HOESE, W.J.*; WALKER, S.E.; Calif. State Univ. Fullerton: Assessing College Students� Understanding of Insect Diversity Students enter college with non-scientific conceptions about biology. Widespread misconceptions have been identified in students of diverse ages, backgrounds, and experiences. Many of these misconceptions remain resistant to change and frequently continue intact throughout college and beyond. Often these misconceptions […]

LIGHTON, J.R.B.; Univ. of Nevada, Las Vegas: The discontinuous gas exchange cycle in tracheate arthropods: Overview, status and controversies. The discontinuous gas exchange cycle or DGC decouples O2 uptake and CO2 emission in tracheate arthropods, including many insects as well as argasid and ixodid acarines, sulphugids and scolopendromorph chilopods. Partial pressures gradients of O2 across […]

LEASE, Hilary M.; WOLF, Blair O.; HARRISON, Jon F.; Univ. of New Mexico; Univ. of New Mexico; Arizona State Univ.: Ontogeny of Tracheal Volume in Schistocerca americana Respiratory systems play a critical intermediary role in the delivery of oxygen from the atmosphere to the cell. Morphological and functional characteristics of respiratory systems thus are often […]

BRADLEY, T.J.; Univ. of California, Irvine: Discontinuous Gas Exchange in Insects Serves to Keep Oxygen Out The respiratory system of insects is composed of a branching system of cuticle-lined tracheae. At the external openings of the tracheal system, spiracular valves control the degree of gas exchange between the tracheal lumina and the external atmosphere. Many […]

WOODS JR, W. A.*; WOOD, C. A. L. ; STEVENSON, R. D. ; University of Massachusetts Boston; Lincoln, MA; University of Massachusetts Boston: Detecting Interindividual Variation in Resting Metabolic Rate of the Painted Lady Butterfly Vanessa Cardui: Why You Should Not Offer Ladies Lunch Questions about the adaptive significance of metabolic rate can be approached […]

RASCON, B*; HARRISON, JF; Arizona State University; Arizona State University: Atmospheric oxygen effects on metabolic rate and behavior of tethered flying locusts Insects are known to exhibit a high tolerance to hypoxia. Prior studies have shown that the critical atmospheric PO2 (Pc) for carbon dioxide emission for resting grasshoppers is less than 5 kPa, which […]

ULRICH, Paul N.*; MARSH, Adam G.; University of Delaware; University of Delaware: Tissue-specific differences and interindividual variation of malate dehydrogenase activity and protein content in the oyster Crassostrea virginica Malate dehydrogenases (MDH, mitochondrial and cytosolic) are integral to bivalve metabolism with particular importance during anaerobiosis. We found that the specific activities of heart and phasic […]

DUONG, C.A.*; DICKSON, K.A.; California State University Fullerton: The contribution of mitochondrial proton leak as a heat source in lamnid sharks Endothermic fishes can elevate the temperature of certain tissues above ambient temperature because the tissues are served by counter-current heat exchangers that conserve metabolic heat. In lamnid sharks, warming of the locomotor musculature, visceral […]

COVI, J.A.*; HAND, S.C.; Louisiana State University; Louisiana State University: Physiological effects of V-ATPase inhibition on whole embryos of the brine shrimp, Artemia franciscana Upon exposure to anoxia, encysted embryos of the brine shrimp, Artemia franciscana, enter a potentially ametabolic state, the transition into which is facilitated in large part by an intracellular acidification exceeding […]

HOUSER, Dorian S.; CHAMPAGNE, Cory; CROCKER, Daniel E.; Sonoma State University; Sonoma State University; Sonoma State University: Glycerol gluconeogenesis in simultaneously fasting and lactating northern elephant seals Female elephant seals (Mirounga angustirostris) fast while lactating creating a metabolic conflict between energy-demanding and energy-conserving physiological mechanisms. During the ~4 week lactation period, ~90% of energy needs […]