Biology of <i>Synuchus cycloderus</i> (Coleoptera: Carabidae)—The seasonal activity, reproductive phenology and flight ability of adult populations

DOI Web Site
  • Shibuya Sonomi
    Graduate School of Frontier Sciences, The University of Tokyo Graduate School of Agricultural and Life Sciences, The University of Tokyo
  • Kiritani Keizi
  • Fukuda Kenji
    Graduate School of Frontier Sciences, The University of Tokyo Graduate School of Agricultural and Life Sciences, The University of Tokyo

Bibliographic Information

Other Title
  • クロツヤヒラタゴミムシの生態―成虫の季節消長，繁殖様式，飛翔能力
  • クロツヤヒラタゴミムシ ノ セイタイ : セイチュウ ノ キセツ ショウチョウ,ハンショク ヨウシキ,ヒショウノウリョク

Search this article

Description

<p>Synuchus cycloderus is a species widely distributed in forests of Japan. Because this species is sensitive to habitat changes, it was suggested as a bio-indicator. However, its ecology has been little studied. We studied its life history in a Satoyama landscape (Chiba, Japan). We counted S. cycloderus individuals caught in 32 pitfall traps 44 times during April 2012 to April 2013. Simultaneously, large scale surveys with a total of 196 traps were conducted once in June, July, September and October. To catch flying individuals, we set three malaise and 10 flight interception traps in 2013. We dissected 142 individuals out of 1,272 captured to analyze reproductive organs and flight muscles, and measured the lengths of body and hind wings for 901 individuals. Synuchus cycloderus emerged as adults in May and remained at low activity until July. Then they probably entered aestivation until October. They matured and became active in autumn. Mature females had 109 (average) with same size eggs, suggesting their high reproductive potential. Although hind wings were macropterous, the relative lengths of hind wing to body size and elytron were small. Also, no individuals possessed flight muscles and none of them were captured at flight interception traps, indicating that this species does not fly. Our research clarified the seasonal activity, reproductive phenology and flight ability of S. cycloderus by combining field studies with dissection. This study would provide a base line research not only for Synuchus species, but also for other carabids that can be candidates of bio-indicators.</p>

Journal

Keywords

Details 詳細情報について

Report a problem

Back to top