Temporal variation in reproductive allocation in a shield bug Elasmostethus interstinctus

Mappes, Johanna; Kaitala, Arja; Rinne, Veikko

doi:10.1111/j.1469-7998.1996.tb05483.x

Cited by 9 publications

(10 citation statements)

References 6 publications

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“…higher survival, and larger adult size) in hemipteran insects (e.g., Solbreck et al 1989;McLain and Mallard 1991;Toda et al 1995;Mohaghegh et al 1998), as well as in other insect taxa (Fox and Czesak 2000). This is also the case for the genus Elasmucha and the closely related genus Elasmostethus Fieber, 1860 (Mappes et al 1996(Mappes et al , 1997. In addition, larger Elasmucha nymphs that hatched from larger eggs would be superior in sibling competition for the safest area, i.e., the centre of the brood guarded by the female (Mappes et al 1997).…”

Section: Clutch Sizementioning

confidence: 90%

Within-clutch egg-size variation in a subsocial bug: the positional effect hypothesis

Kudo

2006

Can. J. Zool.

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If there are differences in predation risk among the offspring within a clutch, parents should allocate less resources to the offspring facing higher risk. Predation risk, and thus offspring size, may depend on the spatial position of individual offspring within a clutch. To test this positional effect hypothesis, I examined egg-size (egg-mass) variation in the subsocial bug Elasmucha signoreti Scott, 1874 (Hemiptera: Acanthosomatidae). In subsocial insects, including Elasmucha , in which females guard their clutches against predators by covering the clutch with their bodies, there are large differences in survival between offspring at the centre and at the periphery of the clutch. There was considerable variation in reproductive output among females; female body size was positively correlated with egg mass but not with clutch size. Females laid significantly lighter eggs in the peripheral, and thus more vulnerable, part of the clutch. No phenotypic trade-off between egg mass and clutch size was detected. Egg mass was positively correlated with hatched first-instar nymph mass. Thus, E. signoreti females seem to allocate their resources according to the different predation risks faced by the offspring within a clutch. I suggest that the positional effect hypothesis can generally be applicable to species whose females lay eggs in clutches and that the eggs suffer different mortality rates which depend on their spatial positions within the clutch.

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Section: Clutch Sizementioning

confidence: 90%

Within-clutch egg-size variation in a subsocial bug: the positional effect hypothesis

Kudo

2006

Can. J. Zool.

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“…Since hatching weight affects future survival in many insects (see, e.g. Mappes et al 1996), hatching weight was taken as a covariate. Population and temperature were entered as fixed factors and family nested within population as a random factor in the ANCOVA model.…”

Section: Discussionmentioning

confidence: 99%

Quantitative genetic approach for assessing invasiveness: geographic and genetic variation in life-history traits

et al. 2007

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Predicting the spread of invasive species is a challenge for modern ecology. Although many invasive species undergo genetic bottlenecks during introduction to new areas resulting in a loss of genetic diversity, successful invaders manage to flourish in novel environments either because of pre-adaptations or because important traits contain adaptive variation enabling rapid adaptation to changing conditions. To predict and understand invasion success, it is crucial to analyse these features. We assessed the potential of a well-known invader, the Colorado potato beetle (Leptinotarsa decemlineata), to expand north of its current range in Europe. A short growing season and harsh overwintering conditions are apparent limiting factors for this species' range. By rearing full-sib families from four geographically distinct populations (Russia, Estonia, Poland, Italy) at two fluctuating temperature regimes, we investigated (a) possible differences in survival, development time, and body size among populations and (b) the amount of adaptive variation within populations in these traits. All populations were able to complete their development in cooler conditions than in their current range. A significant genotype-environment interaction for development time and body size suggests the presence of adaptive genetic variation, indicating potential to adapt to cooler conditions. The northernmost population had the highest survival rates and fastest development times on both temperature regimes, suggesting pre-adaptation to cooler temperatures. Other populations had minor differences in development times. Interestingly, this species lacks the classical trade-off between body size and development time which could have contributed to its invasion potential. This study demonstrates the importance of considering both ecological and evolutionary aspects when assessing invasion risk

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“…higher developmental rates, larger adult size and/or higher survival in heteropterans (e.g. Solbreck et al 1989, McLain and Mallard 1991, Toda et al 1995, Mohaghegh et al 1998 including subsocial Elasmucha and asocial Elasmostethus species (Mappes et al 1996. Such advantages probably depend directly on egg size, i.e.…”

Section: Discussionmentioning

confidence: 99%

Intraclutch egg‐size variation in acanthosomatid bugs: adaptive allocation of maternal investment?

Kudo¹

2001

Oikos

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If there are differences in predation risk among the offspring within a clutch, parents may allocate less resources to the offspring facing higher risk. I examined parental investment in terms of egg size within clutches in five species of stink bugs (Heteroptera, Acanthosomatidae). In subsocial Elasmucha and Sastragala species, the female guards her eggs and first‐instar nymphs against invertebrate predators by covering her clutch with her body. Large differences in survival from predation between offspring at the centre and offspring at the periphery of the clutch have been reported in such subsocial insects. I found that Elasmucha and Sastragala females laid significantly smaller eggs in the peripheral (and thus more vulnerable) part of the clutch. Phenotypic trade‐offs between egg size and clutch size were detected in these subsocial species. Egg size was positively correlated with hatched first‐instar nymph size: smaller nymphs hatched from smaller peripheral eggs. In asocial Elasmostethus humeralis, however, no significant difference in size was detected between the eggs at the centre of and those at the periphery of the clutch. Thus, in subsocial acanthosomatid bugs, females seem to allocate their resources according to the different predation risks faced by the offspring within the clutch.

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Temporal variation in reproductive allocation in a shield bug Elasmostethus interstinctus

Cited by 9 publications

References 6 publications

Within-clutch egg-size variation in a subsocial bug: the positional effect hypothesis

Within-clutch egg-size variation in a subsocial bug: the positional effect hypothesis

Quantitative genetic approach for assessing invasiveness: geographic and genetic variation in life-history traits

Intraclutch egg‐size variation in acanthosomatid bugs: adaptive allocation of maternal investment?

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