Primates as pets in Mexico City: an assessment of the species involved, source of origin, and general aspects of treatment

The large human populations in cities are an important source of demand for wildlife pets, including primates, and not much is known about the primate species involved in terms of their general origin, the length of time they are kept as pets, and some of the maintenance problems encountered with their use as pets. We report the results of a survey conducted in Mexico City among primate pet owners, which was aimed at providing some of the above information. We used an ethnographic approach, and pet owners were treated as informants to gain their trust so that we could enter their homes and learn about the life of their primate pets. We surveyed 179 owners of primate pets, which included 12 primate species. Of these, three were native species (Ateles geoffroyi, Alouatta pigra, and A. palliata). The rest were other neotropical primate species not native to Mexico, and some paleotropical species. Spider monkeys and two species of howler monkeys native to Mexico accounted for 67% and 15%, respectively, of the primate cases investigated. The most expensive primate pets were those imported from abroad, while the least expensive were the Mexican species. About 45% of the native primate pets were obtained by their owners in a large market in Mexico City, and the rest were obtained in southern Mexico. Although they can provide companionship for children and adults, primate pets are subject to a number of hazards, some of which put their lives at risk. The demand by city dwellers for primate pets, along with habitat destruction and fragmentation, exerts a significant pressure on wild populations in southern Mexico.     

Genetic characterization of parental cell lines and biochemical analysis of somatic cell hybrids between mouse (RAG) cells and fibroblasts of Ateles paniscus chamek (primates,platyrrhini)

Mouse (RAG) cells, (deficient in hypoxanthine-phosphoribosyl-transferase), and Ateles paniscus chamek primary fibroblasts were used in fusion experiments to generate somatic cell hybrids. Both parental cell lines were genetically characterized by karyological and biochemical analyses with 27 isozyme systems. These procedures were useful for monitoring primate chromosome segregation in somatic cell hybrids, for detecting chromosome rearrangements of primate chromosomes, and for identifying individual primate chromosomes. These characterizations are necessary to distinguish between different hybrid cell lines and to generate a panel for gene mapping studies. This is achieved by selecting cell lines that segregate different sets of relatively few primate isozymes and chromosomes. Conversely, we eliminated hybrid cell lines either showing: (1) rearrangements between primate and mouse chromosomes, (2) extensive rearrangements of primate chromosomes, or (3) a large number of primate biochemical markers. © 1993 Wiley-Liss, Inc.     

The primate palette: The evolution of primate coloration

Flip through The Pictorial Guide to the Living Primates¹ and you will notice a striking yet generally underappreciated aspect of primate biology: primates are extremely colorful. Primate skin and pelage coloration were highlighted examples in Darwin's² original discussions of sexual selection but, surprisingly, the topic has received little research attention since. Here we summarize the patterns of color variation observed across the primate order and examine the selective forces that might drive and maintain this aspect of primate phenotypic diversity. We discuss how primate color patterns might be adaptive for physiological function, crypsis, and communication. We also briefly summarize what is known about the genetic basis of primate pigmentation and argue that understanding the proximate mechanisms of primate coloration will be essential, not only for understanding the evolutionary forces shaping phenotypic variation, but also for clarifying primate taxonomies and conservation priorities.     

Cell-free systems for capsid assembly of primate lentiviruses from three different lineages

We recently demonstrated that capsids from three main primate lentiviral lineages appear to form via a pathway of assembly intermediates in primate cells. Retroviral capsid assembly intermediates were initially identified and characterized using a cell-free system for assembly of immature HIV-1 capsids. Because cell-free capsid assembly systems are useful tools, we are interested in developing such systems for other primate lentiviruses besides HIV-1. Here we extend previous cell-free studies by showing that Gag proteins of HIV-2, from a second primate lentiviral lineage, progress from early intermediates to late intermediates and completed capsids over time. Additionally, we demonstrate that Gag proteins of SIVagm, from a third primate lentiviral lineage, associate with the cellular factor HP68 and complete assembly in this system. Therefore, cell-free systems reproduce assembly of Gag from three main primate lentiviral lineages, and can be used to compare mechanistic features of capsid assembly of genetically divergent primate lentiviruses.     

Distribution and Diversity of Primates in Guyana: Species-Area Relationships and Riverine Barriers

Species-area relationships predict that there is a positive relationship between the number of species and the size of an area. It has been suggested that species richness will covary with area because larger areas have a greater diversity of habitats. Moreover, habitat diversity may operate in conjunction with riverine barriers to influence primate biogeography. Few studies have determined if and how these hypotheses relate to primate diversity in Guyana. To test these biogeographic hypotheses, I used data from 1,725 km of primate surveys I conducted in Guyana. I estimated geographic ranges for each of the 8 primate species via a GIS system. Geographic range size is a major determinant of the number of sightings of the 8 primate species. Primate species diversity is strongly negatively correlated with the number of rivers crossed moving in a clockwise pattern from eastern to NW Guyana. Interfluvial and habitat areas influence primate species diversity in Guyana. However, my data on primate biogeography in Guyana do not support the hypothesis that habitat diversity within the interfluvial areas effects primate diversity. Although the species-area relationship is considered the closest thing to a rule in ecology, researchers should be wary of too readily applying and accepting the model at all scales in biogeographic studies.     

Spatial Overlap Between People and Non-human Primates in a Fragmented Landscape

In western Uganda, the landscape surrounding Kibale National Park (KNP) contains households, trading centers, roads, fields, and forest fragments. The mosaic arrangement of these landscape features is thought to enhance human–primate interaction, leading to primate population declines and increased bi-directional disease transmission. Using a social–ecological systems research framework that captures the complexity of interaction among people, wildlife, and environment, we studied five forest fragments near KNP and conducted intensive on-the-ground mapping to identify locations of human–primate spatial overlap. Primate locations and human activities were distributed within, on the edges, and far beyond fragment borders. Analysis of shared spaces indicated that 5.5% of human space overlapped with primate spaces, while 69.5% of primate spaces overlapped with human spaces. Nearest neighbor analysis indicated that human activities were significantly spatially clustered within and around individual fragments, as were primate locations. Getis–Ord statistics revealed statistically significant “hotspots” of human activity and primate activity, but only one location where spatial overlap between humans and primates was statistically significant. Human activities associated with collecting fuelwood and other forest products were the primary drivers of human–primate overlap; however, primates also spent time outside of forest fragments in agricultural spaces. These results demonstrate that fragmented landscapes are not uniform with respect to human–primate overlap, and that the implications of human–primate interaction, such as primate population declines and possible cross-species disease transmission, are spatially aggregated.     

A molecular phylogeny of living primates

Comparative genomic analyses of primates offer considerable potential to define and understand the processes that mold, shape, and transform the human genome. However, primate taxonomy is both complex and controversial, with marginal unifying consensus of the evolutionary hierarchy of extant primate species. Here we provide new genomic sequence (~8 Mb) from 186 primates representing 61 (~90%) of the described genera, and we include outgroup species from Dermoptera, Scandentia, and Lagomorpha. The resultant phylogeny is exceptionally robust and illuminates events in primate evolution from ancient to recent, clarifying numerous taxonomic controversies and providing new data on human evolution. Ongoing speciation, reticulate evolution, ancient relic lineages, unequal rates of evolution, and disparate distributions of insertions/deletions among the reconstructed primate lineages are uncovered. Our resolution of the primate phylogeny provides an essential evolutionary framework with far-reaching applications including: human selection and adaptation, global emergence of zoonotic diseases, mammalian comparative genomics, primate taxonomy, and conservation of endangered species.     

Vegetative predictors of primate abundance: utility and limitations of a fine-scale analysis

Determining ecological predictors of primate abundance is important for both theoretical and applied conservation management. For forest primates, research has focused on comparisons of primate abundance and vegetation in different forest blocks or forest compartments with different management histories. However, great variation in primate abundance often occurs within single forests, especially in mountainous areas or in areas with habitat mosaics due to past disturbance. Here we assess, for the first time, the usefulness and limitations of small-scale, within-transect analysis of vegetative parameters as predictors of primate abundance in a very heterogeneous forest habitat in the Udzungwa Mountains of Tanzania. Relative abundance of four species of diurnal primates was recorded over a period of 2.5 years by walking three census transects 48 times each. Tree size, density, species composition, and food plants were measured along the same census lines. The fine-scale relationship between primate abundance and vegetative variables was analyzed through generalized linear modeling applied to 58 segments of these three census lines. Each segment was 200 m in length. For all four primate species, we found significant associations between their abundance and selected vegetative variables. The abundance of the endemic and endangered Udzungwa red colobus Procolobus gordonorum was positively related to mean basal area of large trees (diameter at breast height greater than 20 cm) and to the species richness of their food plants. Considering the very great variation in primate abundance that was recorded among segments of the census lines, our approach proved useful in predicting the relationship between primate abundance and small-scale habitat differences. The main limitation of this study, however, was the relatively low-predictive power of the models for some species, especially the Angolan colobus Colobus angolensis. We discuss the potential reasons for this problem and suggest possible improvements for future studies.     

Distinguished primatologist address—moving from advocacy to activism: Changing views of primate field research and conservation over the past 40 years

Field studies of wild nonhuman primates have grown exponentially over the past 40 years and our knowledge of primate behavior, ecology, and social, and mating systems has expanded greatly. However, we are facing a major extinction crisis with some 60% of all primate species listed as threatened and more than 75% of species with declining populations. The primary factor driving primate population decline is human population increase, which over the past 50 years has resulted in the unsustainable conversion and degradation of natural landscapes for industrial agriculture, the production of nonagricultural commodities for international trade, pastureland for cattle, dam construction, fossil fuel exploration, mining, and the construction of road networks and infrastructure to support large urban centers. Recent ecological modeling predicts that by the end of the century, the four primate‐richest countries in the world will lose 32–78% of their existing primate habitat to agricultural expansion, and nine of the top 15 primate‐richest countries are expected to have 80–100% of their primate species extinct or threatened with extinction. If we are going to save the world's primates, the time to act is now! Not only should all primate field research include a strong conservation component, but in addition we must actively join with our professional societies, zoos and research facilities, universities, conservation organizations, concerned business leaders, global citizens, like‐minded political leaders, and grassroots organizations to inform, demand and direct governments, multinational corporations, and international organizations to engage in transformational change to protect biodiversity and seek environmental justice against those entities that actively destroy our planet. As the chief academic discipline dedicated to the study of primates, we must organize and collectively move from being advocates for primate conservation to becoming activists for primate conservation. This is a call to action.     

Celebrating a life by recognizing realities

This special issue on nonhuman primate behavior and welfare, the proceedings of a special Animal Behavior Society session, celebrates the life of Dr. Sylvia Taylor (1963-2005). Sylvia's premature death reminded her friends to recognize the reality that life is short, but one can make the most of it. Many individuals and organizations have also recognized the reality that an educational venture such as this one requires adequate funding and support. Their generosity has made this undertaking a success. The idea behind the session was to recognize the reality that one cannot ensure nonhuman animal welfare without understanding animal behavior, and to explore the ways in which this principle applies to primates. One must also recognize the reality that nonhuman primate welfare depends on understanding the behavior of the human primate as well as the nonhuman primate. Ensuring the welfare of the nonhuman primate sometimes requires educating and motivating the human primate. This special issue will hopefully provide helpful information to increase the reader's knowledge of primate behavior and welfare and to help the reader educate others on these important topics.     

Primates got personality,too: Toward an integrative primatology of consistent individual differences in behavior

In recent years, research on animal personality has exploded within the field of behavioral ecology. Consistent individual differences in behavior exist in a wide range of species, and these differences can have fitness consequences and influence several aspects of a species' ecology. In comparison to studies of other animals, however, there has been relatively little research on the behavioral ecology of primate personality. This is surprising given the large body of research within psychology and biomedicine showing that primate personality traits are heritable and linked to health and life history outcomes. In this article, I bring together theoretical perspectives on the ecology and evolution of animal personality with an integrative review of what we know about primate personality from studies conducted on captive, free‐ranging, and wild primates. Incorporating frameworks that emphasize consistency in behavior into primate behavioral ecology research holds promise for improving our understanding of primate behavioral evolution.     

Unlike fellows – a review of primate–non‐primate associations

Throughout many regions of the tropics, non‐primate animals – mainly birds and mammals – have been observed to follow primate groups and to exploit dropped food and flushed prey. The anecdotal nature of most of the numerous reports on these primate–non‐primate associations (PNPAs) may obscure the biological significance of such associations. We review the existing literature and test predictions concerning the influence of primate traits (body size, activity patterns, dietary strategies, habitat, group size) on the occurrence of PNPAs. Furthermore, we examine the influence of non‐primates' dietary strategies on the occurrence of PNPAs, and the distribution of benefits and costs. We detected a strong signal in the geographic distribution of PNPAs, with a larger number of such associations in the Neotropics compared to Africa and Asia. Madagascar lacks PNPAs altogether. Primate body size, activity patterns, habitat and dietary strategies as well as non‐primate dietary strategies affect the occurrence of PNPAs, while primate group size did not play a role. Benefits are asymmetrically distributed and mainly accrue to non‐primates. They consist of foraging benefits through the consumption of dropped leaves and fruits and flushed prey, and anti‐predation benefits through eavesdropping on primate alarm calls and vigilance. Where quantitative information is available, it has been shown that benefits for non‐primates can be substantial. The majority of PNPAs can thus be categorized as cases of commensalism, while mutualism is very rare. Our review provides evidence that the ecological function of primates extends beyond their manifold interactions with plants, but may remain underestimated.     

The expanded cattle <Emphasis Type="Italic">KIR</Emphasis> genes are orthologous to the conserved single-copy <Emphasis Type="Italic">KIR3DX1</Emphasis> gene of primates

Cattle are the only non-primate species for which expansion of the killer cell immunoglobulin-like receptor (KIR) genes has been reported. We analyzed cattle KIR sequences to determine their relationship to the two divergent lineages of primate KIR: one comprising the KIR3DX1 gene of unknown function, the second comprising all other primate KIR genes, which encode variable major histocompatibility complex class I receptors. Phylogenetics and analysis of repetitive elements shows that cattle KIR subdivide into the same two lineages as primate KIR. Unlike the primates, the lineage of variable and likely functional cattle KIR corresponds to the KIR3DX1 lineage of primate KIR, whereas the variable lineage of primate KIR is represented in cattle by one KIR gene and a related gene fragment.     

Primate phylogeny: molecular evidence from retroposons

In these postgenomic times where aspects of functional genetics and character evolution form a focal point of human-mouse comparative research, primate phylogenetic research gained a widespread interest in evolutionary biology. Nevertheless, it also remains a controversial subject. Despite the surge in available primate sequences and corresponding phylogenetic interpretations, primate origins as well as several branching events in primate divergence are far from settled. The analysis of SINEs - short interspersed elements - as molecular cladistic markers represents a particularly interesting complement to sequence data. The following summarizes and discusses potential applications of this new approach in molecular phylogeny and outlines main results obtained with SINEs in the context of primate evolutionary research. Another molecular cladistic marker linking the tarsier with the anthropoid primates is also presented. This eliminates any possibility of confounding phylogenetic interpretations through lineage sorting phenomena and makes use of a new point of view in settling the phylogenetic relationships of the primate infraorders.     

灵长类卵母细胞体外发育潜能的调控

灵长类卵母细胞细胞质成熟调控研究较为滞后,使得体外成熟的灵长类卵母细胞的胚胎发育潜能十发低下。提高其潜能对治疗人类不育症有重要的应用价值,并可推动灵长类胚胎发育的研究。基于猕猴卵母细胞质成熟调控研究,讨论了无血清成熟培养基中雌激素和孕激素、能量物质、氨基酸对卵母细胞质成熟的影响,以及动物年龄和生殖周期与发育潜能的关系。从分子水平进一步解释这些因素的作用,阐明卵母细胞质成熟的机理将是今后工作的方向。     

Use of keyed character string data structures and operators in models of primate groups

Many primate populations exhibit forms of organization that are both complex and highly dynamic. A prototype of a general purpose primate population computer modelling system has been developed; this modelling system provides data structures and operators that facilitate computer representation of many static and dynamic features of primate population organization. In this system, primate group structures are represented by text strings known as key strings. A key string begins with a label or key character that identifies its population element type. The label character is followed by data fields contained between bounds marker characters. Nested key strings can be used to concisely represent many of the structural features of social groups in different primate species. Changes in group structures are accomplished by key string insertion, deletion and move operations. Models of structures and processes in island, rhesus monkey and hamadryas baboon populations built with this prototype modelling system are discussed. In these pilot applications, use of key string data structures and operators greatly simplifies many aspects of model construction.     

Celebrating a Life by Recognizing Realities

This special issue on nonhuman primate behavior and welfare, the proceedings of a special Animal Behavior Society session, celebrates the life of Dr. Sylvia Taylor (1963-2005). Sylvia's premature death reminded her friends to recognize the reality that life is short, but one can make the most of it. Many individuals and organizations have also recognized the reality that an educational venture such as this one requires adequate funding and support. Their generosity has made this undertaking a success. The idea behind the session was to recognize the reality that one cannot ensure nonhuman animal welfare without understanding animal behavior, and to explore the ways in which this principle applies to primates. One must also recognize the reality that nonhuman primate welfare depends on understanding the behavior of the human primate as well as the nonhuman primate. Ensuring the welfare of the nonhuman primate sometimes requires educating and motivating the human primate. This special issue will hopefully provide helpful information to increase the reader's knowledge of primate behavior and welfare and to help the reader educate others on these important topics.     

树突状细胞在AIDS灵长类动物模型疾病进程中的作用

非人灵长类动物模型在艾滋病(AIDS)发病机制、传播途径、疫苗和药物等方面的研究中具有重要作用。树突状细胞(DC)作为最重要连接先天免疫与获得性免疫的抗原递呈细胞,在AIDS发病进程中扮演着重要的角色。研究非人灵长类AIDS动物模型中DC亚群数量、表型以及功能的变化,对揭示AIDS发病机制具有十分重要的意义。该文将重点总结近些年来DC亚群在AIDS动物模型发病机制中的作用研究进展,为以后的研究提供思路。     

Canine size, shape, and bending strength in primates and carnivores

Anthropoid primates are well known for their highly sexually dimorphic canine teeth, with males possessing canines that are up to 400% taller than those of females. Primate canine dimorphism has been extensively documented, with a consensus that large male primate canines serve as weapons for intrasexual competition, and some evidence that large female canines in some species may likewise function as weapons. However, apart from speculation that very tall male canines may be relatively weak and that seed predators have strong canines, the functional significance of primate canine shape has not been explored. Because carnivore canine shape and size are associated with killing style, this group provides a useful comparative baseline for primates. We evaluate primate maxillary canine tooth size, shape and relative bending strength against body size, skull size, and behavioral and demographic measures of male competition and sexual selection, and compare them to those of carnivores. We demonstrate that, relative to skull length and body mass, primate male canines are on average as large as or larger than those of similar sized carnivores. The range of primate female canine sizes embraces that of carnivores. Male and female primate canines are generally as strong as or stronger than those of carnivores. Although we find that seed-eating primates have relatively strong canines, we find no clear relationship between male primate canine strength and demographic or behavioral estimates of male competition or sexual selection, in spite of a strong relationship between these measures and canine crown height. This suggests either that most primate canines are selected to be very strong regardless of variation in behavior, or that primate canine shape is inherently strong enough to accommodate changes in crown height without compromising canine function.