Lifetime nutrient dynamics reveal simultaneous capital and income breeding in a parasitoid

Models of host handling decisions and physiologically structured host–parasitoid population dynamics make diverging assumptions, untested as of this writing, about the allocation rules of nutrients to survival and reproduction. Our aim is to develop a data-rich multidimensional dynamical budget of nutrient acquisition and allocation in survival and reproduction in the host-feeding, synovigenic bruchid ectoparasitoid Eupelmus vuilletti (Hymenoptera: Eupelmidae) over the entire lifetime of the animal in order to address the above questions. We quantified sugar, glycogen, protein, and lipid reserves of single females at birth and death and their daily maintenance needs. We recorded each host-feeding and oviposition event over entire lifetimes and quantified the amounts acquired and invested in eggs using microcolorimetric techniques. We then built two nutrient budgets, with and without hosts, encompassing 20 measured biochemical parameters and tested their predictions using time of death. Carbohydrate reserv...

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