Apparent survival and cost of reproduction for White-lined Tanager (Tachyphonus rufus, Thraupidae) in the northern Atlantic Rainforest, Brazil

作者：Macario Phoeve^*; Pichorim Mauro; Doherty Paul F Jr; Toledo Lima Guilherme S; Oliveira Junior Tonny M; Camara Thanyria P F; Melo Shirley Macjane; Silveira Joao Lucas S; Araujo Juliana C; Franca Leonardo F

来源：PLos One, 2017, 12(10): e0185890.

DOI：10.1371/journal.pone.0185890

Understanding latitudinal variation in avian life-history traits has been a focus of many demographic studies around the world. However, we still know little about annual or intra-annual demographic variation within tropical regions or about how factors such as breeding season and precipitation influence demographic rates. In this study, we estimated intra-annual apparent survival of the White-lined Tanager (Tachyphonus rufus) using capture-markrecapture data from northeastern Brazil. We tested whether survival varied seasonally (breeding vs. non-breeding), with rainfall, by age and residence status in our study area. Intra-annual apparent survival was correlated with the reproductive cycle, being lower during the breeding (0.65 +/- 0.16 SE) vs. the non-breeding season (0.97 +/- 0.05 SE). The annual apparent survival (similar to 0.6) was relatively low for a tropical species. In both years, we observed highest abundance in spring (November, 3.1-3.7 birds/ha) and lowest abundance in autumn-winter periods (May-August, 1.1-1.4 bird/ha). The low survival during the breeding season probably reflects the trade-off between survival and reproduction and the cost of reproduction. Our findings represent an advance in the understanding of the demography of tropical birds because we did not find a predicted high annual apparent survival, and we elucidated some aspects of intra-annual variation in survival. Further exploration of latitudinal variation in demographic traits, especially in diverse, but poorly known habitats is needed to fully vet and develop life history theories.

• 出版日期2017-10-10