著者

Abe Hisashi

出版者

Mammalogical Society of Japan

雑誌

Mammal study (ISSN:13434152)

巻号頁・発行日

vol.34, no.1, pp.37-40, 2009-03-01

著者

Mizuho Hirasawa Eiji Kanda Seiki Takatsuki

出版者

THE MAMMAL SOCIETY OF JAPAN

雑誌

Mammal Study (ISSN:13434152)

巻号頁・発行日

vol.31, no.1, pp.9-14, 2006 (Released:2006-07-08)

参考文献数

19

被引用文献数

44

---

Food habits of the raccoon dog (Nyctereutes orocyonoides) at a western suburb of Tokyo were analyzed by the point-frame method by use of 344 fecal samples for a year. The food habits were omnivorous, but plants, particularly plant leaves and seeds, were predominant. The seasonal foods were characterized by leaves and flowers in spring, insects in summer, seeds in autumn, and birds/mammals and artificial foods in winter. Dependency on artificial foods was not strong. The raccoon dogs fed on various fruits and nuts, among which those of planted fruit trees like ginkgo and persimmon were particularly important. The raccoon dog seems to have adapted themselves to "satoyama", a traditional Japanese landscape.

著者

Makoto Ohkubo Kouji Tokutake Haruka Ito Katsutoshi Yoshida Akio Shimizu

出版者

THE MAMMAL SOCIETY OF JAPAN

雑誌

Mammal Study (ISSN:13434152)

巻号頁・発行日

vol.33, no.2, pp.83-86, 2008 (Released:2009-07-04)

参考文献数

10

被引用文献数

2

著者

Chan-Ryul Park Woo-Shin Lee

出版者

THE MAMMAL SOCIETY OF JAPAN

雑誌

Mammal Study (ISSN:13434152)

巻号頁・発行日

vol.28, no.1, pp.17-21, 2003 (Released:2003-07-04)

参考文献数

29

被引用文献数

20

---

We developed a habitat suitability model for wild boar Sus scrofa in the Mt. Baekwoonsan region of Korea. We recorded wild boar field signs (dust baths, bedding sites, digging areas, feces and tracks) and habitat variables such as the nearest distance to watercourses (DWATER) and trails (DTRAIL), slope, aspect (ASPECT), forest type and forest age. Field signs and habitat characteristics were assessed within a 25 × 25 m quadrat along seven survey routes from August 1999 to July 2000. We conducted a CATMOD regression analysis based on 416 field signs at 50 points and classified them into 3 levels of habitat importance (high, medium and low) based on the relative importance of field signs. Habitat suitability indices (P) were calculated based on significant relationships between parameters such as DWATER, DTRAIL and ASPECT resulting in the following function: P = 1/(1 + exp – (3.82 × (DWATER) – 1.21 × (DTRAIL) + 1.35 × (ASPECT))). Important habitats of wild boar were distributed near watercourses and far from trails along east and south-facing slopes.

著者

Akio Shinohara Shin-ichiro Kawada Masashi Harada Kazuhiro Koyasu Sen-ichi Oda Hitoshi Suzuki

出版者

日本哺乳類学会

雑誌

Mammal Study (ISSN:13434152)

巻号頁・発行日

vol.33, no.2, pp.77-82, 2008 (Released:2009-07-04)

参考文献数

39

被引用文献数

9

著者

Sasaki Motoki Endo Hideki Yamamoto Masako ARISHIMA Kazuyoshi HAYASHI Yoshihiro

出版者

日本哺乳類学会

雑誌

Mammal study = The Continuation of the Journal of the Mammalogical Society of Japan (ISSN:13434152)

巻号頁・発行日

vol.25, no.1, pp.27-34, 2000-06-01

被引用文献数

3 7

---

The musculature and functional anatomy of the head and skull of a tiger <i>Panthera tigris</i> were, examined and compared with those of various other felid species. The <i>Musculus masseter</i> is divided into three layers. The superficial layer of which is well-developed and further sub-divided into lateral and medial components. The ventro-caudal fleshy portion of the lateral component originates behind the last upper molar, where it is attached by a strong tendon to the tubercle <i>tuber maxillae</i>. The medial component, which runs dorso-ventrally, has a particularly well-developed fleshy portion. The present anatomical study suggests that in the tiger, large masseteric forces are produced in both ventro-rostral and ventro-dorsal directions. In the tiger, a process is present on the tubercle of the maxilla from which the strong tendon originates. This process is also apparent in the leopard <i>Panthera pardus</i>, the jaguar <i>P. onca</i> and the puma <i>Felis concolor</i>. It is not found, however, in either the domestic cat <i>F. catus</i> or the Iriomote wild cat <i>F. iriomotensis</i>. Comparisons between the skulls of various species of felidae indicate that whereas the puma, the leopard and the jaguar each possess the strong tendon, which bundles the ventro-caudal fleshy portion of the lateral component, the domestic cat and the Iriomote wild cat only possess weak tendons attaching to this component.

著者

Hideki Endo Kimiyuki Tsuchiya

出版者

日本哺乳類学会

雑誌

Mammal Study (ISSN:13434152)

巻号頁・発行日

vol.31, no.1, pp.47-57, 2006 (Released:2006-07-08)

参考文献数

25

被引用文献数

12

---

A new species of Ryukyu spiny rat, Tokudaia tokunoshimensis was described in the specimens originating from Tokunoshima Island in the southernmost region of Japan. The populations of Tokudaia are separately distributed only in Amami-Oshima, Tokunoshima, and Okinawa-jima Islands. We have described the osteological and external morphological characteristics and clarified the osteometrical distinctions among the three populations using the skull and skin collections. All external dimensions of head and body length, tail length, hindfoot length and ear length were larger in the Tokunoshima population than in the other two in mean value. The raw osteometrical data separated the Tokunoshima Island population from the other two in all measurements except for the length of molar row in the Okinawa-jima Island population. The principal component analysis also demonstrated that the skulls from the Tokunoshima Island population were morphologically distinct from those of the other populations. Here, from these findings, we point out that the Tokunoshima population of Tokudaia should be regarded as an independent species from the two other populations.

著者

Kawada Shin-ichiro Koyasu Kazuhiro Zholnerovskaya Elena I. ODA Sen-ichi

出版者

日本哺乳類学会

雑誌

Mammal study (ISSN:13434152)

巻号頁・発行日

vol.27, no.2, pp.107-111, 2002-12-01

被引用文献数

2 2

---

The upper dental formula of the Russian desman Desmana moschata (Linnaeus, 1758) (Insectivora, Talpidae) is considered based on the position of the premaxillary suture (sutura incisiva). From the lateral aspect, this suture extends to the second tooth in the tooth row. From the ventral aspect, the suture connects the common alveolus fossa of the second and third teeth in front of the second tooth on the labial edge and behind it on the lingual edge; consequently, the third tooth in the upper row appears to be derived from the maxilla. Therefore, the upper tooth formula of D. moschata may differ from the traditional fundamental dental formula of eutherian mammals (I3, C1, P4, M3), and consist of two incisors, one canine, five premolars, and three molars (I2, C1, P5, M3). This hypothetical view, however, assumes two changes, a tooth deletion in the incisor row and an addition in the premolar row. The significance of the premaxillary suture and possible pitfalls in using it to define dental formulae are discussed.

著者

Kawada Shin-ichiro Harada Masashi Koyasu Kazuhiro ODA Sen-ichi

出版者

日本哺乳類学会

雑誌

Mammal study (ISSN:13434152)

巻号頁・発行日

vol.27, no.1, pp.91-94, 2002-06-01

被引用文献数

7 7

著者

Shinohara Akio Kawada Shin-ichiro Harada Masashi KOYASU Kazuhiro ODA Sen-ichi SUZUKI Hitoshi

出版者

日本哺乳類学会

雑誌

Mammal study (ISSN:13434152)

巻号頁・発行日

vol.33, no.2, pp.77-82, 2008-06-01

被引用文献数

9

著者

Moribe Junji Yokohata Yasushi

出版者

Mammalogical Society of Japan

雑誌

Mammal study (ISSN:13434152)

巻号頁・発行日

vol.36, no.3, pp.135-139, 2011-09-01

著者

Kaneko Yukibumi

出版者

日本哺乳類学会

雑誌

Mammal study (ISSN:13434152)

巻号頁・発行日

vol.27, no.1, pp.31-63, 2002-06-01

被引用文献数

3 8

---

I classified about 600 museum specimens of Père David's vole and examined its distribution. In a restricted area of Burma (25.70-26.13°N, 98.13-98.70°E; Myanmar, Area V), 150 individual specimens sampled during the same period could be classified into two groups on the basis of the relationship between the hind foot length (HFL) and tail length (TL): the large (L) and small (S) types. Group L was distributed at altitudes above 2460 m, whereas Group S was found below 2460 m. The distance between the incisor and third upper molar (I-M3) exceeded 14.3 mm in Group L, and was less than 15.2 mm in Group S. Except for young individuals, specimens from Groups L and S from Area V differed in two external and 14 cranial measurements. The molar pattern of the third upper molar ranged from simple to complex types, and varied both within and between Groups L (Types B, C, and D) and S (Types B and C), indicating that it is inadequate as a primary diagnostic character. The relationship between TL and HFL differentiated the groups in Areas III, IV (Yunnan Province, China), VI (India, Thailand, Vietnam, and northern Burma), and VII (the provinces of Zhejiang and Fujian in China, and Taiwan), but did not differentiate them in Areas I (the provinces of Hubei and Guizhou) or II (the provinces of Gansu and Sichuan), where histograms of I-M3 distinguished Groups L and S. Proportional likeness was represented using a ratio diagram; the lines for 11 cranial dimensions distinguished Group L from Group S, indicating that they are two distinct species. Group L was identified as Eothenomys mucronatus (Allen, 1912); it was distributed in Areas II, III, V, and VI. Group S was identified as E. melanogaster (Milne-Edwards, 1872); it was distributed in Areas I, II, IV, V, and VII. The elevations at which E. melanogaster occurred decreased from southwest to northeast, whereas no clear altitudinal tendency was seen in E. mucronatus.

著者

Kaneko Yukibumi

出版者

Mammalogical Society of Japan

雑誌

Mammal study (ISSN:13434152)

巻号頁・発行日

vol.35, no.1, pp.31-55, 2010-03-01

被引用文献数

2

著者

Kaneko Yukibumi

出版者

Mammalogical Society of Japan

雑誌

Mammal study (ISSN:13434152)

巻号頁・発行日

vol.36, no.1, pp.11-22, 2011-03-01

被引用文献数

1

著者

Kaneko Yukibumi Smeenk Chris

出版者

日本哺乳類学会

雑誌

Mammal study = The Continuation of the Journal of the Mammalogical Society of Japan (ISSN:13434152)

巻号頁・発行日

vol.21, no.2, pp.161-164, 1996-12-01

被引用文献数

1

著者

Kaneko Yukibumi

出版者

日本哺乳類学会

雑誌

Mammal study = The Continuation of the Journal of the Mammalogical Society of Japan (ISSN:13434152)

巻号頁・発行日

vol.26, no.1, pp.17-33, 2001-06-01

被引用文献数

3 5

---

Thirty-eight museum specimens of the Ryukyu spiny rat, belonging to the genus <i>Tokudaia</i> Kuroda, 1943 (Rodentia, Muridae), from the islands of Amami Oshima and Okinawa, in the Ryukyu Islands (=the Nansei Islands), southern Japan, were examined and measured. Each specimen was classified into one of five age groups (I-V) determined by the wear of the three upper molars. The spiny rat of Okinawa has on average within age groups III and IV a statistically longer and wider skull and a longer molar row than that of Amami Oshima. However, neither the posterior nor the central parts of the skull length and width differ between the two islands. Against the same size of head and body length (H&BL) or incisor - the third upper molar length (I-M3), the spiny rat of Okinawa has longer I-M3 or narrower zygomatic arches than the spiny rat of Amami Oshima. The Okinawan spiny rat has a wider first upper molar (wM1≥1.9 mm), whereas that of Amami Oshima is wM1≤1.8 mm. The Okinawan spiny rat has the palatine foramen of the skull situated more posteriorly than that of Amami Oshima. These findings indicate conclusively that the spiny rat populations on the two islands of Amami Oshima and Okinawa have distinctly different morphological characteristics, in addition to having different karyotypes, and as such they should be regarded as distinct species. The spiny rat of Amami Oshima should be named as <i>Tokudaia osimensis</i> (Abe, 1933) while that of Okinawa should be known as <i>Tokudaia muenninki</i> (Johnson, 1946).

著者

Nakanishi Nozomi Okamura Maki Watanabe Shinichi IZAWA Masako DOI Teruo

出版者

日本哺乳類学会

雑誌

Mammal study = The Continuation of the Journal of the Mammalogical Society of Japan (ISSN:13434152)

巻号頁・発行日

vol.30, no.1, pp.1-10, 2005-06-01

被引用文献数

2 10

---

The seasonal variation in home range size of one male and one female Iriomote Cat <i>Prionailurus bengalensis iriomotensis</i> was studied by radio-tracking and automatic photography on Iriomote Island, Japan. The study was conducted in the Shirahama area located in the western part of the island. Shirahama provides a small area of suitable lowland habitat (<50 m a.s.l.) for the Iriomote Cat. Two individuals, one male and one female, were confirmed to be resident in this area. The periodical home range size of the male was 1.24 ± 0.41 km² and that of the female was 1.30 ± 0.54 km² throughout the year, with no significant difference between them. We compared the results of these observations with those from another area of suitable habitat in Funaura and discussed what factors may affect male home range size. The home range of the male cat in Shirahama was found to be only half the size of that of males in Funaura, though it showed similar seasonal fluctuation. The home ranges of females were similar in the two areas. Our results provide empirical confirmation of the influence of the number and distribution of females on male home range size in a solitary felid.<br>

著者

Okamura Maki Doi Teruo Sakaguchi Noriaki IZAWA Masako

出版者

日本哺乳類学会

雑誌

Mammal study = The Continuation of the Journal of the Mammalogical Society of Japan (ISSN:13434152)

巻号頁・発行日

vol.25, no.2, pp.75-85, 2000-12-01

被引用文献数

5 6

---

The Iriomote cat, <i>Felis iriomotensis</i>, is a small felid endemic to Iriomote Island, Okinawa, Japan. Little is known of its breeding ecology in either captivity or the wild. In this study we investigated the reproductive cycle from observations of the frequency of male urine marking, reproductive conditions and behaviors of females with young in the field, and with reference to previous reports related to breeding. Breeding of female Iriomote cats may not be seasonally restricted, although a mating peak was recognized between February and April. Females delivered litters between April and June, and maternal care continued until kittens reached four to 4.5 months of age.

著者

Endo Akira Doi Teruo

出版者

日本哺乳類学会

雑誌

Mammal study = The Continuation of the Journal of the Mammalogical Society of Japan (ISSN:13434152)

巻号頁・発行日

vol.26, no.1, pp.69-72, 2001-06-01

被引用文献数

2

著者

Suzuki Hitoshi Iwasa Masahiro A. Ishii Nobuo NAGAOKA Hiroko TSUCHIYA Kimiyuki

出版者

日本哺乳類学会

雑誌

Mammal study = The Continuation of the Journal of the Mammalogical Society of Japan (ISSN:13434152)

巻号頁・発行日

vol.24, no.1, pp.43-50, 1999-06-01

被引用文献数

6 11

---

We examined the geographic variation of <i>Tokudaia osimensis</i> through the analysis of mitochondria1 cytochrome <i>b</i> (cyt <i>b</i>) gene sequences and the restriction fragment length polymorphism (RFLP) in the nuclear ribosomal RNA gene (rDNA), using samples collected from Tokuno-shima and Amami-oshima in the Ryukyu Islands. The two populations show intrinsic karyological variation (Tokuno-shima, 2n=45; Amami-oshima, 2n=25). Sequences of the cyt <i>b</i> gene differed considerably between the two island populations. The extent of the sequence divergence among 1,140 bp of the gene was calculated to be 0.088 using the Kimura two parameter method, and was comparable to those between related species of rodents such as within genus <i>Mus</i> or <i>Rattus</i>. The extent of the differentiation in the rDNA-RFLP was also high. Three out of 22 restriction site variants were found to be fixed in the nuclear rDNA arrays of hundreds of copies in either one of the two island populations. These intensive inter-populational differences indicate that the two island populations may have been isolated for a considerable period of evolutionary time, probably several millions of years, despite there having been several opportunities for renewed genetic contact during the Pleistocene ice ages. Our data strongly suggest that the current taxonomic status of the populations of the two islands, Amami-oshima and Tokuno-shima, which regards them conspecific, should be reviewed.