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Effects of nest box size on the nesting and renesting pattern of Aphrastura spinicauda and Troglodytes aedon Ecología austral
Vergara,Pablo M.
Using large and small nest boxes I determined the effect of the nest box size upon nesting and renesting probability, as well as the reproductive success of two secondary cavity nesters, the thorn-tailed rayadito (Aphrastura spinicauda) and the house wren (Troglodytes aedon) was determined comparing large and small boxes. In order to assess these effects nest boxes were monitored by two consecutive years. Results indicated that Aphrastura nested mainly in the large instead of the small nest boxes, and nesting Troglodytes used primarily small nest boxes. Nevertheless, the renesting pattern of both species, including renesting attempts after successful fledging and after nest failure, was not affected by nest box size and the probability of renesting was not...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Nesting; Renesting probability; Nest box use.
Ano: 2007 URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1667-782X2007000100012
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First description of the micro-habitat selection pattern of the island endemic Juan Fernandez Tit-tyrant Gayana
Soto,Gerardo E; Vergara,Pablo M; Hahn,Ingo J; Pérez-Hernández,Christian G; Lizama,Marlene E; Baumeister,Julia; Pizarro,Jaime.
The level of specialization of endemic island birds to their native habitats could contribute importantly to increase their extinction risk. We used abundance obtained from mist-netting and radio telemetry data from one individual to determine the micro-habitat use pattern of Juan Fernandez Tit-tyrants (Anairetes fernandezianus) within native forest. The tracked male tit-tyrant established its home range exclusively in core native forest areas. Regression models of abundance and Resource Utilization Functions showed strong micro-habitat preferences of tit-tyrants. The abundance and utilization probabilities of tit-tyrants declined with distance to exotic shrub and increased with distance to human created gaps. Natural heterogeneity in micro-habitat...
Tipo: Journal article Palavras-chave: Robinson Crusoe Island; Anairetes fernandezianus; Micro-habitat.
Ano: 2013 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-65382013000100001
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