A5017037019- Primate Behavior and Ecology
- Animal Behavior and Reproduction
- Animal Vocal Communication and Behavior
- Wildlife Ecology and Conservation
- Evolutionary Psychology and Human Behavior
- Bat Biology and Ecology Studies
- Neuroendocrine regulation and behavior
- Marine animal studies overview
- Spatial Cognition and Navigation
- Memory and Neural Mechanisms
- Diet and metabolism studies
- Gut microbiota and health
- Species Distribution and Climate Change
- Eating Disorders and Behaviors
- Hypothalamic control of reproductive hormones
- Animal Ecology and Behavior Studies
- Plant and animal studies
- Neural dynamics and brain function
- Olfactory and Sensory Function Studies
- Indigenous Studies and Ecology
- Child and Animal Learning Development
- Rabbits: Nutrition, Reproduction, Health
- Yersinia bacterium, plague, ectoparasites research
- Stress Responses and Cortisol
- Animal Behavior and Welfare Studies
The University of Texas at Austin
2015-2024
Universidad de Xalapa
2024
Universidad Nacional Autónoma de México
2002-2015
University of Illinois Urbana-Champaign
2010-2013
University of Illinois System
2012-2013
University of Wisconsin–Madison
2003-2012
University of Cincinnati
2002
Abstract We studied two multimale–multifemale groups of black howler monkeys ( Alouatta pigra ) during a 14‐month study (June 2006–July 2007) in Palenque National Park, Mexico to evaluate the ways which their sexual behavior changes across ovarian cycles. analyzed 231 fecal samples, collected every 2.2±1.4 days from five females. For four females, estradiol and progesterone profiles revealed an average (±SE) cycle length 18.3±1.4 days. Copulations occurred significantly more frequently...
It has been argued that grouping patterns might influence the reproductive performance of individuals. Increasing group size results in greater travel costs and competition over depletable food resources, which could lead to reduced individual success. However, groups with an increasing number males, female success is predicted augment because larger male better protect immatures from infanticidal attacks. In contrast, decrease males a fertilization cannot be shared between males. this...
Abstract Little is known about the population characteristics of Alouatta pigra under conditions forest fragmentation–information that important to understanding its tolerance habitat loss. In this work we present data on loss and troop size, age, sex composition for a black howler monkeys existing in fragmented landscape surrounding Mayan site Palenque, Chiapas, Mexico. Two aerial photos (1:70,000) study area (261 km 2 ) taken 1984 2001 were examined assess Between June December January...
We investigated demographic patterns and life history traits from several groups of red titi monkeys ( Callicebus discolor ) equatorial sakis Pithecia aequatorialis monitored throughout the first 12 years (November 2003 through May 2015) an ongoing research project in Yasuní National Park Biosphere Reserve, Ecuador. The saki ranged size between two six individuals, comprising either one adult male female or multiple adult‐sized males females, plus immatures. Deviations a pair‐living...
Asymmetries in resource-holding potential between opposing groups frequently determine outcomes of intergroup contests. Since both numerical superiority and high dominance rank may confer competitive advantages, group members should benefit from assessing the relative strength rivals prior to engaging defensive displays. However, differences individual assessment emerge when cost–benefit trade-offs differ among members. We examine influence relationships on participation encounters black...
We investigated the genetic structure and kinship patterns of black howler monkeys ( A louatta pigra ) at P alenque N ational ark, M exico. Fecal samples from 49 individuals residing in eight social groups were successfully genotyped for 19 polymorphic microsatellite markers known to be variable other ateline primates. Overall, diversity was low H o = 0.588) with an average 4.2 alleles per loci (range 2–8). found that intergroup variation among adults relatively high (mean between‐group F ST...
Abstract Background Although navigating along a network of routes might constrain animal movement flexibility, it may be an energetically efficient strategy. Routinely using the same route allows for visually monitoring food resources, which reduce cognitive load and as such facilitate process decision-making. Similarly, locating in areas that avoid costly landscape attributes will enhance their overall energy balance. In this study we determined benefits navigation minimiser arboreal...
Loud calling (i.e., howling) is the single most distinctive behavioral attribute of social system howler monkeys ( Alouatta spp.), yet no general consensus exists regarding its main function. During a 28‐month study five groups black pigra ) at Palenque National Park, Mexico, we examined whether howling mainly functioned in defense food resources, mates, or infants vulnerable to infanticide. We recorded 602 bouts. Howling occurred more frequently when were feeding, particularly on fruits,...
We used data collected during two concurrent studies of black howler monkeys (Alouatta pigra) in Palenque National Park, Mexico, to compare systematically three methods behavioral collection [group activity scan sampling (group scans), instantaneous focal individual (instantaneous focals) and continuous (continuous focals)] proximity (focal scans) nearest neighbor samples)]. conducted pairwise comparisons among using Pearson correlations one-sample t tests. A series Kruskal-Wallis tests were...
Many group‐living animals actively defend a home range against neighboring groups. In many of these societies, males are the primary participants during group defense, while female participation ranges from seldom to frequent. Among howler monkeys ( Alouatta spp.), loud calls (i.e., howling) often used in context intergroup spacing as form cooperative defense. Males initiate and lead howling bouts, but females occasionally participate well. During 28‐month study, I examined social ecological...
Abstract For wild primates, demography studies are increasingly recognized as necessary for assessing the viability of vulnerable populations experiencing rapid environmental change. In particular, anthropogenic changes such habitat loss and fragmentation can cause ecological behavioral in small, isolated populations, which may, over time, alter population density demographic structure (age/sex classes group composition) fragment relative to continuous forest populations. We compared our...