REPRODUCTIVE SUCCESS OF THE CREAMY-BELLIED THRUSH IN A SOUTHERN TEMPERATE ZONE

ASTIÉ, ANDREA ALEJANDRA; LUCHESI, NATALIA

WILSON JOURNAL OF ORNITHOLOGY

WILSON ORNITHOLOGICAL SOC

Año: 2012 p. 136 - 141

1559-4491

We describe the breeding biology and reproductive success of a Creamy-bellied Thrush (Turdusamaurochalinus) population from a southern temperate zone in western Argentina. We found 236 Creamy-bellied Thrushnests of which most were predated (67%). The breeding season was from late October to late December and clutch size wasthree eggs. Egg survival, hatching success, and fledgling survival of non-depredated nests were quite high (0.67 6 0.03,0.74 6 0.03, and 0.87 6 0.04, respectively). The number of eggs in the nest did not affect egg survival or hatching success,but number of nestlings in the nest affected fledgling success. Daily nest mortality was higher during the early and latenestling period than during laying, and early and late incubation periods. Highest nest mortality coincided with periodswhen activity of parents at the nest was highest. The clutch size was similar to data reported for thrushes from the tropicsand south temperate areas, and lower than reported for thrushes from north temperate areas. This latitudinal pattern issimilar to the general pattern described for passerines in the tropics and southern temperate areas.