. California fish and game. Fisheries -- California; Game and game-birds -- California; Fishes -- California; Animal Population Groups; Pêches; Gibier; Poissons. TUNA LONGLINING 95 tioiis, the expedition found extremely poor fishing in waters immedi- ately around the Galapagos Islands, which is one of the most productive localities at present for surface tuna fishing. The catch ratios for all stations by kind of fish were as follows: Yellowfin tuna fish per 100 hooks Bigeye tuua Spearfishes (marlins and sailfish) Sharks Other Although the results of longline fishing may be
. California fish and game. Fisheries -- California; Game and game-birds -- California; Fishes -- California; Animal Population Groups; Pêches; Gibier; Poissons. TUNA LONGLINING 95 tioiis, the expedition found extremely poor fishing in waters immedi- ately around the Galapagos Islands, which is one of the most productive localities at present for surface tuna fishing. The catch ratios for all stations by kind of fish were as follows: Yellowfin tuna fish per 100 hooks Bigeye tuua Spearfishes (marlins and sailfish) Sharks Other Although the results of longline fishing may be used to interpret the probable distribution and apparent abundance of deep-dwelling tunas in the eastern tropical Pacific Ocean, it is difficult to assess the true significance of these data because of abnormal oceanic conditions which existed in the equatorial area at the time of the expedition. This anom- alous condition, known as "El Nino", is treated in detail under re- sults of oceanographic studies made by the expedition (Wooster and Jennings, 1955). Tuna Biology The bigeye and yellowfin tunas that were taken by the longlines were all uniformly large fish. Most of them measured over 1,400 mm. in total length and weighed over 200 pounds. The largest were the bigeye tuna and these weighed upwards of 300 pounds. Figure 3 shows the number of tunas caught and the size range of each species. For purposes of comparison, there is also included a length-frequency distribution of a a 20 18 10 -I B 14. YELLOWFIN TUNA LONGLINE JAN. - M AH. 1953 N • 5 I YELLOWFIN TUNA POLE AND LINE FEB., I 953 , N • I 00. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original California. Dept. of Fish and Game; California. Fish and Game Commission; California. Division of Fish and Game. [San Francisco, etc. ] State of Calif
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