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You searched for: Journal name Mammal study Remove constraint Journal name: Mammal study Subject term Japan Remove constraint Subject term: Japan
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1. Abundance Estimates of Steller Sea Lions (Eumetopias jubatus) Off the Western Coast of Hokkaido, Japan

Author:
Kaoru Hattori; Toshihide Kitakado; Takeomi Isono; Orio Yamamura
Source:
Mammal study 2021 v.46 no.1 pp. 3-16
ISSN:
1348-6160
Subject:
Eumetopias jubatus; Japan; coasts; continental shelf; mammals; seasonal variation; spring; statistical analysis; Sea of Japan
Abstract:
... Aerial surveys were conducted to estimate the abundance of wintering populations of Steller sea lions (SSLs; Eumetopias jubatus) in the Sea of Japan originated from Russian waters using the line transect sampling method during spring from 2005 to 2019. The survey areas covered the continental shelf off the western coast of Hokkaido. A total of 28 196 km survey effort was made through the study per ...
DOI:
10.3106/ms2020-0030

2. Acoustic Detection of an Unknown Bat Species in Okinawa

Author:
Vladimir Dinets; Nicholas R. Friedman; Masashi Yoshimura; Masako Ogasawara; Evan P. Economo
Source:
Mammal study 2020 v.45 no.4 pp. 353-356
ISSN:
1348-6160
Subject:
Chiroptera; Ryukyu Archipelago; acoustics; echolocation; mammals; rare species; ultrasonics
Abstract:
... Pipistrelles of the genus Hypsugo are among the rarest bats in Japan, known from a handful of records. In June 2018, a sequence of echolocation calls apparently by a bat of this genus was recorded by an automatic ultrasound recorder on the island of Okinawa. The calls closely resemble H. pulveratus, a Chinese species never before recorded in Japan, and H. alaschanicus, a very rare species in Japan ...
DOI:
10.3106/ms2019-0077

3. Activity of Male Internal Genitalia and Breeding Season in the Lesser Japanese Mole, Mogera imaizumii, Inferred from Morphometric and Histological Analyses

Author:
Source:
Mammal study 2016 v.41 no.1 pp. 25-30
ISSN:
1343-4152
Subject:
breeding; breeding season; epididymis; genitalia; males; moles; morphometry; seminiferous tubules; spermatids; spermatocytes; spermatogonia; spring; summer; winter; Japan
Abstract:
... We researched seasonal reproductive activity in the lesser Japanese mole, Mogera imaizumii, by morphometrical and histological methods for male internal genitalia using samples from Kanagawa Pref., central Honshu, Japan. On the basis of the weights of testis and the epididymis, we determined that their weights become higher during February–April. On the other hand, the histological profiles of sem ...
DOI:
10.3106/041.041.0105

4. Alliance Formation of Indo-Pacific Bottlenose Dolphins (Tursiops aduncus) off Amakusa, Western Kyushu, Japan

Author:
Miki Nishita; Miki Shirakihara; Naoko Iwasa; Masao Amano
Source:
Mammal study 2017 v.42 no.3 pp. 125-130
ISSN:
1348-6160
Subject:
Tursiops aduncus; coasts; data collection; dolphins; females; males; philopatry; Japan
Abstract:
... Indo-Pacific bottlenose dolphins (Tursiops aduncus) off Amakusa-Shimoshima, approximately 200 individuals, form relatively large groups frequently exceeding 100 individuals and show high site fidelity to the area around Tsuji Island, northern coast of Amakusa-Shimoshima. This suggests that individual dolphins may have long interaction times with many other individuals. Consequently, competition be ...
DOI:
10.3106/041.042.0302

5. Aneuploid Chromosome Constitutions of the Small Japanese Field Mouse, Apodemus argenteus, in the Western Mountainous Area of Kanagawa Prefecture, Honshu, Japan

Author:
Hikari Myoshu; Masahiro A. Iwasa
Source:
Mammal study 2019 v.44 no.4 pp. 283-288
ISSN:
1348-6160
Subject:
Apodemus argenteus; B chromosomes; X chromosome; aneuploidy; females; fluorescence; karyotyping; mice; mountains; quinacrine; staining; Japan
Abstract:
... We studied an occurrence of chromosomal aneuploidy for ten individuals in the small Japanese field mouse, Apodemus argenteus, from the western mountainous area of Kanagawa Prefecture, Honshu, Japan. Eight of the individuals examined showed the standard 2n = 46 and FNa = 48 constitutions as the most frequent karyotype. However, of those eight individuals, seven carried an inter-cellular mosaicism w ...
DOI:
10.3106/ms2019-0002

6. Bark-feeding damage of sugi and hinoki cypress caused by sika deer, Cervus nippon: Does the sika deer prefer bark of hinoki cypress to sugi?

Author:
Akira Sano
Source:
Mammal study 2017 v.42 no.2 pp. 105-110
ISSN:
1348-6160
Subject:
Cervus nippon; Chamaecyparis obtusa; Cryptomeria japonica; bark; debarking; plantations; trees; Japan
Abstract:
... Occurrence of bark-feeding damage by sika deer (Cervus nippon) was examined at 26 mixed plantations comprised of both sugi (Cryptomeria japonica) and hinoki cypress (Chamaecyparis obtusa) in Mie Prefecture, central Japan. There was no significant difference in damage ratios with the tree species in plantations with only slight damage. In plantations with a damage ratio over 5% in either tree speci ...
DOI:
10.3106/041.042.0205

7. Bi-Directional Movement of Deer between Tomogashima Islands and the Western Part of the Kii Peninsula, Japan, with Special Reference to Hybridization between the Japanese Sika Deer (Cervus nippon centralis) and the Introduced Exotic Deer

Author:
Toshihito Takagi; Yuki Matsumoto; Ryosuke Koda; Hidetoshi B. Tamate
Source:
Mammal study 2020 v.45 no.2 pp. 133-141
ISSN:
1348-6160
Subject:
Cervus nippon; Japan; deer; ecosystems; genes; hybrids; introgression; microsatellite repeats; mitochondrial DNA; population structure; Taiwan
Abstract:
... Deer have been artificially introduced into many countries that are not within their native range. In some cases, they have disturbed the natural ecosystem in the invaded area. On Okinoshima Island in Wakayama Prefecture, Japan, exotic deer were introduced from Taiwan in 1955 and have since bred in the wild, raising concerns about their invasion into the habitats of, and hybridization with, the na ...
DOI:
10.3106/ms2019-0048

8. Can Video Traps Reliably Detect Animals? Implications for the Density Estimation of Animals without Individual Recognition

Author:
Gota Yajima; Yoshihiro Nakashima
Source:
Mammal study 2021 v.46 no.3 pp. 189-195
ISSN:
1348-6160
Subject:
Japan; animal density; cameras; dogs; probability
Abstract:
... Several statistical models have recently been developed to estimate animal density using camera trappings without individual animal recognition. However, most models assume that detection by camera traps of animals passing a specific area of the camera view is perfect. A recently developed REST model (Nakashima et al. 2018; Journal of Applied Ecology 55: 735–744) also depends on the trapping rates ...
DOI:
10.3106/ms2020-0055

9. Ciliate Protozoa from the Rumens of Japanese Serows (Capricornis crispus) Captured in the Northern Part of Shizuoka Prefecture, Japan

Author:
Yuki Kimura; Riyou Tsujino; Harumi Torii
Source:
Mammal study 2017 v.42 no.1 pp. 65-69
ISSN:
1348-6160
Subject:
Capricornis; Dasytricha ruminantium; Entodinium; Epidinium; Protozoa; fauna; rumen; ruminants; Japan
Abstract:
... Ciliate fauna collected from the rumens of eight wild Japanese serows (Capricornis crispus) captured in the northern part of Shizuoka Prefecture, Japan, were compared with the ciliate faunas found in other Japanese wild ruminants. We identified six species belonging to two genera of ciliates (Entodinium nanellum, Ent. minimum, Ent. simplex, Ent. dubardi, Ent. longinucleatum, and Elytroplastron bub ...
DOI:
10.3106/041.042.0101

10. A Comparative Study of the Fecal Characters of Japanese Serow (Capricornis crispus) and Sika Deer (Cervus nippon)

Author:
Yamashiro Asuka; Kamada Mahito; Yamashiro Tadashi
Source:
Mammal study 2013 v.38 no.2 pp. 117-122
ISSN:
1343-4152
Subject:
Capricornis; Cervus nippon; DNA; defecation; discriminant analysis; feces; pellets; species identification; surveys; ungulates; Japan
Abstract:
... The fecal pellets and fecal pellet group characters of two ungulates, the Japanese serow and sika deer, were compared in Tokushima, Japan, where the species occur sympatrically. Species identification based on 82 fecal DNA samples revealed that 28 and 54 fecal pellet groups were from Japanese serow and sika deer, respectively. The mean values of three fecal pellet groups characters, the maximum di ...
DOI:
10.3106/041.038.0207

11. Comparison of Age-at-Death Patterns in the Irruption and Post-Population-Crash Phases of an Introduced Sika Deer (Cervus nippon) Population

Author:
Kazutaka M. Takeshita; Mugino O. Kubo; Mayumi Ueno; Mari Ishizaki; Hiroshi Takahashi; Tsuyoshi Yoshida; Hiromasa Igota; Takashi Ikeda; Koichi Kaji
Source:
Mammal study 2021 v.46 no.1 pp. 77-84
ISSN:
1348-6160
Subject:
Cervus nippon; Japan; adverse effects; data collection; deer; fawns; probability; yearlings
Abstract:
... Age-specific changes in deer demographic parameters under food limitation are an important factor in predicting the post-population-crash dynamics of irruptive deer populations. To evaluate the differences in age-class-at-death between the initial irruption and post-population-crash phases of a sika deer (Cervus nippon) population, we analyzed a dataset of naturally dead carcasses from an introduc ...
DOI:
10.3106/ms2020-0009

12. Comparison of Visitors and Pollinators of Mucuna macrocarpa between Urban and Forest Environments

Author:
Shun Kobayashi; Tetsuo Denda; Chi-Cheng Liao; Yu-Hsiu Lin; Wei-Ting Liu; Masako Izawa
Source:
Mammal study 2018 v.43 no.4 pp. 219-228
ISSN:
1348-6160
Subject:
Callosciurus; Mucuna macrocarpa; Pteropus; biodiversity; cross pollination; flowers; forests; habitats; nectar robbing; pollinators; squirrels; urban areas; urbanization; Japan; Taiwan
Abstract:
... Mammal-plant interactions differ significantly between urban and natural environments; however, knowledge of mammal-pollinated plants in urban areas remains limited compared to plants in their natural habitats. Here, we compared the flower visitors of Mucuna macrocarpa between urban and forested areas in Okinawa-jima Island, Japan and in Taiwan. Mucuna macrocarpa requires a highly specialized poll ...
DOI:
10.3106/ms2018-0029

13. Comparison of the Food Habits of the Sika Deer (Cervus nippon), the Japanese Serow (Capricornis crispus), and the Wild Boar (Sus scrofa), Sympatric Herbivorous Mammals from Mt. Asama, Central Japan

Author:
Yoshitomo Endo; Hayato Takada; Seiki Takatsuki
Source:
Mammal study 2017 v.42 no.3 pp. 131-140
ISSN:
1348-6160
Subject:
Capricornis; Cervus nippon; Magnoliopsida; Sus scrofa; bamboos; boars; deer; dung beetles; eating habits; feces composition; graminoids; herbivores; leaves; particle size; summer; sympatry; wild boars; Japan
Abstract:
... Using fecal analyses, we examined the food habits of three large herbivorous mammals, the sika deer (Cervus nippon), the Japanese serow (Capricornis crispus), and the wild boar (Sus scrofa) on Mt. Asama, central Japan. Ten fecal samples were collected in all four seasons during 2012–2013, although boar feces were not available in summer because of high-level dung beetle activity. The proportions o ...
DOI:
10.3106/041.042.0303

14. Contrasting Effect of Artificial Grasslands on the Intensity of Deer Browsing and Debarking in Forests

Author:
Kanoko Takarabe; Hayato Iijima
Source:
Mammal study 2019 v.44 no.3 pp. 173-181
ISSN:
1348-6160
Subject:
Cervus nippon; browsing; debarking; deer; environmental factors; foraging; forests; herbivores; keystone species; landscapes; meadows; pastures; probability; trees; understory; Japan
Abstract:
... Deer can strongly affect other species as a keystone species. The intensity of their herbivory impact on forest vegetation is suggested to be affected by not only deer density but also by other environmental factors such as landscape components. Especially, artificial grasslands such as pastures and meadows possibility affect deer impact on forest vegetation by altering deer foraging behavior. The ...
DOI:
10.3106/ms2018-0082

15. Contribution of Acorn Masting to Food Composition and Body Condition of and Crop Damage by Wild Boars (Sus scrofa) Inhabiting Evergreen Forests in Japan

Author:
Akitaka Omori; Eiji Hosoi
Source:
Mammal study 2021 v.47 no.2 pp. 65-75
ISSN:
1348-6160
Subject:
Castanopsis cuspidata; Japan; Sus scrofa; acorns; bamboos; body condition; crop damage; food composition; mammals; masting; stomach; wild boars
Abstract:
... We analyzed the stomach contents of wild boars (Sus scrofa) inhabiting evergreen forests in western Japan and found that they were dependent on the masting of acorns of Castanopsis cuspidata. The increased availability of C. cuspidata acorns positively affected their consumption by wild boars. In the good mast years, wild boars consumed C. cuspidata acorns from November to June of the following ye ...
DOI:
10.3106/ms2021-0024

16. Dental Microwear Texture Analysis in Two Ruminants, Japanese Serow (Capricornis crispus) and Sika Deer (Cervus nippon), from Central Japan

Author:
Konoka Aiba; Shingo Miura; Mugino O. Kubo
Source:
Mammal study 2019 v.44 no.3 pp. 183-192
ISSN:
1348-6160
Subject:
Capricornis; Cervus nippon; browsing; deer; diet; foraging; graminoids; grazing; herbivores; interspecific variation; surface roughness; sympatry; texture; Japan
Abstract:
... Dental microwear texture analysis (DMTA) can be used to quantitatively evaluate tooth surface roughness and has been used to distinguish herbivorous ungulates according to interspecific dietary differences among grazers, browsers, and mixed feeders. Moreover, DMTA has been applied among local populations with intraspecific dietary variation. In general, the tooth surfaces of grazing species/popula ...
DOI:
10.3106/ms2018-0081

17. Diel Activity Patterns of Three Sympatric Medium-Sized Carnivores during Winter and Spring in a Heavy Snowfall Area in Northeastern Japan

Author:
Ryoga Watabe; Masayuki U. Saito
Source:
Mammal study 2021 v.46 no.1 pp. 69-75
ISSN:
1348-6160
Subject:
Japan; Procyon lotor; cameras; diel activity; forests; mammals; snow; spring; sympatry; winter
Abstract:
... In a heavy snowfall area in northeastern Japan, we clarified the diel activity patterns of and seasonal differences in three sympatric carnivores (red foxes, raccoon dogs, and Japanese martens) during winter and spring, and the interspecific differences among the activity patterns in each season. The activity time of the target species was obtained by camera-trap surveys at seven sites around the ...
DOI:
10.3106/ms2020-0039

18. Diet of Mass-Stranded Striped Dolphins (Stenella coeruleoalba) in Southern Japan (East China Sea)

Author:
Ayaka Matsuda; Tadasu K. Yamada; Yuko Tajima; Tatsuya Kunisue; Masao Amano; Takashi F. Matsuishi
Source:
Mammal study 2020 v.46 no.1 pp. 17-24
ISSN:
1348-6160
Subject:
Japan; Loliginidae; Ommastrephidae; Stenella coeruleoalba; chi-square distribution; diet; females; males; muscles; prey species; stomach; East China Sea
Abstract:
... Striped dolphins (Stenella coeruleoalba) mass-stranded on 26 April 2013 at Minamisatsuma, Kagoshima Prefecture, in southern Japan (East China Sea). The diet of the mass-stranded striped dolphins was investigated to reveal their foraging pattern through analyses of the stomach contents and stable isotopes in muscle. Of 26 stomachs sampled, 25 contained hard parts of prey animals; no fleshy remains ...
DOI:
10.3106/ms2020-0005

19. Dietary Overlap But Spatial Gap between Sympatric Japanese Serow (Capricornis crispus) and Sika Deer (Cervus nippon) on Eastern Shikoku, Japan

Author:
Asuka Yamashiro; Yoshinori Kaneshiro; Yoichi Kawaguchi; Tadashi Yamashiro
Source:
Mammal study 2019 v.44 no.4 pp. 261-267
ISSN:
1348-6160
Subject:
Capricornis; Cervus nippon; altitude; cameras; grasslands; habitats; sympatry; temperate zones; topographic slope; ungulates; Japan
Abstract:
... Spatial separation and dietary differences may allow the coexistence of similar sized ungulate species. Over the past two decades, populations of the sika deer (Cervus nippon) have increased markedly and overlapped with the habitats of the Japanese serow (Capricornis crispus). Recently, the Japanese serow population has declined and shifted its habitat from higher to lower altitudes in Shikoku, Ja ...
DOI:
10.3106/ms2018-0072

20. Effectiveness of Noninvasive DNA Analysis to Reveal Isolated-Forest Use by the Sable Martes zibellina on Eastern Hokkaido, Japan

Author:
Nagai Tomoko; Murakami Takahiro; Masuda Ryuichi
Source:
Mammal study 2014 v.39 no.2 pp. 99-104
ISSN:
1343-4152
Subject:
DNA; Martes; females; forests; genetic markers; home range; males; monitoring; urine; wintering grounds; Japan
Abstract:
... In order to assess importance of isolated forests as the wintering habitat of the sable (Martes zibellina) in eastern Hokkaido, Japan, we performed DNA analyses on 59 samples noninvasively collected in field (54 fecal, 3 urine and 2 hair samples). Consequently, 46 (41 fecal, 3 urine and 2 hair samples) of the 59 samples were recognized to have dropped from the sable. In addition, we successfully i ...
DOI:
10.3106/041.039.0205