Document Detail

Feeding and Resting Postures of Wild Northern Muriquis (Brachyteles hypoxanthus).
MedLine Citation:
PMID:  23070942     Owner:  NLM     Status:  Publisher    
Increased body size in Brachyteles has been regarded as an important evolutionary adaptation that allowed a greater reliance on leaves compared to other more frugivorous Atelidae, but its association with muriqui positional behavior and substrate use is still unknown. Here, we present original data on the feeding and resting postures of the northern muriqui (Brachyteles hypoxanthus) and evaluate predictions about the relationships between body size, postural behavior, and substrate use derived from previously published data for other atelids (e.g. Alouatta, Ateles, and Lagothrix). The study was undertaken from August 2002 to July 2003 on a large group of well-habituated muriquis inhabiting the Reserva Particular do Patrimônio Natural - Felíciano Miguel Abdala in Minas Gerais, Brazil. Consistent with our predictions, we found that B. hypoxanthus was highly suspensory during postural feeding (60.9%) and commonly used tail-hind limb suspension/horizontal tripod (38.0%) or tail-forelimb/hind limb suspension (21.4%). However, although tail-suspensory postures permitted the muriquis to use the terminal canopy and small-sized substrates, these areas were also accessed via tail-assisted above-branch postural behaviors involving multiple substrates. Unexpectedly, tail-suspensory postures were found to be frequently associated with large substrates, tree trunks, and the understory. We suggest that Brachyteles' ability to access food resources from all areas of a feeding tree and from tree crowns at different canopy levels may account for their ability to efficiently exploit food resources in seasonal disturbed forest fragments of the Brazilian Atlantic Forest today. Am. J. Primatol. 00:1-14, 2012. © 2012 Wiley Periodicals, Inc.
Maria F Iurck; Matthew G Nowak; Leny C M Costa; Sérgio L Mendes; Susan M Ford; Karen B Strier
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-10-15
Journal Detail:
Title:  American journal of primatology     Volume:  -     ISSN:  1098-2345     ISO Abbreviation:  Am. J. Primatol.     Publication Date:  2012 Oct 
Date Detail:
Created Date:  2012-10-16     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8108949     Medline TA:  Am J Primatol     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
© 2012 Wiley Periodicals, Inc.
Núcleo de Estudos do Comportamento Animal, Pontificia Universidade Católica do Paraná, Centro de Ciências Biológicas e da Saúde, Curitiba,, PR, Brasil.
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