Respiratory rate studies in arthropods refer to important physiological data, since these animals perform important ecosystem functions and because they are the greatest diversity and abundance of animals present on Earth. This study measures and describes respiratory rates through the emission of CO2, and relates them to the body mass of arthropods. The study was carried out in remnant fragments of coastal Atlantic Forest of Paraíba, Brazil. The research encompasses all living subphyla of arthropods (Crustacea, Chelicerata, Myriapoda and Hexapoda) represented by 705 specimens actively collected and tested through respirometry and measured by Infrared Gas Analyzer (IRGA). As a result, we observed that among the studied arthropods, Hexapoda and Chelicerata showed higher rates of carbon dioxide emission, while Crustacea and Myriapoda had the lowest rates. Regarding its relationship with body mass, Hexapoda and Crustacea showed higher respiration by specific mass and, in general, all Arthropoda corroborated the pattern described by animal physiology, where body mass and animal respiratory rate are inversely correlated.
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