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Subtle sexual plumage color dimorphism and size dimorphism in a South American colonial breeder, the Monk Parakeet(Myiopsitta monachus)

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Avian Research 2020年第2期11卷 157-165页

作者： Macarena Morales deysi j.gigena Santiago MBenitez‑Vieyra Diego j.Valdez Facultad de Ciencias Exactas Físicas y NaturalesCentro de Zoología AplicadaUniversidad Nacional de CórdobaRondeau 798CP X5000AVP CórdobaArgentina Instituto de Diversidad y Ecología Animal(IDEA) Consejo Nacional de Investigaciones Científicas y Técnicas(CONICET)Av.Vélez Sarsfield 299X5000JJC CórdobaArgentina Departamento de Diversidad Biológica y Ecología Facultad de Ciencias ExactasFísicas y NaturalesUniversidad Nacional de CórdobaAv.Vélez Sarsfield 299CP 5000 CórdobaArgentina Instituto Multidisciplinario de Biología Vegetal(IMBIV) Consejo Nacional de Investigaciones Científicas y Técnicas(CONICET)Av.Vélez Sarsfield 1666CP X5016GCN CórdobaArgentina

Background:Parrots(Psittacidae Family)are one of the most colorful groups of birds in the world,their colors pro-duced both structurally and via unusual pigments(psittacofulvins).Most species are considered to be monogamous,and many have been viewed historically as sexually monomorphic and ***,studies using morphometric analysis and spectrophotometric techniques have revealed sexual size dimorphism and also sexual plumage color dimorphism among some *** Monk Parakeet(Myiopsitta monachus),a native parrot of South America,is an interesting species for the study of plumage coloration and size since it is considered sexually mono-chromatic and ***,recent studies show that the Monk Parakeet has extra-bond paternity behavior and even breeding trios,which suggests that sexual selection may play an important role in this species,and that it might have sexually dimorphic plumage(albeit imperceptible by humans)and be dimorphic in ***:For the determination of plumage color we used spectrophotometry in the range of avian vision(300-700 nm)and performed a morphological ***:Our spectrophotometric results indicate that the Monk Parakeet shows subtle sexual plumage color dimor-phism in three(crown,nape and wing)out of twelve body ***,our morphometric analysis showed that there are subtle sex differences in body size(bill and weight).Conclusions:Although the Monk Parakeet shows extra-bond paternity and breeding trio behaviors which could increase sexual dimorphism,these behaviors occur among highly related individuals;perhaps the high rate of inbreeding is responsible for the attenuation of sexual plumage color dimorphism and sex differences in body size observed.

关键词： Argentina Avian vision Colonial breeder Myiopsitta monachus Parrot Sexual plumage color dimorphism Sexual size dimorphism

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