Life-history dependent relationships between plasma alkaline phosphatase activity and body condition in male Eurasian Tree Sparrows

作     者：Yuliang Zhao Lingjuan Gong Baohua Zhao Xuebin Gao Yuefeng Wu Dongming Li 

作者机构：Key Laboratory of Animal Physiology Biochemistry and Molecular Biology of Hebei Province College of Life Sciences Hebei Normal University Shaanxi Institute of Zoology 

出 版 物：《Avian Research》 (鸟类学研究（英文版）)

年 卷 期：2017年第8卷第3期

页      面：163-167页

核心收录：

学科分类：07[理学] 0713[理学-生态学] 

基　　金：supported by the National Natural Science Foundation of China (Grant Nos. 31672292, 31372201) the Natural Science Foundation of Hebei Province (C2017205059) 

主　　题：Alkaline phosphatase Size-corrected mass Hematocrit Passer montanus Life history Trade-off 

摘      要：Background: In temperate-breeding birds, individuals must adjust their physiological states from one life-history stage to another in response to changing conditions to maximize ecological fitness. Previous evidences have shown that body mass, size-corrected mass(SCM), and hematocrit(Hct) could be used as estimates of the energetic state of individuals to illustrate life-history trade-offs and individual quality in field physiology. Plasma alkaline phosphatase(ALP) plays critical roles in regulating the metabolism of energy but very limited information is known on its link with body mass or ***: We determined the changes of plasma ALP levels in both early breeding and wintering stages of male Eurasian Tree Sparrows(Passer montanus), and examined the relationships between ALP and body mass, SCM, and Hct of the ***: Our study showed that(1) in male Eurasian Tree Sparrows, body mass did not vary with life-history stage but plasma ALP activity significantly increased in the wintering stage compared to the breeding stage;(2) ALP activity was not correlated with individual body mass but was positively correlated with individual SCM and Hct. Such positive correlations, however, only occurred in the wintering but not in the breeding ***: Our results suggest that plasma ALP activities in free-living birds can be used as one of the indicators o body condition or nutritional status for analyzing individual variation in the wintering but not in the breeding stages. The life-history dependent relationships between plasma ALP activity and body condition may contribute to our better understanding of the trade-off between individual survival and reproduction in free-living animals.