HAWAII (Cont. ) 



4. Biology of Akule or Big-Eye Scad. 



The principle objectives of this project are to find the reasons for the ap- 

 parent decline in the fishery for akule or big-eye scad and obtain information 

 for the formulation of effective management measures. Studies will include ex- 

 amination of catch statistics for changes in fishing effort and availability, samp- 

 ling of comnnercial catch for studies of reproduction, food and feeding habits, 

 raciation, growth rate, size and age composition and tagging of fish on fishing 

 grounds for information on various aspects of the biology and vital statistics of 

 this species. 



Hdqrs. Honolulu; began January 1954, continuing; $4,000; Yoshio Yamaguchi, 

 Leader. 



Address inquiries to: Vernon E. Brock, as in No. 1 above. 



5. Study of Biology of Tilapia mossambica. 



The immediate object is to determine the feasibility of using Tilapia 

 mossambica as a baitfish in the livebait tuna fishery. Determinations include 

 growth rate, time of spawning, fecundity, maturation, food and feeding habits 

 and reaction of Tilapia when chummed into a school of tuna. One essential 

 quality of good tuna livebait fish is surfacing and gathering about the fishing 

 vessel for protection when chummed into a school of tuna and in this regard, 

 nothing is kncwn about the species. Tilapia mossambica offers sonne possi- 

 bility as a pan fish and a forage fish for bass in lakes and reservoirs. Its 

 salinity tolerance ranges fronn fresh to sea water. 



Industrial Research Advisory Council cooperating; hdqrs. Honolulu; began 

 November 1953, to close October 1954; $3,500; Michio Takata, Leader, 



Address inquiries to: Vernon E. Brock, as in No. 1 above. 



6. Manual of Hawaiian Fishes. 



There is a need for a convenient yet accurate means of identifying Hawaiian 

 fishes by fishermen, workers in nnarine biology, and others interested in fishes. 

 In addition it is desirable to stabilize common nannes so that fisheries statistics 

 which are collected on the basis of common nannes, will be n^ore accurate and 

 reliable. 



University of Hawaii cooperating; hdqrs. Honolulu; began 1950, to close 1955; 

 $700; Vernon E. Brock and W. A. Gosline, Leaders. 



Address inquiries to: Vernon E. Brock, as in No. 1 above. 



7. Field Operation of Experimental Longline Fishing Gear. 



The research vessel, M. V. Makua, of the Division of Fish and Game, is 

 used in a joint project with P. O. F. I. in testing various experimental long 

 lines for tuna fishing. 



U. S. Fish and Wildlife Service cooperating; hdqrs. Honolulu; began March 

 1954, to close February 1955; $900; Georges Gilbert, Leader. 



Address inquiries to: Vernon E. Brock, as in No. 1 above. 



8. Freshwater Game Fish Management Research. (FA: F-4-R) 



This project is presently being conducted in three phases: (a) The life history 

 study of the goby; (b) experimental introduction of game fishes; and (c) the de- 

 velopment of a fish shipping method. As part of the goby study, efforts are being 

 nnade to trap, tag and mark fish for migration and growth studies; also underwater 

 observation of fish in streams to determine population densities and periodic 

 sampling in the field for studies of reproduction and other aspects of the life 

 history of the fish. Fish kept in laboratory tanks are used for experimental 

 tagging and marking experiments as well as observed for spawning habits. Fish 



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