Methods of evaluating the spermatogenic ability of male raccoons (Procyon lotor)

DOI Web Site Web Site PubMed 被引用文献2件 参考文献26件
  • UNO Taiki
    Laboratory of Wildlife Medicine, Nippon Veterinary and Life Science University, Tokyo 180-8602, Japan
  • KATO Takuya
    Laboratory of Wildlife Medicine, Nippon Veterinary and Life Science University, Tokyo 180-8602, Japan
  • SEKI Yoshikazu
    Laboratory of Wildlife Medicine, Nippon Veterinary and Life Science University, Tokyo 180-8602, Japan
  • KAWAKAMI Eiichi
    Laboratory of Veterinary Reproduction, Nippon Veterinary and Life Science University, Tokyo 180-8602, Japan
  • HAYAMA Shin-ichi
    Laboratory of Wildlife Medicine, Nippon Veterinary and Life Science University, Tokyo 180-8602, Japan

書誌事項

タイトル別名
  • Methods of evaluating the spermatogenic ability of male raccoons (<i>Procyon lotor</i>)

この論文をさがす

抄録

Feral raccoons (Procyon lotor) have been growing in number in Japan, and they are becoming a problematic invasive species. Consequently, they are commonly captured and killed in pest control programs. For effective population control of feral raccoons, it is necessary to understand their reproductive physiology and ecology. Although the reproductive traits of female raccoons are well known, those of the males are not well understood because specialized knowledge and facilities are required to study them. In this study, we first used a simple evaluation method to assess spermatogenesis and presence of spermatozoa in the tail of the epididymis of feral male raccoons by histologically examining the testis and epididymis. We then evaluated the possibility of using 7 variables—body weight, body length, body mass index, testicular weight, epididymal weight, testicular size and gonadosomatic index (GSI)—to estimate spermatogenesis and presence of spermatozoa in the tail of the epididymis. GSI and body weight were chosen as criteria for spermatogenesis, and GSI was chosen as the criterion for presence of spermatozoa in the tail of the epididymis. Because GSI is calculated from body weight and testicular weight, this model should be able to be used to estimate the reproductive state of male raccoons regardless of season and age when just these two parameters are known. In this study, GSI was demonstrated to be an index of reproductive state in male raccoons. To our knowledge, this is the first report of such a use for GSI in a member of the Carnivora.

収録刊行物

被引用文献 (2)*注記

もっと見る

参考文献 (26)*注記

もっと見る

キーワード

詳細情報 詳細情報について

問題の指摘

ページトップへ