Do Predators and Thermoregulation Influence Choice of Sleeping Sites and Sleeping Behavior in Azara’s Owl Monkeys (Aotus azarae azarae) in Northern Argentina?

  title={Do Predators and Thermoregulation Influence Choice of Sleeping Sites and Sleeping Behavior in Azara’s Owl Monkeys (Aotus azarae azarae) in Northern Argentina?},
  author={Amanda Savagian and Eduardo Fern{\'a}ndez‐Duque},
  journal={International Journal of Primatology},
The spatiotemporal aspects of sleeping behavior are indicative of the ecological pressures that primate species face. We investigated the potential influence of predation and thermoregulatory constraints on sleeping site choice and sleep-related behaviors in a population of cathemeral owl monkeys (Aotus azarae azarae) in Formosa, Argentina. During 10 mo, we recorded data on 153 diurnal sleeping bouts (N = 5 groups), sleeping tree physical characteristics (diameter at breast height [DBH], height… 

Sleeping site and tree selection by Sichuan snub‐nosed monkeys (Rhinopithecus roxellana) in Baihe Nature Reserve, Sichuan, China

It is found that certain characteristics of sleeping sites and sleeping trees predicted their selection by R. roxellana, that is, large groups living in temperate climates, which required a balanced strategy for sleeping site and tree selection in order to optimize their survival chances.

Deciding Where to Sleep: Spatial Levels of Nesting Selection in Chimpanzees (Pan troglodytes) Living in Savanna at Issa, Tanzania

Tree height was the most important variable for both nesting site and tree selection in this study, suggesting that chimpanzees selected both safe sites and secure trees for sleeping.

The Effects of Social Factors and Kinship on Co-sleeping of Black-and-Gold Howler Monkeys (Alouatta caraya)

The results showed that black-and-gold howlers preferred to sleep in clusters, and that the composition of these clusters was affected by age class, diurnal social interactions, and kinship, and association during daytime activities was a significant predictor of nocturnal grouping.

Effects of cold weather on the sleeping behavior of Skywalker hoolock gibbons (Hoolock tianxing) in seasonal montane forest

It is suggested that cold temperatures have a significant effect on the sleeping behavior of the Skywalker hoolock gibbon, highlighting the adaptability of this threatened species in response to cold climates.

The Effects of Climate Seasonality on Behavior and Sleeping Site Choice in Sahamalaza Sportive Lemurs, Lepilemur sahamalaza

Overall, the results indicate that Sahamalaza sportive lemur behavior varies with season, in line with reports for other primates.

When Northern Pigtailed Macaques (Macaca leonina) Cannot Select for Ideal Sleeping Sites in a Degraded Habitat

The results present a new impact of habitat degradation on sleeping site selection in large primate groups: the use of a high number sleeping sites in order to cope with low availability and scattered distribution of fruit resources.

Allogrooming in Male-Female Pairs of Captive Owl Monkeys (Aotus nancymaae)

It is concluded that allogrooming in Aotus is a normal part of their behavioral repertoire that likely serves social functions similar to those in other pair-bonded primates.

Nocturnal behavior by a diurnal ape, the West African chimpanzee (Pan troglodytes verus), in a savanna environment at Fongoli, Senegal.

  • J. Pruetz
  • Psychology
    American journal of physical anthropology
  • 2018
Evidence is provided that chimpanzees may exhibit behaviors that allow them to avoid high temperatures in a savanna environment, such as feeding and socializing at night during the hottest time of year and in the brightest moon phases, which support theories invoking thermal stress as a selective pressure for hominins in open environments where heat would constrain temporal foraging niches.

Bed site selection by a subordinate predator: an example with the cougar (Puma concolor) in the Greater Yellowstone Ecosystem

M measuring bed site attributes may provide a novel means of measuring the use of refugia by subordinate predators, and ultimately provide new insights into the habitat requirements and energetics of subordinate carnivores.

Sleeping Behavior of the Secretive Puerto Rican Twig Anole, Anolis occultus

Data is reported on the ethoecology of sleep in the Puerto Rican twig anole, Anolis occultus, including sleeping position and the selection of sleeping sites, which provide further evidence for the possibility of convergence in sleeping behavior among anoles belonging to the twig ecomorph.



Sleeping Site Selection by the Golden‐handed Tamarin Saguinus midas midas: The Role of Predation Risk, Proximity to Feeding Sites, and Territorial Defence

Cumulative plot analysis indicated that a tamarin troop used 30-40 sleeping sites in a 100-day period, approximately half of which were used very infrequently, so that consecutive reuse was never greater than three nights.

Sleeping site preferences in tufted capuchin monkeys (Cebus apella nigritus)

It is suggested that predation avoidance is a predominant factor driving sleeping site preferences, and the preference for trees with low probability of shedding branches suggest that social preferences and safety from falling during windy nights may also affect sleeping tree selection.

Sleeping site selection and presleep behavior in wild pigtailed macaques

The temporal pattern of use of sleeping sites, with a preference for four of the sleeping sites but few reuses during consecutive nights, may be a trade‐off between the need to have several sleeping sites (decreasing detection by predators and travel costs to feeding sites), and the need for sleep in well‐known sites (guaranteeing a faster escape in case of predator attack).

Exploring the Multiple Functions of Sleeping Sites in Northern Pigtailed Macaques (Macaca leonina)

Overall, predator avoidance and food efficiency were the main factors influencing the selection of sleeping sites, which highlights the impact anthropogenic activities may have on sleeping site selection and the flexibility of sleeping patterns in a single species.

Baboon sleeping site preferences and relationships to primate grouping patterns

  • W. Hamilton
  • Environmental Science
    American journal of primatology
  • 1982
Choice of sleeping sites in an order appearing to agree with degree of inaccessibility to most predators suggests the hypothesis that predation avoidance is the major basis for use and choice of particular sleeping sites.

Do Forest Composition and Fruit Availability Predict Demographic Differences Among Groups of Territorial Owl Monkeys (Aotus azarai)?

It is proposed that owl monkey groups inhabit territories of different structure and composition and food availability, yet ones that contain similar quantities of, mostly, dry season fruit sources, to overcome food shortages safely during limiting periods in this markedly seasonal forest.

Characteristics of Night Sleeping Trees of Proboscis Monkeys (Nasalis larvatus) in Sabah, Malaysia

Choice of sleeping trees by proboscis monkeys is likely to be related to risks of predation and injury from falling, as well as ease of social interaction and efficiency of locomotion.

Sleeping site selection by proboscis monkeys (Nasalis larvatus) in West Kalimantan, Indonesia

This study has shown that proboscis monkeys (at Sungai Tolak) have a very strong preference for large trees located near the river, which may exacerbate the problems of forest loss for these endangered monkeys.

Sleeping sites and lodge trees of the night monkey (Aotus azarae) in Bolivia

The structure of sleeping-site compared lodge trees to nonlodge trees, and the frequency of their use were characterized; the distribution of lodge trees appeared to be related to access to food and activities around the sleeping site could berelated to marking behavior.

Sleeping sites, sleeping trees, and sleep‐related behaviors of black crested gibbons (Nomascus concolor jingdongensis) at Mt. Wuliang, Central Yunnan, China

It is suggested that sleep‐related behaviors are primarily adaptations to minimize the risk of being detected by predators, and sleeping trees may be chosen to make approach and attack difficult for the predator, and to provide an easy escape route in the dark.