COOPER, S.J.*; BLEWETT, L.: Ventilatory Oxygen Extraction in Relation to Ambient Temperature in Black-capped Chickadees We examined the effects of ambient temperature (Ta) on metabolism (VO2) and ventilation in winter-acclimatized black-capped chickadees. We wanted to determine the relationships between VO2 and respiratory frequency (f), tidal volume (VT), and ventilatory oxygen extraction (EO2). In addition, we […]

COVI, J.A.*; HAND, S.C.: Vacuolar proton-ATPase subunit B mRNA expression in Artemia franciscana gastrulae. Exposure of A. franciscana gastrulae to anoxia induces a profound metabolic and developmental depression known as quiescence. This fully reversible transition is characterized by an extraordinary intracellular acidification. However, a significant proportion of the protons required for this event are of […]

PIERCE, V.A.*; ELGHANDOUR, R.S.; JARROUGE, E.G.; MARCINKIEWICZ, A.: Using laboratory populations of D. melanogaster to study adaptation of metabolic pathways. We are systematically investigating competing models of metabolic regulation with respect to temperature acclimation and adaptation. We propose two hypotheses: (1) the enzyme(s) in a pathway that show the greatest thermal sensitivity will be the […]

BENNETT, M.T.*; RODNICK, K.J.: Use of heparin in cannulation studies of rainbow trout (Oncorhyncus mykiss) affects energy substrates in plasma. Heparin has been used universally to maintain patency during cannulation of fish in metabolic studies. In mammals heparin is an anticoagulant and releases lipoprotein lipase (LPL) from the capillary endothelium, promoting hydrolysis of plasma triglycerides […]

HUFF, Stephanie; LIPSCOMB, Diana: The Phylogenetic Position of Karyorelictid Ciliates (Phylum Ciliophora) Karyorelictid ciliates are very common in marine littoral sands. Like all ciliates, they have two kinds of nuclei (a macronucleus for most protein transcription and micronucleus which functions in genetic transmission), rows of cilia with a distinctive infraciliature (transverse and postciliary microtubules and […]

ORTIZ, S.D.*; DIAMOND, J.: The Ontogeny of Metabolic Rate in Two Species of Peromyscus Mice. Two congeneric North American mice, Peromyscus eremicus of southwestern deserts and P. leucopus of southeastern woodlands, are good models for investigating the adaptive significance of species variation because of the ecological differences between their habitats. Little is known about the […]

ALBRIGHT, G.; SUMIDA, S.S.; DODICK, J.: The Basal Reptilian Family Captorhinidae and Basal Amniote Interrelationships Phylogenetic analyses during the past two decades have shown the Late Paleozoic Captorhinidae to be amongst the most basal of eureptilians. A re-analysis of the intrafamilial relationships of the Captorhinidae is combined with: (1) phylogenetic analyses of the Diadectomorpha, acknowledged […]

TEMPLE, J.G.*; LOESSER, K.E.: Student Perceptions of Inquiry-Based and Traditional Laboratory Exercises in an Undergraduate Physiology Course There is currently a movement in undergraduate biology education to employ inquiry-based (IB) exercises in which students are allowed to design their own experiments in the laboratory. This approach differs from the traditional approach in which students are […]

TULLIS, A; MOON, B.R.: Size Dependence of Rattling Performance and Enzyme Activities of Rattlesnake Shaker Muscle The tailshaker muscle of western diamondback rattlesnakes (Crotalus atrox) can sustain contractions up to 100 Hz for minutes to hours. Shaker muscle fibers have high densities of mitochondria, capillaries, and glycogen. They are high in both aerobic and anaerobic […]

CULLEN, M. F.*; HARRINGTON, S. T.; KAUFMANN, R. S. ; LOWERY, M. S.: Seasonal Changes in Physiological Status of Antarctic Krill, Euphausia superba, from Deception Island, Antarctica Seasonal changes in biochemical indicators of physiological status were analyzed in abdominal muscle of the Antarctic krill, Euphausia superba, collected from Port Foster, Deception Island, in the South […]