Schaefer who read all or parts of the manu- 

 script and made many helpful comments. 



My supervisor, Maurice Blackburn, gave 

 constant encouragement and guidance. 



LITERATURE CITED 



ALVERSON, FRANKLIN G. 



1960. Distribution of fishing effort and re- 

 sulting tuna catches from the eastern 

 tropical Pacific by quarters of the year, 

 1951-58. Inter-American Tropical Tuna 

 Commission Bulletin, vol. 4, no. 6, 

 p. 321-446. [English and Spanish.] 



BEKLEMISHEV, K. V., and V. A. BURKOV. 



1958. Sviaz' raspredeleniia planktonas 

 raspredeleniem vodnykh mass v zone 

 frontov severo-zapadnoi chasti Tikhogo 

 Okeana. (Relationship between plankton 

 and water masses in the frontal region 

 in the Northwest Pacific.) Akademii 

 Nauk SSSR, Trudy Instituta Okeanologii, 

 tom 27, p. 55-65. 



BLACKBURN, MAURICE, AND ASSOCIATES. 

 1962. Tuna oceanography in the eastern 

 tropical Pacific. U.S. Fish and Wildlife 

 Service, Special Scientific Report-- 

 Fisheries No. 400, 48 p. 

 BLACKBURN, MAURICE, RAYMOND C. GRIF- 

 FITHS, ROBERT W. HOLMES, AND WILLIAM 

 H. THOMAS. 



1962. Physical, chemical, and biological ob- 

 servations in the eastern tropical Pa- 

 cific Ocean: Three cruises to the Gulf 

 of Tehuantepec, 1958-59. U.S. Fish and 

 Wildlife Service, Special Scientific 

 Report-.Fisheries No. 420, 170 p. 

 BRANDHORST, WILHELM. 



1959. Nitrification and denitrification in the 

 eastern tropical north Pacific. Conseil 

 Permanent International pour I'Explor- 

 ation de la Mer. Journal du Conseil, 

 vol. 25, no. 1, p. 3-20. 



COMMERCIAL FISHERIES REVIEW. 



1959. North Atlantic fisheries exploration 

 and gear research: Good catches of tuna 

 taken on edge of Gulf Stream south-by- 

 east of Nantucket (M/V Delaware cruise 

 59-6). Vol. 21, no. 7, p. 40-41. 



CROMWELL, TOWNSEND. 



1958. Thermocline topography, horizontal 

 currents and "ridging" in the eastern 

 tropical Pacific. Inter-American Trop- 

 ical Tuna Commission Bulletin, vol. 3, 

 no. 3, p. 135-164. [English and Spanish.] 



CROMWELL, TOWNSEND, and EDWARD B. 

 BENNETT. 



1959. Surface drift charts for the eastern 

 tropical Pacific Ocean. Inter-American 

 Tropical Tuna Commission Bulletin, 

 vol. 3, no. 5, p. 217-237. [English and 

 Spanish.] 



CROMWELL, TOWNSEND, and JOSEPH L. 

 REID, Jr. 



1956. A study of oceanic fronts. Tellus, 

 vol. 8, p. 94-101. 



DEVOLD, FINN. 



1963. The life history of the Atlanto-Scan- 

 dian herring. Conseil Permanent In- 

 ternational pour 1' Exploration de la 

 Mer, Rapports et Proces- Verbaux, vol. 

 154, p. 98-108. 



EGGVIN, JENS. 



1940. The movements of a cold waterfront. 

 Report on Norwegian Fishery and Ma- 

 rine Investigations, vol. 6, no. 5, p. 

 82-151. 



GRIFFITHS, RAYMOND C. 



1960. A study of measures of population 

 density and of concentration of fishing 

 effort in the fishery for yellowfin tuna, 

 Neothunnus macropterus , in the eastern 

 tropical Pacific Ocean, from 1951 to 

 1956. Inter-American Tropical Tuna 

 Comnnission Bulletin, vol. 4, no. 3, 

 p. 41-136. [English and Spanish] 



GRIFFITHS, RAYMOND C. 



1963. Studies of oceanic fronts in the mouth 

 of the Gulf of California, an area of 

 tuna migrations. Food and Agriculture 

 Organization of the United Nations, 

 Fisheries Reports No. 6, vol. 3, p. 

 1583-1609. 



HELA, ILMO, AND TAIVO LAEVASTU. 



1962. Fisheries hydrography. Fishing News 

 (Books) Ltd., London, 137 p. 



JACOBS, WOODROW C. 



1951. The energy exchange between sea and 

 atmosphere and some of its conse- 

 quences. Bulletin of the Scripps Insti- 

 tution of Oceanography, vol. 6, no. 2, 

 University of California, La Jolla, 

 Calif., p. 27-122. 



KING, JOSEPH E., AND THOMAS S. HIDA. 



1957. Zooplankton abundance in the Central 

 Pacific, Part II. U.S. Fish and Wildlife 

 Service, Fishery Bulletin 118, vol. 57, 

 p. 365-395. 



KNAUSS, JOHN A. 



1957. An observation of an oceanic front. 

 Tellus, vol. 9, no. 2, p. 234-237. 

 LAEVASTU, TAIVO, AND HORACIO ROSA. 



1963. Distribution and relative abundance of 

 tunas in relation to their environment. 

 Food and Agriculture Organization of 

 the United Nations, Fisheries Reports 

 No. 6, vol. 3, p. 1835-1851. 



LA FOND, E. C. 



1961a. Oceanography and food. Naval Re- 

 search Reviews (November), Office of 

 Naval Research, Department of the Navy, 

 Washington, D.C., p. 9-13. 



196lb. Two-dimensional oceanography. Bu- 

 reau of Ships Journal, vol. 10, no. 12, 



51 



