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Effects of food quality on trade-offs among growth, immunity and survival in the greater wax moth Galleria mellonella

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Insect Science 2015年第3期22卷 431-439页

作者： Indrikis Krams sa.ita.kecko Katariina Kangassalo Fhionna R. Moore Eriks Jankevics Inna Inashkina Tatjana Krama Vilnis Lietuvietis Laila Meija Markus J. Rantala Institute of Systematic Biology University of Daugavpils 5401 Daugavpils Latvia Institute of Ecology and Earth Sciences University of Tartu 51014 Tartu Estonia Department of Biology Section of Ecology University of Turku 20014 Turku Finland School of Psychology University of Dundee Dundee DD1 4HN UK Latvian Biomedical Research and Study Centre 1067 RTga Latvia Department of Plant Protection Institute of Agricultural and Environmental Sciences Estonian University of Life Science Tartu Estonia Riga Stradins University 1007 Riga Latvia

The resources available to an individual in any given environment are finite, and variation in life history traits reflect differential allocation of these resources to competing life functions. Nutritional quality of food is of particular importance in these life history decisions. In this study, we tested trade-offs among growth, immunity and survival in 3 groups of greater wax moth （Galleria mellonella） larvae fed on diets of high and average nutritional quality. We found rapid growth and weak immunity （as measured by encapsulation response） in the larvae of the high-energy food group. It took longer to develop on food of average nutritional quality. However, encapsulation response was stronger in this group. The larvae grew longer in the low-energy food group, and had the strongest encapsulation response. We observed the highest survival rates in larvae of the low-energy food group, while the highest mortality rates were observed in the high-energy food group. A significant negative correlation between body mass and the strength of encapsulation response was found only in the high-energy food group revealing significant competition between growth and immunity only at the highest rates of growth. The results of this study help to establish relationships between types of food, its nutritional value and life history traits of G. mellonella larvae.

关键词： Galleria mellonella growth immunity life history nutrition survival

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