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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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Predation risk of Tawny Owl Strix aluco nests in relation to altitude, breeding experience, breeding density and weather conditions

Lajos Sasvari, Auteur ; Zoltan Hegyi, Auteur

Dans Ardea (99(2) FAL 2011)

Sasvari L. & Hegyi Z. 2011. Predation risk of Tawny Owl Strix aluco nests in relation to altitude, breeding experience, breeding density and weather conditions. Ardea 99: 227-232. Nest predation was studied in a population of Tawny Owls Strix al[...]

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