Seasonal Adaptation in a Northernmost Population of Epilachna admirabilis (Coleoptera : Coccinellidae) II. Effect of day-length and temperature on the ovary development

• HOSHIKAWA Kazuo

  Faculty of Life and Environmental Science, Shimane University

Bibliographic Information

Other Title

• 北限付近のトホシテントウにおける季節適応 II. 卵巣の発育と退化に及ぼす日長と温度の影響
• 北限付近のトホシテントウにおける季節適応(2)卵巣の発育と退化に及ぼす日長と温度の影響
• ホクゲン フキン ノ トホシテントウ ニ オケル キセツ テキオウ 2 ランソウ ノ ハツイク ト タイカ ニ オヨボス ニッチョウ ト オンド ノ エイキョウ

Abstract

Differing from southern populations in Tokyo, females of the northernmost population of Epilachna admirabilis in Sapporo started ovary development soon after emergence, and entered reproductive diapause under short-day photoperiod<14.5 L in autumn. A part of adults hibernated occasionally, and oviposited again from the next June. Oviposition by post-hibernating females occurred in a range of day lengths &ge;14 L and 15-27℃, but their ovarioles developed up to halfway even under a short-day photoperiod, 10 L. Although velocity of the ovary development was slightly affected by day length females exposed, threshold of the development was 7.9℃ and thermal constant was 219℃-days at 16 L condition. Mature ovary of newly emerged females degenerated under day lengths &le;14 L, and repeatedly developed in long-day photoperiod conditions.

Journal

• Japanese Journal of Entomology (New Series)

  Japanese Journal of Entomology (New Series) 3 (2), 55-63, 2000-06-25

  Entomological Society of Japan

Keywords

• Epilachna admirabilis
• Coccinellidae
• ovary development
• voltinism

Details

• CRID: 1390282763049048064
• NII Article ID: 110003374837
• NII Book ID: AA11248127
• DOI: 10.20848/kontyu.3.2_55
• ISSN: 24320269
• ISSN: 13438794
• NDL BIB ID: 5414287
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I5414287
• Text Lang: ja
• Data Source:
  • JaLC
  • NDL
  • CiNii Articles
• Abstract License Flag: Disallowed