Crickets Lab Report

Crickets Lab Report - Metabolic Rate in Male and Female...

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Metabolic Rate in Male and Female House Crickets Biology 106 Section 40 Jinbo Song Abstract. The experiment was conducted to determine the effect of sex on metabolic rates of house crickets. Male and female house crickets of different body masses were used. The amount of oxygen consumed by male and female crickets was observed using repirometry devices and translated into metabolic rate using an equation for metabolic rate. Metabolic rates in females were significantly higher than metabolic rates in males (p<5%). Levels were 3.312 mL g -1 hr -1 in females and 2.835 mL g -1 hr -1 in males. INTRODUCTION Metabolic rate is affected by many factors including body size, temperature, and age (Kaisa, 2009). Sometimes sex can affect metabolic rate in insects. Sex differences in metabolic rate can result from dimorphism in the performance of energetically demanding activities (Kolluru, 2004). Male crickets engage in costly calling and aggressive activity not performed by females. Consistent with this difference, higher maximal metabolic rates, factorial scope, and fat contents have been found in male crickets than female crickets (Kolluru, 2004). House crickets already have a higher metabolic rate than most other insects. They expend two to three times the energy per unit of body mass when inactive as compared to other arthropods, such as beetles, ants and spiders (Hack, 1997). Sex is already known to be a factor that contributes to metabolic rate in insects. For example, some fleas show a higher resting metabolic rate in females than in males. On the other hand, the parasitoid fly has a higher resting metabolic rate in males than in females (Kaisa, 2009). The purpose of this study was to investigate how metabolic rate compares in male and female house crickets. Although house crickets and field crickets are closely related, they differ when it comes to metabolic rates between males and females (Kaisa, 2009). By examining how
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Crickets Lab Report - Metabolic Rate in Male and Female...

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