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Chaparro, M. A. E./ J. M. Lavornia/ M. A. E. Chaparro/ A. M. Sinito/ Pöykkö, H./ S. Mänttäri 2012: Egg size and composition in an ageing capital breeder. - Ecological Entomology 37(5): 330-341. [RLL List # 231 / Rec.# 34648]
Keywords: Atmospheric pollution/ Biomonitoring/ Lichen/ Magnetic susceptibility/ Multivariate analysis/ Atmospheric pollution/ Biomonitoring/ Biomonitors/ Control sites/ Grain size/ Industrial sites/ Lichen/ Magnetic Carriers/ Magnetic monitoring/ Magnetic studies/ Multi variate analysis/ Polluted sites/ SEM observation/ Study areas/ Toxic elements/ Tree barks/ Urban air pollution/ Air pollution/ Energy dispersive spectroscopy/ Fungi/ Grain size and shape/ Iron oxides/ Magnetic susceptibility/ Magnetism/ Scanning electron microscopy/ Urban growth/ iron oxide/ magnetite/ atmospheric pollution/ bioindicator/ biomonitoring/ grain size/ lichen/ magnetic susceptibility/ multivariate analysis/ pollution monitoring/ scanning electron microscopy/ size distribution/ urban pollution/ air monitoring/ air pollution/ Argentina/ article/ bark/ biological monitoring/ concentration (parameters)/ controlled study/ corticolous foliose lichen/ Dirinaria picta/ energy dispersive spectroscopy/ industrial area/ lichen (organism)/ magnetism/ microfoliose lichen/ nonhuman/ Parmotrema pilosum/ particle size/ pollution monitoring/ Punctelia hipoleucites/ scanning electron microscopy/ spectroscopy/ urban area/ Air Pollutants/ Air Pollution/ Cities/ Environmental Monitoring/ Lichens/ Magnetics/ Microscopy, Electron, Scanning/ Argentina/ Buenos Aires [Argentina]/ Tandil/ Dirinaria picta/ Parmotrema/ Punctelia/ Capital breeder/ Egg mass/ Egg provisioning/ Egg quality/ Hatchability/ Lichen/ aging population/ community composition/ developmental biology/ egg size/ fertilization (reproduction)/ hatching/ host-parasite interaction/ lichen/ lipid/ moth/ oviposition/ performance assessment/ protein/ survival/ Hexapoda/ Lepidoptera/ Parmelia sulcata/ Ramalina fraxinea
Abstract: 1. Egg size is often used as a proxy of egg quality although size and composition may vary, e.g. in insects egg size usually decreases as female ages. Whether this decrease in size reflects reduced concentrations of essential nutrients such as lipids and proteins of eggs laid by ageing females, or does reduced size per se explain often observed lower fitness of later laid eggs is poorly explored. 2. Egg properties were compared with fitness parameters of offspring laid on the first and fourth night during the oviposition period of a capital breeding moth, Cleorodes lichenaria (Hufnagel). The study aim was to explore whether decreased egg size is caused by decreased provisioning into later laid eggs measured as egg protein and lipid concentration, and whether it results in lower fitness of later laid offspring. 3. The fresh and dry weight of eggs decreased over the oviposition period, but the protein and lipid concentration remained constant. Survival of larvae was lower among the fourth night laid offspring on a low quality host Parmelia sulcata Taylor compared to a high quality host Ramalina fraxinea (L.) Ach. No differences were observed in egg fertility or hatchability, neonate survival without food and pupal mass between the offspring produced on different nights. 4. Decreased survival of offspring produced later was rather attributable to absolute provisioning (i.e. lower weight of eggs) than relative provisioning (i.e. decreased concentrations of nutrients in eggs). It is argued that lower survival of later laid smaller eggs on low quality diet is likely attributable to physical and chemical characteristics of host lichens and/or physical properties of tiny neonate larvae. © 2012 The Royal Entomological Society.
URL: http://dx.doi.org/10.1111/j.1365-2311.2012.01369.x
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