著者

犬飼 哲夫 井上 聰

出版者

北海道大学農学部

雑誌

北海道大學農學部邦文紀要 (ISSN:03675726)

巻号頁・発行日

vol.2, no.4, pp.156-161, 1956-11-18

著者

犬飼 哲夫 芳賀 良一 森 樊須

出版者

北海道大學農學部

雑誌

北海道大学農学部邦文紀要 (ISSN:03675726)

巻号頁・発行日

vol.1, no.3, pp.301-304, 1953-03

著者

犬飼 哲夫 芳賀 良一

出版者

北海道大學農學部

雑誌

北海道大學農學部邦文紀要 (ISSN:03675726)

巻号頁・発行日

vol.1, no.4, pp.459-482, 1953-11-20

著者

犬飼 哲夫 森 楔須

出版者

日本応用動物昆虫学会

雑誌

應用動物學會・日本應用昆蟲學會合同大會講演要旨 : 日本農學會大會分科會

巻号頁・発行日

vol.28, 1953-04-02

著者

犬飼 哲夫 芳賀 良一

出版者

国立極地研究所

雑誌

南極資料 (ISSN:00857289)

巻号頁・発行日

vol.10, pp.697-720, 1960-03

著者

犬飼 哲夫

出版者

社団法人日本動物学会

雑誌

動物学雑誌 (ISSN:00445118)

巻号頁・発行日

vol.48, no.7, pp.335-336, 1936-07-15

著者

犬飼哲夫 上田明一著 林野庁指導部研究普及課編

出版者

日本林業技術協会

巻号頁・発行日

1950

著者

門崎允昭犬飼哲夫著

出版者

北海道新聞社

巻号頁・発行日

1993

著者

犬飼哲夫 門崎允昭著

出版者

北海道新聞社

巻号頁・発行日

1987

著者

門崎允昭 犬飼哲夫著

出版者

北海道新聞社

巻号頁・発行日

2000

著者

犬飼 哲夫 森 樊須 高安 知彦

出版者

北海道大学農学部

雑誌

北海道大学農学部邦文紀要 (ISSN:03675726)

巻号頁・発行日

vol.3, no.4, pp.18-25, 1960-10-25

著者

犬飼 哲夫

出版者

日本文化人類学会

雑誌

民族學研究 (ISSN:24240508)

巻号頁・発行日

vol.1, no.3, pp.482-491, 1935-07-01 (Released:2018-03-27)

著者

犬飼 哲夫

出版者

一般社団法人 電気学会

雑誌

電氣學會雜誌 (ISSN:00202878)

巻号頁・発行日

vol.97, no.9, pp.753-756, 1977-09-20 (Released:2008-04-17)

著者

犬飼 哲夫 芳賀 良一

出版者

北海道大學農學部

雑誌

北海道大学農学部邦文紀要 (ISSN:03675726)

巻号頁・発行日

vol.1, no.3, pp.281-300, 1953-03

被引用文献数

1

著者

犬飼 哲夫 門崎 允昭

出版者

日本応用動物昆虫学会

雑誌

日本応用動物昆虫学会誌 (ISSN:00214914)

巻号頁・発行日

vol.18, no.3, pp.139-144, 1974-09-25

被引用文献数

1 4

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The age of Ursus arctos yesoensis was known to be determined by teeth annuli, but the number and clarity of annuli sometimes differed from bear to bear or between the different kinds of teeth obtained from the same individual. In order to examine the characteristics of teeth annuli, 2 bears of known age (No.5 and 7) and 6 bears of unknown age were employed. The age of the bears of unknown was estimated by examining J_1 and P_4 teeth, which exhibited clear annuli. The teeth of J_1,J_2,J_3,C, P_1,P_4,M_1,M_2 and M_3 of the lower jaw obtained from No. 7 bear and some others were analyzed for detecting morphological and numerical differences of annuli. The age estimated from the annuli of C was sometimes younger than the actual age by one year due probably to the delayed development of the canine. The annuli numbers observed in the other kind of teeth coincided with one another (Fig. 9-17). There were 2 assertions that in the first one, the annuli formed in the period before the hibernation, and that in another, it begun to form in the fall and completed in April or May of the next year. In No. 1 (11 years and 8 months) bear which was killed at the end of September, J_1 showed 11 annuli in the inner part of the cementum, and the marginal cement layer was unstained. However, a little stained short line was found in it, indicating a new annulus formation (Fig. 1). P_4 of No. 2 (3y. & 9m.) bear which was killed in early October showed almost the same feature of new annulus formation as that of No.1 (Fig. 2). J-1 of No. 3 (14y. & 10m.) bear which was killed at the end of November had 15 annuli, of which the outmost one was stained faintly (Fig. 3). J_1 of No. 4 (2y. & 10m.) bear which was killed at the end of November showed about the same features as that of J_1 of No. 3 (Fig. 4). P_4 of No. 5 (5y. & 1m.) bear which was killed in the middle of Feburuary had 5 distinct annuli, and the outmost annulus was clear and perfect (Fig. 5). J_1 of No. 6 (11y. & 2m.) bear which was killed at the end of March had 11 clear annuli, and an unstained cementum layer was developing on the outer side of the outmost annulus (Fig. 6). P_ 4 of No. 7 (5y. & 3m.) bear which was killed in the middle of April showed 5 dark stained annuli, and an unstained cementum layer developed in some extent (Fig. 7). J_1 of No. 8 (10y. & 4m.) bear which was killed at the beginning of May showed 10 annuli with a well developed marginal unstained cementum layer (Fig. 8). It was clear that the formation of new annulus began in the middle of September and continued up to the end of April. The No. 5 bear was castrated male , so that it was suggested that the sex hormone had no relation to the annuli formation (Fig. 24). In this species the so-called accessory lines appeared, which closely resembled annuli and were also reported in grazzly bear. Therefore, in such a case, several kinds of teeth should be examined for an exact age determination. The mechanism of the accessory line formation and its significance are not known at present.

著者

犬飼 哲夫

出版者

社団法人日本動物学会

雑誌

動物学雑誌 (ISSN:00445118)

巻号頁・発行日

vol.88, no.4, pp.381-383, 1979-12-25

著者

犬飼 哲夫 芳賀 良一 Tetsuo INUKAI Ryoichi HAGA

雑誌

南極資料 (ISSN:00857289)

巻号頁・発行日

vol.10, pp.697-720, 1960-03

著者

犬飼 哲夫 芳賀 良一 Tetsuo INUKAI Ryoichi HAGA

雑誌

南極資料 (ISSN:00857289)

巻号頁・発行日

vol.4, pp.175-189, 1958-07

著者

犬飼 哲夫

出版者

札幌博物學會

雑誌

札幌博物学会会報

巻号頁・発行日

vol.17, no.3-4, pp.56-59, 1943-12-31

著者

犬飼哲夫著

出版者

[北海道帝國大学滿蒙研究會]

巻号頁・発行日

0000