Respiration of Rhyzopertha dominica (F.) at reduced oxygen concentrations
JOURNAL OF STORED PRODUCTS RESEARCH, vol.40, no.1, pp.27-38, 2004 (SCI-Expanded, Scopus)
- Publication Type: Article / Article
- Volume: 40 Issue: 1
- Publication Date: 2004
- Doi Number: 10.1016/s0022-474x(02)00076-0
- Journal Name: JOURNAL OF STORED PRODUCTS RESEARCH
- Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
- Page Numbers: pp.27-38
- Keywords: Rhyzopertha dominica, respiration, reduced oxygen, developmental stages, ENERGY BUDGET, COLEOPTERA, CUCUJIDAE, INSECTS
- Ankara University Affiliated: Yes
Abstract
Developmental stages of Rhyzopertha dominica were exposed to atmospheres containing 1%, 2%, 3%, 5%, 10% or 15% oxygen (O-2) in nitrogen at 30degreesC and 70% r.h. Respiration rates were determined with a gas chromatograph. The O-2 intake and carbon dioxide (CO2) output by insects were expressed in mul/insect h or mul/mg h. Respiration of eggs, young and old larvae, pupae, and adults at normal atmospheric air were at rates of 0.0029, 0.41, 2.52, 0.82, and 2.86 mul CO2/insect h, respectively. Respiration rates of the same stages in terms of insect weight were 0.14, 4.83, 1.98, 0.64 and, 2.58 mul CO2/mg h, respectively. At reduced O-2 levels respiration rates of eggs, larvae and pupae were proportional to the O-2 levels. Adult respiration rates were high at 3% and 5% 02 levels almost reaching that of normal atmospheric air, and were 2.56 and 2.85 mul CO2/insect h, respectively. In adults, respiration quotient values for the same O-2 levels were higher than at normal atmospheric O-2 and were 1.5 and 1.02, respectively.