Use of traps to capture black and gold howlers (Alouatta caraya) on the islands of the Upper Parana river, Southern Brazil

The first efficient capture program for black and gold howlers (Alouatta caraya) using traps that was implemented on the islands of the upper Parana River in Southern Brazil is described. The described system would serve as an alternative capture program for howlers in areas that have low food diversity and no other mammal species that will compete for bait, as is observed in riparian environments, islands, and forest fragments.