کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1974341 | 1060350 | 2007 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Oxygen consumption and thermoregulatory responses in three species of South American marsupials
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کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری
بیوشیمی، ژنتیک و زیست شناسی مولکولی
زیست شیمی
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چکیده انگلیسی
Oxygen consumption (VO2), body temperature (Tb) and wet thermal conductance (Cwet), under resting conditions, exposure to low ambient temperature (Ta) and during sustained exercise (treadmill running) were measured in three phylogenetic related (same family; Didelphidae) South American marsupials possessing similar body masses: Caluromys philander (arboreal/fruit and insect eating), Philander opossum (terrestrial and arboreal/omnivore), and Metachirus nudicaudatus (terrestrial/omnivore). Our measurements of VO2 and Cwet under resting conditions agree with those previously reported for other marsupials. We expected that C. philander would show a lower maximal sustained VO2, compared to the other two species, based on its more reduced skeletal muscle mass. However, the values obtained for C. philander were not statistically different (ANOVA) from those obtained for the other two species. When exposed to low ambient temperature (12 °C), differences among the three species were detected, i.e., M. nudicaudatus did not survive, while the other two species were able to reduce their Tb under such conditions. C. philander gradually decreases its Tb when cold exposed, and P. opossum shows a more pronounced Tb drop only when exposure to low ambient temperatures occurs for a more prolonged period of time.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Comparative Biochemistry and Physiology Part A: Molecular & Integrative Physiology - Volume 147, Issue 3, July 2007, Pages 658-664
Journal: Comparative Biochemistry and Physiology Part A: Molecular & Integrative Physiology - Volume 147, Issue 3, July 2007, Pages 658-664
نویسندگان
Marcel Cintra Pereira Ribeiro, José Eduardo Pereira Wilken Bicudo,