Mammal Study最新文献_第8页

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":"46 1","pages":"1 - 11"},"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":"46 1","pages":"1 - 6"},"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":"46 1","pages":"237 - 250"},"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":"46 1","pages":"1 - 10"},"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

Genetic Analysis of a Newly Established Deer Population Expanding in the Sasebo Area in Nagasaki Prefecture, Japan Reveals No Evidence of Genetic Disturbance by Formosan Sika Deer 日本长崎县佐世保地区新建立的鹿种群的遗传分析没有发现台湾梅花鹿遗传干扰的证据

IF 1 4区生物学

Mammal Study Pub Date : 2021-06-17 DOI: 10.3106/ms2020-0084

J. Nagata, M. Yasuda, A. Yamashiro

{"title":"Genetic Analysis of a Newly Established Deer Population Expanding in the Sasebo Area in Nagasaki Prefecture, Japan Reveals No Evidence of Genetic Disturbance by Formosan Sika Deer","authors":"J. Nagata, M. Yasuda, A. Yamashiro","doi":"10.3106/ms2020-0084","DOIUrl":"https://doi.org/10.3106/ms2020-0084","url":null,"abstract":"Abstract. Native sika deer (Cervus nippon) had not been observed in and around Sasebo City, Nagasaki Prefecture, Kyushu, Japan. However, deer have recently been confirmed in this area, and the number of individuals and the range have been expanding, causing damage to forestry and natural vegetation. Although the origin of these deer is unknown, it may be derived from Formosan sika deer (C. n. taiouanus), which is listed as an invasive alien species in Japan. There is concern about hybridization between this subspecies and the native Japanese sika deer. In the present study, we used genetic methods to assess the current status of the deer in the Sasebo area of Nagasaki Prefecture, particularly its origin and hybridization. Our study showed that the deer did not originate from Formosan sika deer, and we found no evidence of hybridization. The deer in the Sasebo area were found to have a haplotype included in the southern Japanese sika deer lineage. The current study was unable to identify the specific origin of the deer due to limitations in PCR-RFLP and mitochondrial DNA sequencing analysis.","PeriodicalId":49891,"journal":{"name":"Mammal Study","volume":"46 1","pages":"251 - 263"},"PeriodicalIF":1.0,"publicationDate":"2021-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44961009","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

Selection of the Young Coconut Mesocarp by the Sulawesi Babirusa (Babyrousa celebensis) 苏拉威西岛Babirusa (Babyrousa celebensis)对幼椰子中果皮的选择

IF 1 4区生物学

Mammal Study Pub Date : 2021-06-02 DOI: 10.3106/ms2020-0059

Masaaki Ito, A. Macdonald, K. Leus, Yamato Hasegawa, İ. Balık, I. W. G. Bandem Arimbawa, I. D. G. Agung Atmaja

{"title":"Selection of the Young Coconut Mesocarp by the Sulawesi Babirusa (Babyrousa celebensis)","authors":"Masaaki Ito, A. Macdonald, K. Leus, Yamato Hasegawa, İ. Balık, I. W. G. Bandem Arimbawa, I. D. G. Agung Atmaja","doi":"10.3106/ms2020-0059","DOIUrl":"https://doi.org/10.3106/ms2020-0059","url":null,"abstract":"Abstract. The feeding behaviours of the Sulawesi babirusa (Babyrousa celebensis) in terms of its preference to eat the mesocarp, or husk, of immature coconuts (Cocos nucifera) and the feeding marks on leftover coconuts were observed. Additionally, to explore the physicochemical factors behind this preference, a comparative study was conducted on the basal and apical parts of the coconut mesocarp. The breaking load, macronutrient content, and volatile compounds were examined. The findings were as follows: 1) Babirusas always sniffed the cut surface of the coconut before eating. They then scooped out the basal part of the mesocarp where the fibres are more visibly scarce with their mandibular incisors and ate more than 7.6 times the surface area at this end than at the apical end. 2) The preferred basal part of the immature mesocarp had a lower breaking load. 3) The gas chromatography-mass spectrophotometry (GC-MS) chromatogram of the basal sample showed larger peak areas for 2-methylbutanal and 3-methylbutanal. In conclusion, the babirusa preferred the basal part of the immature coconut mesocarp, and the preferred basal part had distinctive features in terms of hardness and volatile profile, which is probably characterised by the presence of 2-methylbutanal and 3-methylbutanal.","PeriodicalId":49891,"journal":{"name":"Mammal Study","volume":"46 1","pages":"213 - 223"},"PeriodicalIF":1.0,"publicationDate":"2021-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43177342","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

Observation of Infanticide in the Particolored Flying Squirrel (Hylopetes alboniger) from a Forest in Northeastern Bangladesh 孟加拉东北部森林颗粒鼯鼠(Hylopetes alboniger)杀婴行为观察

IF 1 4区生物学

Mammal Study Pub Date : 2021-06-02 DOI: 10.3106/ms2020-0098

Sabit Hasan, Hassan Al-Razi, Tanvir Ahmed, Habibon Naher, S. Muzaffar

引用次数: 0

Spatial Genetic Structure of the Sika Deer (Cervus nippon) Population on Yakushima: Significant Genetic Differentiation on a Small Island 屋久岛梅花鹿种群的空间遗传结构:一个小岛上显著的遗传分化

IF 1 4区生物学

Mammal Study Pub Date : 2021-06-02 DOI: 10.3106/ms2020-0088

Chisato Terada, T. Yahara, Arika Kuroiwa, T. Saitoh

{"title":"Spatial Genetic Structure of the Sika Deer (Cervus nippon) Population on Yakushima: Significant Genetic Differentiation on a Small Island","authors":"Chisato Terada, T. Yahara, Arika Kuroiwa, T. Saitoh","doi":"10.3106/ms2020-0088","DOIUrl":"https://doi.org/10.3106/ms2020-0088","url":null,"abstract":"Abstract. The sika deer population on Yakushima Island exhibits high genetic diversity despite the small size of the island. We hypothesized that the high genetic diversity of the population had been maintained by the population structure, which included several subpopulations among which gene flow was limited. To test this hypothesis, we analyzed the spatial genetic structure of the population using 12 microsatellite loci. Two and four subpopulations were detected by STRUCTURE (stN and stS) and GENELAND (glN, glE, glS, and glW) software, respectively. The basic genetic structure assigned by STRUCTURE was supported by GENELAND, while stN and stS were further separated into two subpopulations (glN and glE; glS and glW, respectively) by GENELAND. All pairwise genetic differentiations between the two and four subpopulations were significant. These results demonstrated that the Yakushima population was structured into genetically distinct subpopulations. Although the location of the western boundary between stN and stS corresponded with a large river, no landscape or biological feature could be identified for the eastern boundary. We discussed the relationships between the genetic structure and management units designed by the local government and concluded that the Yakushima population should be managed based on their spatial population structures considering multiple time scales.","PeriodicalId":49891,"journal":{"name":"Mammal Study","volume":"46 1","pages":"225 - 235"},"PeriodicalIF":1.0,"publicationDate":"2021-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42159560","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

Mitochondrial DNA Haplotypes of Killer Whales around Hokkaido, Japan 日本北海道虎鲸线粒体DNA单倍型

IF 1 4区生物学

Mammal Study Pub Date : 2021-06-02 DOI: 10.3106/ms2020-0072

Y. Mitani, Yuki F. Kita, S. Saino, M. Yoshioka, Hiroshi Ohizumi, Fumio Nakahara

引用次数: 2

Characterization of Molecular Markers of Testicular Cells in Red Pandas (Ailurus fulgens styani) 红熊猫睾丸细胞分子标记的鉴定

IF 1 4区生物学

Mammal Study Pub Date : 2021-06-02 DOI: 10.3106/ms2020-0080

J. An, Ling He, R. Hou, Z. Cai, Dong-Hui Wang, Ke-Yu Shi, Songrui Liu, Chanjuan Yue, Yu-liang Liu

{"title":"Characterization of Molecular Markers of Testicular Cells in Red Pandas (Ailurus fulgens styani)","authors":"J. An, Ling He, R. Hou, Z. Cai, Dong-Hui Wang, Ke-Yu Shi, Songrui Liu, Chanjuan Yue, Yu-liang Liu","doi":"10.3106/ms2020-0080","DOIUrl":"https://doi.org/10.3106/ms2020-0080","url":null,"abstract":"Abstract. Self-sustained populations of captive red panda were challenged by low reproductive success rate. Defining the different types of testicular cell and increasing the knowledge of male fertility was critical for the improvement of reproductive efficiency in red panda captive populations. Here, we firstly report the histological structure in red panda testes at various ages. Besides, our data also showed that markers for red panda testicular cells including ITGA6, PLZF, THY1, VASA, DAZL, GATA4, VASA, and αSMA were expressed in adult testis tissue. To further examine the localizations of ITGA6, VASA, VIM, and αSMA, the immunohistochemical analysis was performed and the result showed the typical staining patterns of undifferentiated spermatogonia, multiple types of germ cells, Sertoli cells, and peritubular myoid cells (PMCs), respectively. For the testicular tissue digestion, two-step enzyme digestion was used to obtain the cell suspension. The red panda Sertoli cells, expressing Sertoli cell marker VIM, were cultured and conserved in this study, which can be used for red panda Sertoli cell establishment and as the feeder cells for red panda spermatogonial stem cells (SSCs) growing.","PeriodicalId":49891,"journal":{"name":"Mammal Study","volume":"46 1","pages":"197 - 204"},"PeriodicalIF":1.0,"publicationDate":"2021-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47562559","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