results of bait surveys and bait fishing opera- 

 tions during Gilbert cruise 43 are presented in 

 table 12. The length -frequency distributions of 

 bait samples are presented in table 14, and ob- 

 servations of surface water temperature and 

 salinity at baiting localities are presented in 

 table 4. 



As noted earlier, bait for pole-and-line 

 fishing from the Cape Falcon was obtained in 

 Almejas Bay, Baja California. The gear and 

 methods of baiting employed on the Cape Falcon 

 are similar to those used by California baitboat 

 fishermen. Adescription of the gear and meth- 

 ods is given by Alverson and Shimada (1957) and 

 will not be repeated here. The results of bait- 

 ing in Almejas Bay appear in table 13, which 

 also includes results of two days of baiting in 

 the bays of the Marquesas. 



Birds, tuna schools, and aquatic mannmals 



A watch was maintained during daylight 

 hours for birds, tuna schools, and aquatic mam - 

 mals aboard both the Cape Falcon and the Gilbert . 

 Summaries of these observations are presented 

 in tables 15 through 18, inclusive. 



Field party personnel 



Charles H. Gilbert 



William T. Tanaka, Master 

 Robert C. Wilson, Field Party Chief 

 Richard J. Hansen, Fishery Aid 

 Harry R. Jitts , Collaborator, 

 C.S.I.R.O. , Australia 



Cape Falcon 



LITERATURE CITED 



ALVERSON, F. G. and B. M. SHIMADA 



1957. A study of the eastern Pacific fishery 

 for tuna baitfishes, with particular 

 reference to the anchoveta ( Ceten - 

 graulis mysticetus ). inter- American 

 Tropical Tuna Commission, Bulletin 

 2(2):25-79. 



AUSTIN, T. S. 



1957. Summary, oceanographic andfishery 

 data, Marquesas Islands area, Aug- 

 ust - September 1956 (EQUAPAC). 

 U. S. Fish and Wildlife Service, Spe- 

 cial Scientific Report--Fisheries 217. 

 186 pp. 



GODSIL, H. C. 



1938. The high seas tuna fishery of Cali- 

 fornia. California Division of Fish 

 and Game, Fish Bulletin 51. 41 pp. 



JUNE, F. C. 



1951. Preliminary fisheries survey of the 

 Hawaiian - Line Islands area. Part 

 3 - The live -bait skipjack fishery in 

 the Hawaiian Islands. Connnnercial 

 Fisheries Review 13(2):1-18. 



U. S. NAVY HYDROGRAPHIC OFFICE 



1956. Bathythermograph observations . U. 

 S. Navy Hydrographic Office Publi - 

 cation 606-c, 2nd edition. 16 pp. 



U. S. WEATHER BUREAU 



1954. Manual of marine meteorological ob- 

 servations. U. S. Weather Bureau, 

 Circular M, 9th edition. 104 pp. 



Sverre Jangaard, Master 

 Thomas S. Hida, Observer 



LABORATORY PROCEDURES 



Salinity determinations 



A modification of the Knudsen method 

 (Van Landingham 1957) was used in analyzing 

 the surface water samples. 



VAN LANDINGHAM, J. W. 



1957. A modification of the Knudsen meth- 

 od for salinity determination. Jour- 

 nal du Conseil 22(2):174-179. 



WILSON, R. C. and M. O. RINKEL 



1957. Marquesas area oceanographic and 

 fishery data, January - March 1957. 

 U. S. Fish and Wildlife Service , Spe- 

 cial Scientific Report -- Fisheries 

 238. 136 pp. 



Personnel processing samples and data 

 (In addition to the author) 



Arthur Oishi, Fishery Aid 



Betty Ann L. Keala, Statistical Clerk 



WILSON, R. C, E. L. NAKAMURA, and 



H. O. YOSHIDA 



1958. Marquesas area fishery and environ- 

 mental data, October 1957 - June 

 1958. U. S. Fish and Wildlife Ser- 

 vice, Special Scientific Report -- 

 Fisheries 283. 105 pp. 



