Pelagic seabird surveys were made during 11 trans-pacific round navigations of car-transport ships between Japan and U. S. A., March 1983-February 1985. In a total of 124 recorded seabird species (5 Orders, 14 Families), the Procellariiformes included: Diomedeidae 2, Procellariidae 29 and Hydrobatidae 10 species. Their distribution showed the following patterns: 1. Boreal to temperate dispersal pattern 2. Temperate to subtropical dispersal pattern 3. Coastal patterns (Japanese and U. S. west coasts) 4. Subtropical endemic pattern 5. Subtropical to northward dispersal pattern. These distributional patterns reflected the specific adaptive levels to water temperature. The seasonal advance and retreat of migratory front could be traced in some trans-equatorial southern hemisphere species, and the main migratory lane was suggested in the Hawaiian leeward waters. In a few related species pairs, mutual shifts of main distributional sea areas were noticed.
Sexual morphological differences were examined based on functional aspects of skeletal and muscular characteristics in breeding Tufted Puffins, Lunda cirrhata collected near the Aleutian Islands in summer 1987. Males had larger sized bodies, bones, and heavier muscles than females. Total fresh weight of leg muscles ranged from 25.0g to 31.0g with an average of 28.1g in males and from 21.7g to 26.3g with an average of 24.1g in females. The gravimetric proportion of wing muscles to leg muscles was larger in females than in males. The averages of the two groups of muscles which were related to elevation and depression of the humerus were 76.9% and 193.9% in males, and 82.4% and 216.2% in females, respectively. It is therefore suggested that females have greater propulsive force for subaqueous and aerial movement, and less agility for subaqeous and terrestrial locomotion. Females would have a tendency to take food organisms with less mobility than males.
The present study reveals that in domestic pigeons the glandular epinephrine (E) storage is higher in the morning than in the evening. Formalin administration in pigeons depleted the adrenomedullary content of E with elevation of blood sugar in the morning only. The glandular norepinephrine (NE) remained unaffected after formalin stress both in the morning and in the evening.