Journal of the Yamashina Institute for Ornithology
Online ISSN : 1883-3659
Print ISSN : 0044-0183
Volume 6 , Issue 4
Showing 1-4 articles out of 4 articles from the selected issue
  • Nagahisa Kuroda
    1971 Volume 6 Issue 4 Pages 321-355
    Published: December 30, 1971
    Released: November 10, 2008
    JOURNALS FREE ACCESS
    The myological illustrations here presented are based on more than ten examples of Columba livia (Carrier Pigeons killed by cats), studied during 1945-46. The illustrations have been so devised as the origin and insertion of each muscle could be shown not hidden by other muscles, by restricting the number of muscles in one illustration. The originals were prepared with different colors by muscle belly, tendon and bone, but here they are reproduced by ordinal drawings.
    Appendicular (wing and leg) and caudal muscles only are illustrated (partly cited in author's previous works) and listed, according to Berger's (George & Berger, 1966) nomenclature, and the names used by the author in his previous works are added to the list when different from Berger's. Minute muscles, one in the wing (on radiale) and three of caudal region, are additions to Berger's list, though their further confirmation is necessary. Illustrations of muscles of Columba livia other than figured here are to be found in the literature given in this paper.
    Download PDF (2479K)
  • Satoshi YAMAGISHI
    1971 Volume 6 Issue 4 Pages 356-388
    Published: December 30, 1971
    Released: November 10, 2008
    JOURNALS FREE ACCESS
    1. This study was aimed to clarify the internal structure of home range in the Meadow Bunting Emberiza cioides inhabiting the cultivated fields of Odagiri near Nagano City. The investigation was made 1966 to 1968, most intensely in 1967.
    2. As many as Meadow Buntings found within a study area of 2.25ha (150m×150m) were color ringed. The population density was 2.7 birds per ha in 1966 and 1967, 2.2 in 1968, which were three times as high as their density in the river-side habitat.
    3. The 'time-mapping' method of Nakamura (1969) was adopted to measure home ranges, and it was confirmed that six 'one-hour mappings' obtained at any time of the day or season suffice to know the size, shape and center of the home range.
    4. The average size of the home range of E. cioides in Odagiri was 6.150m2 (0.615ha., δ=1, 689.9).
    5. The number of home range in the study area decreased yearly according to the change of the habitat. But same arrangement of the home ranges was maintained with high stability.
    6. The structure of home range was analysed with the distribution of activity loci of a male. In the early breeding season the male had a center of high activity density near the middle of the home range, but with the abvance of season, his activity was more centered closer to the nest and another sub-center was formed near the nest.
    7. This was supported by the actual observation of the movement of the male. In the beginning of breeding season he showed a tendency to be near the nest and went out to the periphery of the home range in a radial fashion, but this shape gradually changed.
    8. The distribution of the density of song activity loci almost coincided with that of the density of activity, but there were some spots where the song density was rather high. These are self-abvertisement posts against adjacent individuals, and this reflects the social character of the song activity.
    9. There were five kinds of territorial behaviors in E. cioides: singing, chasing, actual fighting, confronting and displacement activity.
    10. By analysing the spots where these territorial behaviors occurred within the home range, it was made clear that the home range of E. cioides under high population density had an encircling structure consisting of a center where the owner never let other individuals enter, and surrounding three zones, where it may win, resist, or defeated against others.
    11. The width of these zones was not uniform, being either narrow or wide, owing to the circumstance. It was narrow at the spots where the birds could easily memorize it and wide at the spots where there was no striking landmarks.
    12. The boarder of territory of E. cioides was settled with the balance of defensive intensity against the adjoining individuals.
    13. Territory in E. cioides well coincided with the song advertisement area.
    14. From these facts, E. cioides is a typical territorial bird.
    15. The finding that the home range in E. cioides would retain such a compact internal structure even under high population density, suggests that Emberiza group has at least two ecological lines, one a group that includes E. schoeniclus and E. yessoensis which could become semi-colonial and the other represented by strict territorial E. cioides and others.
    Download PDF (3305K)
  • Tatsuo Kazama
    1971 Volume 6 Issue 4 Pages 389-398
    Published: December 30, 1971
    Released: November 10, 2008
    JOURNALS FREE ACCESS
    The author first noticed in 1959 the shore washed sea birds on the beach of Kashiwazaki, Niigata prefecture and has reported, since 1964, Synthliboramphus antiquus, Uria lomvia, Brachyramphus marmoratus, Cerorhinca monocerata, Lunda cirrhata, Aethia psittaculus, Rissa tridactyla, Larus argentatus, Calonectris leucomelas, Gavia stellata and Gavia arctica, found dead by oil pollution. Alcids are especially affected by the pollution and the Ancient auklet, Synthliboramphus is the most usual species.
    In this report, 30 examples of this auklet were selected for anatomical analysis. On 24 January 1971 numerous dead ones contaminated black by oil were found along, 280km of the beach, 5 birds in 100m at a certain part. They could be grouped into 3 categories with respect to the body weight, amount of fat and oil attached. The most severely polluted example had oil weight 50% of the body weight with least fat. Others still had some fat. The oil was found even in the digestive tract.
    The ship oil is still being casted offshore in Japan Sea but is drifted ashore by prevailing winds. After much effort by the author and others, the problem became seriously considered but no definite solution is reached yet.
    Download PDF (3733K)
  • N. h. Kuroda
    1971 Volume 6 Issue 4 Pages Plate4
    Published: December 30, 1971
    Released: November 10, 2008
    JOURNALS FREE ACCESS
    Download PDF (925K)
feedback
Top