In October 2012 individuals associated with the Green Heritage Fund Suriname organized a rescue of arboreal mammals displaced during deforestation of a 6.8 ha plot in northwest Paramaribo. Rescued or observed animals included 137 pale-throated three-toed sloths (Bradypus tridactylus), eight two-toed sloths (Choloepus didactylus), three Brazilian porcupines (Coendou prehensilis), and three silky anteaters (Cyclopes didactylus). In addition, two lesser anteaters (Tamandua tetradactyla) -a mother and baby -were seen but not rescued. Due to their lack of speed and inability to escape, it is likely that almost all of the pale-throated sloths in the forested plot were captured during the thirty-day period of clear-cutting. Comprising 91% of the total rescued animals, the 137 B. tridactylus included 61 males, 56 females, 15 juveniles, and five adults that could not be sexed. Data on body mass, length, and other features reveal a population of reasonably healthy but smaller animals at a population density of 20.1 animals/ha that far exceeds any previous reports for this species.Keywords: habitat fragmentation, Pilosa, population density, urban mammal, urbanophilic, Xenarthra Inesperada alta densidad de perezosos de tres dedos (Bradypus tridactylus) en un parche de bosque urbano en Paramaribo, Suriname Resumen En octubre de 2012, voluntarios asociados a Green Heritage Fund Suriname organizaron un rescate de mamíferos arbóreos desplazados durante la deforestación de una parcela de 6,8 ha situada al noroeste de Paramaribo. Los animales rescatados incluyeron 137 perezosos de tres dedos (Bradypus tridactylus), ocho perezosos de dos dedos (Choloepus didactylus), tres puercoespines brasileños (Coendou prehensilis) y tres hormigueros sedosos (Cyclopes didactylus). Además fueron vistos dos osos meleros (Tamandua tetradactyla) -una madre y su cachorro -aunque no fueron recogidos. Debido a su baja velocidad y su incapacidad para esconderse, es probable que prácticamente todos los animales de la parcela fueran capturados durante el período de tala de 30 días. Bradypus tridactylus representó el 91% del total de los animales rescatados; de los 137 individuos, 61 eran machos, 56 hembras, 15 juveniles y cinco adultos que no pudieron ser sexados. Los datos colectados sobre peso corporal, longitud y otras características muestran una población de animales razonablemente sanos pero más pequeños, con una densidad poblacional de 20,1 animales/ha que excede con creces a la de cualquier reporte previo de esta especie.Palabras clave: densidad poblacional, fragmentación de hábitat, mamíferos en áreas urbanas, Pilosa, Xenarthra
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