ABSTRACT 



This report contains a summary of the results of visual observations of bird flocks and fish 

 schools in a portion of the central Pacific Ocean bounded by latitudes 20° S. and 30° N., and longi- 

 tudes 110° W. and 180°. Observations made by biologists and fishermen aboard vessels of the Bureau 

 of Commercial Fisheries Biological Laboratory in Honolulu from 1950 to 1961 are summarized in 

 a series of 12 charts. Each chart covers a 3-month period and shows the hours scouted and the 

 sightings per 10 hours of scouting for total bird flocks, total fish schools, and skipjack tuna schools 

 within areas measuring 5 degrees of latitude by 5 degrees of longitude. Seasonal and areal differ- 

 ences in rate of sighting are apparent, with the highest rates appearing in the vicinity of the 

 Marquesas Islands in the South Pacific Ocean. 



