文献类型：期刊文献

英文题名：Extrinsic factors, endocrine mechanisms, and behavioral indicators of migratory restlessness in wintering whooper swans (Cygnus cygnus)

作者：Yang, Liangliang[1] Wang, Wenxia[2] Sun, Ping[3] Huang, Songlin[1] Gao, Ruyi[4] Kong, Desheng[4] Ru, Wendong[4] Wronski, Torsten[5] Zhang, Guogang[1]

通信作者：Zhang, GG[1];Wronski, T[2]

机构：[1]Chinese Acad Forestry, Key Lab Forest Protect Natl Forestry & Grassland, Res Inst Forest Ecol Environm & Protect, Beijing 100091, Peoples R China;[2]Chinese Acad Forestry, Res Inst Forestry Policy & Informat, Beijing 100091, Peoples R China;[3]Eberswalde Univ Sustainable Dev, Fac Forest & Environm, D-16225 Eberswalde, Germany;[4]Natl Urban Wetland Pk Adm, Sanmenxia, Henan, Peoples R China;[5]Liverpool John Moores Univ, Sch Biol & Environm Sci, Fac Sci, Liverpool L3 3AF, Merseyside, England

年份：2021

卷号：11

期号：1

外文期刊名：SCIENTIFIC REPORTS

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000665142100004)】；

基金：The authors would like to thank the National Urban Wetland Park Administration in Sanmenxia city for their support of collecting experimental samples and behavior observation. The research was funded by National Natural Science Foundation of China (no. 31600323), Basic Research Business Special Project of Chinese Academy of Forestry (no. CAFYBB2016SY019) and Forecast of avian influenza along Whooper Swan migration routes of National Forestry and Grassland Administration (no. 2130211-20-104).

语种：英文

摘要：Extrinsic factors, endocrine mechanisms, and behavioral indicators of migratory restlessness were studied in wintering whooper swans (Cygnus cygnus) in the Sanmenxia Swan National Wetland Park in western Henan Province, central China. First, the fecal glucocorticoid metabolite (FGM) concentration was established and related to mean air temperature or photo period (day length) using simple linear or non-linear regression models. After a model selection procedure, the best fitted model revealed that an increase of FGM concentration was associated with an increase in the squared mean air temperature (R-2=0.88). Other models showed an increasing FGM concentration to correspond with increasing values of day length, squared day length, and mean air temperature-however without statistical support. In a second step, behavioral frequencies of seven behaviors were condensed into three behavioral principal components (PCs) using principal components analysis. Behavioral PCs largely corresponded to three activity phases described for wintering whooper swans in central China and were correlated with the FGM concentration using Spearman's rank-order correlations. Results revealed a significant correlation between FGM and behavioral PC2 (positive factor loadings from vigilance and preening, negative loading from foraging). Finally, we tested for an effect of behavioral PCs on changes in winter home range size using a set of multiple linear regression models. Results of averaged model parameter estimates showed only the behavioral PC3 (positive factor loadings from fighting and calling, negative loading from locomotion) had a marginal significant effect on home range size. Results confirmed findings of previous studies on migratory restlessness in whooper swans. However, due to the small sample size (N=15 weeks) the effect of PC3 on home range size was weak and should be viewed with caution.