Factors promoting maternal trophic egg provisioning in non-eusocial animals

スポンサーリンク

概要

• 論文の詳細を見る

• The adaptive function of trophic egg-laying is generally regarded as extended parental investment to the offspring. However, the evolutionary factors promoting trophic egg-laying are still unclear, because the amount of maternal investment per offspring should be ideally equal between smaller offspring with trophic eggs and larger offspring without any additional investment. Several authors have suggested that trophic egg-laying should evolve only when egg size is constrained, but this hypothesis has not been evaluated. We investigated the evolutionary mechanisms of trophic egg-laying by two different approaches. First, we evaluated morphological constraints on egg size in two sibling ladybird species, Harmonia axyridis, which is known to produce trophic eggs, and H. yedoensis. Second, we theoretically predicted the optimal proportion of trophic eggs to total eggs and egg size in relation to environmental heterogeneity, predictability of environmental quality, and investment efficiency of trophic egg consumption. The intra- and interspecific morphological comparisons suggest that morphological constraints on the evolutionary determination of egg size are weak at best in the two ladybird species. Moreover, we theoretically showed that small egg size and trophic egg-laying are favoured in heterogeneous environments when mothers cannot adjust egg size plastically. We also showed that even a small reduction in investment efficiency makes a trophic egg strategy unlikely, despite relatively high environmental predictability. We conclude that trophic egg provisioning may be a flexible maternal adaptation to a highly heterogeneous environment rather than a response to a morphological constraint on egg size.

• 2012-07-01

著者

• Osawa Naoya

  Laboratory Of Entomology Faculty Of Agriculture Kyoto University

• Suzuki Noriyuki

  Laboratory Of Insect Ecology Graduate School Of Agriculture Kyoto University

• KAWATSU Kazutaka

  Laboratory of Insect Ecology, Graduate School of Agriculture, Kyoto University

関連論文

• The effects of herbivory and soil fertility on the growth patterns of Quercus serrata and Q. crispula saplings at the shoot and individual levels
• Behavior of four broad-leaved tree species used to revegetate eroded granite hill slopes
• Colonization Patterns of Aulacorthum magnolidae (Aphididae : Homoptera) on Sambucus sieboldiana (Caprifoliaceae); the Impact of Predatory Disturbance on an Aphid Colony and the Effects of Aphid Colonization on Plant Structure
• Impact of Mast Fruiting on Abundance of Vespid Wasps (Hymenoptera) in a Lowland Tropical Forest of Peninsular Malaysia
• Parasitoid Community Associated with the Leafroller Eudemis gyrotis (Lepidoptera, Tortricidae) on a Bayberry, Myrica rubra (Myricaceae)
• Effect of Pupation Site on Pupal Cannibalism and Parasitism in the Ladybird Beetle Harmonia axyridis PALLAS (Coleoptera, Coccinellidae)
• The Effect of Shoot Growth of Spiraea thunbergii(Rosaceae)on Colonization of Aphis spiraecola(Homoptera : Aphididae)
• Generalist pollinators in the dioecious shrub Rhus trichocarpa Miq. (Anacardiaceae) and their role in reproductive success
• A Life Table of the Ladybird Beetle Harmonia axyridis PALLAS (Coleoptera, Coccinellidae) in Relation to the Aphid Abundance
• Population field studies on the aphidophagous ladybird beetle Harmonia axyridis (Coleoptera:Coccinellidae):resource tracking and population characteristics
• Factors promoting maternal trophic egg provisioning in non-eusocial animals
• Life-history traits related to diapause in univoltine and bivoltine populations of Ypthima multistriata (Lepidoptera : Satyridae) inhabiting similar latitudes
• New host record for three scuttle flies, Megaselia flava, M. kanekoi and M. gotoi (Diptera : Phoridae), on the poisonous fungus Amanita ibotengutake (Agaricales : Amanitaceae)

もっと見る 閉じる

スポンサーリンク