Autor(es): Foster, Vania C. ; Sarmento, Pedro ; Sollman, Rahel ; Torres, Natalia ; Jácomo, Anah T. A. ; Negrões, Nuno ; Fonseca, Carlos ; Silveira, Leandro
Data: 2013
Identificador Persistente: http://hdl.handle.net/10773/24220
Origem: RIA - Repositório Institucional da Universidade de Aveiro
Assunto(s): Camera trapping; Coefficient of overlapping; Kernel density estimator; Panthera onca; Predator coexistence; Puma concolor; Temporal partitioning
Jaguars (Panthera onca) and pumas (Puma concolor) coexist throughout the Neotropics. Using camera trapping in four Brazilian biomes, we compare the daily activity patterns of the jaguar and puma, and their relationships with their main prey species. We used a kernel density method to quantify daily activity patterns and to investigate overlap between these predators and their main prey. Both cats showed intensive nocturnal and crepuscular activity (0.69 and 0.14 kernel density, respectively, for jaguars; 0.68 and 0.19 kernel density, respectively, for pumas). Only in the Pantanal did we observe a pattern of concentrated diurnal activity for both species. We found little temporal segregation between jaguars and pumas, as they showed similar activity patterns with high coefficients of overlapping (average Δ1 = 0.86; SE = 0.15). We also observed a significant overlap between the activity patterns of the predators and their main prey species, suggesting that both predators adjust their activity to reduce their foraging energy expenditure. Our findings suggest that temporal partitioning is probably not a generalized mechanism of coexistence between jaguars and pumas; instead, the partitioning of habitat/space use and food resources may play a larger role in mediating top predator coexistence. Knowledge about these behavior aspects is crucial to elucidating the factors that enable coexistence of jaguars and pumas. Furthermore, an understanding of their respective activity periods is relevant to management and associated research efforts.
