The tunas used in the study were caught and transported to 

 Coconut Island by Mr. Lester Zukeran, skip^ier of the University of 

 Hawaii research vessel Salpa. He was ably assisted by Mr. Stanley 

 Kitagawa and Mr. Royden Ikeda, students at the University. In the 

 ponds, the tunas were fed and otherwise cared for by Mr. Charles 

 Ncdiamoto, assistant to the Hawaii Marine Laboratory, who also took 

 water temperatures and samples of water for chlorinity determination. 



At times, Mr. Austin Pritchard and Miss Shirley Trefz, 

 graduate students in nnarine zoology, assisted in pond testing, 

 Mr. Carl Swanholnn, student in chemistry, assisted in preparing and 

 analyzing test materials. 



Samples of chemicals were provided gratis by E, I. 

 DuPont de Nemours and Company through Mr. Raoul Pantaleoni, by 

 Van Ameringen-Haebler, Inc. , through Dr. Ernst T. Theimer, by 

 P. R. Dreyer, Inc. , through Mr. George H. Zirkel, and by Sindar 

 Corporation through Mr, R, E. Horsey, 



Mr. Fritz Jermann of Hawaiian Tuna Packers, Ltd. , 

 spent r^any hours preparing materials for testing and assisted in 

 many other ways. Certain materials were also forwarded by Mr. Pete 

 Sunderland of B. C. Packers, Ltd. 



To all of these individuals, to the companies they repre- 

 sented, and to others who assisted in various ways we extend our 

 sincere thanks. We are also indebted to Mr. O. E. Sette, Director, 

 and other members of the stciff of the Pacific Oceanic Fishery Inves- 

 tigations, U, S. Fish and Wildlife Service, for advice, assistance, 

 and encouragement. 



FISHING 



As in the previous year (Tester 1952), tuna were caught 

 by trolling with the 46-foot Salpa, using two lines suspended fronn 

 each of two poles fastened to the mast amidships, and sometimes 

 using one or two additional lines fastened to the stern. The ship 

 operated three mornings a week off Kaneohe Bay during the period 

 June 6 to August 31, 1952. As shown in table 1, the catch consisted 

 oi 63 skipjack (Katsuwonus ijelamis), 66 kawakawa or little tunny 

 ( Euthynnus affinis ), 1/33 yellowfin ( Neothunnus nnacropterus ), 6 dol- 

 phin (Coryphaenus hippurus), and 2 wahoo ( Acanthocybium solandri ). 

 The catch ; er hour (all species) was low in June (1. 70) but higher in 



1/ Euthynnus yaito oi yrevious veuoi'ts (Tester 1952: van Weel 1952). 



2 



