We studied the feeding ecology of the black howler monkey (Alouatta pigra) from March 1994 to April 1995 in the Community Baboon Sanctuary in northern Belize, Central America. Activity and diet composition were recorded using continuous focal animal sampling. Diet composition was compared with the relative abundance of plant parts eaten by the howlers within the study site. The study animals spent an average of 24.4% of their time feeding, 61.9% resting, and approximately 9.8% traveling. In contrast to previously published reports on A. pigra, we found the diet composition to be similar to that of other Alouatta species (conforming to the folivore/frugivore profile), with 41% of feeding time spent eating fruit, 45% foliage, and 11% flowers. This contrast may indicate a wide degree of dietary flexibility that allows A. pigra to inhabit a variety of habitat types. We suggest that a high level of resource abundance throughout the year makes the Community Baboon Sanctuary excellent habitat for Alouatta pigra. Am. J. Primatol. 45:263–279, 1998. © 1998 Wiley‐Liss, Inc.

Based on ethical, theoretical and practical concerns, community-based conservation projects have developed over the past 2 decades as alternatives to traditional protected areas. Recent criticisms of such programmes by biologists and social scientists involve a debate on who should manage our natural resources. Such criticisms have focused on large integrated conservation and development projects (ICDPs) and have largely ignored the successes of small community conservation projects. Practitioners of ICDPs have also been disappointed with the results of their projects and are seeking answers from ICDP failures. Two important differences separate community conservation projects and ICDPs and have led to the success of the smaller projects: (1) community conservation projects see local rural people as the solution to habitat degradation whereas ICDPs see them as the problem, (2) the scale of the smaller projects is at the community level but can use the same methods regionally, whereas ICDPs are large in scale and cost. We discuss, from a practitioner’s viewpoint, the strengths that contribute to the successes of community conservation projects, including actually functioning at the community level, creating an empowered community group to carry on the social sustainability of the project, continuous basic level funding, and the importance of monitoring.

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ABSTRACT. The geographic range of the black howler, Alouatta pigra in Mexico, Guatemala, and Belize was investigated by travelling through and visiting 65 locations within or close to the expected range. The existence of the species was noted through first hand observations or was documented by talking with residents and knowledgeable people in the area. Observations were made on captive animals as well. All sites and probable sites of A. pigra were noted to be under 1,300 ft in altitude and in areas with a mean annual temperature above 25~ and a mean annual rainfall over 1,000 mm per year. This area coincides with tropical rain forest areas, including both tropical evergreen and semievergreen rain forests. A. pigra was most plentiful in riverine areas which showed flooding for some part of the year. Two areas of possible sympatry with A. palliata were noted. In all cases, the troop sizes of A. pigra were extremely small, under ten individuals, and infants could easily be sexed, in contrast to A. palliata which is known to occur in troops of 15-18 and is difficult to sex at an early age.Finally, a very gross method for population estimation from searching time emerged from the study.

ABSTRACT. Adulterous breeding between a female howling monkey (Alouatta pigra) of one troop with a male of an adjacent troop occurred despite territorial defense between the two troops. The specific behaviors are described as well as a synopsis of daily events which occurred between the female and two males from adjacent troops. A discussion of how this interaction and the behavior patterns relate to what is known about breeding in howler monkeys and related species follows.

Amazonas and San Martin are two of the most densely populated regions in rural Peru and have some of the highest deforestation rates in the country. They are also home to many threatened and endemic species and are considered a high priority for conservation. Under Peruvian law individuals and community groups can create private conservation areas and conservation concessions, and we evaluated the successes and challenges experienced in the creation and management of such areas, using direct observation, questionnaires and key-informant interviews. Our results show that far from being a problem for conservation many rural communities are actively promoting or participating in conservation initiatives on a local scale with landscape-level impacts. These initiatives include land protection, hunting control and reduced deforestation, thus providing effective solutions to threats. The main obstacles we identified in relation to such campesino (peasant farmer) conservation initiatives were the lack of access to support from governmental and nongovernmental institutions and to economic resources to fund the extensive bureaucratic processes of registering protected areas. Many campesino communities bypass these restrictions through informal conservation initiatives.

Threats to biodiversity are well documented. However, to effectively conserve species and their habitats, we need to know which conservation interventions do (or do not) work. Evidence-based conservation evaluates interventions within a scientific framework. The Conservation Evidence project has summarized thousands of studies testing conservation interventions and compiled these as synopses for various habitats and taxa. In the present article, we analyzed the interventions assessed in the primate synopsis and compared these with other taxa. We found that despite intensive efforts to study primates and the extensive threats they face, less than 1% of primate studies evaluated conservation effectiveness. The studies often lacked quantitative data, failed to undertake postimplementation monitoring of populations or individuals, or implemented several interventions at once. Furthermore, the studies were biased toward specific taxa, geographic regions, and interventions. We describe barriers for testing primate conservation interventions and propose actions to improve the conservation evidence base to protect this endangered and globally important taxon.

ABSTRACT. Roaring was recorded during 15-min intervals for 55 days from April 29 to July 14, 1981 in the area around Bermuda Landing, Belize. Roaring profiles were compiled to represent four three-week periods in which roaring was graphed against the time of day. Rates of roaring were also calculated for three troops. Results indicate a gradual change in the daily profile of roaring from dry to rainy season. The marked bimodality of roaring at dawn and dusk in the dry season changed to a more dampened bimodality with reduced dawn and dusk peaks and more roaring during the midday in the rainy season. This seems related to the decreased hours of sun and the amount of rain during the wet season. Additionally, literature on monkeys with long range vocalizations suggests that bimodal peaks in calling may be more prevalent in species which display territorial defense.