Male Preference for Large Females and Female Reproductive Condition in the Japanese Beetle, Popillia japonica Newman (Coleoptera: Scarabaeidae)

Saeki, Yoriko; Kruse, Kipp C.; Switzer, Paul

doi:10.2317/jkes-0312.14.1

Cited by 30 publications

(21 citation statements)

References 28 publications

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“…Saeki et al. (2005a), in a laboratory study specifically looking at how social environment affected mate guarding in Japanese beetles, found a positive relationship between female, but not male, size and guarding duration (see also Saeki et al. 2005b); however, the beetles in that study were held in groups.…”

Section: Discussionmentioning

confidence: 95%

Physiological Costs of Mate Guarding in the Japanese Beetle (Popillia japonica Newman)

2005

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Males of many insects directly defend their mates from rival males (i.e. mate guard) as a way to avoid sperm competition and thus increase their reproductive success. However, mate guarding may have associated costs for these males. We examined costs of mate guarding in Japanese beetles (Popillia japonica), a pest species which exhibits post-copulatory mate guarding during which the guarding male cannot feed. In this species, food provides both energy and water for thermoregulation. Consequently, we focused on possible thermoregulatory and energetic costs of their mate guarding. In a field study, we found that guarding males had significantly higher thoracic temperatures than non-guarding males, indicating a difference in their ability and/or need to thermoregulate. Paired males had significantly lower water levels than single males in the morning and evening, but not in the afternoon. In the laboratory, we found that mate-guarding duration was significantly shorter at higher ambient temperature than at lower temperature, and males that had been starved guarded for less time than males that had not been starved. Our results suggest that because guarding males are unable to feed, they suffer energetic and thermoregulatory costs that appear to limit the amount of time that they can guard a female.

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Section: Discussionmentioning

confidence: 95%

Physiological Costs of Mate Guarding in the Japanese Beetle (Popillia japonica Newman)

2005

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“…Secondly, female weight generally predicts fecundity in spiders and the variation can be large enough to make a true difference to male reproductive success. Many studies have demonstrated male preferences for fecund females in spiders and insects (Bonduriansky 2001;Danielson-Francois et al 2002;Saeki et al 2005;Schulte et al 2010;MacLeod & Andrade 2014). However, preferences for virgins tend to be stronger (Rittschof 2011) particularly if effective mechanisms that secure first male sperm precedence are in place (Simmons 2001).…”

Section: Discussionmentioning

confidence: 99%

Context‐ and State‐Dependent Male Mate Choice in a Sexually Cannibalistic Spider

et al. 2016

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High male mating investment may favor selection on male mate choice particularly if females vary in quality. Terminal investment strategies constitute a maximal mating effort and have evolved independently in the absence of paternal investment in several spider taxa including the genus Argiope. To test for male mate preferences in the above context, we used the sexually cannibalistic spider A. bruennichi. We varied male state (mating status and post-maturation age) as well as the competitive context and quantified male mate choice decisions between females of different states and developmental stages in binary choice tests. We found an overall adaptive preference for the virgin against the mated female regardless of male mating state. Furthermore, we demonstrated that older males paid more attention to female fecundity-related traits than to mating status. In a second set of experiments, we offered males a choice between a virgin and a subadult female and varied the competitive context which had no effect on male decisions. Curiously, a preference for the virgin adult female was only apparent after exclusion of females that matured <3 d prior to the test. Repeated tests of males supported the hypothesis that males do not distinguish between a freshly matured virgin female and a subadult female. Our results show that male spiders execute mate choice based on information collected from female silk strands and that they integrate their own state into mating decisions.

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“…At the end of each experiment, all beetles captured were sexed using foreleg morphology (Smith and Hadley 1926), size was determined using their maximum pronotum width (Van Timmeren et al 2000), and the females were dissected to obtain mature egg counts (Saeki et al 2005). Below we detail three experiments that were conducted to compare the characteristics of pioneer and joiner beetles.…”

Section: Methodsmentioning

confidence: 99%

“…Second, high and low egg load females may have different mating strategies. Male Japanese beetles seem to prefer larger females, which may have more and larger eggs (Switzer et al 2001;Saeki et al 2005;Switzer et al 2008). Thus, if females with relatively low egg loads do need to remate (e.g.…”

Section: Femalesmentioning

confidence: 97%

Dynamics of Aggregation Formation in Japanese Beetles, Popillia japonica

Kowles

Switzer

2011

J Insect Behav

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Male Preference for Large Females and Female Reproductive Condition in the Japanese Beetle, Popillia japonica Newman (Coleoptera: Scarabaeidae)

Cited by 30 publications

References 28 publications

Physiological Costs of Mate Guarding in the Japanese Beetle (Popillia japonica Newman)

Physiological Costs of Mate Guarding in the Japanese Beetle (Popillia japonica Newman)

Context‐ and State‐Dependent Male Mate Choice in a Sexually Cannibalistic Spider

Dynamics of Aggregation Formation in Japanese Beetles, Popillia japonica

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