ABSTRACT CI ee ce te a) oe ero ee 
INTRODUCTION Seep ie etae, ee eT 
PART I. ALBATROSS STUDIES ama" tues. ’ 
A. Albatross Populations in the North Pacific. Ocean 
Census Methods ........e-. 
Results : 
B. 
D. 
SUMMARY 
CONTENTS 
Ecological and Life History Studies 
Age at which Albatrosses First Return to the 
Breeding Grounds . 
Age at which Albatrosses First Nest 
Selection of Nesting Sites by Immature 
Permanence of the Pair Bond 
Permanence of the Nesting Site . 
Frequency of Breeding ...... 
Sex Ratios SR Gek iat tet Le ar 
Population Dynamics ...... . 
Distribution at Sea ....... 
‘Breeding Cycle... . . . . 
Mortality of Juvenile Albatrosses 
Nest Mortality Due to Tidal Waves 
Albatross Problem in Agrcraft Operations 
Frequency of Albatross Strikes ‘ 
Damage Resulting from Albatross Strikes 
Location of Strikes in Relation to 
Wind Direction . 
Studies of Control Methods .... 
Large-scale Killing Program ... 
Terrain Modification Fs 
Conclusions and Recommendations 
SOOTY TERN STUDIES Oe eee 
Sooty Tern Populations ...... 
Sooty Terns and Aircraft Operations 
Studies of Control Methods ... 
Habitat Control Fy ae el 
Bombing oh ae oe 
Shooting and Hatasement. eta? winched aris 
Conclusions and Recommendations 
Albatrossés. 9 «60 a ate Ws ww hea 
Sooty Terns ele: tetera Meg hat 9% & le Bae ush ted 
REFERENC ES ° ° eo e e ° e s e * Le e ‘ e e 
ii 
Birds . 
Terrain 
