Henry D. Prange

Ventilation and gas exchange during rest and exercise in adult green sea turtles

SummaryVentilation and metabolic rate were measured during exercise in adult female green turtles at Tortuguero, Costa Rica. Six turtles were studied at night on the beach while actively covering their nests. Five turtles, captured after nesting, were studied at rest, during 20 min of spontaneous activity, and during recovery from the activity. Arterial blood samples were obtained from the latter animals and analyzed for pH,

The effects of tracheal coiling on the vocalizations of cranes (Aves; Gruidae)

P_{CO_2 } , P_{O_2 }

CO2 and heat have different effects on directed ventilation behavior of grasshoppers Melanoplus differentialis

, O2 concentration and lactate concentration. Blood was obtained by heart puncture from 8 turtles immediately after nesting and analyzed for blood lactate. Active metabolism (

Humidity selection by thermoregulating grasshoppers

\dot V_{O_2 }

Effects of oxygen concentration and clutch on sex determination and physiology in red-eared slider turtles (Trachemys scripta)

) in both groups was almost 10 times the standard resting value (0.024 l/kg·h). The increase in ventilation during exercise, due exclusively to higher breathing frequency, exceeded the increase in