... 2 consumption is calculated from electrolytic charge transfer. The effects of developmental stage, body mass and temperature on O 2 consumption of Tenebrio molitor beetles were easily measured by the apparatus. This straightforward design is a significant innovation in that it provides continuous...

... circadian cycles, each consisting of a less-responsive and more-responsive period, in a circabidian oscillation, and the circabidian rhythm is driven by the circadian clock. A mark–recapture study showed that beetles repeatedly appeared on the same tree approximately every 2 days. However, the periodicity...

...Roger S. Seymour; Craig R. White; Marc Gibernau SUMMARY Cyclocephala colasi beetles are facultative endotherms that spend most of their adult lives inside the inflorescences of Philodendron solimoesense , where ambient temperature ( T a ) averages about 28°C due to floral thermogenesis...

... compressions are associated with excurrent gas exchange in the ground beetle Pterostichus stygicus , we used flow-through respirometry and synchrotron x-ray phase-contrast imaging to simultaneously record CO 2 emission and observe morphological changes in the major tracheae. Each observed tracheal compression...

...T. Eimüller; P. Guttmann; S. N. Gorb SUMMARY For the first time, the terminal elements (spatulae) of setal (hairy)attachment devices of the beetle Gastrophysa viridula (Coleoptera,Chrysomelidae) and the fly Lucilia caesar (Diptera, Calliphoridae)were studied using transmission X-ray microscopy...

...Valerie A. Bennett; Todd Sformo; Kent Walters; Oivind Toien; Kennan Jeannet; Ronald Hochstrasser; Qingfeng Pan; Anthony S. Serianni; Brian M. Barnes; John G. Duman SUMMARY The beetle Cucujus clavipes is found in North America over a broad latitudinal range from North Carolina (latitude ∼35°N...

...Marcus J. Byrne; Frances D. Duncan SUMMARY The role of the subelytral cavity in flightless beetle species as an adaptation to water saving in arid habitats is still in dispute. We found that relatively little CO 2 was released from the subelytral cavity of a large apterous beetle Circellium bacchus...

... (RMR, measured as the rate of CO 2 emission; ) and several components of the DGC to examine accommodation to both temperature-induced changes and individual variation in RMR in two wood-boring beetles ( Phorocantha recurva and P. semipunctata ; Coleoptera: Cerambycidae). At low to moderate ambient...

...Robert K. Josephson; Jean G. Malamud; Darrell R. Stokes ABSTRACT The basalar muscle of the beetle Cotinus mutabilis is a large, fibrillar flight muscle composed of approximately 90 fibers. The paired basalars together make up approximately one-third of the mass of the power muscles of flight...

... be the default state of a system regulated by two interacting feedback loops when demands are absent. * e-mail: [email protected] 25 10 1999 22 12 1999 © 2000 by Company of Biologists 2000 discontinuous gas exchange ventilation water loss hypoxia beetle CO 2...

.... In general, the magnitude of the thermal hysteresis depends upon the specific activity and concentration of the AFP. This study describes several low-molecular-mass solutes that enhance the thermal hysteresis activity of an AFP from overwintering larvae of the beetle Dendroides canadensis . The most active...

... mechanisms experimentally. This study documents seasonally variable inoculative freezing resistance in Dendroides canadensis beetle larvae and combines immunofluorescence, in vivo removal of epicuticular lipids and in vitro chamber studies to explore the roles of seasonal modification in the cuticle...

...Andrew R. Parker; David R. Mckenzie; Maryanne C. J. Large ABSTRACT The light reflectors in the beetles Calloodes grayanus and Anoplognathus parvulus are examined. Contrasting multilayer reflectors are revealed. Calloodes grayanus appears a weak green colour, matching its background leaves, while...

...T. G. Forrest; M. P. Read; H. E. Farris; R. R. Hoy ABSTRACT We describe the paired hearing organ of the scarab beetle Euetheola humilis . The auditory structures of the beetle are typical of other insect ears in that they have a thinned tympanic membrane backed by a tracheal airsac with associated...

...Karl Erik Zachariassen; Sigrun Einarson ABSTRACT Tenebrionid beetles are an important element of the fauna on the African dry savanna. In contrast to the majority of savanna insect groups, which spend the dry season as larvae, the tenebrionids pass the dry season as adults. The adult tenebrionids...