Effect of Different Photoperiods on Gonadal Maintenance and Development in Mongolian Gerbils (Meriones unguiculatus)(Reproductive Biology) :

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著者

    • Karakas Alper Karakas Alper
    • Department of Biology, Faculty of Arts and Sciences, Abant Izzet Baysal University Department of Biology, Faculty of Arts and Sciences, Abant Izzet Baysal University
    • Gunduz Bulent Gunduz Bulent
    • Department of Biology, Faculty of Arts and Sciences, Abant Izzet Baysal University Department of Biology, Faculty of Arts and Sciences, Abant Izzet Baysal University

抄録

The role of photoperiod in adult testicular maintenance and body weight and juvenile development was assessed in male Mongolian gerbils (Meriones unguiculatus). Gerbils were raised on a 14L (14 hr of light) photoperiod. In the first study, adult gerbils with functional testes were transferred to thirteen different photoperiods (OL, 2L, 4L, 6L, 8L, 10L, 12L, 14L, 16L, 18L, 20L, 22L, or 24L) and body weights and testicular size were measured every week for 10 weeks. Body weights were similar in all groups. Testicular regression had occurred in animals housed on OL, 2L, 4L, 6L, 8L, and 24L by week 10. In the second study, 14L-born prepubertal gerbils were transferred to thirteen different photoperiods as in the first study. Body weights and testicular development were examined for 10 weeks. At the end of 10 weeks the body weights of animals in all groups except 24L were similar to those of adults. Animals in 24L had a lower body weight gain. Exposure to OL, 2L, and 24L inhibited testicular development and testes weights were significantly different from those of the other groups. These results demonstrate that maintenance of body weight in adult gerbils appears to be independent of photoperiodic signal. Exposure to very long (24L) and short photoperiods (<10 hr) causes testicular regression in adult gerbils. Moreover, different photoperiods experienced in early life can influence prepubertal testis growth and body weight gain.

The role of photoperiod in adult testicular maintenance and body weight and juvenile development was assessed in male Mongolian gerbils (Meriones unguiculatus). Gerbils were raised on a 14L (14 hr of light) photoperiod. In the first study, adult gerbils with functional testes were transferred to thirteen different photoperiods (OL, 2L, 4L, 6L, 8L, 10L, 12L, 14L, 16L, 18L, 20L, 22L, or 24L) and body weights and testicular size were measured every week for 10 weeks. Body weights were similar in all groups. Testicular regression had occurred in animals housed on OL, 2L, 4L, 6L, 8L, and 24L by week 10. In the second study, 14L-born prepubertal gerbils were transferred to thirteen different photoperiods as in the first study. Body weights and testicular development were examined for 10 weeks. At the end of 10 weeks the body weights of animals in all groups except 24L were similar to those of adults. Animals in 24L had a lower body weight gain. Exposure to OL, 2L, and 24L inhibited testicular development and testes weights were significantly different from those of the other groups. These results demonstrate that maintenance of body weight in adult gerbils appears to be independent of photoperiodic signal. Exposure to very long (24L) and short photoperiods (<10 hr) causes testicular regression in adult gerbils. Moreover, different photoperiods experienced in early life can influence prepubertal testis growth and body weight gain.

収録刊行物

  • Zoological science

    Zoological science 19(2), 233-239, 2002

    社団法人 日本動物学会

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各種コード

  • NII論文ID(NAID)
    110003372732
  • NII書誌ID(NCID)
    AA10545874
  • 本文言語コード
    ENG
  • 資料種別
    ART
  • ISSN
    02890003
  • NDL 記事登録ID
    6265023
  • NDL 雑誌分類
    ZR4(科学技術--生物学--動物)
  • NDL 請求記号
    Z53-Y164
  • データ提供元
    CJP書誌  CJP引用  NDL  NII-ELS  IR  J-STAGE  NDL-Digital 
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