Distribution of the Black-footed Albatross (Diomedea nigripes) in the north Pacific Ocean

The observations on the Black-footed Albatross during the two crossings in the Pacific Waters both in August 1959 and in March 1961 were reported. In general, the Albatross numbers in nonbreeding concentrations are almost evenly distributed throughout the North Pacifie Ocean. It seems however, that concentrations of this species on the eastern side of the Pacific Waters from the International Date Line is slightly heavier than the western side in these trips. Some factors which may influence upon concentrations of the Black-footed Albatross were investigated. However, no adequate correlation was found between Albatross numbers and sea water or air temperature, nor other meteorological data. Brief observation on the Laysan Albatross was described. The data suggest that further investigations on feeding habits and migration of the Albatross will be necessary to evaluate the factors which may influence upon their concetrations.