Resumen Realizamos un estudio comparativo de los patrones de actividad del jaguar y el puma dentro de un mosaico de áreas protegidas (AMR) y en un rancho ganadero (CR) en Pantanal, Brasil, para comprender mejor sus patrones de actividad en estos paisajes. Presumimos que los patrones de actividad del jaguar y el puma estarían sesgados al período nocturno en la ganadería, pero no en las áreas protegidas. Utilizamos datos de cámaras trampa analizados a través de un enfoque de densidad kernel no paramétrico para explorar las relaciones temporales interespecíficas e intraespecíficas entre estas especies en ambos sitios. Obtuvimos 71 registros independientes de jaguar y 29 de puma en AMR, y 85 registros independientes de jaguar y 26 de puma en CR. Los patrones de actividad de jaguares y pumas difirieron entre sitios, siendo ambos catemerales en AMR, pero nocturnos en CR con superposiciones de moderadas a altas, de acuerdo con nuestra hipótesis. En general, nuestros datos sugieren que la ganadería no es incompatible con la existencia de jaguares y pumas, sino que moldea su patrón de actividades.

Abstract We conducted a comparative study of jaguar and puma activity patterns within a mosaic of protected areas (AMR) and on a cattle ranch (CR) in Pantanal, Brazil, to better understand their activity patterns in these landscapes. We hypothesized that the activity patterns of the jaguar and puma would be biased to the nocturnal period within the cattle ranch but not in the protected areas. We used data from camera traps analyzed through a non-parametric kernel density approach to explore interspecific and intraspecific temporal relationships between these species at both sites. We obtained 71 jaguar and 29 puma independent records at AMR, and 85 jaguar and 26 puma independent records at CR. Activity patterns of jaguars and pumas differed between sites, both being cathemeral in AMR, but nocturnal at CR with moderate to high overlaps, concordant with our hypothesis. Overall, our data suggest that the cattle ranching is not incompatible with the existence of jaguars and pumas but does shape their pattern of activities.

Iraras apresentam variações de coloração por toda sua área de distribuição, sendo o objetivo deste estudo contribuir para o conhecimento destas variações. Na Reserva Biológica Estadual do Sassafrás, Santa Catarina, Brasil, foram obtidos 21 registros fotográficos de iraras, abrangendo diferentes colorações de pelagem. Duas classes de coloração foram observadas entre os indivíduos fotografados: corpo escuro com cabeça e pescoço cinzas e corpo, cabeça e pescoço branco-amarelados. A freqüência dos registros não variou significativamente entre as duas classes de coloração, indicando que a coloração de pelagem branco-amarelada é comum para esta população local.

Tayras present color variations along their range of distribution. The objective of this study is to contribute to the understanding of these variations. In the State Biological Reserve of Sassafrás, Santa Catarina, Brazil, 21 photographic records of tayras were obtained, comprising different coat colors. Two coat color classes were observed among photographed individuals: dark body with gray head and neck, and body, head and neck homogeneously white-yellowish. The frequency of records did not varied significantly between the two color classes, indicating that the white-yellowish coloration is common for this local population.