... parameters are mainly reducible to red blood cell size (mean corpuscular volume, MCV). Past studies testing for correlation between MCV and body mass have given contradictory results. Using phylogenetically informed regressions, here I demonstrate that the correlation between MCV and body mass is indirect...

... thresher shark ( Alopias superciliosus ), diurnal movements above and below the thermocline subject the tissues, including the blood, to a wide range of operating temperatures. Therefore, blood–O 2 transport must occur across internal temperature gradients in regionally endothermic species, and over...

...Phillip R. Morrison; Diego Bernal; Chugey A. Sepulveda; Nicholas C. Wegner; Colin J. Brauner ABSTRACT Smalleye Pacific opah and swordfish can conserve metabolic heat and maintain specific body regions warmer than ambient water temperature (i.e. regional heterothermy). Consequently, blood O 2 uptake...

...Naim M. Bautista; Hans Malte; Chandrasekhar Natarajan; Tobias Wang; Jay F. Storz; Angela Fago ABSTRACT Crocodilians are unique among vertebrates in that their hemoglobin (Hb) O 2 binding is allosterically regulated by bicarbonate, which forms in red blood cells upon hydration of CO 2 . Although...

...-conserving mechanisms that support diving are underdeveloped at birth in pinnipeds and cetaceans. This Review explores how underdeveloped physiology makes immature marine mammals vulnerable to disturbance. Acidosis Blood Bradycardia Cetacean Dive response Heart rate Hypercarbia Hypoxia...

...Agnieszka Jendroszek; Hans Malte; Cathrine B. Overgaard; Kristian Beedholm; Chandrasekhar Natarajan; Roy E. Weber; Jay F. Storz; Angela Fago ABSTRACT The high blood–O 2 affinity of the bar-headed goose ( Anser indicus ) is an integral component of the biochemical and physiological adaptations...

... the extent to which blood and muscle oxygen stores varied as a function of age, body size and sex in the sexually dimorphic California sea lion, Zalophus californianus . We measured total body oxygen stores, including hematocrit, hemoglobin, MCHC, plasma volume, blood volume and muscle myoglobin in pups...

.... In contrast, in the bats switched to the amaranth diet, carbon half-life(39.7±3.4 days) was longer than that of nitrogen (25.0±6.0 days). The enrichment in 15 N between diet and blood was higher when bats were fed the amaranth diet (4.4±0.2‰) than when they were fed the soya diet (3.3±0.2‰). Similarly, bats...

... excretion in both species and a variety of physiological parameters in both muscle (e.g. lactate, glycogen, pyruvate, glucose and phosphocreatine concentrations) and blood (e.g. osmolality and lactate concentration) in juvenile shortnose sturgeon following 5 min of exhaustive exercise. In both species...

...M. Maffia; A. Rizzello; R. Acierno; M. Rollo; R. Chiloiro; C. Storelli SUMMARY Carbonic anhydrase (CA) activity was measured in blood, intestine, kidney and gill of two Antarctic teleosts, the haemoglobinless Chionodraco hamatus and the red-blooded Trematomus bernacchii , and of the temperate...

... morphological, physiological and biochemical properties were initiated and refined to enhance the uptake, transfer and utilization of oxygen for high aerobic capacities. In bats, exquisite pulmonary structural parameters were combined with optimal haematological ones: a thin blood–gas barrier, a large pulmonary...

...Erich K. Stabenau; Thomas A. Heming ABSTRACT Turtles possess a significant postcapillary CO 2 partial pressure disequilibrium between arterial blood and alveolar gas. There are several possible explanations for this blood disequilibrium including a slow rate of erythrocyte physiological anion shift...

...B. Bagatto; R. P. Henry ABSTRACT The dynamics of bimodal respiration, diving behaviour and blood acid–base status in the softshell turtle Trachemys scripta and the pond slider Apalone ferox were investigated at rest and under conditions of stress induced by exercise and forced submergence. During...

...B. L. Tufts; S. Currie; J. D. Kieffer ABSTRACT In vivo experiments were carried out to determine the relative effects of carbonic anhydrase (CA) infusion or inhibition on carbon dioxide (CO 2 ) transport and acid–base status in the arterial and venous blood of sea lampreys recovering from...

... − and ) and metabolite (e.g. lactate, phosphocreatine, ATP and glycogen) content, and the acid–base status and lactate concentrations in the blood, were measured at rest and during recovery from burst exercise in rainbow trout acclimated to either 5 or 18°C. Trout acclimated to the warmer temperature had higher resting...

...Richard W. Brill; David R. Jones ABSTRACT The high cardiac output, arterial blood pressure and cardiac energy demand of tuna make it likely that blood viscosity has an important influence on cardiovascular function. Furthermore, tuna regularly subject themselves to ambient temperature changes of 10...

... that of adult erythrocytes. Hatchling erythrocyte mean cell volume is approximately half of the adult value, but hematocrit, blood hemoglobin concentration and blood viscosity of hatchlings and adults are similar. Oxygen-carrying capacity in green turtles, unlike that of other diving vertebrates, corresponds...

...R. A. Ferguson; N. Sehdev; B. Bagatto; B. L. Tufts ABSTRACT In vitro experiments were carried out to examine the interactions between oxygen and carbon dioxide transport in the blood of the sea lamprey. Oxygen dissociation curves for whole blood obtained from quiescent lampreys had Hill numbers ( N...

...B. L. Tufts; B. Bagatto; B. Cameron ABSTRACT Exercise in sea lampreys resulted in a significant decrease in the extracellular pH (pHe) in both arterial and venous blood. At rest, the erythrocyte pH (pHi) of venous blood was significantly greater than the pHi of arterial blood. Despite...

... affinity of maternal blood. These data indicate that pregnancy may result in an enhanced ability of adult blood to deliver oxygen to the fetus. Since the binding of organic phosphates and oxygen to hemoglobin is sensitive to temperature, and since these animals experience diurnal changes in temperature, we...