Evidence for assortative mating in sympatric populations of orange-fronted (Cyanoramphus malherbi) and yellow-crowned (C. auriceps) kākāriki | Notornis and Birds New Zealand

Southern Bird

Kearvell, JC¹  Steeves, TE¹ 

关键词: assortative mating;    conservation;    Cyanoramphus;    parakeet;    translocation;   

DOI  :  

学科分类：农业科学（综合）

来源: Ornithological Society of New Zealand Inc.

【 摘 要 】

Theremnantwildpopulationsofthecriticallyendangeredorange-frontedkākāriki(Cyanoramphusmalherbi)arerestrictedto3NorthCanterburyvalleyswheretheyco-occurwiththeyellow-crownedkākāriki(C.auriceps).MixedpairsofCyanoramphuskākārikispecieshavebeendocumentedthroughoutthegenus,buttheextenttowhichorange-frontedandyellow-crownedkākārikimateassortatively,particularlywhenonespeciesoutnumberstheother,remainsunclear.Here,weinvestigatethelevelofassortativematingbetweenorange-frontedandyellow-crownedkākāriki.Basedon355confirmednestsduring1999-2011,99%(n=351)werepurepairingsand1%(n=4)weremixedpairings.Withoneexception,theratiooforange-frontedtoyellow-crownedkākārikiencounteredduringannualsurveysrangedbetweenzeroand0.78.Theseresultsindicatethatthe2congenersexhibitassortativemating,evenwhentheorange-frontedkākārikiisoutnumberedbyyellow-crownedkākāriki.Thelowlevelsofmixedpairingweobservedsuggeststhatthereintroductionoforange-frontedkākārikishouldnotbeprecludedtositeswhereyellow-crownedkākārikialreadyoccur.

【 授权许可】

Unknown