کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
2842822 1571094 2015 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Seasonal metabolic variation over two years in an Afrotropical passerine bird
ترجمه فارسی عنوان
تنوع متابولیک فصلی بیش از دو سال در یک پرنده آستروترپیک گذرین
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک علوم کشاورزی و بیولوژیک (عمومی)
چکیده انگلیسی


• Seasonal trends in metabolism of the Cape White-eyes were investigated.
• No seasonal difference in body mass between consecutive seasons was found.
• Lower critical limit of thermoneutrality was lower in winter (23 °C) than in summer (28 °C).
• Mean whole animal basal metabolic rate (BMR) varied between years and seasons.
• Conclude that seasonal trends in avian BMR may vary between years, within a population.

Seasonal trends in metabolic parameters are well established in avian populations from highly seasonal environments, however, seasonal trends in metabolism of birds from lower latitudes (and of Afrotropical birds in particular) are not well understood. We investigated seasonal trends in metabolism for a small (10–12 g) Afrotropical bird, the Cape White-eye (Zosterops virens), using flow-through respirometry in two summers and two winters. There was no seasonal difference in body mass between consecutive seasons. The lower critical limit of thermoneutrality was lower in winter (23 °C) than in summer (28 °C), as expected for a small Afrotropical bird. In the first year of the study, mean whole animal basal metabolic rate (BMR) of Cape White-eyes was significantly lower in winter than in summer, while in the second year of the study this trend was reversed, and in the middle two seasons there was no significant difference in BMR. Differences in mean temperature and mean rainfall between seasons could not account for the seasonal trends in BMR. We conclude that seasonal trends in avian BMR may vary between years, within a population.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Thermal Biology - Volume 52, August 2015, Pages 58–66
نویسندگان
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