August 1966 



COMMERCIAL FISHERIES REVIEW 



45 



Scientists are studying the watery environ- 

 ment of the fingerling before additional dams 

 go into operation in the Columbia and Snake 

 rivers. By comparing returns from each re- 

 lease site, biologists should be able to an- 

 swer such questions as: Can fingerlings ad- 

 just to the changing environment of the Co- 

 lumbia River? Can safe fingerling bypasses 

 be developed at "high mortality" areas in the 

 river? How do the large impoundments af- 

 fect the seaward -bound fish? 



The broad scientific study is under the 

 Fish-Passage Research Program of the 

 Bureau of Commercial Fisheries, Seattle, 

 with Howard L. Raymond, fishery research 

 biologist, in charge of the project. He is as- 

 sisted by other biologists from Washington 

 and from Astoria, Oreg. This is a joint pro- 

 ject with the states of Oregon, Washington, 

 and Idaho. The comprehensive fingerling 

 study will continue for several years. 



This branding technique has been devel- 

 oped for the most comprehensive and far- 

 reaching study of the fingerling salmon ever 

 undertaken in the Columbia River basin. In- 

 formation is lacking about the fingerlings' 

 downward journey to the sea. Much more is 

 known about the adult upstream migration to 

 their ancestral spawning grounds, so scien- 

 tists are researching to fill in the gap on 

 missing knowledge of the fingerlings. 



South Atlantic Ffsheries Explorations 

 and Gear Development 



MIGRATIONS AND SEASONAL 

 DISTRIBUTION OF PELAGIC FISH 

 IN FLORIDA STRAITS STUDIED: 



M/V '' Oregon" Cruise 109 (MayT6 -June 1 6 , 

 1966): A 32 -day cooperative study of pelagic 

 fish in the Florida Straits and along the Great 

 Bahama Bank was completed June 16, 1965, by 

 the exploratory fishing vesselOregon, oper- 

 ated by the Bureau of Commercial Fisheries, 

 U.S. Department of the Interior. Participants 

 in the study included the Bureau's Explora- 

 tory Fishing and Gear Research Base, Pasca- 

 goula. Miss.; Exploratory Fishing Station, St. 

 Simons Island, Ga.; the Bureau's Tropical At- 

 lantic Biological Laboratory at Miami; Woods 

 Hole Oceanographic Institution; Institute of 

 Marine Science, University of Miami; and the 

 International Game FishAssociation. Opera- 



tions aboard the Oregon were under the joint 

 control of the Bureau and Woods Hole Oceano- 

 graphic Institute (WHOI). 



Objectives of the .cruise were to: (1) study 

 the mechanics of bluefin tuna ( Thunnus thyn- 

 nus ) migrations along the Great Bahama Bank, 

 (2) gather information on the seasonal distri- 

 bution and composition of surface tuna schools, 

 and (3) continue observations on the distribu- 

 tion and density patterns of subsurface sword- 

 fish populations. Long lines were used for 

 sampling subsurface stocks and trolling lines 

 were used on surface schools. 



V 





LEGEND: 



\ 



• - LONG-UNE 

 o -HAM5UNE 

 ° - FLAT TRAWL 



V 



m\ Caps Kannady ^ 



30 



29 



.-■>• 



*■> 



• 



/. 









*.'••'. - 







• :' 



<s 



/ 



■• 



•27 



%' 









••> 



c- 





.•'. 





<^ 



"4 



^-1 





%i^ 



1|lJ1 



-n 



• 









• ■...,•... 







ih'-'^r"-- 





.' M 



ii 













-i. , 



• 







^» 



o 



/o, '• 





\ 





"'•r 





/•\ 





S 



J 



vi, 







v 





Grsot 



-V 





Bohomo 





-^i 





tofik 





\a 



s»"' 



^■f* 



; Cay Sal Bonk 



82 



81 



79 



23 



Area of operations during M/V Oregon Cruise 109 (May 16 -June 

 16, 1966). 



