High carbohydrate consumption increases lipid storage and promotes migratory flight in locusts

Author:

Talal Stav1ORCID,Parmar Shivam1,Osgood Geoffrey M.1,Harrison Jon F.1,Cease Arianne J.12

Affiliation:

1. School of Life Science, Arizona State University 1 , Tempe, AZ 85287 , USA

2. School of Sustainability, Arizona State University 2 , Tempe, AZ 85287 , USA

Abstract

ABSTRACT Migration allows animals to track favorable environments and avoid harmful conditions. However, migration is energetically costly, so migrating animals must prepare themselves by increasing their energy stores. Despite the importance of locust migratory swarms, we still understand little about the physiology of locust migration. During long-distance flight, locusts rely on lipid oxidation, despite the fact that lipids are relatively rare in their leaf-based diets. Therefore, locusts and other insect herbivores synthesize and store lipid from ingested carbohydrates, which are also important for initial flight. These data suggest that diets high in carbohydrate should increase lipid stores and the capacity for migratory flight in locusts. As predicted, locust lipid stores and flight performance increased with an increase in the relative carbohydrate content in their food. However, locust flight termination was not associated with complete lipid depletion. We propose potential testable mechanisms that might explain how macronutrient consumption can affect flight endurance.

Funder

National Science Foundation

Publisher

The Company of Biologists

Subject

Insect Science,Molecular Biology,Animal Science and Zoology,Aquatic Science,Physiology,Ecology, Evolution, Behavior and Systematics

Reference58 articles.

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