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Issue:ISSN 1000-7083
          CN 51-1193/Q
Director:Sichuan Association for Science and Technology
Sponsored by:Sichuan Society of Zoologists; Chengdu Giant Panda Breeding Research Foundation; Sichuan Association of Wildlife Conservation; Sichuan University
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Your Position :Home->Past Journals Catalog->2010 Vol.29 No.3

Phenotypic Flexibility of Metabolic Rate and Organ Masses in Tree Sparrows Passer montanus in Temperature Acclimation
Author of the article:YANG Zhi-hong1, SHAO Shu-li1, LIU Jin-song2*
Author's Workplace:(1. College of Life Science and Engineering, Qiqihaer University, Qiqihaer, Heilongjiang Province 161006, China;2. School of Life and Environmental Sciences, Wenzhou University, Wenzhou, Zhejiang Province 325027, China)
Key Words:Passer montanus; basal metabolic rate (BMR); organ mass; temperature acclimation
Abstract:To explore the phenotypic plasticity of metabolic organs and metabolism in tree sparrows under different temperatures, adult tree sparrows were divided into 2 groups: an experimental group raised under a temperature of 5℃ and a control group raised under a temperature of 25℃ All animals had been domesticated for 4 weeks in an artificial climate box with a photoperiod of 12L:12D prior to the start of the experiment. We recorded following data: body weight, basal metabolic rate (BMR), body fat, body water, weights of dry organs and tissues, weights of wet organs and tissues. Results: sparrows in the experimental group were affected by the low temperature domestication, and their BMR increased markedly while there were no significant changes in body fat, body water, and body weight; both the weight of fresh liver and the weight of fresh kidney increased markedly, whereas the weight of dry kidney increased slightly. The weight of the total dry digestive tube, small intestine and rectum decreased remarkably (P<0.01). The weight of fresh stomach increased remarkably (P<0.05). Additionally, the results showed that the increase in total energy consumption of organs was likely to lead to an increase of BMR, and ambient temperature change was able to induce adaptive change of sparrow organs in structure and function. Energy capacity and function of organs, food intake and digestibility, are the result of the energy budget of an individual sparrow’s fitness and environmental factors.
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