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Group-housed females promote production of asexual ootheca in American cockroaches


Katoh et al., 2017.pdf1.64 MBPDF見る/開く

タイトル: Group-housed females promote production of asexual ootheca in American cockroaches
著者: Katoh, Ko 著作を一覧する
Iwasaki, Masazumi 著作を一覧する
Hosono, Shouhei 著作を一覧する
Yoritsune, Atsushi 著作を一覧する
Ochiai, Masanori 著作を一覧する
Mizunami, Makoto 著作を一覧する
Nishino, Hiroshi 著作を一覧する
キーワード: Cockroaches
Sexual reproduction
group effect
Sex pheromone
Chemosensory signal
発行日: 2017年 3月13日
出版者: BioMed Central
誌名: Zoological Letters
巻: 3
号: 3
開始ページ: 1
終了ページ: 9
出版社 DOI: 10.1186/s40851-017-0063-x
抄録: Background: Facultative parthenogenesis, seen in many animal phyla, is a reproductive strategy in which females are able to generate offspring when mating partners are unavailable. In some subsocial and eusocial insects, parthenogenesis is often more prevalent than sexual reproduction. However, little is known about how social cooperation is linked to the promotion of parthenogenesis. The domiciliary cockroach Periplaneta americana is well-suited to addressing this issue as this species belongs to the superfamily Blattoidea, which diverged into eusocial termites and shows facultative parthenogenesis.
Results: We studied environmental factors that influence asexual production of ootheca using behavioral assays in P. americana. When more than three virgin females immediately after the imaginal molt were kept together in a small sealed container, they tended to produce egg cases (oothecae) via parthenogenesis earlier than did isolated females, resulting in apparent synchronization of ootheca production, even among females housed in different containers. In contrast, virgin females housed with genitalia-ablated males or group-housed females with antennae ablated did not significantly promote ootheca production compared to isolated females. Daily addition of the primary sex pheromone component to the container did not promote ootheca production in isolated females. Another line of study showed that grouped females make parthenogenesis more sustainable than previously known; a founder colony of 15 virgin females was sufficient to produce female progeny for a period of more than three years.
Conclusions: Group-housed females promote and stabilize asexual ootheca production compared to isolated females, and that this promotion is triggered by female-specific chemosensory signals (other than sex pheromone) primarily detected by antennae. Promotion of ootheca production between females is likely to be an early stage of social cooperation, reminiscent of the foundation and maintenance of a colony by female pairs in the eusocial termite Reticulitermes speratus.
資料タイプ: article
出現コレクション:雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

提供者: 西野 浩史


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