Demography and Conservation of an Endangered Primate, Brachyteles arachnoids

Demography and Conservation of an Endangered Primate, Brachyteles arachnoids Abstract: Demographic data were obtained on one group of muriquis (Brachyteles arachnoides) over an 8‐year period at Fazenda Montes Claros, Minas Gerais, Brazil. During this period, the group rapidly increased in size, growing from 22 to 43 individuals due to 21 births. Eight disappearances or emigrations were offset by eight immigrations. The group also maintained a stable age‐sex class distribution. Inter‐birth intervals averaged 33.8 months, and age at first reproduction was 71/2% years, or 2.7 interbirth intervals. The high birth rate and low mortality rate, along with increased group fissioning and increased home range size, indicate that this group of muriquis is in a stage of expansion. These demographic data also suggest that some small populations of endangered primates can expand in well‐protected babitats without apparent signs of overcrowding or deleterious effects of close inbreeding. These data, as well as the documentation of female migration and male philopatry, provide important guidelines for future management plans for this species. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Conservation Biology Wiley

Demography and Conservation of an Endangered Primate, Brachyteles arachnoids

Conservation Biology, Volume 5 (2) – Jun 1, 1991

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Publisher
Wiley
Copyright
"Copyright © 1991 Wiley Subscription Services, Inc., A Wiley Company"
ISSN
0888-8892
eISSN
1523-1739
DOI
10.1111/j.1523-1739.1991.tb00126.x
Publisher site
See Article on Publisher Site

Abstract

Abstract: Demographic data were obtained on one group of muriquis (Brachyteles arachnoides) over an 8‐year period at Fazenda Montes Claros, Minas Gerais, Brazil. During this period, the group rapidly increased in size, growing from 22 to 43 individuals due to 21 births. Eight disappearances or emigrations were offset by eight immigrations. The group also maintained a stable age‐sex class distribution. Inter‐birth intervals averaged 33.8 months, and age at first reproduction was 71/2% years, or 2.7 interbirth intervals. The high birth rate and low mortality rate, along with increased group fissioning and increased home range size, indicate that this group of muriquis is in a stage of expansion. These demographic data also suggest that some small populations of endangered primates can expand in well‐protected babitats without apparent signs of overcrowding or deleterious effects of close inbreeding. These data, as well as the documentation of female migration and male philopatry, provide important guidelines for future management plans for this species.

Journal

Conservation BiologyWiley

Published: Jun 1, 1991

References

  • Baboon mothers and infants
    Altmann, J.
  • Current distribution of the muriqui in the Atlantic forest region of eastern Brazil
    Mittermeier, R. A.; Valle, C.; Strier, K. B.; Young, A. L.; Paccagnella, S. G.; Sa, R. M. Lemos

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