MATURITY AND SPAWNING OF ALBACORE 



305 



Schaeper, M. B., and C. J. Orange. 



1956. Studies of the sexual development and spawn- 

 ing of yellowfin tuna (Neothunnus macrop- 

 terus) and skipjack (Katsuwonus pelamis) 

 in three areas of the eastern Pacific Ocean, by 

 examination of gonads. Inter-American 

 Tropical Tuna Coram. Bull. 1(6): 283-320. 



Shimada, B. M. 



1951. Japanese tuna- mot hership operations in the 

 western equatorial Pacific Ocean. U. S. 

 Fish and Wildlife Service, Com. Fish. Rev. 

 13(6): 1-26. 



SUDA, A. 



1954. Average year's fishing condition of tuna long- 



line fisheries. 1952 edition, albacore section. 

 Edited by Nankai Regional Fish. Res. Lab.; 

 published by Nippon Katsuo-Maguro Gyog- 

 yokumiai Rengokai, Tokyo. (English trans- 

 lation) U. S. Fish and Wildlife Service, Spec. 

 Sci. Rept.— Fish. No. 169, 131 p. 



1955. Albacore studies II. Size composition of the 



albacore taken in the North Pacific during 

 the period of northward movement. Bull. 

 Jap. Soc. Sci. Fish. 21(5): 314-319. (Trans- 

 lation) U. S. Fish and Wildlife Service, Spec. 

 Sci. Rept.— Fish. No. 182: 14-20. 



1956. Albacore of the Pacific and Indian Oceans. 



Tuna Fishing No. 34, the Investigative Soc. 

 of Tuna Fishery, Japan — Oct. 1956, p. 11- 

 15. (Translation from the Japanese by W.G 

 Van Campen in the files of Pacific Oceanic 

 Fishery Investigations Library.) 



Ueyanagi, S. 



1955. On the ripe ovary of the albacore, Germo 

 germo (Lacepfede), taken from the Indian 

 Ocean. Bull. Jap. Soc. Sci. Fish. 20(12): 

 1050-1053. (Translation from the Japanese 

 by W. G. Van Campen in the files of Pacific 

 Oceanic Fishery Investigations Library.) 



Van Campen, W. G. 



1952. Japanese mothership-type tuna-fishing opera- 

 tions in the western equatorial Pacific, June- 

 October 1951 (Report on the seventh, eighth, 

 and ninth expeditions). U. S. Fish and 

 Wildlife Service, Com. Fish. Rev. 14(11): 1-9. 



Yuen, H. S. H. 



1955. Maturity and fecundity of bigeye tuna in the 

 Pacific. U. S. Fish and Wildlife Service, 

 Spec. Sci. Rept.— Fish. No. 150, 30 p. 



Yuen, H. S. H., and F. C. June. 



1957. Yellowfin tuna spawning in the central equa- 



torial Pacific. II. S. Fish and Wildlife Serv- 

 ice, Fish. Bull. 57(112): 251-264. 



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