American Journal of Primatology

Cover image for Vol. 79 Issue 2

Executive Editor: Paul A. Garber

Impact Factor: 2.103

ISI Journal Citation Reports © Ranking: 2015: 23/161 (Zoology)

Online ISSN: 1098-2345

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  1. Functional planning units for the management of an endangered Brazilian titi monkey

    Sidney F. Gouveia, João Pedro Souza-Alves, Bruno B. de Souza, Raone Beltrão-Mendes, Leandro Jerusalinsky and Stephen F. Ferrari

    Version of Record online: 19 JAN 2017 | DOI: 10.1002/ajp.22637

    We propose a scheme to define and classify planning units across landscapes to guide management practices for a Brazilian titi, Callicebus coimbrai. The scheme is reproducible for other species and locations, according to their specific requirements.

    To assist conservation practices in the tropics, decision-makers must resort to useful information on conservation targets, such as species and habitats, and specify an appropriate spatial scale to execute these practices. In this study, we use a local flagship species (Coimbra-Filho's titi monkey, Callicebus coimbrai) from eastern Brazil to define a set of contiguous landscapes, termed planning-units, which are representative of this species’ occurrence. We accounted for the species attributed, namely dispersal ability and home range, to measure functional landscape metrics of the planning units and classify them according to the species requirements …

    By defining a set of landscape units that account for critical aspects of the focal species, the information available on these conservation targets can support regional conservation policies. Here, we define and classify adjacent landscapes, termed planning units, to orientate management decisions within and among these landscapes, which are occupied by an endangered flagship primate species (Coimbra-Filho's titi monkey, Callicebus coimbrai) from eastern Brazil. We use landscape boundaries (highways and river systems), and a high-resolution map of forest remnants to identify continuous and manageable landscapes. We employed functional landscape metrics based on the species’ dispersal ability and home range size to characterize and classify these landscapes. We classified planning units by scoring them according to a suite of selected metrics through a Principal Component Analysis. We propose 31 planning units, containing one to six C. coimbrai populations, most with low values of habitat availability, functional connectivity and carrying capacity, and a high degree of degradation. Due to this poor landscape configuration, basic management practices are recommendable. However, additional aspects of the landscapes and the populations they contain (e.g., matrix type and genetic variability) should improve the scheme, which will require a closer integration of research aims with socio-political strategies. Even so, our scheme should prove useful for the combination of information on conservation targets (i.e., focal species) with management strategies on an administrative scale.

  2. Validation of an enzyme immunoassay and comparison of fecal cortisol metabolite levels in black and gold howler monkeys (Alouatta caraya) inhabiting fragmented and continuous areas of the humid Chaco region, Argentina

    Verónica Inés Cantarelli, Maria Amparo Perez-Rueda, Martin M. Kowalewski, Gabriela F. Mastromonaco and Marina Flavia Ponzio

    Version of Record online: 18 JAN 2017 | DOI: 10.1002/ajp.22625

    Validation of an enzyme immunoassay and comparison of fecal cortisol metabolite levels in black and gold howler monkeys (Alouatta caraya) inhabiting fragmented and continuous areas of the humid Chaco region, Argentina. Contrary to our initial prediction, no significant differences in Alouatta caraya fecal cortisol metabolite levels were detected; cortisol metabolites were significantly higher in females. Probably, animals adjusted their diet to cope with feeding in degraded habitats, but with new leaves and buds.

  3. Automated face detection for occurrence and occupancy estimation in chimpanzees

    Anne-Sophie Crunchant, Monika Egerer, Alexander Loos, Tilo Burghardt, Klaus Zuberbühler, Katherine Corogenes, Vera Leinert, Lars Kulik and Hjalmar S. Kühl

    Version of Record online: 17 JAN 2017 | DOI: 10.1002/ajp.22627

    Using semi-automated ape face detection technology for processing camera trap footage requires only 2–4% of the time compared to manual analysis and allows to estimate site use by chimpanzees relatively reliably.