Occurrence of thrushes in an urban fragment of Araucaria forest in southern Brazil

Biota Neotropica

Huilquer Francisco Vogel²  Cláudio Henrique Zawadzki¹  Rafael Metri¹ 

[1] ,Universidade Estadual de Maringá Departamento de Biologia Programa de Pós-graduação em Ecologia de Ambientes Aquáticos ContinentaisMaringá PR ,Brasil

关键词: passeriformes;    seasonal segregation;    Turdidae;    Turdus;    passeriformes;    segregação sazonal;    Turdidae;    Turdus;   

DOI  :  10.1590/S1676-06032012000400024

来源: SciELO

【 摘 要 】

Seasonal segregation among syntopic species can be viewed as one of the available strategies for coexistence, reducing competitive process. The present work therefore aimed to interpret the assemblage structures comprising birds of the genus Turdus (Turdidae), through the analysis of seasonal variation in the species occurrence in a forest remnant located in the southcenter State of Paraná. Mist-netting was employed twice a month for capturing birds, totalling an annual effort of 7488 h.m². The frequency of occurrence, constancy and class of species dominance was determined, together with the parameters generally used in studies of ecological communities (richness, abundance, diversity and evenness). A total of 162 individuals were captured, representing five species. Turdus rufiventris was the most constant and frequent species. Turdus amaurochalinus and Turdus leucomelas were captured with variable constancies and frequencies along the seasons. Turdus amaurochalinus was also very common and may present an overlapping process between migrant and non-migrant individuals during spring. Turdus albicolis was considered accessory, whereas Turdus subalaris was only registered during the reproductive period. Hence, it was possible to observe that seasonal modifications occurred both in the frequency of occurrence and in the constancy and dominance of species. These results indicated the possibility of a lower use of the environment during the breeding season, as well as the presence of a higher number of individuals in summer and increased abundance of Turdus rufiventris and T. leucomelas during autumn and winter.

【 授权许可】

CC BY   
 All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License