Contents Vol. 92, 2021
Folia Primatol 2021;92:I –IV (Source: Folia Primatologica)
Source: Folia Primatologica - January 25, 2022 Category: Physiology Source Type: research
Sharing Space with Monkeys and Human Tolerance Are Critical Supplements to Primate Conservation, but Not Substitutes for Protected Nature Reserves: A Long-Term View from Sri Lanka, with a Reply to Rudran [2021]
Many investigators of human-monkey competition (HMC) in Sri Lanka have revealed some common threads. Except at temple and protected sites, all monkeys were considered as household or agricultural pests wherever they shared space with humans. This included the widely distributed toque macaque (Macaca sinica), the grey langur (Semnopithecus priam thersites) of the Dry Zone, and the purple-faced langur (S. vetulus) of the southwestern and central rain forests where human densities and habitat fragmentation were greatest. People sharing space with monkeys resorted to various non-lethal methods to chase monkeys away from their ...
Source: Folia Primatologica - January 20, 2022 Category: Physiology Source Type: research
Sharing Space with Monkeys and Human Tolerance Are Critical Supplements to Primate Conservation, but Not Substitutes for Protected Nature Reserves: A Long-Term View from Sri Lanka, with a Reply to Rudran [2021]
Many investigators of human-monkey competition (HMC) in Sri Lanka have revealed some common threads. Except at temple and protected sites, all monkeys were considered as household or agricultural pests wherever they shared space with humans. This included the widely distributed toque macaque (Macaca sinica), the grey langur (Semnopithecus priam thersites) of the Dry Zone, and the purple-faced langur (S. vetulus) of the southwestern and central rain forests where human densities and habitat fragmentation were greatest. People sharing space with monkeys resorted to various non-lethal methods to chase monkeys away from their ...
Source: Folia Primatologica - January 20, 2022 Category: Physiology Source Type: research
Human-Monkey Conflicts in Sri Lanka: A Comment on Dittus et al., 2019
Dittus et al. [Folia Primatologica 2019;90: 89 –108] discuss conflicts in Sri Lanka between people and 4 subspecies of purple-faced langurs, 3 subspecies of toque macaques and a single grey langur subspecies. All of these subspecies are endemic and also listed by the IUCN as endangered or threatened with extinction due to extensive deforestati on. Nevertheless, in order to mitigate conflicts with macaques, the above article recommended buffer zones that “should be at least 100–200 m wide, devoid of trees, shrubs and food sources: pasture could serve this purpose” [Dittus et al., 2019, p. 100]. This recommendation i...
Source: Folia Primatologica - January 20, 2022 Category: Physiology Source Type: research
Human-Monkey Conflicts in Sri Lanka: A Comment on Dittus et al., 2019
Dittus et al. [Folia Primatologica 2019;90: 89 –108] discuss conflicts in Sri Lanka between people and 4 subspecies of purple-faced langurs, 3 subspecies of toque macaques and a single grey langur subspecies. All of these subspecies are endemic and also listed by the IUCN as endangered or threatened with extinction due to extensive deforestati on. Nevertheless, in order to mitigate conflicts with macaques, the above article recommended buffer zones that “should be at least 100–200 m wide, devoid of trees, shrubs and food sources: pasture could serve this purpose” [Dittus et al., 2019, p. 100]. This recommendation i...
Source: Folia Primatologica - January 20, 2022 Category: Physiology Source Type: research
A Fond Farewell to Folia Primatologica
Folia Primatol 2021;92:241-242 (Source: Folia Primatologica)
Source: Folia Primatologica - December 30, 2021 Category: Physiology Source Type: research
A Fond Farewell to Folia Primatologica
Folia Primatol (Source: Folia Primatologica)
Source: Folia Primatologica - December 30, 2021 Category: Physiology Source Type: research
Silky Sifakas ( < b > < i > Propithecus candidus < /i > < /b > ) Use Sleep Sites for Thermoregulation, Food Access and Predator Avoidance
Primate sleeping site selection is influenced by multiple ecological factors including predation avoidance, thermoregulation and food access. To test these hypotheses, we studied the sleeping trees used by a group of wild silky sifakas (Propithecus candidus) in Marojejy National Park, Madagascar. During this 10-month study, the group slept in 828 sleeping trees from approximately 35 genera. In support of thermoregulation, generalized linear models revealed that as temperature decreased, the number of individuals sleeping together significantly increased and they slept at further distances from the trunk. As rainfall increa...
Source: Folia Primatologica - November 8, 2021 Category: Physiology Source Type: research
Silky sifakas (Propithecus candidus) use sleep sites for thermoregulation, food access and predator avoidance
Primate sleeping site selection is influenced by multiple ecological factors including predation avoidance, thermoregulation, and food access. To test these hypotheses, we studied the sleeping trees used by a group of wild silky sifakas (Propithecus candidus) in Marojejy National Park, Madagascar. During this ten-month study, the group slept in 828 sleeping trees from approximately 35 genera. In support of thermoregulation, generalised linear models revealed that as temperature decreased, the number of individuals sleeping together significantly increased and they slept at further distances from the trunk. As rainfall incr...
Source: Folia Primatologica - November 8, 2021 Category: Physiology Source Type: research
Silky sifaka (Propithecus candidus) use sleep sites for thermoregulation, food access and predator avoidance
Primate sleeping site selection is influenced by multiple ecological factors including predation avoidance, thermoregulation, and food access. To test these hypotheses, we studied the sleeping trees used by a group of wild silky sifakas (Propithecus candidus) in Marojejy National Park, Madagascar. During this ten-month study, the group slept in 828 sleeping trees from approximately 35 genera. In support of thermoregulation, generalised linear models revealed that as temperature decreased, the number of individuals sleeping together significantly increased and they slept at further distances from the trunk. As rainfall incr...
Source: Folia Primatologica - November 8, 2021 Category: Physiology Source Type: research
A Test of Foraging Models Using Dietary Diversity Indices for the Lomako Forest Bonobos
Optimal diet and functional response models are used to understand the evolution of primate foraging strategies. The predictions of these models can be tested by examining the geographic and seasonal variation in dietary diversity. Dietary diversity is a useful tool that allows dietary comparisons across differing sampling locations and time periods. Bonobos (Pan paniscus) are considered primarily frugivorous and consume fruits, leaves, insects, vertebrates, terrestrial herbaceous vegetation, and flowers. Frugivores, like bonobos, are valuable for examining dietary diversity and testing foraging models because they eat a v...
Source: Folia Primatologica - November 2, 2021 Category: Physiology Source Type: research
Colour preferences in relation to diet in chimpanzees (Pan troglodytes), gorillas (Gorilla gorilla), and mandrills (Mandrillus sphinx)
Although trichromatic color vision has been extensively studied as it grants significant advantages for Old World primates, it is unknown which selective pressures were behind trait ’s evolution. The leading hypothesis would be that colour vision arose as a foraging adaptation because it allowed individuals to spot food more efficiently. To test this, we exposed three chimpanzees (Pan troglodytes), five gorillas (Gorilla gorilla) and three mandrills (Mandrillus sphinx) to col our cardboard plates to assess if colours related to diet were the most preferred. Experimental setting was divided in two phases. During the first...
Source: Folia Primatologica - November 1, 2021 Category: Physiology Source Type: research
Primate selfies and anthropozoonotic diseases: lack of rule compliance and poor risk perception threatens orangutans.
Our understanding of the transmission of anthropozoonotic diseases between humans and nonhuman primates, particularly great apes due to their close genetic relationship with humans, highlights a serious potential threat to the survival of these species. This is particularly the case at tourism sites where risk of disease transmission is increased. We focus on the interaction between tourists and the Critically Endangered Sumatran orangutan (Pongo abelii) at Bukit Lawang in the Gunung Leuser National Park, Indonesia, before and after the park was closed due to the threat of Covid-19 in April 2020. Through analysis of posts ...
Source: Folia Primatologica - October 25, 2021 Category: Physiology Source Type: research
Initial reintroduction of the aye-aye (Daubentonia madagascariensis) in Anjajavy Reserve, Northwestern Madagascar
Madagascar ’s biodiversity is imperiled by habitat loss and degradation. Furthermore, species may be locally extirpated due to targeted hunting or disease. Translocating at-risk individuals to areas devoid of the species may be an effective conservation intervention. The aye-aye, Daubentonia madagascariensis , is uniquely susceptible to hunting pressure due to a cultural superstition. In June 2018, we reintroduced two aye-ayes in the Anjajavy Reserve, a dry deciduous forest in northwestern Madagascar. The translocated individuals, an adult female and juvenile offspring, were rescued from a neighboring f orest that was su...
Source: Folia Primatologica - October 21, 2021 Category: Physiology Source Type: research
