NDLI: Diet and activity in black howler monkeys (Alouatta pigra) in southern Belize: does degree of frugivory influence activity level?

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Primates : Volume 45, Issue 1, January 2004

Diet and activity in black howler monkeys (Alouatta pigra) in southern Belize: does degree of frugivory influence activity level?

Content Provider	Springer Nature Link
Author	Pavelka, Mary S. M. Kpff, Kyle Houston
Copyright Year	2004
Abstract	This study reports on the diet and activity budgets of Central American black howling monkeys (Alouatta pigra) at Monkey River, Belize. This is a previously unstudied population, close to the southern boundary of the species range, and it provides comparative data on A. pigra from a new study site. Both diet and activity are within the ranges reported for other A.pigra sites and for mantled howlers (A. palliata). No age-sex differences could be discerned in either diet or activity, though monthly variation was apparent. The monkeys switch from consuming leaves 86% of the time in January to March to consuming 67% fruit in April to July. This difference was statistically significant, and provided the opportunity to compare activity levels of the monkeys over two dietary periods, one characterized primarily by folivory, the other by frugivory. Howlers are often seen as a relatively inactive species, something that is associated with a low quality, folivorous diet. However, A. pigra have been described as being as frugivorous as possible and as folivorous as necessary. Yet, despite the opportunistic consumption of large quantities of high-energy foods, A. pigra has been observed as conforming to the howler lifestyle, resting as much as 80% of the day. The data in this paper support both of these reports. Black howlers at Monkey River Belize are typically inactive, maintaining high levels of inactivity even during months characterized by frugivory, suggesting that diet is more flexible and varied than is behavior and calling into question the assumption that howler inactivity is due to the digestion of large quantities of leaves.
Starting Page	105
Ending Page	111
Page Count	7
File Format	PDF
ISSN	00328332
Journal	Primates
Volume Number	45
Issue Number	2
e-ISSN	16107365
Language	English
Publisher	Springer-Verlag
Publisher Date	2004-01-21
Publisher Place	Tokyo
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Alouatta pigra Diet and activity Howler monkeys Level of frugivory
Content Type	Text
Resource Type	Article
Subject	Animal Science and Zoology

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