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

Katoh, Ko; Iwasaki, Masazumi; Hosono, Shouhei; Yoritsune, Atsushi; Ochiai, Masanori; Mizunami, Makoto; Nishino, Hiroshi

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

Katoh, Ko; Iwasaki, Masazumi; Hosono, Shouhei et al.

Zoological Letters, 2017, 3(3), 1-9

Permalink : https://hdl.handle.net/2115/64778

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アクセス権	open access
URI	https://hdl.handle.net/2115/64778
タイトル	Group-housed females promote production of asexual ootheca in American cockroaches
著者	Katoh, Ko ; Iwasaki, Masazumi ; Hosono, Shouhei ; Yoritsune, Atsushi ; Ochiai, Masanori ; Mizunami, Makoto ; Nishino, Hiroshi
著者名 Katoh, Ko
著者名 Iwasaki, Masazumi
著者名 Hosono, Shouhei
著者名 Yoritsune, Atsushi
e-Rad_Researcher 10241382 著者名 Ochiai, Masanori
e-Rad_Researcher 30174030 著者名 Mizunami, Makoto
e-Rad_Researcher 80332477 著者名 Nishino, Hiroshi
言語	英語
キーワード	Cockroaches
	Sexual reproduction
	Parthenogenesis
	group effect
	Sex pheromone
	Antenna
	Chemosensory signal
	Periplanone
発行日	2017-03-13
出版者	BioMed Central
収録物名	Zoological Letters
巻(号)	3(3)
ページ	1-9
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.
資源タイプ	学術雑誌論文
出版タイプ	Version of Record
権利情報	Creative Commons Attribution 4.0 International
EISSN	2056-306X
関連情報 (isIdenticalTo)	出版社版DOI https://doi.org/10.1186/s40851-017-0063-x