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Parental testosterone and estradiol concentrations in the early nestling period correlate with the age-dependent breeding performance in Tawny Owls Strix aluco

Lajos Sasvari, Auteur ; Peter Peczely, Auteur ; Zoltan Hegyi, Auteur

Dans Ornis Fennica (85(2) 2008)

Steroid hormones, which have not previously been examined in nocturnal raptors, were studied in male and female Tawny Owls (Strix aluco). The role of sex steroids during their peak concentrations - the territorial period and egg formation - has [...]

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Article

Post-hatching testosterone concentration reflects nestling survival and pre-fledging offspring condition in the Tawny Owl Strix aluco

Lajos Sasvari, Auteur ; Isao Nishiumi, Auteur ; Peter Peczely, Auteur ; Zoltan Hegyi, Auteur

Dans Ornis Fennica (87(1) 2010)

We examined parental condition, brood sex composition, hatching order and post-hatching testosterone concentration in relation to nestling survival and pre-fledging offspring condition on Tawny Owls Strix aluco in Duna-Ipoly National Park, Hunga[...]

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