High Temperature Slows Down Growth in Tobacco Hornworms (Manduca Sexta Larvae) under Food Restriction
When fed ad libitum (AL), ectothermic animals usually grow faster and have higher metabolic rate at higher ambient temperature. However, if food supply is limited, there is an energy tradeoff between growth and metabolism. Here we hypothesize that for ectothermic animals under food restriction (FR), high temperature will lead to a high metabolic rate, but growth will slow down to compensate for the high metabolism. We measure the rates of growth and metabolism of 4 cohorts of 5th instar hornworms (Manduca sexta larvae) reared at 2 levels of food supply (AL and FR) and 2 temperatures (20 and 30°C). Our results show that, compared to the cohorts reared at 20°C, the ones reared at 30°C have high metabolic rates under both AL and FR conditions, but a high growth rate under AL and a low growth rate under FR, supporting this hypothesis.
M. B. Hayes et al., "High Temperature Slows Down Growth in Tobacco Hornworms (Manduca Sexta Larvae) under Food Restriction," Insect Science, vol. 22, no. 3, pp. 424-430, Blackwell Publishing Ltd, Jun 2015.
The definitive version is available at http://dx.doi.org/10.1111/1744-7917.12109
Keywords and Phrases
Energy Budget; Food Restriction; Growth; Hornworm; Metabolism; Tradeoff
International Standard Serial Number (ISSN)
Article - Journal
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