DE ANGELO Carlos Daniel
congresos y reuniones científicas
Jaguar (Panthera onca) population decline in the Upper Paraná Atlantic Forest of Brazil and Argentina
PAVIOLO, AGUSTÍN; DE ANGELO, CARLOS; DI BITETTI, MARIO
Congreso; XIX Annual Meeting of the Society for Conservation Biology; 2005
Society for Conservation Biology
Recent studies suggest that the only portion of the Atlantic Forests of South America that could maintain a viable population of jaguars in the long term (>100 individuals) is the Green Corridor of Misiones, Argentina, and nearby areas of Brazil. To assess the status of this jaguar population we are collecting evidence of its presence and using camera traps to estimate absolute densities. Using program CAPTURE we estimated a mean (± SE) adult population density of 0.66±0.35 inds/100 km2 for Iguazú National Park (N=4 individuals, 1599 trap-nights, 39 sampling stations, area sampled=604.67 km2). At another site (Urugua-í Provincial Park) we captured only one individual during 1428 trap-nights (34 stations, area sampled=246,8 km2). Extrapolating these numbers to areas where jaguars are still present (94,000 km2) we estimated a total population of less than 100 adult individuals for the Green Corridor. This jaguar population has suffered a dramatic decline in the last ten years: density estimates for this population in the early 1990s are 5-9 times higher. This decline is coincident with a reduction in the abundance of peccaries (their most important prey in the area) and with an increase in the abundance of pumas (Puma concolor).