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Rev. biol. trop ; 57(4): 1263-1269, dic. 2009. graf
Article in Spanish | LILACS | ID: lil-637761

ABSTRACT

Vertical distribution of the birds Dendroica pityophila and Teretistris fernandinae (Passeriformes: Parulidae) in Pinar del Río, Cuba. The Yellow-Headed Warbler (Teretistris fernandinae) and the Olive-Capped Warbler (Dendroica pityophila) are two bird species that co-exist in Western Cuba. Their spatial distribution has not been studied. This study evaluated their vertical distribution in pine forests during 2007. Six field trips were conducted to the Tibisí pine groves, Minas de Matahambre, Pinar del Río, Cuba, to determine the differential use of forest strata, with the fixed-radio round parcel method. A total of 30 counting points were located in every forest formation. The forest stratum was recorded for each detected bird according to three categories: low stratum (0-2m over ground), medium stratum (2-6m) and high stratum (6m or more). From the 360 counts carried out, the Olive-Capped Warbler reached greater abundances (3.33±0.14ind/UM) than the Yellow-Headed Warbler (2.32±024ind/UM). No abundance differences were found among both forest formations. The Olive-Capped Warbler had the highest frequency in the high stratum and it was observed in the low stratum only during the reproductive season. The Yellow-Headed Warbler had a preference for the low and medium strata, and was seen less frequently in the high stratum. Rev. Biol. Trop. 57 (4): 1263-1269. Epub 2009 December 01.


La bijirita del pinar (Dendroica pityophila) y la chillina (Teretistris fernandinae) son dos especies de ave residentes permanentes en Cuba, que conviven en la región occidental. Se estudió la distribución vertical de estas dos especies en los bosques de pinos. Durante 2007 se realizaron seis muestreos en pinares del Tibisí, Minas de Matahambre Pinar del Río, para determinar el uso diferencial de los estratos del bosque, empleando el método de parcela circular de radio fijo. En los 360 conteos realizados la bijirita del pinar alcanzó mayores abundancias (3.33±0.14ind/UM) que la chillina (2.32±0.24ind/UM). Para cada especie no hubo diferencias en los valores de abundancia entre ambas formaciones vegetales. Se encontraron diferencias en la frecuencia en que cada especie usa los diferentes estratos de la vegetación. La bijirita del pinar utilizó con mayor frecuencia el estrato alto del bosque; en el estrato bajo solo fue observada durante la etapa reproductiva. La chillina tiene preferencia por el estrato bajo y medio, aunque emplea el alto con menor frecuencia.


Subject(s)
Animals , Passeriformes/classification , Cuba , Population Density , Population Dynamics , Seasons
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