Spatial and temporal distributions of juveni8le tunas from stomachs of tunas caught by pole and line gear in the central and western pacific ocean

Contents: iii. preface, iv. abstract, vi. list of tables, vii. list of figures, 1. introduction, 1. methods, 1. data collection, 3. identification of tuna juveniles, 4. geographical sample grouping, 4. statistical analyses, 4. results and discussion, 4. the total data set, 7. size of predators examined for tuna juveniles, 7. size of tuna juveniles, 10. species composition of tuna juveniles, 10. size selective predation, 10. temporal and spatial variation in tuan juvenile abundance, 10. seasons, 10. time of day and distance from land, 19. geographical variation, 25. random versus clump0ed distribution of skipjack jeveniles, 26. size of skipjack juveniles, 29. tuna juvenile occurrence contrasted with occurrence of other diet items, 31. discussion of tuna juvenile occurrence, 34. summary and conclusions, 35. references, APPENDICES 41. sequence of surveys for cruses by the skipjack programme research vessels, 43. numbers of predators sampled for presence of tuna juveniles and numbers of tuna juveniles observed in predator stomachs for each country visit, 45. numbers of skipjack juveniles per 100 skipjack predator stomachs for each country visit, 46. stomach contents of all skipjack and yellowfin sampled by the skipjack programme from tropical waters between October 1977 and August 1980