Sequential vigilance is unpredictable in reproductive Black-necked Cranes

作     者：Yuhang Li Le Yang Yunchao Luo Yiqian Wu Zhongqiu Li 

作者机构：School of Life SciencesNanjing University Tibet Plateau Institute of Biology 

出 版 物：《Avian Research》 (鸟类学研究（英文版）)

年 卷 期：2019年第10卷第1期

页      面：82-88页

核心收录：

学科分类：0710[理学-生物学] 07[理学] 09[农学] 

基　　金：financially supported by the National Natural Science Foundation of China(Nos.31360141,31772470,and No.J1103512) the West Light Foundation of Chinese Academy of Sciences(2015) the Project of National Biodiversity Observation Network-Bird(2015-2018) 

主　　题：Black-necked Cranes Instantaneous randomness Sequential randomness 

摘      要：Background:Vigilance refers to the behavior of animals scanning their surroundings with a main purpose of *** vigilance can serve the function of anti-predation depends on its unpredictability,meaning instantaneous randomness,sequential randomness,and independence,the three assumptions from Pulliam model(J Theor Biol 38:419,1973).Here we tested two of these three assumptions in reproductive Black-necked Cranes(Grus nigricollis) in Tibetan Plateau:instantaneous randomness and sequential ***:Observations were carried out in July and September of 2014,July and August in 2017 in Selincuo National Nature Reserve,Tibet,with the help of focal sampling *** instantaneous randomness,we used Kolmogorov–Smirnov test for its negative exponential distribution;for sequential randomness,we used Run test,correlation analysis,and generalized linear model to see if an inter-scan and its previous scan were ***:Not similar to some recent studies,we did not find a significant predictable vigilance in this *** inter-scan intervals(86/100,86.0%) passed negative exponential distribution test,meaning vigilance sequences with instantaneous randomness;most inter-scan intervals(91/100,91.0%) passed sequential random test,showing vigilance sequences were random ***:Our results suggest that keeping a vigilance pattern with unpredictability is beneficial to the survival of the Black-necked Cranes,which are facing with both cruel natural environments and high predation risks.