Conflicts of Interest Within Colonies

Wenseleers, Tom; Princen, Sarah A.; Oliveira, Ricardo Caliari; Oi, Cintia Akemi

doi:10.1007/978-3-030-28102-1_28

Cited by 1 publication

(2 citation statements)

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“…Social groups, including those of eusocial insects, represent concentrations of resources that are vulnerable to exploitation by external and internal cheaters (Beekman & Oldroyd, 2008; Bourke, 2011; Ghoul et al, 2014; Lhomme & Hines, 2018; Wenseleers et al, 2021). Cheating is frequently countered by the policing behaviours of other group members (Ratnieks, 1988; Ratnieks & Wenseleers, 2005; Singh & Boomsma, 2015), but the effectiveness of policing behaviours in different contexts has been investigated in detail in relatively few systems (Endler et al, 2006; Karcher & Ratnieks, 2014; Oi et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

“…Both queens and workers in the eusocial Hymenoptera frequently police other individuals' reproduction, especially via egg eating, with queens typically eating workers' eggs (queen policing) and workers eating eggs laid by other workers (worker policing) (Ratnieks, 1988; Singh & Boomsma, 2015; Wenseleers & Ratnieks, 2006). In many species, this policing acts as a key mechanism to remove eggs laid by natal workers (Foster & Ratnieks, 2001a; Karcher & Ratnieks, 2014; Monnin & Peeters, 1997; Ratnieks & Visscher, 1989; Van Doorn & Heringa, 1986; Wenseleers et al, 2021; Wenseleers & Ratnieks, 2006). The ability to discriminate natal worker‐laid eggs from queen‐laid eggs appears to depend on differences in chemical cues on the surfaces of eggs (Endler et al, 2004; Oi et al, 2015; van Zweden et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

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Policing is more effective against eggs of non‐natal versus natal workers at early colony stages in a bumblebee

et al. 2023

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Eusocial insect colonies are vulnerable to exploitation by egg‐laying workers arising either as natal reproductive workers or as non‐natal reproductive ‘drifting’ workers (intraspecific social parasites). Worker egg‐laying is potentially costly to the colony, but queens and workers can counter its costs via egg eating (queen or worker policing). Bumblebee colonies exhibit egg laying by both natal and non‐natal workers: natal workers collectively lay more eggs but do so only after a specific point in the colony cycle, the ‘competition point’, whereas non‐natal workers potentially lay eggs throughout the colony cycle. These features create a special opportunity to investigate whether policing of worker‐laid eggs is context‐dependent (i.e. depends on worker origin of eggs and/or colony stage). We introduced artificial egg cells containing eggs laid by either natal or non‐natal workers into colonies of the bumblebee Bombus terrestris both before and after their competition points and observed the fate of introduced egg cells and eggs. In both colony stages, the majority of introduced egg cells and eggs were policed, demonstrating that policing was not activated only after the competition point. However, in the pre‐competition point stage alone, a smaller proportion of non‐natal workers' eggs (15%) remained after 20 h compared to the proportion of natal workers' eggs remaining (24%). More effective policing of non‐natal workers' eggs early in the colony cycle potentially represents an adaptive, context‐dependent response to the stage in the cycle when all worker‐laid eggs are normally unrelated to the natal colony.

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