Hissing Cockroaches

Topics: Carbon dioxide, Temperature, Insect Pages: 4 (1217 words) Published: February 27, 2012

Experimentation of Metabolic Rate on Gromphadorhina portentosa Ectotherms in Changing Temperatures Abstract
Temperature and environment plays a key role on the effects of an ectothermic organism’s metabolism. The specific ectothermic organism used in this study was the Gromphadorhina portentosa also known as the Madagascar Hissing Cockroach. In this study we measured CO2 production (%) and temperature (̊C) every three minutes for a total of 15 minutes in three different temperature environments. The three temperature environments conducted in the experiment included room temperature, a cold environment (ice bath), and a hot environment (how water bath). The purpose of this study was to test the effects of temperature change on the ectothermic organism Madagascar Hissing Cockroach (Gromphadorhina portentosa) and its metabolic rate. The null hypothesis was that there would be no change in metabolic rate and CO2 gas percentage levels despite changes in temperature. The alternative hypothesis was that the CO2 gas percentage levels from the ectothermic organism would change with changes in temperature. Our findings reject the null hypothesis and agree with the alternative hypothesis reflecting that the CO2 gas percentage levels from the ectothermic organism did change with changes in environmental temperature.

The relationship between ectotherms and metabolic rate is a close reflection of the environment that they are placed in. In a natural environment the temperature and conditions change throughout seasons and different weather conditions so it is essential to study the effects of these changes on an ectothemic organism’s metabolic rate. Metabolism of a living organism sums up the chemical reactions that take place with in the cells to perform work from energy used. An ectotherm is known as an animal whose internal temperature is a reflection of the environment and varies with external temperature. The experimental organism studied in...
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