Comparison of Respiration in AdultHarmonia axyridisPallas andHippodamia convergensGuerrin-Manaville (Coleoptera: Coccinellidae)
| Autor: | Lee D. Hansen, G. M. Booth, E. B. Acar, D. D. Mill, Bruce N. Smith |
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| Rok vydání: | 2005 |
| Předmět: | |
| Zdroj: | Environmental Entomology. 34:241-245 |
| ISSN: | 1938-2936 0046-225X |
| Popis: | Specific metabolic heat rates (Rq) and respiration rates (RCO2) of adult Harmonia axyridis Pallas, the multicolored Asian lady beetle, and Hippodamia convergens Guerrin-Manaville, the convergent lady beetle, were measured in isothermal calorimeters at 5°C intervals from 0 to 40°C. Anabolic rates and Rq/RCO2 ratios were calculated as functions of temperature from the calorespirometric data. The two species have similar heat and CO2 rates from 0 to 10°C, but both rates are higher for H. convergens at all other temperatures. Anabolic rates and Rq/RCO2 ratios indicated high-temperature stress in H. convergens at 40°C and at 35 and 40°C in H. axyridis. Anabolic rates and Rq/RCO2 ratios for the two species differed markedly from 15 to 30°C, where H. convergens had a higher anabolic rate and lower Rq/RCO2 ratio (i.e., greater metabolic efficiency) than H. axyridis. The data show that H. axyridis maximizes the anabolic rate, and therefore the biosynthesis rate, at low temperatures around 5°C and maximize... |
| Databáze: | OpenAIRE |
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