Publications

social play among black and gold howler monkey (alouatta caraya) immatures during intergroup encounters.	we studied intergroup social play (igsp) among immatures in wild black and gold howler monkeys (alouatta caraya) in northeastern argentina. igsp events are one form of affiliative interaction that can occur during intergroup encounters. the main goal of this study was to analyze igsp in a. caraya immatures and assess how intrinsic (e.g., age and sex) and extrinsic (e.g., seasonality) factors can influence the development of this type of social behavior. we followed 12 groups between 2008 and 201 ...	2018	30152540
detection and prevalence of adenoviruses from free-ranging black howler monkeys (alouatta pigra).	adenoviruses are important pathogens known to infect vertebrate hosts, including a wide range of primates. despite its importance, data on the diversity of these viruses in non-human primates living in their natural habitat remain scarce. in this study, we conducted a surveillance of adenoviral infection in wild black howler monkeys from two protected natural areas in mexico. this was achieved by analyzing 67 fecal samples using a nested pcr that targets the adenovirus dna polymerase gene. adeno ...	2018	30238313
births during 7 years after the translocation of a pair of black-and-gold howler monkeys (alouatta caraya) to a forest fragment in southeast brazil.	fecundity in female primates is influenced by the nutritional condition. if when translocated howler monkeys exhibit the same breeding patterns as non-translocated members of the same genus, it is an indication that the translocated monkeys have become well adapted to their release site and that they are likely in good nutritional condition. the objective of this study was therefore to investigate this pattern by recording copulations (over 5 years) and births (over 7 years) after the translocat ...	2018	30238425
atlantic-primates: a dataset of communities and occurrences of primates in the atlantic forests of south america.	primates play an important role in ecosystem functioning and offer critical insights into human evolution, biology, behavior, and emerging infectious diseases. there are 26 primate species in the atlantic forests of south america, 19 of them endemic. we compiled a dataset of 5,472 georeferenced locations of 26 native and 1 introduced primate species, as hybrids in the genera callithrix and alouatta. the dataset includes 700 primate communities, 8,121 single species occurrences and 714 estimates ...	2019	30317556
molecular detection of bifidobacterium spp. in faeces of black howler monkeys (alouatta pigra).	bifidobacterium genus are considered to be beneficial bacteria for their hosts; however, knowledge about the specific species that are part of the gut microbiome of howler monkeys is scarce. polymerase chain reaction (pcr) is a useful technique for the identification of non-cultivable or difficult to grow bacterial species. with the goal of detecting species of the genus bifidobacterium in black howler monkeys, we used pcr on dna derived from faecal samples.	2019	30520095
phlebotominae in peri-domestic and forest environments inhabited by alouatta caraya in northeastern argentina.	multiple species of phlebotominae are vectors of leishmania (protozoa: trypanosomatidae), which causes visceral leishmaniasis (vl) and cutaneous leishmaniasis (cl). to describe the phlebotominae (diptera: psychodidae) related to the environments of black and gold howler monkeys alouatta caraya (humbodlt, 1812) (primates: atelidae), potential vectors were sampled in different landscapes and vertical strata of sleeping trees. phlebotomine captured between december 2011 and march 2012 (2365 individ ...	2019	30895653
detection of antibodies against icoaraci, ilhéus, and saint louis encephalitis arboviruses during yellow fever monitoring surveillance in non-human primates (alouatta caraya) in southern brazil.	free-ranging non-human primates (nhps) can host a variety of pathogenic microorganisms, such as arboviruses, which include the yellow fever virus (yfv). this study aimed to detect the circulation of yf and other arboviruses in three wild alouatta caraya populations in forests in southern brazil.	2019	31032984
sperm morphology in neotropical primates.	the morphological and morphometric characterization of spermatozoa has been used as a taxonomic and phylogenetic tool for different species of mammals. we evaluated and compared the sperm morphometry of five neotropical primate species: alouatta caraya, ateles belzebuth and ateles chamek of family atelidae; and cebus cay (=sapajus cay) and cebus nigritus (=sapajus nigritus) of family cebidae. after the collection of semen samples, the following parameters were measured on 100 spermatozoa from ea ...	2019	31640171
adoption of an orphaned and temporarily captive infant by an unrelated adult female in black-and-gold howler monkey: implications for management strategies.	conservation behavior involves the application of general principles of animal behavior for solving conservation problems. in primates, adoption of infants has been reported in several species and consists of an individual other than the biological parents taking primary care of them. based on cases of adoption reported in howler monkeys (genus alouatta), in the present study we facilitated the adoption of an orphaned and temporarily captive male infant by an unrelated adult female black-and-gol ...	2020	31832889
spatial aggregation of fruits explains food selection in a neotropical primate (alouatta pigra).	the availability and spatial distribution of food resources affect animal behavior and survival. black howler monkeys (alouatta pigra) have a foraging strategy to balance their nutrient intake that involves mixing their consumption of leaves and fruits. the spatial aggregation of food items should impact this strategy, but how it does so is largely unknown. we quantified how leaf and fruit intake combined (here termed food set selection) was spatially aggregated in patches and how food aggregati ...	2019	31857630
arboreal route navigation in a neotropical mammal: energetic implications associated with tree monitoring and landscape attributes.	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 of food resources, which might reduce the cognitive load and as such facilitate the process of movement decision-making. similarly, locating routes in areas that avoid costly landscape attributes will enhance their overall energy balance. in this study we determined the benefits of route navigation ...	2019	31890215
grooming in brown howler monkeys, alouatta fusca.	the grooming behavior of a group of brown howler monkeys was studied for one year in an atlantic forest reserve of southeastern brazil. a total of 290 grooming bouts were recorded and analyzed. the two adult females directed most of the grooming (91%), while the adult male was the major recipient (37%). grooming between females, and between them and their siblings, also occurred quite often. on average, the group spent 2% of its daily time grooming, with a higher frequency around noon. there wer ...	1995	31924059
prometaphase chromosomes of the howler monkey (aloutta caraya): g, c, nor, and restriction enzyme (res) banding.	prometaphase lymphocyte chromosomes from eight adult argentinian alouatta caraya females were characterized using sequential g-c banding techniques, ag-nor bands and bands obtained with the restriction enzymes hae iii, eco ri, alu i and sau 3a. the cytogenetic analysis showed 2n = 52, with four, five, or six nor chromosomes. digestion with hae iii and eco ri produced g-like-bands. centromere regions and two interstitial c-bands (in chromosomes number 16 and 21) showed intraindividual or interind ...	1994	31936930
germination of native and exotic seeds dispersed by wild black-and-gold howler monkeys (alouatta caraya): assessing deinhibition and scarification effects.	fruit ingestion by frugivores and the subsequent passage of seeds through their digestive tract can influence seed germination patterns. the removal of germination inhibitors contained in the fruit pulp (deinhibition effect), and/or the abrasion of the seed coat (scarification effect), can modify the probability and speed of seed germination. we followed seven groups of black-and-gold howler monkeys (alouatta caraya) in northeastern argentina between november 2012 and january 2013 to study the e ...	2020	31950320
alouatta caraya: population density and demography in northern argentina.	a long-term study was carried out on a black howler monkey (alouatta caraya) population living in 150 ha of forest patches spread out in a 3,000 ha rural area in northern argentina. a total of 22 different groups were located between 1980 and 1984 and 11 of these were monitored regularly during 28 months. ecological density varied between 12.14 and 12.93 groups per sq km of thall dense forest (0.80 to 1.15 ind./ha; biomass 306 to 365 kg/sq km). solitaries and small associations of adult or subad ...	1990	31963967
evidence-based conservation education in mexican communities: connecting arts and science.	several studies suggest that 63% of primate species are currently threatened due to deforestation, pet-trade, and bushmeat hunting. successful primate conservation strategies require effective educational programs capable of enhancing critical system-thinking and responsible behavior towards these species. arts-based conservation education can simultaneously foster cognitive and emotional processes. in this paper, we evaluate an arts-based educational program focused on the conservation of black ...	2020	32017779
morphological and molecular characterization of bertiella sp. (cestoda, anoplocephalidae) infection in a human and howler monkeys in argentina.	bertiella sp. is a typical parasite in non-human primates and only a few cases of bertiellosis have been reported in humans. we present a new case study of bertiellosis in a 42-year-old woman caretaker of howler monkeys in a wild rehabilitation center in argentina. bertiella sp. infection was also diagnosed in the monkeys. proglottids and feces were collected from the caretaker and monkeys; the samples were submitted for parasitological examination by morphological characterization and molecular ...	2020	32025808
isotopic niche partitioning in two sympatric howler monkey species.	ecological similarity between species can lead to interspecific trophic competition. however, when ecologically similar species coexist, they may differ in foraging strategies and habitat use, which can lead to niche partitioning. as the body tissues of consumers contain a stable isotope signature that reflects the isotopic composition of their diet, stable isotope analysis is a useful tool to study feeding behavior. we measured the isotopic niche width, which is a proxy for trophic niche width, ...	2020	32091131
genetic assignment of illegally trafficked neotropical primates and implications for reintroduction programs.	the black and gold howler monkey (alouatta caraya) is a neotropical primate threatened by habitat loss and capture for illegal trade in argentina. using multilocus microsatellite genotypes from 178 a. caraya individuals sampled from 15 localities in argentina, we built a genotype reference database (grdb). bayesian assignment methods applied to the grdb allowed us to correctly re-assign 73% of individuals to their true location of origin and 93.3% to their cluster of origin. we used the grdb to ...	2020	32111905
a study of a black howling monkey (alouatta caraya) population in northern argentina.	a population of alouatta caraya in northern argentina had an ecological density of 130 animals per km2 . mean troop size varied from 7.2 to 8.9 individuals, and the ratio of adult males to adult females from 0.58 to 0.51. infants comprised from 6% to 14% of the population, juveniles from 16% to 21%. these percentages probably vary seasonally in response to a birth peak at the beginning of the dry season. males were age-graded in multi-male troops. sexual dimorphism was extreme in this species. m ...	1984	32160719
detection of antimicrobial resistance genes in escherichia coli isolated from black howler monkeys (alouatta pigra) and domestic animals in fragmented rain-forest areas in tabasco, mexico.	the appearance and spread of antimicrobial resistance (amr) in bacteria in natural environments and wildlife are related to agricultural and livestock activities and are a global health and conservation problem. we assessed the presence of amr genes in escherichia coli isolated from black howler monkeys (alouatta pigra), sheep (ovis aries), cattle (bos taurus), and horses (equus caballus) from a highly fragmented forest in southern mexico. fresh fecal samples were collected using swabs, seeded o ...	2020	32402234
molecular identification of leishmania in free-ranging black and gold howler monkeys (alouatta caraya) in northeastern argentina.	parasitological surveys of non-human primates provides an important opportunity to better understand the epidemiology, transmission dynamics and emergence risk of anthropozoonoses such as leishmaniasis, which affect human populations in several regions accross south america. our study area, in northeastern argentina, can be considered a southern marginal region for the presence of leishmaniases and includes the habitat of black and gold howler monkeys, alouatta caraya. to evaluate if a. caraya s ...	2020	32450135
bertiella sp. (meyner, 1895) infection of alouatta caraya (humboldt, 1812) in urban and natural environments in ñeembucú, southwest paraguay.	bertiella sp., a cestode known to infect a variety of hosts, including nonhuman primates and humans, was identified in paraguay as early as 1895, but no systematic analysis of wild primates' gastrointestinal parasites has ever been carried out in paraguay. increased urbanization in southwest paraguay has pushed the paraguayan howler monkey (alouatta caraya) into anthropogenic habitats, particularly in the city of pilar (ñeembucú department), giving rise to greater potential for zoonotic transmis ...	2020	32596875
demographic population structure of black howler monkeys in fragmented and continuous forest in chiapas, mexico: implications for conservation.	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 as habitat loss and fragmentation can cause ecological and behavioral changes in small, isolated populations, which may, over time, alter population density and demographic structure (age/sex classes and group composition) in fragment populations relative to continuous forest populat ...	2020	32602598
salivary proteome of a neotropical primate: potential roles in host defense and oral food perception.	saliva contains a very complex mixture of proteins for defense against microbiological pathogens and for oral food perception. howler monkeys are neotropical primates that can consume a mostly leaf diet. they are well known to thrive in highly disturbed habitats where they may cope with a diversity of dietary challenges and infection risks. we aimed to describe the salivary proteome of howlers to contribute to better understanding of their physiology.	2020	32765966
effects of variation in forest fragment habitat on black howler monkey demography in the unprotected landscape around palenque national park, mexico.	habitat loss and fragmentation are leading threats to biodiversity today, and primates are particularly vulnerable to anthropogenic habitat disturbance. however, few studies have examined how differential effects of variation in forest fragment characteristics on males and females in a primate population may affect demography and population persistence. we quantified the effects of variation in forest fragment characteristics on the within-fragment demography of black howler monkeys (alouatta pi ...	2020	32864215
molecular phylogenetic inference of the howler monkey radiation (primates: alouatta).	howler monkeys (alouatta), comprising between nine and 14 species and ranging from southern mexico to northern argentina, are the most widely distributed platyrrhines. previous phylogenetic studies of howlers have used chromosomal and morphological characters and a limited number of molecular markers; however, branching patterns conflict between studies or remain unresolved. we performed a new phylogenetic analysis of alouatta using both concatenated and coalescent-based species tree approaches ...	2020	32876810
coding-complete genome sequence of a yellow fever virus isolated from a baby howler monkey (alouatta caraya) from são paulo state, brazil, in 2016.	we report a coding-complete sequence of a yellow fever virus, strain jabspm02, containing the 3' untranslated region and all coding regions. the virus was recovered from an infected howler monkey from a rural area in são paulo state, brazil. our findings show that it belongs to the south america 1e genotype.	2021	33414341