The influence and interaction of dietary protein:carbohydrate balance and parasitism by Cotesia congregata on nutrient intake and growth were examined over the last two larval stadia of Manduca sexta. Effects of nutritional status on host blood metabolite concentrations
نویسندگان
چکیده
Nutrition is the essential connection between an animal and its environment, providing the energy and the chemicals necessary for survival. Animals acquire nutrients through an integration of behavior and physiology that is considered the subject of nutritional ecology (House, 1977; Slansky, 1982). This integration ensures that an optimal quantity and balance of the required nutrients are consumed and available for growth, development and reproduction (Simpson and Raubenheimer, 1993a; Raubenheimer and Simpson, 1999). During multitrophic interactions, nourishment of a predator or parasite is achieved by prior provision of nutrients to herbivorous hosts and prey. Additionally, nourishment of The Journal of Experimental Biology 208, 611-623 Published by The Company of Biologists 2005 doi:10.1242/jeb.01404
منابع مشابه
Host nutrition determines blood nutrient composition and mediates parasite developmental success: Manduca sexta L. parasitized by Cotesia congregata (Say).
This investigation examined the influence of dietary protein and carbohydrate balance in a chemically defined artificial diet for Manduca sexta larvae on development of the gregarious parasite Cotesia congregata. Normal unparasitized larvae and larvae superparasitized in the fourth stadium were reared to the end of the fifth stadium on six diets, each having the same total amount of casein and ...
متن کاملAltered dietary nutrient intake maintains metabolic homeostasis in parasitized larvae of the insect Manduca sexta L.
Manduca sexta larvae exhibited altered food selection over a 2- or 3-day feeding period when parasitized by Cotesia congregata, and offered a choice of two chemically defined diets, one containing casein without sucrose and a second with sucrose but no casein. While normal larvae consumed the diets in a ratio of approximately 2:1 protein:carbohydrate (w/w), parasitized insects consumed a ratio ...
متن کاملOctopamine mimics the effects of parasitism on the foregut of the tobacco hornworm Manduca sexta.
The parasitic braconid wasp Cotesia congregata lays its eggs inside the body of the larval stage of its host, the moth Manduca sexta. The Cotesia congregata larvae develop within the hemocoel of their host until their third instar, when they emerge and spin cocoons and pupate on the outer surface of the caterpillar. From this time until their death approximately 2 weeks later, the Manduca sexta...
متن کاملFitness consequences of host plant choice : a fi eld experiment 542
Determining the relative contributions of diff erent ecological factors for herbivore fi tness is one key to understanding the ecology and evolution of host plant choice by herbivores. Natural enemies are increasingly being recognized as an important factor: host plants of inferior quality for development may still be used by herbivores if they provide enemy-free space (EFS). Here we used the t...
متن کاملA virus essential for insect host-parasite interactions encodes cystatins.
Cotesia congregata is a parasitoid wasp that injects its eggs in the host caterpillar Manduca sexta. In this host-parasite interaction, successful parasitism is ensured by a third partner: a bracovirus. The relationship between parasitic wasps and bracoviruses constitutes one of the few known mutualisms between viruses and eukaryotes. The C. congregata bracovirus (CcBV) is injected at the same ...
متن کامل