William A. deGraw

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Seasonal changes in several blood components (cholesterol, phospholipid phosphorus, glyceride glycerol, free fatty acids, and calcium), hematocrit, and body mass were studied in captive and free-living groups of White-crowned Sparrows (Zonotrichia leucophrys gambelii) over a 2-year period. Cholesterol, phospholipid phosphorus, and glyceride glycerol levels(More)
In captive Harris' sparrows (Zonotrichia querula), plasma and blood volume increased significantly during stages 2 and 3 of postnuptial molt, when extensive feather replacement was taking place in the wings, tail and body tracts. Erythrocyte number did not increase significantly until molt was essentially complete. Consequently the 6% mean maximum reduction(More)
Like most small mammals, Mongolian gerbils (Meriones unguiculatus) are born without the ability to maintain core body temperature (Tb). Breeding adults, juvenile alloparents, nest materials, and other litter mates probably contribute to the maintenance of core body temperature in neonates, but the relative role of each factor is unknown. We developed a(More)
The heart rate (HR) of a female Ferruginous Hawk was monitored continuously by telemetry under different handling-disturbance onditions. HR increased approximately threefold when the handler was outside the cage, and invariably reached a maximuin (490-502 beats/min) when the handler was inside the cage. Near-maximal HR's were observed when the Hawk was(More)
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