investigations, Pribilof Islands, Alaska, 



1965, by Alton Y. Roppel, Ancel M. Johnson, Ray- 

 mond E. Anas, and Douglas G. Chap- 

 man. October 1966, v + 45 p., 14 figs., 21 tables, 23 

 app. tables. 



537. Pelagic fur seal investigations, 1965, by Clifford H. 

 Fiscus and Hiroshi Kajimura. February 1967, iv + 

 42 p., 4 figs., 14 app. figs., 7 tables, 19 app. tables. 



538. Distribution of spawning pink salmon in Sashin 

 Creek, southeastern Alaska, and survival of their 

 progeny, by William J. McNeil. September 1966, 

 iii + 12 p., 1 fig., 13 tables. 



539. Tagging summary of American shad, Alosa 

 sapidissima (Wilson) and striped bass, Roccus sax- 

 atilis (Walbaum), Bureau of Commercial Fisheries 

 Biological Laboratory, Beaufort, N.C., 1950-65, by 

 Paul R. Nichols and Randall P. Cheek. July 1966, 

 8 p., 1 fig., 6 tables. 



540. Biological oceanography of the eastern tropical 

 Pacific: Summary of existing information, by 

 Maurice Blackburn. November 1966, iii + 18 p., 6 

 figs., 2 tables. 



541. Distribution and occurrence of Gymnodinium 

 breve on the west coast of Florida, 1964-65, by Alex- 

 ander Dragovich and John A. Kelly, Jr. December 



1966, iii + 15 p., 7 figs., 4 tables. 



542. Some effects of DDT on the ecology of salmon 

 streams in southeastern Alaska, by Roger J. 

 Reed. November 1966, iii + 15 p., 7 figs., 9 tables. 



543. Inventory of U.S. exploratory longline fishing ef- 

 fort and catch rates for tunas and swordfish in the 

 Northwestern Atlantic, 1957-65, by Peter C. Wilson 

 and Martin R. Bartlett. February 1967, v + 52 p., 

 81 figs., 13 tables. 



544. Abundance and distribution of zooplankton in 

 Hawaiian waters, 1955-56, by Eugene L. 

 Nakamura. May 1967, v -(- 37 p., 18 figs., 15 tables, 

 17 app. tables. 



545. Evaluation of a pump and reeled hose system for 

 studying the vertical distribution of small plank- 

 ton, by Roderick Leong, January 1967, iii + 9 p., 6 

 figs., 2 tables. 



546. Longline fishing for deep-swimming tunas in the 

 Marquesas Islands and adjacent areas, by Howard 

 O. Yoshida. April 1967, iii + 10 p., 10 figs., 3 

 tables. 



547. Response of migrating adult salmonids to vertical 

 and horizontal rectangular orifices at two depths, by 

 Clark S. Thompson, William Spencer Davis, and 

 Emil Slatick. June 1967, iii + 8 p., 7 figs., 5 tables. 



548. Expendable bathythermograph data on subsur- 

 face thermal structure in the eastern North Pacific 

 Ocean, by J. F. T. Saur and Dorothy D. 

 Stewart. August 1967, iii + 70 p., 9 figs., 13 tables, 

 50 charts. 



549. Atlas of July oceanographic conditions in the 

 Northeast Pacific Ocean, 1961-64, by R. W. 

 Owen, Jr. January 1967, vi + 85 p., 82 figs. 



550. Biology and management of the American shad 

 and status of the fisheries, Atlantic coast of the 

 United States, 1960, by Charles H. Walburg and 

 Paul R. Nichols. August 1967, iv + 105 p., 33 figs., 

 55 tables. 



551. Preliminary report on the feeding habits of tunas 

 in the Gulf of Guinea, by Paul N. Sund and Wil- 

 liam J. Richards. July 1967, iii + 6 p., 1 fig., 2 

 tables. 



552. The Trade Wind Zone Oceanography Pilot Study 

 Part I: Townsend Cromwell cruises 1, 2, and 3 Feb- 

 ruary to April 1964, by Robert L. Charnell, David W. 

 K. Au, and Gunter R. Seckel. June 1967, v -(- 75 

 p., 28 figs., 3 tables. 



553. The Trade Wind Zone Oceanography Pilot Study 

 Part IT: Townsend Cromwell cruises 4, 5, and 6 May 

 to July 1964, by Robert L. Charnell, David W. K. 

 Au, and Gunter R. Seckel. June 1967, v + 78 p., 28 

 figs., 3 tables. 



554. The Trade Wind Zone Oceanography Pilot Study 

 Part HI: Townsend Cromwell cruises 8, 9, and 10 

 September to November 1964, by Robert L. Char- 

 nell, David W. K. Au, and Gunter R. Seckel. June 

 1967, V + 78 p., 28 figs., 3 tables. 



555. The Trade Wind Zone Oceanography Pilot Study 

 Part IV: Townsend Cromwell cruises 11, 12, and 13 

 December 1964 to February 1965, by Robert L. Char- 

 nell, David W. K. Au, and Gunter R. Seckel. June 

 1967, V -I- 78 p., 28 figs., 3 tables. 



556. The Trade Wind Zone Oceanography Pilot Study 

 Part V: Townsend Cromwell cruises 14 and 15 

 March and April 1965, by Robert L. Charnell, David 

 W. K. Au, and Gunter R. Seckel. June 1967, v -t- 54 

 p., 19 figs., 2 tables. 



557. The Trade Wind Zone Oceanography Pilot Study 

 Part VI: Townsend Cromwell cruises 16, 17, and 21 

 May and June 1965 and January 1966, by Robert L. 

 Charnell, David W. K. Au, and Gunter R. 

 Seckel. June 1967, iv -t- 59 p., 20 figs., 3 tables. 



558. Geographical index to collecting stations of the ex- 

 ploratory fishing vessels Oregon, Silver Bay, Com- 

 bat, and Pelican 1950-65, by Frederick H. Berry and 

 Shelby Drummond. October 1967, iii -I- 25 p., 1 

 fig., 5 tables. 



74 



