Illustrations (Cont'd) 



Figure Page 



24 Length-frequencies of Albacore Caught by the Cobb in 1950 31 



25 Length-frequencies of Albacore Taken by the Cobb in 1950, 



Grouped by Areas and Dates of Fishing Operations « 32 



26 Small Rockfish, 3/4 t.o 3i Inches in Length, Were Predominant 



in the Stomach Contents of Albacore 34 



27 An Albacore Svri.iuiiing jn the Bait Tank of the Cobb ............. 35 



28 Oceanographic Equipment Used in 1950 Tuna Exploration 36 



29 Albacore Catches in Relation to Surface V/ater Temperatures .... 37 



30 Average Surface Water Temperatures and Albacore Catches by 



the Cobb off the Southern Oregon Coast .0 38 



31 Average Surface Water Temperatures and Albacore Catches by 



the Cobb off the Oregon Coast „ 39 



32 Average Surface Water Temperatures and Albacore Catches by 



the Cobb off the Oregon and Washington Coasts .« 40 



33 Average Surface Water Temperatures and Albacore Catches by 



the Cobb off the Washington Coast » 0.0. .oo 41 



34 Average Surface Water Temperatures and Albacore Catches by 



the Cobb off the Northern Queen Charlotte Islands and 



Southeast Alaska o . 42 



35 Average Surface Water Temperatures off the Washington and 



Oregon Coasts o 43 



36 Average Weekly Surface Water Temperatures Through the 



Summer of 1950 at Three United States Weather Stations 44 



37 Cobb Seamount in Relation to Some of the Other Major 



Seamounts in the Northeastern Pacific .„o 000 48 



38 Fathogram of Seamovint ..« 49 



39 Position of Long-line Sets Kade Adjacent to the 



22-Fathom Peak 50 



40 Make-up of Ground Long-line Gear Showing Main Parts (not 



drawn to scale) 51 



41 Large Red Snappers (Sebastodes ruberrimus ) , Averaging 15 



Pounds, Were Taken on the Seamount with Long-line Gear ,..,0 51 



42 Ground Long-line Gear Ready to be Set From the Stem 



of the Cobb 00 52 



Tables 



Page 



1. Troll Catch Data for Certain Areas Fished in 1950 24 



2. Number of Strikes and Fish Caught by 2-Hour Pei*iods 25 



3. Gill-net Catch Data— 1950 27 



4. Injuries to Gill-net Fish, August 19, 1950 o o.. 28 



5. Number of Albacore Taken in Each Size Mesh a 29 



6. Occurrence of Food Items in the Stomachs of Albacore in 1950 ,. 33 



7. Results of Long-line Sets Made on the Seamount 53 



> r 



