Immaturity in spider monkeys: a risky business

Vick, Laura G.

doi:10.1017/cbo9780511721915.011

Cited by 47 publications

(79 citation statements)

References 75 publications

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“…Their high degree of fission-fusion sociality allows large groups to disperse widely in the pursuit of high-energy ripe fruit, whilst minimizing intragroup feeding competition [Symington, 1988[Symington, , 2000Asensio et al, 2008;Link et al, 2012]. Spider monkeys have long interbirth intervals ( ∼ 36 months [Shimooka et al, 2008, Vick, 2008). As a result of deforestation and fragmentation, populations have declined in a number of Ateles spp., and many populations are now limited to forest fragments and degraded habitats [Ramos-Fernández and Ayala-Orozco, 2002;Ramos-Fernández and Wallace, 2008;Rangel-Negrín et al, 2009;Link et al, 2010;Abondano and Link, 2012;Rimbach et al, 2012].…”

Section: Study Systemmentioning

confidence: 99%

Effects of Fragment and Vegetation Structure on the Population Abundance of Ateles hybridus, Alouatta seniculus and Cebus albifrons in Magdalena Valley, Colombia

Marsh

Link

King‐Bailey³

et al. 2016

IJFP

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Many primate species currently subsist in fragmented and anthropogenically disturbed habitats. Different threats arise depending on the species' life history strategy, dietary requirements and habitat preference. Additionally, anthropogenic disturbance is far from uniform and may affect individual forest fragments in a single landscape in differing ways. We studied the effects of fragmentation on three species of diurnal primate, Cebus albifrons, Alouatta seniculus and Ateles hybridus, in Magdalena Valley, Colombia. We tested the assumption that generalist species are more resilient than specialist species to habitat degradation by examining the fragments' vegetation and spatial structure and how these affected primate presence and abundance patterns. We found C. albifrons, a generalist, to be the most abundant species in 9 of 10 forest fragments, regardless of the level of habitat disturbance. A. hybridus, a large-bodied primate with a specialist diet, was either absent or low in abundance in fragments that had experienced recent disturbances and was found only in higher-quality fragments, regardless of the fragment size. A. seniculus, a species considered to have a highly flexible diet and the ability to survive in degraded habitat, was found in intermediate abundances between those of Cebus spp. and Ateles spp., and was more frequently found in high-quality fragments.

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Section: Study Systemmentioning

confidence: 99%

Effects of Fragment and Vegetation Structure on the Population Abundance of Ateles hybridus, Alouatta seniculus and Cebus albifrons in Magdalena Valley, Colombia

Marsh

Link

King‐Bailey³

et al. 2016

IJFP

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“…Thus, all community members were well habituated to the presence of observers and were individually identified. In the present study the adult individuals of the community served as subjects (see Vick 2008 for age classification). Only subjects with more than nine inspections per fruit species contributed to the analyses: six males and eight females.…”

Section: Introductionmentioning

confidence: 99%

The role of sucrose and sensory systems in fruit selection and consumption ofAteles geoffroyiin Yucatan, Mexico

et al. 2015

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Our aim was to evaluate the role of sucrose and the role of smell, taste and touch in the selection and consumption of fruit in wild spider monkeys. We recorded the feeding bouts of 14 adults for 9 mo in the Otoch Ma'ax Yetel Kooh Reserve, Punta Laguna, Yucatan, Mexico. For each of 2346 inspections on fruits of six species the consumption or rejection and the use of touch, smell and taste was recorded. Ten fruit samples (five ripe and five unripe) from each species were collected and the sucrose concentration was determined with a refractometer. As expected, sucrose concentrations were higher in ripe than unripe fruits. The difference in sucrose concentration between ripe and unripe fruits was positively associated with the proportion of attempts on ripe fruits and the proportion of consumed ripe fruits. Furthermore, the senses of touch and taste were used more often when fruits were ripe, whereas the sense of smell was used more often when fruits were unripe. The results suggest that sensory cues and sucrose concentration play important roles in fruit selection in spider monkeys.

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“…The study group included 36 individually identifiable monkeys older than 1 year: 4 adult males, 1 subadult male, 12 adult females, 5 subadult females, and 14 young. We defined young as individuals younger than 5 years but older than 1 year, given that infants aged less than 1 year still cling to their mothers' bodies for large periods of time and individuals younger than 5 years are found in the same subgroup as their mother [Vick, 2008]. Subadults were individuals between 5 and 8 years old, being sexually mature but not fully grown, and adults were individuals older than 8 years [Shimooka et al, 2008].…”

Section: Study Site and Subjectsmentioning

confidence: 99%

“…Adults were distinguished from young based on the size of the individual and facial coloration [Vick, 2008]. We included subadult individuals in the adult class as they are difficult to distinguish from adults during surveys.…”

Section: Data Collectionmentioning

confidence: 99%

How Survey Design Affects Monkey Counts: A Case Study on Individually Recognized Spider Monkeys (Ateles geoffroyi)

Spaan

Ramos‐Fernández

Schaffner

et al. 2017

IJFP

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The fast movement and high degree of fission-fusion dynamics of spider monkeys (Ateles spp.) make them notoriously difficult to survey. We examined which aspects of survey design affect spider monkey sightings along transects in a group of individually recognized spider monkeys (Ateles geoffroyi) in Punta Laguna, Yucatan, Mexico. We calculated the number of monkeys and subgroups sighted per transect walk. Using generalized linear models, we found no effect of the number of observers, transect type (new vs. existing), walking speed, or time of day on individual monkey counts or subgroup counts. Recounting of individuals was relatively rare and occurred when transects were walked relatively slowly. We missed more young than adult monkeys. The group composition based on survey data was similar to the known group composition. Based on our findings we recommend that surveys performed on relatively flat terrain be conducted at speeds similar to or faster than the moving speed of spider monkeys to minimize recounting of individuals and that young:adult female ratios based on survey data be interpreted as conservative indicators of population health.The novel methods presented to determine sources of bias in population estimates are applicable to a wide range of primates that are difficult to survey.

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Immaturity in spider monkeys: a risky business

Cited by 47 publications

References 75 publications

Effects of Fragment and Vegetation Structure on the Population Abundance of Ateles hybridus, Alouatta seniculus and Cebus albifrons in Magdalena Valley, Colombia

Effects of Fragment and Vegetation Structure on the Population Abundance of Ateles hybridus, Alouatta seniculus and Cebus albifrons in Magdalena Valley, Colombia

The role of sucrose and sensory systems in fruit selection and consumption ofAteles geoffroyiin Yucatan, Mexico

How Survey Design Affects Monkey Counts: A Case Study on Individually Recognized Spider Monkeys (Ateles geoffroyi)

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