Using accelerometry to compare costs of extended migration in an arctic herbivore  

作　　者：Mitch D. WEEGMAN Stuart BEARHOP Geoff M. HILTON Alyn J. WALSH Larry GRIFFIN Yehezkel S. RESHEFF Ran NATHAN Anthony DAVID Fox 

机构地区：[1]Centre for Ecology and Conservation, College of Life and Environmental Sciences, University of Exeter, Cornwall Campus, Penryn TR109EZ, UK [2]Wildfowl & Wetlands Trust, Slimbridge, Gloucester GL2 7BT, UK [3]National Parks and Wildlife Service, Wexford Wildfowl Reserve, North Slob, Wexford, Ireland [4]Wildfowl & Wetlands Trust, Caerlaverock Wetland Centre, Eastpark Farm, Caerlaverock, Durnfriesshire DG1 4RS, UK [5]Department of Ecology, Evolution and Behavior, The Hebrew University of Jerusalem, Givat Ram, Jerusalem 91904, Israel [6]Department of Bioscience, Aarhus University, Kale, Grenavej 14, RФnde DK-8410, Denmark [7]Present address: School of Natural Resources, University of Missouri, Columbia, MO 65211, USA.

出　　处：《Current Zoology》2017年第6期667-674,共8页动物学报（英文版）

摘　　要：Understanding how individuals manage costs during the migration period is challenging because individuals are difficult to follow between sites; the advent of hybrid Global Positioning Systemacceleration （ACC） tracking devices enables researchers to link spatial and temporal attributes of avian migration with behavior for the first time ever. We fitted these devices on male Greenland white-fronted geese Anser albifrons flavirostris wintering at 2 sites （Loch Ken, Scotland and Wexford, Ireland） to understand whether birds migrating further during spring fed more on winter- ing and staging areas in advance of migration episodes. Although Irish birds flew significantly further （ca. 300 kin） than Scottish birds during spring, their cumulative hours of migratory flight, flight speed during migration, and overall dynamic body ACC （i.e., a proxy for energy expenditure） were not significantly different. Further, Irish birds did not feed significantly more or expend significantly more energy in advance of migration episodes. These results suggest broad individual plasticity in this species, although Scottish birds arriving on breeding areas in Greenland with greater energy stores （because they migrated less） may be better prepared for food scarcity, which might increase their reproductive success.

关 键 词：avian migration cost energy expenditure global positioning system-acceleration tracking devices Greenland whitefronted geese individual decision-making proportion of time feeding. 

分 类 号：Q1[生物学—普通生物学]