Sex Identification of Jack Snipe Lymnocryptes minimus by Discriminant Analysis of Morphometric Measurements

[摘要] JackSnipeLymnocryptesminimusisasmallwadershowingsexualmonomorphisminplumageandsomedimorphisminsize.Tostudywhetherparametersofbodysizemaybeusedtoreliablysexindividualsofthisspecies,adiscriminantfunctionanalysiswasappliedtoasetofmorphometrictraitsmeasuredinbirdscaughtduringmigrationandthewinteringperiodinnorthernPoland.BirdsweresexedmolecularlybasedonsizedifferencesinCHD-linkedsequencesfromW-andZ-chromosomes.Malesweresignificantlylargerthanfemalesinwinglength,headlength,skulllength,billdepth,billwidthandthelengthofmiddletoewithclaw,whilefemaleshadlongerbills.Alltraitsexceptforbillwidthwerehighlyrepeatable.Astepwisediscriminantfunctionanalysisselectedwinglength,skulllength,billlengthandbilldepthasthebestdiscriminatorsofsexinJackSnipe.Thediscriminantfunctionbasedonthesefourtraitsenabledreliablesexingof99%ofindividuals.Thealternativefunction,excludingwinglength,whichmaynotalwaysbeavailableformeasurement,showed96.7%classificationsuccess.SuchveryhighsuccessinsexidentificationbyadiscriminantanalysisofmorphometrictraitsmaypromotethisapproachasanalternativetomolecularsexingtechniquesinJackSnipe,whennon-invasivesamplingisrequired.

[学科分类] 动物科学

[关键词] Jack Snipe