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| Registros recuperados: 12 | |
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| 鹿野, たか嶺; 柳川, 久; 野呂, 美紗子; 原, 文宏; 神馬, 強志; YANAGAWA, Hisashi. |
| We studied the effectiveness of electronic deer whistles in scaring away sika deer that are likely to run onto roads, resulting in accidents. These whistles have been used in the U.S.A. and other countries. In this study, two types of deer whistles were tested: one that has a continuous tone with a fixed frequency (Whistle A) and the other that has an intermittent tone with a modulated frequency (Whistle B). To assess the effectiveness of the whistles in alerting deer, the deer's reactions to the whistles were observed by blowing the whistle from a fixed place that is visible to the deer when they appear by the roadside. For the control sample, deer's behavior when no whistle was blown was observed. When no whistle was blown, 51% of the deer were on alert... |
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Palavras-chave: Deer whistle; Hokkaido; Sika deer; Road-kill. |
| Ano: 2010 |
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/4167 |
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| OIKAWA, Eri; SHIMURA, Ryoji; NISHIMURA, Maki; FURUOKA, Hidefumi; 古岡, 秀文. |
| A 33 month-old male flying squirrel kept in a zoo developed progressive dyspnea and died. Macroscopically, the liver and lung were enlarged with numerous nodular vesicles. Histologically, these organs were replaced by numerous collapsed vesicles demarcated by fibrous tissues. The cysts lined by a cellular, germinal layer contained numerous brood capsules with abundant production of well-developed protoscolices. Protoscolices were about 80–100 μm in diameter, and had hooks being visible as refractive structures. This zoo locates in the east of Hokkaido where is an endemic area of Echinococcus multilocularis infection. From epidemiology and pathological findings, this animal was diagnosed as E.multilocularis infection. This report describes the pathology of... |
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Palavras-chave: Echinococcus multilocularis; Flying squirrel; Hokkaido; New host record; Pathology. |
| Ano: 2013 |
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/3944 |
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| IWASA, Mitsuhiro; MATSUSHIMA, Kana; INOUE, Ayako; 岩佐, 光啓. |
| Seasonal and spatial distributions of blowflies in relation to reproduction were investigated by baited traps in eight sites from lowland to high mountainous areas in Hokkaido, Japan. A total of 6,571 blowflies consisting of seven species in three genera was collected. The most predominant species was Calliphora vomitoria (Linnaeus) (5,946 flies, 90.5%), followed by C. nigribarbis Vollenhoven (537 flies, 8.2%). The remaining five species (Triceratopyga calliphoroides Rohdendorf, C. vicina Robineau-Desvoidy, C. loewi Enderlein, C. subalpina (Ringdahl), and Aldrichina grahami (Aldrich) were few in numbers. Calliphora vomitoria had the highest peak in autumn (October) in lowland to upland areas (70 m, 400 m, and 500 m), and it was also abundant from July to... |
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Palavras-chave: Blowflies; Distribution; Emergence; Hokkaido; Life history; Reproduction. |
| Ano: 2012 |
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/3843 |
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| 柳川, 久; 澁谷, 辰生; Yanagawa, Hisashi; Shibuya, Tatsuo. |
| 1.北海道十勝管内の２か所の小学校で，建物の周辺環境（植生や人工建造物），鳥類相と衝突死する鳥類の個体数の関係を調べるため，1994年６月から12月まで調査を行なった．調査を行なった新得町立屈足小学校と佐幌小学校はガラスを多用した同型の体育館を有していた． 2.ラインセンサスの結果，屈足小学校では25種498個体，佐幌小学校では25種516個体の鳥類が観察された．屈足小学校では，スズメが最も多く（178個体. 2000. 35.7％），次いでコムクドリ（58個体. 2000. 11.6％），アオジ（53個体. 2000. 10.6％），ハクセキレイ（50個体. 2000. 10.0％）が多かった．佐幌小学校ではスズメ（152個体. 2000. 29.5％）が最も多く，次いでシメ（78個体. 2000. 15.1％）が多かった． 3.佐幌小学校では10種26個体のガラス衝突した鳥類が拾得されたが，屈足小学校では１個体のみであった．衝突死が最も多い鳥類はシメで11個体（40.7％）であった．死亡した鳥類はほとんど（85.2％）が幼鳥であった． 4.佐幌小学校の周辺では，巣立ちしたシメの幼鳥の群れが採食するのがしばしば観察された．また，佐幌小学校にはスズメ類やムクドリ類のための巣箱も架設されており，ホオジロ類が好むやぶ地も備わっていた． 5.両校間の衝突死個体数の差は，特にシメなどの建物周辺で繁殖，採餌する鳥類の個体数の違いに起因すると思われた． |
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Palavras-chave: ガラス衝突; 死因; 鳥類群集; Bird; Hokkaido; Mortality; Population; Window-collisions. |
| Ano: 2000 |
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/2300 |
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| Registros recuperados: 12 | |
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