journal
https://read.qxmd.com/read/38528366/capuchin-monkeys-sapajus-cebus-apella-categorization-of-photos-of-unknown-male-conspecifics-suggests-attention-to-fwhr-and-a-dominance-bias
#1
JOURNAL ARTICLE
Ashley M Meacham, Meghan J Sosnowski, Heather M Kleider-Offutt, Sarah F Brosnan
The ability to quickly perceive others' rank minimizes costs by helping individuals behave appropriately when interacting with strangers. Indeed, humans and at least some other species can quickly determine strangers' rank or dominance based only on physical features without observing others' interactions or behavior. Nonhuman primates can determine strangers' ranks by observing their interactions, and some evidence suggests that at least some cues to dominance, such as facial width-to-height ratio (fWHR), are also present in other primates...
March 25, 2024: American Journal of Primatology
https://read.qxmd.com/read/38528343/where-the-small-things-are-modelling-edge-effects-on-mouse-lemur-population-density-and-distribution-in-northwestern-madagascar
#2
JOURNAL ARTICLE
Fernando Mercado Malabet, Malcolm Ramsay, Coral Chell, Bertrand Andriatsitohaina, Ute Radespiel, Shawn Lehman
Edge effects result from the penetration to varying depths and intensities, of abiotic and biotic conditions from the surrounding non-forest matrix into the forest interior. Although 70% of the world's forests are within 1 km of a forest edge, making edge effects a dominant feature of most forest habitats, there are few empirical data on inter-site differences in edge responses in primates. We used spatially explicit capture-recapture (SECR) models to determine spatial patterns of density for two species of mouse lemurs (Microcebus murinus and Microcebus ravelobensis) in two forest landscapes in northwestern Madagascar...
March 25, 2024: American Journal of Primatology
https://read.qxmd.com/read/38506254/interactions-with-humans-reduce-the-success-of-foraging-for-anthropogenic-food-by-capuchin-monkeys-sapajus-libidinosus-in-bras%C3%A3-lia-national-park-brazil
#3
JOURNAL ARTICLE
Murilo Reis Camargo, Túlio Costa Lousa, Ricardo Vasquez Mota, Francisco D C Mendes
The progressive growth of urban environments has increasingly forced populations of nonhuman primates to coexist with humans in many cities, which has resulted in problems such as behavioral alterations, conflicts with humans, and threats to the health of the monkeys, due to their consumption of anthropogenic foodstuffs. These anthropogenic foods, which are rich in calories, are the principal driver of the proximity between humans and primates, even though the acquisition of these foods tends to be risky for the monkeys and involve a variety of challenges derived from specific features of the urban environment...
March 20, 2024: American Journal of Primatology
https://read.qxmd.com/read/38482954/population-assessment-of-the-endangered-kashmir-gray-langur-semnopithecus-ajax-pocock-1928-using-the-double-observer-method
#4
JOURNAL ARTICLE
Shahid Hameed, Tawqir Bashir, Mohammad N Ali, Munib Khanyari, Ajith Kumar
Primates are among the most threatened taxa globally, therefore, there is a need to estimate and monitor their populations. Kashmir Gray Langur Semnopithecus ajax is an endangered species for which there is no population estimate. We used double-observer method to estimate its population size in the Kashmir region of North-Western Himalaya. We walked 1284 km across 31 survey blocks spanning all three divisions of Kashmir viz., North, Central, and South Kashmir, covering an area of 411 km2 . We counted a minimum of 1367 individual langurs from 27 groups...
March 14, 2024: American Journal of Primatology
https://read.qxmd.com/read/38482892/neutrophil-to-lymphocyte-ratio-in-captive-olive-baboons-papio-anubis-the-effects-of-age-sex-rearing-stress-and-pregnancy
#5
JOURNAL ARTICLE
Sarah J Neal, Angela M Achorn, Steven J Schapiro, William D Hopkins, Joe H Simmons
In apes and humans, neutrophil to lymphocyte ratio (NLR) can be used as a predictive indicator of a variety of clinical conditions, longevity, and physiological stress. In chimpanzees specifically, NLR systematically varies with age, rearing, sex, and premature death, indicating that NLR may be a useful diagnostic tool in assessing primate health. To date, just one very recent study has investigated NLR in old world monkeys and found lower NLR in males and nursery-reared individuals, as well as a negative relationship between NLR and disease outcomes...
March 14, 2024: American Journal of Primatology
https://read.qxmd.com/read/38475662/humans-homo-sapiens-but-not-baboons-papio-papio-demonstrate-crossmodal-pitch-luminance-correspondence
#6
JOURNAL ARTICLE
Konstantina Margiotoudi, Joel Fagot, Adrien Meguerditchian, Isabelle Dautriche
Humans spontaneously and consistently map information coming from different sensory modalities. Surprisingly, the phylogenetic origin of such cross-modal correspondences has been under-investigated. A notable exception is the study of Ludwig et al. (Visuoauditory mappings between high luminance and high pitch are shared by chimpanzees [Pan troglodytes] and humans. Proceedings of the National Academy of Sciences, 108(51), 20661-20665) which reports that both humans and chimpanzees spontaneously map high-pitched sounds with bright objects and low-pitched sounds with dark objects...
March 12, 2024: American Journal of Primatology
https://read.qxmd.com/read/38467494/consistency-in-verreaux-s-sifaka-home-range-and-core-area-size-despite-seasonal-variation-in-resource-availability-as-assessed-by-enhanced-vegetation-index-evi
#7
JOURNAL ARTICLE
Anne C Axel, Brynn M Harshbarger, Rebecca J Lewis, Stacey R Tecot
Primates are adept at dealing with fluctuating availability of resources and display a range of responses to minimize the effects of food scarcity. An important component of primate conservation is to understand how primates adapt their foraging and ranging patterns in response to fluctuating food resources. Animals optimize resource acquisition within the home range through the selection of resource-bearing patches and choose between contrasting foraging strategies (resource-maximizing vs. area-minimizing)...
March 11, 2024: American Journal of Primatology
https://read.qxmd.com/read/38467477/losing-lemurs-declining-populations-and-land-cover-changes-over-space-and-time
#8
JOURNAL ARTICLE
Pamela R Narváez-Torres, Nicola K Guthrie, Typhenn A Brichieri-Colombi, Cressant P Razafindravelo, Zachary S Jacobson, Fredo Tera, Daniel V Rafidimanana, Zé-Elinah Rahasivelo, Melody A Petersen, Hasinala Ramangason, Lea Randall, Jana M McPherson, Cynthia L Frasier, Axel Moehrenschlager, Sheila M Holmes, Edward E Louis, Steig E Johnson
Forest loss and degradation due to land cover changes imperil biodiversity worldwide. Subtropical and tropical ecosystems experience high deforestation rates, negatively affecting species like primates. Madagascar's endemic lemurs face exceptionally high risks of population declines and extirpation. We examined how short-term land cover changes within a fragmented landscape in southeastern Madagascar impacted the density of lemur species. Using line transects, we assessed density changes in nine lemur species across five forest fragments...
March 11, 2024: American Journal of Primatology
https://read.qxmd.com/read/38462743/measuring-mantled-howler-monkey-alouatta-palliata-testes-via-parallel-laser-photogrammetry-expanding-the-use-of-noninvasive-methods
#9
JOURNAL ARTICLE
Austen J Ehrie, Alec A Iruri-Tucker, Yasmin B Lord, Heidi G Williamson, Kevin D Hunt, P David Polly, Courtney L Fitzpatrick, Michael D Wasserman
Parallel laser photogrammetry (PLP), which consists of attaching two or three parallel laser beams at a known inter-beam distance to a camera, can be used to collect morphological measurements of organisms noninvasively. The lasers project onto the photo being taken, and because the inter-beam distance is known, they act as a scale for image analysis programs like ImageJ. Traditionally, this method has been used to measure larger morphological traits (e.g., limb length, crown-rump length) to serve as proxies for overall body size, whereas applications to smaller anatomical features remain limited...
March 10, 2024: American Journal of Primatology
https://read.qxmd.com/read/38433290/behavioral-thermoregulation-in-primates-a-review-of-literature-and-future-avenues
#10
REVIEW
Cynthia L Thompson, Emily A Hermann
Primates face severe challenges from climate change, with warming expected to increase animals' thermoregulatory demands. Primates have limited long-term options to cope with climate change, but possess a remarkable capacity for behavioral plasticity. This creates an urgency to better understand the behavioral mechanisms primates use to thermoregulate. While considerable information exists on primate behavioral thermoregulation, it is often scattered in the literature in a manner that is difficult to integrate...
March 3, 2024: American Journal of Primatology
https://read.qxmd.com/read/38425016/prosocial-or-photo-preferences-gorillas-prosocial-choices-using-a-touchscreen
#11
JOURNAL ARTICLE
Jennifer Vonk
Three male Western lowland gorillas (Gorilla gorilla gorilla) were given the opportunity to select their own or conspecific photos on a touchscreen to indicate whether they wished the experimenter to deliver a food reward only to them or to them and the selected conspecific(s). This is only the second symbolic test of prosocial preferences with apes using a touchscreen, and the first with gorillas. The use of self and other photographs as symbols of prosocial choices was intuitive while controlling for the distraction of visible food rewards, and allowing for tests of transfer to further validate apparent prosocial intentions...
February 29, 2024: American Journal of Primatology
https://read.qxmd.com/read/38409866/sniffing-behavior-of-semi-free-ranging-barbary-macaques-macaca-sylvanus
#12
JOURNAL ARTICLE
Miriam Simon, Anja Widdig, Brigitte M Weiß
Olfaction is one of the evolutionarily oldest senses and plays a fundamental role in foraging and social interactions across mammals. In primates, the role of olfaction is now well recognized, but better investigated in strepsirrhine and platyrrhine primates than in catarrhines. We observed the sniffing behavior of semi-free ranging Barbary macaques, Macaca sylvanus, at Affenberg Salem, Germany, to assess how frequently macaques sniff and in which contexts, and how sniffing is affected by sex and age. Focal observations of 24 males and 24 females aged 1-25 years showed that Barbary macaques sniffed, on average, 5...
February 26, 2024: American Journal of Primatology
https://read.qxmd.com/read/38409820/dietary-flexibility-of-the-greater-bamboo-lemur-prolemur-simus-a-specialized-feeder-in-eastern-madagascar
#13
JOURNAL ARTICLE
T Hasimija Mihaminekena, Ando N Rakotonanahary, Cynthia L Frasier, Hery N T Randriahaingo, Timothy M Sefczek, Jen Tinsman, H Lucien Randrianarimanana, Maholy Ravaloharimanitra, Toky Hery Rakotoarinivo, Jonah Ratsimbazafy, Tony King, Edward E Louis
The degree of dietary flexibility in primates is species specific; some incorporate a wider array of resources than others. Extreme interannual weather variability in Madagascar results in seasonal resource scarcity which has been linked to specialized behaviors in lemurs. Prolemur simus, for example, has been considered an obligate specialist on large culm bamboo with >60% of its diet composed of woody bamboos requiring morphological and physiological adaptations to process. Recent studies reported an ever-expanding list of dietary items, suggesting that this species may not be an obligate specialist...
February 26, 2024: American Journal of Primatology
https://read.qxmd.com/read/38402143/edge-effects-and-social-behavior-in-three-platyrrhines
#14
JOURNAL ARTICLE
Laura M Bolt, Jenna L Owens, Madison Taylor Grant, Elizabeth M C Coggeshall, Dorian G Russell, Carrie Merrigan-Johnson, Zachary S Jacobson, Zachary T Schmidt, Francesca V E Kaser, Amy L Schreier
Social behavior is a key adaptation for group-living primates. It is important to assess changes to social behavior in human-impacted landscape zones to better understand the impact of anthropogenic disturbance on primate species. We investigated social behavior rate and type in three species of platyrrhines across 100 m anthropogenic edge and interior zones of a fragmented forest in Costa Rica, La Suerte Biological Research Station (LSBRS). Following results from other sites, we predicted that spider monkeys (Ateles geoffroyi), capuchin monkeys (Cebus imitator) and howler monkeys (Alouatta palliata) would show lower rates and fewer types of social behavior in forest edge compared to interior...
February 24, 2024: American Journal of Primatology
https://read.qxmd.com/read/38369692/rapid-facial-mimicry-in-platyrrhini-play-face-replication-in-spider-monkeys-ateles-fusciceps-ateles-hybridus-and%C3%A2-ateles%C3%A2-paniscus
#15
JOURNAL ARTICLE
Giada Cordoni, Annalisa Ciantia, Jean-Pascal Guéry, Baptiste Mulot, Ivan Norscia
Rapid facial mimicry (RFM), the rapid and automatic replication of facial expression perceived, is considered a basic form of empathy and was investigated mainly during play. RFM occurs in Catarrhini (Old World primates), but it is not still demonstrated in Platyrrhini (New World primates). For this reason, we collected video data on playful interactions (Nplay_interactions  = 149) in three species of spider monkeys (Ateles fusciceps-N = 11, Ateles hybridus-N = 14, and Ateles paniscus-N = 6) housed at La Vallée des Singes and the ZooParc de Beauval (France)...
February 18, 2024: American Journal of Primatology
https://read.qxmd.com/read/38353023/stubby-versus-stabby-a-preliminary-analysis-of-canine-microwear-in-primates-implication-for-inferring-ingestive-behaviors
#16
JOURNAL ARTICLE
Putu Pujiantari, Lucas K Delezene, J Michael Plavcan, Mark F Teaford, Peter S Ungar
Molar and incisor microwear reflect aspects of food choice and ingestive behaviors in living primates and have both been used to infer the same for fossil samples. Canine microwear, however, has received less attention, perhaps because of the prominent role canines play in social display and because they are used as weapons-while outside of a few specialized cases, their involvement in diet related behaviors has not been obvious. Here, we posit that microwear can also provide glimpses into canine tooth use in ingestion...
February 14, 2024: American Journal of Primatology
https://read.qxmd.com/read/38342984/excess-prenatal-loss-and-respiratory-illnesses-of-infant-macaques-living-outdoors-and-exposed-to-wildfire-smoke
#17
JOURNAL ARTICLE
Kathryn Berns, Andrew J Haertel
Global climate change has transformed predictions of fire seasons in the near future, and record-breaking wildfire events have had catastrophic consequences in recent years. In September 2020, multiple wildfires subjected Oregon to hazardous air quality for several days. In this retrospective cohort study, we aimed to examine prenatal loss, morbidity, and mortality of rhesus (Macaca mulatta) and Japanese macaques (Macaca fuscata) exposed to poor air quality from the nearby wildfires. Detailed medical records from 2014 to 2020 of 580 macaques housed outdoors at a research facility in Beaverton, Oregon were used to evaluate the association between these health outcomes and wildfire smoke exposure...
February 11, 2024: American Journal of Primatology
https://read.qxmd.com/read/38340360/pied-tamarins-change-their-vocal-behavior-in-response-to-noise-levels-in-the-largest-city-in-the-amazon
#18
JOURNAL ARTICLE
Tainara Venturini Sobroza, Marcelo Gordo, Jacob C Dunn, Pedro Aurélio Costa Lima Pequeno, Bruna Mendel Naissinger, Adrian Paul Ashton Barnett
Many animal species depend on sound to communicate with conspecifics. However, human-generated (anthropogenic) noise may mask acoustic signals and so disrupt behavior. Animals may use various strategies to circumvent this, including shifts in the timing of vocal activity and changes to the acoustic parameters of their calls. We tested whether pied tamarins (Saguinus bicolor) adjust their vocal behavior in response to city noise. We predicted that both the probability of occurrence and the number of long calls would increase in response to anthropogenic noise and that pied tamarins would temporally shift their vocal activity to avoid noisier periods...
February 10, 2024: American Journal of Primatology
https://read.qxmd.com/read/38332495/correction-to-leopard%C3%A2-predation-on-gelada-monkeys-at-guassa-ethiopia
#19
(no author information available yet)
No abstract text is available yet for this article.
February 8, 2024: American Journal of Primatology
https://read.qxmd.com/read/38299312/manual-preference-performance-and-dexterity-for-bimanual-grass-feeding-behavior-in-wild-geladas-theropithecus-gelada
#20
JOURNAL ARTICLE
Valentina Truppa, Marco Gamba, Roberta Togliatto, Marta Caselli, Anna Zanoli, Elisabetta Palagi, Ivan Norscia
We assessed whether wild geladas, highly specialized terrestrial grass eaters, are lateralized for bimanual grass-plucking behavior. According to the literature, we expected that complex motor movements in grass feeding would favor the emergence of a population-level hand bias in these primates. In addition, we described geladas' manual behavior based on systematic observations of several individuals. Our study group included 28 individuals belonging to a population of free-ranging geladas frequenting the Kundi plateau, Ethiopia...
February 1, 2024: American Journal of Primatology
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