The Effects of Frequent Electroejaculation on the Semen Characteristics of a Captive Siberian Tiger (Panthera tigris altaica)

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概要

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• Artificial insemination (AI) can help to avoid inbreeding and genetic degeneration for sustaining genetically healthy populations of endangered species in captivity. Collection of a sufficient quantity of viable sperm is an essential first step in the AI process. In the present study, we examined the effects of frequent electroejaculation on semen characteristics in a Siberian tiger. We collected semen in all 17 trials during 6 breeding seasons (6 years). The mean number of sperm and the percentage of motile sperm were 294.3 ± 250.2 × 106/ejaculate and 82.4 ± 11.4%, respectively. The number of motile sperm tended to increase during frequent electroejaculation in the same breeding season. Semen collection by electroejaculation can be performed effectively up to the fourth sequential ejaculate, which contained the most sperm in the study. In conclusion, frequent collection of sperm by electroejaculation from tigers may be effective for collection of a large number of motile sperm.

著者

• NAGANO Masashi

  Laboratory of Theriogenology, Department of Veterinary Clinical Sciences, Graduate School of Veterin

• SAKAMOTO Hideyuki

  Noboribetsu Bear Park

• BANDO Gen

  Asahikawa Asahiyama Zoological Park and Wildlife Conservation Center

• Fukui Daisuke

  Asahikawa Asahiyama Zoological Park And Wildlife Conservation Center

• Takahashi Yoshiyuki

  Laboratory Of Theriogenology Department Of Veterinary Clinical Sciences Graduate School Of Veterinar

• KOSUGE Masao

  Asahiyama Zoological Garden

• NAKATA Shinichi

  Asahikawa Municipal Asahiyama Zoological Park & Wildlife Conservation Center, Asahikawa 078-8205, Japan

• YANAGAWA Yojiro

  Laboratory of Theriogenology, Department of Veterinary Clinical Sciences, Graduate School of Veterinary Medicine, Hokkaido University, Sapporo 060-0818, Japan

• SAKAMOTO Hideyuki

  Noboribetsu Bear Park, Noboribetsu 059-0551, Japan

• MATSUI Motozumi

  Division of Preventive Medicine, Department of Applied Veterinary Medicine, Obihiro University of Agriculture and Veterinary Medicine, Obihiro 080-8555, Japan

• NAKAMURA Ryohei

  Asahikawa Municipal Asahiyama Zoological Park & Wildlife Conservation Center, Asahikawa 078-8205, Japan

• KOSUGE Masao

  Asahikawa Municipal Asahiyama Zoological Park & Wildlife Conservation Center, Asahikawa 078-8205, Japan

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