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Competition, cooperation, and parental effects in larval aggregations formed on carrion by communally breeding beetles Necrodes littoralis (Staphylinidae: Silphinae)

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Insect Science 2024年第6期31卷 1918-1929页

作者： Natalia Lis Anna Mądra-Bielewicz Jędrzej Wydra Szymon Matuszewski Department of Animal Taxonomy and Ecology Adam Mickiewicz UniversityPoznańPoland Laboratory of Criminalistics Adam Mickiewicz UniversityPoznańPoland Wielkopolska Centre for Advanced Technologies Adam Mickiewicz UniversityPoznańPoland

Aggregations of juveniles are dominant forms of social life in some insect *** societies are shaped by competitive and cooperative interactions of the larvae,in parallel with parental *** of necrophagous larvae are excellent systems to study these *** littoralis(Staphylinidae:Silphinae),a carrion beetle that colonizes cadavers of large vertebrates,forms massive juvenile *** spreading over carrion anal and oral exudates,the beetles form the feeding matrix,in which the heat is produced and by which adults presumably affect the fitness of the *** predict that exploitative competition shapes the behavior of *** larvae in their ***,cooperative interactions may also operate in these systems due mainly to the benefits of collective ***,indirect parental effects(i.e.,formation of the feeding matrix)probably modulate larval interactions within the *** manipulating parental effects(present/absent)and larval density(0.02−1.9 larvae/g of meat),we found a strong negative group-size effect on fitness components of ***,in colonies with parental effects over almost the entire density range,and in colonies without parental effects for densities larger than 0.5 larva/*** was accompanied by positive group-size effects in terms of development time(it shortened with larval density)and thermogenesis(it increased with larval density).A pronounced positive group-size effect on juvenile fitness was found only in colonies without parental effects and only in the low-density *** results support the hypothesis that larval societies of *** are shaped by exploitation competition.

关键词： carrion group-size effect intraspecific interactions larval societies

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