Effects of trophic-eggs on offspring performance and rivalry in a sub-social bug

作者: Shin-ichi Kudo , Taichi Nakahira

DOI: 10.1111/J.0030-1299.2004.13169.X

关键词: Parental investmentHatchingOffspringCydnidaeBiologyEcologyProgressive provisioningTrophic levelZoologyBroodOophagy

摘要: Trophic eggs, which are inviable and usually function as a food supply for offspring, have been regarded extended parental investment or the outcome of parent-offspring conflict in sibling oophagy. Adomerus triguttulus (Heteroptera: Cydnidae) is sub-social bug showing complex pattern maternal care, including progressive provisioning host seeds trophic-egg production. To investigate functions trophic we removed eggs from clutches under different resource conditions. The longevity nymphs was greatly by feeding upon when were excluded. When provided, enhanced their development, but there no significant effects on brood survival. Some viable also fed nymphs. However, difference proportion consumed between with without eggs. Females lay within first oviposition day. synchronous hatching resulting this mode seems to prevent sib-cannibalism. body size females affected relative eggs; larger produced more relatively fewer adaptive allocation discussed light two hypotheses mentioned above.

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