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Long-tailed macaques are an edge species, preferring to live along the forest borders of many habitat types (Gumert, Chapter 1). The result of this preference is that long-tailed macaques are adaptable generalists that are frequently found along the edges of human settlements across Southeast Asia. Another consequence is that long-tailed macaques can adjust quickly to living with other species, and thus have commonly expanded beyond the edge to overlap with humans in numerous contexts (see Part II). Due to the close association with humans, macaque populations can be powerfully impacted by human activity. In some cases they have been carried and introduced to areas beyond their normal range (see Part III). The overlap of macaques and humans, and the consequences of this overlap, needs to be better understood. While the basis of our relationship with long-tailed macaques is becoming apparent, much more research will be needed to fully understand their population and the causes and consequences of our interface with them. This chapter is an attempt to focus future research in a few important areas that will be necessary for better understanding the population, ecology, and synanthropic nature of long-tailed macaques. This chapter focuses on three subject areas that warrant special consideration for future scientific research on M. fascicularis : population-level research, the issue of ethnophoresy and introduced populations, and the causes and consequences of human-macaque overlap. Directions for population-level research Long-tailed macaques perhaps have the greatest amount of intraspecific variation of any primate species (Fooden, 2006).

Long-tailed macaques (Macaca fascicularis) have a wide geographical distribution and extensively overlap with human societies across southeast Asia, regularly utilizing the edges of secondary forest and inhabiting numerous anthropogenic environments, including temple grounds, cities and farmlands. Yet despite their apparent ubiquity across the region, there are striking gaps in our understanding of long-tailed macaque population ecology. This timely volume, a key resource for primatologists, anthropologists and conservationists, underlines the urgent need for comprehensive population studies on common macaques. Providing the first detailed look at research on this underexplored species, it unveils what is currently known about the population of M. fascicularis, explores the contexts and consequences of human-macaque sympatry and discusses the innovative programs being initiated to resolve human-macaque conflict across Asia. Spread throughout the book are boxed case studies that supplement the chapters and give a valuable insight into specific field studies on wild M. fascicularis populations.