Search results for "yhteiskuntahyönteiset"

showing 4 items of 4 documents

Sex-allocation conflict and sexual selection throughout the lifespan of eusocial colonies.

2018

AbstractModels of sex allocation conflict are central to evolutionary biology but have mostly assumed static decisions, where resource allocation strategies are constant over colony lifespan. Here, we develop a model to study how the evolution of dynamic resource allocation strategies is affected by the queen-worker conflict in annual eusocial insects. We demonstrate that the time of dispersal of sexuals affects the sex allocation ratio through sexual selection on males. Furthermore, our model provides three predictions that depart from established results of classic static allocation models. First, we find that the queen wins the sex allocation conflict, while the workers determine the max…

0106 biological sciences0301 basic medicineConflictconflictmedia_common.quotation_subjectLongevitylife-history strategyresursointiBiology010603 evolutionary biology01 natural sciencesModels BiologicalLife history theory03 medical and health sciencesGeneticsAnimalsEcology Evolution Behavior and SystematicsSex allocationmedia_commonsex allocationsocial insectsoptimal resource allocationLongevityOriginal ArticlesMating Preference AnimalSex Determination ProcessesyhteiskuntahyönteisetEusocialityHymenoptera030104 developmental biologyAnimals; Hymenoptera/growth & development; Hymenoptera/physiology; Longevity; Mating Preference Animal; Models Biological; Sex Determination Processes; Conflict; life-history strategy; optimal resource allocation; sex allocation; social insectssukupuolivalintaSexual selectionResource allocationBiological dispersalDemographic economicsOriginal Articlelife‐history strategyGeneral Agricultural and Biological SciencesaitososiaalisuusDynamic resourceEvolution; international journal of organic evolution
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Different trophic positions among social vespid species revealed by stable isotopes

2021

The social vespid wasps are common insect predators and several species behave in unison in the same biotopes. It is commonly accepted that social wasps are mainly opportunistic generalist predators without differences in prey selection and hence they compete for the same food resources. Trophic positions of six vespid wasp species and their potential prey from four sites in Finland and one in the UK were evaluated using carbon and nitrogen stable isotopes (δ13C and δ15N). The difference in isotope values indicated different trophic positions among species. In general, Dolichovespula spp. showed higher δ15N values than Vespula spp., which suggests that Dolichovespula forage on higher trophi…

Ecology Conservation and Global Change BiologyhiilicarbonScienceQDolichovespulayhteiskuntahyönteisetnitrogentrophic positionekologinen lokerotyppiisotooppianalyysihyönteisetinsectVespulaampiaisetravintoketjutResearch ArticlesRoyal Society Open Science
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Nest characteristics and associates of Dolichovespula (Hymenoptera, Vespidae) in Central Finland

2023

In social vespine wasps, the nest characteristics and associates vary intra- and interspecifically. I studied the nest characteristics and nest associates of three Dolichovespula wasp species in boreal Finland. The average number of combs and cells per nest was similar among D. media, D. saxonica and D. norwegica, and similar to Dolichovespula in the temperate zone. Most D. media and D. saxonica colonies produced both gynes and males, whereas D. norwegica produced mainly either one. The average colony lifespan of D. saxonica was a bit over two months, i.e. shorter than documented for Dolichovespula in the temperate zone. The proportion of nests parasitised by the ichneumonid wasp Sphecophag…

Sphecophaga vesparumInsectaArthropodaAphomia sociellaDolichovespulasocial waspspesätyhteiskuntahyönteisetBiotaHymenopteracolony structureVespidaeVespoidealoisetpesäloisintaInsect ScienceAnimaliaVespinaekoitampiaisetEcology Evolution Behavior and SystematicsJournal of Hymenoptera Research
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New insights on the role of ecology and life-history in social evolution

2017

Biological altruism, defined as a behaviour that benefits others at an apparent cost to the focal individual, is found abundantly across different levels of biological organization. While kin selection has been useful for explaining both cooperation and conflict in specialized cooperative societies, more theoretical work has to be done to develop models for realistic ecological and life-history contexts. This thesis aims to fill this gap by providing several new insights on the role of ecology and life-history in various social systems. Firstly, I propose a model that incorporates realistic ecological mechanisms of population regulation and study how different population regulation mechanisms affe…

game theorycooperative breedingluonnonvalintalisääntymiskäyttäytyminenpistiäisetevoluutioeusocialitylisääntymineneläinten käyttäytyminenyhteiskuntahyönteisetyhteistyölife-history theoryoptimointievolutionary modelaltruismidynamic optimizationpeliteoriamatemaattiset mallitsukulaisvalintaampiaisetaitososiaalisuussocial evolution
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