No. Title 



13. The rational exploitation of the sea fisheries with particular refer- 

 ence to the fish stock of the North Sea. By Dr. G. P. Baerends. 

 Translated from the Dutch language by Jan Hahn; edited by Howard A. 

 Schuck. March 1950, iv + 102pp., 11 figs., 20 tables. 



14. The 1950 opening of the Bonnet Carre Spillway: its effect on oysters. 

 By Philip A. Butler and James B. Engle. March 1950, ii + 10 pp. , 



2 figs. , 7 tables. 



15. Studies on the Pacific pilchard or sardine (Sardinops caeruleaj, May 

 1950, ii + 200 pp., 49 figs., 37 tables, 3 plates. (This is a reissue 

 of Special Scientific Reports Nos. 19-24, issued in 1943.) 



16. Three papers on the stocks of tunas in Japanese waters: (1) On the 

 stock of Thunnus orientalis (Temminck & Schlegel); (2) on the stock of 

 the yellowfin tuna, Neothunnus macmpterus (Temminck & Schlegel); and 

 (3) on the stock of the albacore, Germo germo (Lacepede). By 

 Morisaburo Tauchi. Translated from the Japanese language by W. G. 

 Van Campen. April 1950, i + 15 pp. , 11 tables. 



17. Report of investigations of skipjack and tuna resources in 1947. By 

 Nakamura Research Staff. Translated from the Japanese language 

 by W. G. Van Campen. April 1950, i + 19 pp., 13 tables. 



18. Spawning grounds of tuna and skipjack. Translated from the Japa- 

 nese language by SCAP translators. Edited by B. M. Shimada and 

 W. G. Van Campen. April 1950, i + 14 pp. , 1 table. 



19. Larval and juvenile tunas and skipjacks. By Kamakichi Kishinouye. 

 Translated from the Japanese language by W. G. Van Campen. 

 April 1950, i + 14 pp. , 1 fig. 



20. The gonads of skipjack from Palao waters. By Kizo Matsui. Trans- 

 lated from the Japanese language by W. G. Van Campen. April 

 1950, i + 6 pp. , 2 figs. 



21. Age determination of fish (preliminary report 1). By Hiroaki Aikawa 

 and Masuo Kato. Translated from the Japanese language by W. G . 

 Van Campen. April 1950, i + 22 pp. , 8 figs. , 16 tables. 



22. Morphometry, growth, and age of tunas. Translated from the 

 Japanese language by SCAP translators and W. G. Van Campen. 

 Edited by B. M. Shimada and W. G. Van Campen. May 1950, 



i + 30 pp. , 8 figs. , 26 tables. 



23. The food habits of yellowtail tuna Neothunnus macmpterus (Schlegel) from 

 the Celebes Sea. By Hiroshi Nakamura. Translated from the 

 Japanese language by W. G. Van Campen. April 1950, i + 8 pp. , 



3 figs. 



