Mammal Study最新文献_第9页

The Hole Size that the Japanese Marten (Martes melampus) can Pass through 日本貂(Martes melampus)可以通过的洞大小

IF 1 4区生物学

Mammal Study Pub Date : 2021-09-16 DOI: 10.3106/ms2021-0010

Hironori Ueda, S. Doyama, Y. Eguchi

引用次数: 0

Are Northeastern Forests of Bangladesh Empty? Insights from Camera-Trapping into Spatiotemporal Activity Pattern of Mammals in a Semi-Evergreen National Park 孟加拉国东北部的森林是空的吗？从相机捕捉到半常绿国家公园哺乳动物的时空活动模式

IF 1 4区生物学

Mammal Study Pub Date : 2021-09-09 DOI: 10.3106/ms2020-0114

Tania Zakir, Harish Debbarma, Rafia Mahjabin, Rasel Debbarma, Zaber Khan, Md. Mizanur Rahman Minu, F. Zahura, M. Akash

{"title":"Are Northeastern Forests of Bangladesh Empty? Insights from Camera-Trapping into Spatiotemporal Activity Pattern of Mammals in a Semi-Evergreen National Park","authors":"Tania Zakir, Harish Debbarma, Rafia Mahjabin, Rasel Debbarma, Zaber Khan, Md. Mizanur Rahman Minu, F. Zahura, M. Akash","doi":"10.3106/ms2020-0114","DOIUrl":"https://doi.org/10.3106/ms2020-0114","url":null,"abstract":"Abstract. Bangladesh holds 191 km2 semi-evergreen northeastern (NE) forests where systematic camera-trapping has never been carried out. An effort of 587 trap nights in Satchari National Park, a NE forest, revealed ten carnivores, two ungulates, two primates, two rodents, and one treeshrew (12 threatened in Bangladesh; of which three globally threatened; dhole and northern treeshrew were new discoveries). Pairwise circadian homogeneity, coefficient of temporal overlap ( ), and spatial cooccurrence pattern were measured. High values ( > 0.75) were noted in 36 pairwise comparisons, and positive spatial association (Pgt < 0.05) in five. Anthropogenic activities overlapped with diurnal species (0.65 ≤ 1 ≤ 0.88) but stood dissimilar (P < 0.05 in the Mardia-Watson-Wheeler test) except for yellow-throated marten–livestock movement (1 = 0.70). Although species-specific dietary or temporal preference explains the observed associations, low detection of the jungle cat (2) compared to the leopard cat (56), absence of the fishing cat, homogenous activity (P > 0.05) in yellow-throated marten–crab-eating mongoose (1 = 0.83) and rhesus macaque–pig-tailed macaque (4 = 0.93) pairs need further research. These insights are remarkable as NE forests, the western cusp of the Indo-Burma biodiversity hotspot, are contrarily deemed ‘empty’, receiving least scientific investments.","PeriodicalId":49891,"journal":{"name":"Mammal Study","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2021-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47728738","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Morphological and Molecular Recharacterization of the Rodent Genus Mus from Nepal Based on Museum Specimens 基于博物馆标本的尼泊尔鼠类鼠属的形态和分子重新表征

IF 1 4区生物学

Mammal Study Pub Date : 2021-08-26 DOI: 10.3106/ms2020-0065

M. Kishimoto, Masaru Kato, Hitoshi Suzuki

引用次数: 1

New Humpback Whale Remains from the Holocene (Quaternary) of Osaka, Japan 日本大阪全新世(第四纪)的新座头鲸遗骸

IF 1 4区生物学

Mammal Study Pub Date : 2021-08-26 DOI: 10.3106/ms2021-0007

Yoshihiro Tanaka, H. Taruno

引用次数: 0

New Dental Anomalies in the Greater Japanese Shrew Mole Urotrichus talpoides (Eulipotyphla: Talpidae) 大日本Shrew Mole Urotrichus talpoides（真脂斑疹伤寒：Talpidae）牙齿新异常

IF 1 4区生物学

Mammal Study Pub Date : 2021-08-26 DOI: 10.3106/ms2020-0095

S. Okabe, A. Shinohara, M. Motokawa

{"title":"New Dental Anomalies in the Greater Japanese Shrew Mole Urotrichus talpoides (Eulipotyphla: Talpidae)","authors":"S. Okabe, A. Shinohara, M. Motokawa","doi":"10.3106/ms2020-0095","DOIUrl":"https://doi.org/10.3106/ms2020-0095","url":null,"abstract":"Abstract. Dental anomalies in the greater Japanese shrew mole Urotrichus talpoides Temminck, 1841 (Eulipotyphla: Talpidae) were examined, based on 1001 specimens. We followed the dental formula of U. talpoides I 2/1, C 1/1, P 4/3, M 3/3 = 36, which is adopted by the most recent Japanese researchers, and found dental anomalies in 17 specimens involving 12 instances of absent tooth, four of extra tooth, and one of connate tooth. Of these, the following dental anomalies are reported in U. talpoides for the first time: extra tooth posterior to the upper canine (C1), extra tooth posterior to the upper second premolar (P2), extra teeth on the inner sides of the upper fourth premolars (P4), and connate tooth on the lower canine (C1). The most frequently observed dental anomaly was the absent tooth on C1 (52.9%), whereas the others were not common (< 11.8%). Our results indicate that dental anomalies in U. talpoides in Urotrichini possess the different pattern from those in species in Scalopini and Talpini. On the other hand, alternative hypothesis of dental formula I 3/2, C 1/1, P 3/2, M 3/3 = 36 explains the observed anomaly pattern in line with the general trend of dental anomalies in Talpini and Scalopini.","PeriodicalId":49891,"journal":{"name":"Mammal Study","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2021-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42764482","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Factors Affecting Pre-Denning Activity in Asian Black Bears 影响亚洲黑熊冬眠前活动的因素

IF 1 4区生物学

Mammal Study Pub Date : 2021-08-26 DOI: 10.3106/ms2020-0101

S. Baek, T. Iwasaki, K. Yamazaki, T. Naganuma, A. Inagaki, K. Tochigi, M. L. Allen, Chinatsu Kozakai, S. Koike

引用次数: 1

Temporal Preference of Eurasian Lynx (Lynx lynx) in a Highland Forest in Northwestern Anatolia in Relation to Other Medium and Large Mammal Species 西北安纳托利亚高原森林中欧亚猞猁相对于其他大中型哺乳动物的时间偏好

IF 1 4区生物学

Mammal Study Pub Date : 2021-08-03 DOI: 10.3106/ms2020-0103

Burak Akbaba, Z. Ayas

{"title":"Temporal Preference of Eurasian Lynx (Lynx lynx) in a Highland Forest in Northwestern Anatolia in Relation to Other Medium and Large Mammal Species","authors":"Burak Akbaba, Z. Ayas","doi":"10.3106/ms2020-0103","DOIUrl":"https://doi.org/10.3106/ms2020-0103","url":null,"abstract":"Abstract. In this study, we aimed to determine the daily activity patterns and seasonal activity variations of the Eurasian lynx in different habitats (forests and open lands) in a geographical region where there are relatively few data on its ecological characteristics. Survey effort totaled 10 102 camera trap days, with 24 camera trap stations covering an area of approximately 650 km2. Our results showed no significant differences in the habitat preference of the lynx throughout the entire study area or between seasons. The crepuscular and nocturnal activity preferences of the lynx were similar to those of the wolf, red fox, and the European hare. The lynx's daily activity pattern peaked during 20:00–22:00 and 04:00–06:00 hours, and did not show significant variation between seasons. Kernel density estimation was used in order to reveal the temporal overlap of other carnivore and herbivore species with the lynx. The highest temporal overlap (coefficient of overlapping: 0.90) was seen with the European hare. Our findings also indicated higher temporal overlaps with the wolf, red fox, wild boar, and brown bear, and lower overlaps with the red deer, Southwest Asian badger, and Martes spp., which improved understanding of their interactions and co-existence with the lynx.","PeriodicalId":49891,"journal":{"name":"Mammal Study","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2021-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43160292","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

First Observation of Pregnancy and Parturition in a Captive Pantropical Spotted Dolphin (Stenella attenuata) 圈养泛热带斑点海豚妊娠和分娩的首次观察

IF 1 4区生物学

Mammal Study Pub Date : 2021-08-03 DOI: 10.3106/ms2020-0066

Shunya Ikeshima, Suguru Higa, Yuuta Mitani, Mariko Omata, Nozomi Kobayashi, K. Ueda, Isao Kawazu

{"title":"First Observation of Pregnancy and Parturition in a Captive Pantropical Spotted Dolphin (Stenella attenuata)","authors":"Shunya Ikeshima, Suguru Higa, Yuuta Mitani, Mariko Omata, Nozomi Kobayashi, K. Ueda, Isao Kawazu","doi":"10.3106/ms2020-0066","DOIUrl":"https://doi.org/10.3106/ms2020-0066","url":null,"abstract":"Abstract. A female pantropical spotted dolphin (Stenella attenuata) successfully mated with a mature male in captivity on April 13, 2017. This mating event was followed by an evaluation of the plasma progesterone concentration, appetite, and rectum temperature of the dolphin during pregnancy. We recorded the progesterone profiles during pregnancy, the gestation period, and the parturition events. The progesterone level (ng/mL) ranged between 0.7 and 133.4 (n = 27), and the average was 45.1 (SD = 38.5). Immediately after mating, extremely high progesterone levels were observed, which showed a decreasing trend towards the parturition day. The gestation period was 352 days. On the morning of the parturition day on March 31, the female displayed symptoms such as a drop in rectal temperature by approximately 1°C and reduced appetite. The time from the first observation of vaginal discharge to the fluke's appearance was 5.5 hr, while the subsequent period until birth was 4 hr in length. The time from parturition to the first successful nursing was approximately 4 hr, while the time from the nursing to the placental passage was less than 1 hr. To the best of our knowledge, this is the first report on the pregnancy period of pantropical spotted dolphins in captivity.","PeriodicalId":49891,"journal":{"name":"Mammal Study","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2021-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42840316","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Different Responses of Endemic and Alien Tree Squirrels to Tree Seed Chemicals 乡土松鼠和外来松鼠对树种化学物质的不同反应

IF 1 4区生物学

Mammal Study Pub Date : 2021-06-17 DOI: 10.3106/ms2020-0108

N. Tamura, Mutsumi Ito, F. Hayashi

{"title":"Different Responses of Endemic and Alien Tree Squirrels to Tree Seed Chemicals","authors":"N. Tamura, Mutsumi Ito, F. Hayashi","doi":"10.3106/ms2020-0108","DOIUrl":"https://doi.org/10.3106/ms2020-0108","url":null,"abstract":"Abstract. Quercus acorns and coniferous cones are the main food sources for tree squirrels, and the chemical contents of seeds, such as tannins and terpenes, are predicted to affect the squirrels' food preference. The tolerance of squirrels to chemical contents may vary between species that have evolved in different environments. The consumption of artificial food containing tannic acids or terpenes were compared between the endemic Sciurus lis and two alien species, S. vulgaris and Callosciurus erythraeus. Sciurus lis ate foods containing up to 4% tannic acid, whereas S. vulgaris and C. erythraeus ate foods containing 8% tannic acid. Sciurus lis and S. vulgaris could eat food containing a high concentration of terpenes (up to 0.3% α-pinene and 2% limonene), whereas the food consumption by C. erythraeus decreased drastically with increasing terpene concentrations. The two alien squirrels are highly resistant to tannins and thus the acorns of most Quercus species may be available for them. Sciurus lis exhibits a lower tolerance to tannins, but can consume foods with high concentrations of terpenes, suggesting a strong adaptation to coniferous forests, but not to Quercus forests. More attention must be paid to conserving suitable habitats for S. lis, an endemic relict species.","PeriodicalId":49891,"journal":{"name":"Mammal Study","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2021-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47586321","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Comparative Morphology of the Male Genitalia of Japanese Muroidea Species 日本Muroidea种雄性生殖器的比较形态

IF 1 4区生物学

Mammal Study Pub Date : 2021-06-17 DOI: 10.3106/ms2020-0096

Takashi O. Yato, M. Motokawa

{"title":"Comparative Morphology of the Male Genitalia of Japanese Muroidea Species","authors":"Takashi O. Yato, M. Motokawa","doi":"10.3106/ms2020-0096","DOIUrl":"https://doi.org/10.3106/ms2020-0096","url":null,"abstract":"Abstract. We examined the morphology of the male genitalia of six Muridae and five Cricetidae in the Muroidea focusing on the medial and lateral bacular mounds, as well as their ossification patterns to discuss the diversity and the movement mechanism of the trident structure. All examined species possessed a medial bacular mound and two lateral bacular mounds, which collectively formed a trident structure. In the Muridae species, the medial bacular mound was ossified or consisted of cartilage, while the lateral bacular mounds were composed of soft tissue. By contrast, both the medial and lateral bacular mounds were ossified in the Cricetidae species. Among the Muridae species, the medial bacular mound was well developed, and the lateral bacular mounds were small in Mus and Micromys species while the medial bacular mound was highly developed, and the lateral bacular mounds were developed in Apodemus speciosus. Different combinations of developmental characteristics of the medial and lateral bacular mounds produced variation in the glans penis morphology. Histological examination of A. speciosus and Craseomys rufocanus suggested that the movement of the lateral bacular mounds was driven by blood flowing into the cavernous space, and the movement increases the cross-sectional area of the glans penis.","PeriodicalId":49891,"journal":{"name":"Mammal Study","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2021-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46739997","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2