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621. Predation by sculpins on fall chinook salmon, 

 Oncorhynclms tshawiitscba, fry of hatchery or- 

 igin. By Benjamin G. Patten. February 1971, 

 iii + 14 pp., 6 figs., 9 tables. 



622. Number and lengths, by season, of fishes caught 

 with an otter trawl near Woods Hole, Massa- 

 chusetts, September 1961 to December 1962. 

 By F. E. Lux and F. E. Nichy. February 1971, 

 iii + 15 pp., 3 figs., 19 tables. 



623. Apparent abundance, distribution, and migra- 

 tions of albacore, Thiinnus akilunga, on the North 

 Pacific longline grounds. By Brian J. Rothschild 

 and Marian Y. Y. Yong. September 1970, v + 

 37 pp., 19 figs., 5 tables. 



624. Influence of mechanical processing on the quality 

 and yield of bay scallop meats. Bv N. B. Webb 

 and F. B. Thomas. April 1971, ii'i + 11 pp., 9 

 figs., 3 tables. 



625. Distribution of salmon and related oceanographic 

 features in the North Pacific Ocean spring 1968. 

 By Robert R. French, Richard G. Bakkala, Ma- 

 sanao Osako, and Jun Ito. March 1971, iii + 

 22 pp., 19 figs., 3 tables. 



626. Commercial fishery and biology of the fi-esh- 

 water shrimp, Macrobrnchiiiin, in the Lower St. 

 Paul River, Liberia, 1952-53. By George C. Mil- 

 ler. February 1971, iii + 13 pp., 8 figs., 7 tables. 



627. Calico scallops of the Southeastern United States, 

 1959-69. Bv Robert Cummins, Jr. June 1971, 

 iii + 22 pp., 23 figs., 3 tables. 



628. Fur Seal Investigations, 1969. By NMFS, Ma- 

 rine Mammal Biological Laboratorv. August 

 1971, 82 pp., 20 figs., 44 tables, 23 appendi.x A 

 tables, 10 appendix B tables. 



629. Analysis of the operations of seven Hawaiian 

 skipjack tuna fishing vessels, June-August 1967. 

 By Richard N. Uchida and Ray F. Sumida. 

 March 1971, v + 25 pp., 14 figs., 21 tables. For 

 sale by the Superintendent of Documents, U.S. 

 Government Printing Office, Washington, D.C. 

 20402 - 35 cents. 



630. Blue crab meat. I. Pre.servation bv freezing. 

 July 1971, iii + 13 pp., 5 figs., 2 table.s.* 11. Effect 

 of chemical treatments on acceptability. By 

 Jurgen H. Strasser, Jean S. Lennon, and Fred- 

 erick J. King. July 1971, iii -|- 12 pp., 1 fig., 9 

 tables. 



631. Occurrence of thiaminase in some common aquat- 

 ic animals of the United States and Canada. By 

 R. A. Greig and R. H. Gnaedinger. July 1971, 

 iii -f 7 pp., 2 tables. 



632. An annotated bibliography of attempts to rear 

 the larvae of marine fishes in the laboratory. By 

 Robert C. May. August 1971, iii + 24 pp.^ 1 ap- 

 pendix I table, 1 appendix II table. For sale by 

 the Superintendent of Documents, U.S. Govern- 

 ment Printing Office, Washington, D.C. 20402 - 

 35 cents. 



633. Blueing of processed crab meat. II. Identification 

 of some factors involved in the blue discoloration 

 of canned crab meat Callincctes sapidiis. Bv 

 Melvin E. Waters. May 1971, iii + 7 pp., 1 fig!, 



3 tables. 



634. Age composition, weight, length, and sex of her- 

 ring, Clupcd pnllasii, used for reduction in Alas- 

 ka, 1929-66. By Gerald M. Reid. July 1971, 

 ni + 25 pp., 4 figs., 18 tables. 



635. A bibliography of the blackfin tuna, Thiinnus 

 nflaiiticus (Les.son). By Grant L. Beardsley and 

 David C. Simmons. .A.ugust 1971, 10 pp. For 

 sale by the Superintendent of Documents, U.S. 

 Government Printing Oflice, Washington, D.C. 

 20402 - 25 cents. 



636. Oil pollution on Wake Island from the tanker 

 R. C. Stoner. By Reginald M. Gooding. May 

 1971, iii + 12 pp., 8 figs., 2 tables. For sale by 

 the Superintendent of Documents, U.S. Govern- 

 ment Printing Office, Washington, D.C. 20402 - 

 Price 25 cents. 



637. Occurrence of larval, juvenile, and mature crabs 

 in the vicinity of Beaufort Inlet, North Carolina. 

 By Donnie L. Dudley and Mavo H. Judy. August 

 1971, iii + 10 pp., 1 fig., 5 tables. For sale by 

 the Superintendent of Documents, U.S. Govern- 

 ment Printing Oflice, Washington, D.C. 20402 - 

 Price 25 cents. 



638. Length-weight relations of haddock from com- 

 mercial landings in New England, 1931-55. By 

 Bradford E. Brown and Richard C. Hennemuth. 

 August 1971, V + 13 pp., 16 fig., 6 tables, 10 

 appendix A tables. For sale by the Superintend- 

 ent of Documents, U.S. Government Printing- 

 office, Washington, D.C. 20402 - Price 25 cents. 



639. A hydrographic survey of the Galveston Bay 

 system, Texas 1963-66. By E. J. Pullen, W. L. 

 Trent, and G. B. Adams. October 1971, v + 

 13 pp., 15 figs., 12 tables. For sale by the Super- 

 intendent of Documents, LT.S. Government Print- 

 ing Office, Washington, D.C. 20402 - Price 30 

 cents. 



640. Annotated bibliography on the fishing industry 

 and biology of the blue crab, Callinecfes sapidiis. 

 By Marlin E. Tagatz and .A.nn Bowman Hall. 

 August 1971, 94 pp. For sale by the Superinten- 

 dent of Documents, U.S. Government Printing 

 Office, Washington, D.C. 20402 - Price $1.00. 



641. Use of threadfin shad, Dorosoma pefevense, as 

 live bait during experimental pole-and-line fish- 

 ing for skipjack tuna, Katsuwomis peUimis, in 

 Hawaii. By Robei-t T. B. Iversen. August 1971, 

 iii + 10 pp., 3 figs., 7 tables. For sale by the 

 Superintendent of Documents, U.S. Government 

 Printing Office, Washington, D.C. 20402 - Price 

 25 cents. 



642. Atlantic menhaden Brevoortia tyrannus resource 

 and fishery — analysis of decline. By Kenneth 

 A. Henry. August 1971, v -f 32 pp.," 40 figs., 5 

 appendix figs., 3 tables, 2 appendix tables. For 

 sale by the Superintendent of Documents, U.S. 

 Government Printing Office, Washington, D.C. 

 20402 - Price 45 cents. 



646. Dissolved nitrogen concentrations in the Colum- 

 bia and Snake Rivers in 1970 and their efl'ect on 

 Chinook salmon and steelhead trout. By Wesley 

 J. Ebel. August 1971, iii -f 7 pj)., 2 figs., G 

 tables. For sale by the Superintendent of Doc- 

 uments, U.S. Government Printing Office, Wash- 

 ington, D.C. 20402 - Price 20 cents. 



