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Journal of Biological Sciences

Year: 2004 | Volume: 4 | Issue: 4 | Page No.: 564-567
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Research Article

Seasonal Variation in Basal Metabolic Rate and Body Composition Within Individual Sanderling Bird Calidris alba

Mansour I. AL-Mansour

ABSTRACT

The magnitude of the seasonal variations in basal metabolic rate and body composition within individual Sanderling were investigated. Basal metabolic rate (BMR), an individual bird`s minimum rate of energy expenditure, was followed in adult captive Sanderling throughout their annual cycle, in conjunction with measurements of body composition (lean mass and fat mass) as predicted using total body electrical conductivity (TOBEC). Adult captive Sanderling increased significantly in body mass (37%) during spring, primarily due to fat deposition (25%). A seasonal peak in BMR, often double the seasonal minimum, occurred during spring but typically took place several days (2-4) after the seasonal peaks in BM, lean mass (LM) and fat mass (FM). Little of the variation in BMR seen within captive Sanderling, irrespective of physiological state.
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