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Accueil du site → Master → Etats Unis → 1966 → Water balance and thermoneutrality in the grasshopper mouse (Onychomys leucogaster)

New Mexico State University (1966)

Water balance and thermoneutrality in the grasshopper mouse (Onychomys leucogaster)

Conley MIJ.

Titre : Water balance and thermoneutrality in the grasshopper mouse (Onychomys leucogaster)

Auteur : Conley MIJ.

Université de soutenance : New Mexico State University

Grade : Master of Science (MS) 1966

Résumé
Water balance and thermoneutrality were studied in the grasshopper mouse Onychomys leucogaster. The thermoneutral zone included ambient temperatures ranging from 28 degrees C - 35 degrees C. The upper critical temperature was near 37 degrees C. The mean minimum rate of matabolism was 1.582cc 02/gm./hr. at 10 degrees C. The minimum value of evaporative water loss wa 13 mg. H2O/gm./hr. at 25 degrees C ; the mean maximum value was 41.7 mg./gm./hr. at 37 degrees C....Under conditions of total deprivation of water, grasshopper mice maintained weight on a beef liver diet, but weight losses occured on a ground beef diet. The mice lost 12.5% of their body weight when fed ground beef and stabilized at this point. Behavioral adaptations are probably of greater importance than physiological ones in permitting the grasshopper mice to inhabit the desert.

Mots Clés : Onychomys, physiology, rodent, grasshopper mouse

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