Electroejaculation and Semen Characteristics of the Captive Hokkaido Brown Bear. (Ursus arctos yesoensis)

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概要

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• An electroejaculation technique was applied to the Hokkaido brown bear (Ursus arctos yesoensis) for semen collection and characterization of their seminal traits. Ten captive sexually mature bears were anesthetized and subjected to 21 electroejaculation trials during their mating season in 1995 and 1996. Spermic electroejaculates were recovered from 6 of the 10 bears (14 of 21 trials). The semen was characterized by serous fluid of semitransparent white color and a neutral pH. The mean values of ejaculate volume, sperm concentration, percentage of sperm motility, percentage of live spermatozoa, and percentage of pleiomorphic forms were 2.7 ml, 471.6 × 10 6 cells/ml, 80.2%, 89.7% and 21.8%, respectively. Although there was considerable variation among the seminal traits of the individual bears, the electroejaculation technique was effective in obtaining ejaculates from captive bears.

• 公益社団法人 日本獣医学会の論文

著者

• Ishikawa Akiko

  Department Of Community Health Tokai University School Of Medicine

• KANAGAWA Hiroshi

  Department of Theriogenology, Faculty of Veterinary Medicine, Hokkaido University

• SAKAMOTO Hideyuki

  Noboribetsu Bear Park

• Tsuruga Hifumi

  Department Of Theriogenology Faculty Of Veterinary Medicine Hokkaido University

• Kanagawa Hiroshi

  Department Of Biomedical Science Ontario Veterinary College University Of Guelph

• Takahashi Yoshiyuki

  Department Of Anesthesiology Dokkyo Medical University

• MATSUI Motozumi

  Department of Agricultural and Life Science, Obihiro University of Agriculture and Veterinary Medicine

• TSURUGA Hifumi

  Department of Veterinary Anatomy, Nippon Veterinary and Animal Science University

• MATSUI Motozumi

  Department of Theriogenology, Faculty of Veterinary Medicine, Hokkaido University

• Takahashi Yoshiyuki

  Department Of Anesthesia And Pain Medicine, Dokkyo Medical University School Of Medicine

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