Does the reproductive season account for more records of birds in a marked seasonal climate landscape in the state of São Paulo, Brazil?

Papéis Avulsos de Zoologia (São Paulo)

Vagner Cavarzere¹ 

[1] ,Universidade de São Paulo Instituto de Biociências Departamento de ZoologiaSão Paulo SP ,Brasil

关键词: Breeding season;    Neotropical region;    Sampling period;    Seasonal abundance;    Seasonal climate;    Seasonal species richness;    Abundância sazonal;    Clima sazonal;    Estação reprodutiva;    Período de amostragem;    Região neotropical;    Riqueza sazonal;   

DOI  :  10.1590/S0031-10492013001800001

来源: SciELO

【 摘 要 】

Investigators have reported that birds from temperate regions are more detectable during their breeding seasons, which should be used to adequately survey avifaunas. In the state of São Paulo, southeastern Brazil, the rainiest months of the year are usually associated with a peak in the reproduction of birds. To test the hypothesis that birds are equally detectable throughout the year, I conducted transect counts of birds in a predominantly open Cerrado landscape in São Paulo during 2005 and 2006. There was no significant difference in the number of species or individuals between breeding (rainy) and nonbreeding (dry) seasons; 24% of the species with > 50 contacts was likely to be recorded more often in a particular season. Unlike temperate regions, where vocal behavior plays an important role in detections of birds during and after reproductive seasons, my results suggest that Cerrado birds may be evenly detected throughout the year.

【 授权许可】

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