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Have female twisted-wing parasites (Insecta: Strepsiptera) evolved tolerance traits as response to traumatic penetration?

Jandausch, Kenny ; Michels, Jan; Kovalev, Alexander; Gorb, Stanislav N.; van de Kamp, Thomas ORCID iD icon 1,2; Beutel, Rolf Georg; Niehuis, Oliver; Pohl, Hans
1 Laboratorium für Applikationen der Synchrotronstrahlung (LAS), Karlsruher Institut für Technologie (KIT)
2 Institut für Photonenforschung und Synchrotronstrahlung (IPS), Karlsruher Institut für Technologie (KIT)


Traumatic insemination describes an unusual form of mating during which a male penetrates the body wall of its female partner to inject sperm. Females unable to prevent traumatic insemination have been predicted to develop either traits of tolerance or of resistance, both reducing the fitness costs associated with the male-inflicted injury. The evolution of tolerance traits has previously been suggested for the bed bug. Here we present data suggesting that tolerance traits also evolved in females of the twisted-wing parasite species $\textit{Stylops ovinae}$ and $\textit{Xenos vesparum}$. Using micro-indentation experiments and confocal laser scanning microscopy, we found that females of both investigated species possess a uniform resilin-rich integument that is notably thicker at penetration sites than at control sites. As the thickened cuticle does not seem to hamper penetration by males, we hypothesise that thickening of the cuticle resulted in reduced penetration damage and loss of haemolymph and in improved wound sealing. To evaluate the evolutionary relevance of the $\textit{Stylops}$-specific paragenital organ and penis shape variation in the context of inter- and intraspecific competition, we conducted attraction and interspecific mating experiments, as well as a geometric-morphometric analysis of $\textit{S ovinae}$ and $\textit{X vesparum}$ penises. ... mehr

Verlagsausgabe §
DOI: 10.5445/IR/1000151050
Veröffentlicht am 11.10.2022
DOI: 10.7717/peerj.13655
Zitationen: 5
Zitationen: 5
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Photonenforschung und Synchrotronstrahlung (IPS)
Laboratorium für Applikationen der Synchrotronstrahlung (LAS)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2022
Sprache Englisch
Identifikator ISSN: 2167-8359
KITopen-ID: 1000151050
HGF-Programm 56.13.11 (POF IV, LK 01) Building Blocks of Life: Structure and Function
Erschienen in PeerJ
Verlag PeerJ
Band 10
Seiten Art.Nr. e13655
Vorab online veröffentlicht am 16.08.2022
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