کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1974083 1060336 2007 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Hibernation and daily torpor in an armadillo, the pichi (Zaedyus pichiy)
موضوعات مرتبط
علوم زیستی و بیوفناوری بیوشیمی، ژنتیک و زیست شناسی مولکولی زیست شیمی
پیش نمایش صفحه اول مقاله
Hibernation and daily torpor in an armadillo, the pichi (Zaedyus pichiy)
چکیده انگلیسی

Hibernation and daily torpor are physiological strategies to cope with energetic challenges that occur in many mammalian and avian taxa, but no reliable information exists about daily torpor or hibernation for any xenarthran. Our objective was to determine whether the pichi (Zaedyus pichiy), a small armadillo (Xenarthra, Dasypodidae) that inhabits arid and semi-arid habitats in central and southern Argentina and Chile, enters shallow daily torpor or prolonged deep hibernation during winter when environmental temperature and food availability are low. We studied body temperature changes during winter in semi-captive pichis by means of temperature dataloggers implanted subcutaneously. All individuals entered hibernation, characterized by torpor events of 75 ± 20 h during which the subcutaneous temperature (Tsc) decreased to 14.6 ± 2.1 °C. These events were interrupted by periods of euthermia of 44 ± 38 h with a Tsc of 29.1 ± 0.7 °C. After the hibernation season, daily torpor bouts of 4 to 6 h occurred irregularly, with Tsc dropping to as low as 24.5 °C. We conclude that the pichi is a true hibernator and can enter daily torpor outside of the hibernation season.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Comparative Biochemistry and Physiology Part A: Molecular & Integrative Physiology - Volume 148, Issue 4, December 2007, Pages 893–898
نویسندگان
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