Body Condition and Fuel Deposition Patterns of Calidrid Sandpipers During Migratory Stopover

[摘要] WecomparedseasonalvariationsinbodyconditionandfueldepositionpatternsoffivecalidridsandpipersatChongmingDongtan(easternChina),astopoversiteintheEastAsian—AustralasianFlyway.Wetestedthehypothesisthatlong-distancemigrantsshowdifferentbodyconditionandfueldepositionpatternsrelativetothoseundertakingshort-distanceflights.Resultsindicatedthatthebodyconditionandfueldepositionpatternsofthesandpipersvariedbetweenthenorthwardandsouthwardmigrationseasonsandbetweenage-classes.GreatKnotsCalidristenuirostrisandRedKnotsCalidriscanutusmigratesouthwardsonalong-distancenonstopflightfromChongmingDongtantonorthwestAustralia,whilecoveringonthereturnflightarelativelyshort-distancebetweenChongmingDongtanandthenorthYellowSearegion.BothspeciesattainedasignificantlyhigherbodyconditionatChongmingDongtanduringthesouthwardthannorthwardmigration.Moreover,theyshowedasignificantincreaseinbodyconditionatChongmingDongtanduringnorthwardmigrationstopover,whichweseeasarecoveryfromthelongflightfromAustralia.Incontrast,Red-neckedStintsCalidrisruficollisandLong-toedStintsCalidrissubminuta,employingseriesofrelativelyshort-distanceflightsduringmigration,indicatednosignificantdifferenceindeparturebodyconditionatChongmingDongtanbetweenseasons,norsignificantincreaseinbodyconditionduringeithermigrationstopover.DunlinsCalidrisalpinaontheotherhand,showedasignificantlyhigherbodyconditionduringnorthwardthansouthwardmigrationstopover,mostlikelyinanticipationofthelongertravellingdistanceafterleavingChongmingDongtanduringnorthwardmigration.Thisstudyconfirmsthatthebodyconditionandfueldepositionpatternsamongshorebirdspeciesthatundertakelong-distancenonstopflightsaredifferentfromthosethatundertakeseriesofshort-distanceflights,suggestingthatthecomparisonofbodyconditionandfueldepositionpatternsofcalidridsandpiperscanbeanimportanttooltounderstandtheirmigrationstrategies.

[学科分类] 动物科学

[关键词] East Asian—australasian Flyway