Food mechanical properties, feeding ecology, and the mandibular morphology of wild orangutans

Vogel, Erin R.; Zulfa, Astri; Hardus, Madeleine E.; Wich, Serge A.; Dominy, Nathaniel J.; Taylor, Andrea B.

doi:10.1016/j.jhevol.2014.05.007

Cited by 47 publications

(64 citation statements)

References 117 publications

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“…Acknowledging that the lack of statistical support for the SNC model in some genera/premolar positions may be related to small sample sizes, our results do suggest that other factors may be influencing variation in root form within and between hominoid taxa. For example, both Gorilla and Pongo have mechanically demanding diets (see Dominy et al, ; Constantino et al, ; Vogel et al, ) and our results could be related to functional adaptations in premolar root structure rather than size variability. Masticatory demands selecting for increased root number (i.e., greater attachment area and/or stability; Kupczik et al, ) would explain why, for example, the UP3/LP4 are conserved across the sample and the UP4 is nearly monomorphic in Gorilla / Pongo .…”

Section: Discussionmentioning

confidence: 61%

“…Our LP3 type 4‐A‐1 (found only in Pongo ) has not been described in extant apes and resembles the “molarized” form of Paranthropus boisei (Abbott, ; Wood et al, ). As the craniodental morphology of Pongo has also been implicated in the mastication of hard/tough food items (e.g., Vogel et al, ) future research should explore whether this is an example of convergent evolution with Paranthropus . For the LP4, Abbott () reports specimens with four canals (we found this type at low frequency) and Emonet and Kullmer () report a three rooted (possibly 3‐C‐1) type (50%), which is not present in our sample.…”

Section: Discussionmentioning

confidence: 99%

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Premolar root and canal variation in extant non‐human hominoidea

Moore

Hublin

Skinner

2015

American J Phys Anthropol

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Section: Discussionmentioning

confidence: 61%

Section: Discussionmentioning

confidence: 99%

Premolar root and canal variation in extant non‐human hominoidea

Moore

Hublin

Skinner

2015

American J Phys Anthropol

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“…Thus, while our data reveal co-occurrence of seed-eating and ingestive work, this observation is far from adequate for implicating a causal connection. Nevertheless, by integrating oral processing data from the field with those on material properties across the entirety of the diet (e.g., Vogel et al, 2014), we establish the context for studiesdsuch as those on bone stiffness (e.g., Daegling et al, 2011a,b) and secondary remodeling (Bouvier and Hylander, 1996;Lad et al, 2013)dthat help decipher how load frequency and load magnitude influence the structural and material variation in masticatory morphology.…”

Section: Resultsmentioning

confidence: 99%

Feeding and oral processing behaviors of two colobine monkeys in Tai Forest, Ivory Coast

McGraw

Casteren

Kane

et al. 2016

Journal of Human Evolution

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We collected frequency data on oral processing behaviors during feeding in habituated groups of Western red colobus, Piliocolobus badius, and Western black and white, Colobus polykomos, ranging in the Ivory Coast's Tai National Park. During the sampling period, the diet of red colobus consisted of approximately 75% leaves compared to approximately 47% leaves and buds in black and white colobus. Black and white colobus chewed more frequently per ingestive event than did red colobus. Black and white colobus also employed their anterior teeth much more frequently than did red colobus, a difference attributed to the frequent consumption by C. polykomos of Pentaclethra macrophylla seeds and pods. A material analysis of these food items reveals that both the seed coating and seed flesh are quite soft; however, the pod housing the seeds is very tough. We argue that the pod's toughness, geometry, and fiber orientation collectively result in a food that is very difficult to process, resulting in long handling times and frequent, aggressive use of the incisors. We compare these data with those collected on another Tai primate-the sooty mangabey, Cercocebus atys-and demonstrate that during feeding, both colobine species use their incisors less than the mangabey, but that the cercopithecine chews less than either colobine. Combining data on oral processing behaviors with those on the material properties of items being ingested should lead to more informed interpretations of dentognathic morphology.

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“…The toughest foods in a primate's diet are not necessarily those eaten most frequently. The most mechanically challenging foods in a primate's diet may represent rarely consumed fallback foods (Lambert et al, 2004;Marshall and Wrangham, 2007; although some mechanically challenging food are preferentially selected for consumption, for example, Vogel et al, 2008Vogel et al, , 2009Vogel et al, , 2014Chalk, 2011;Daegling et al, 2011). Thus, estimates of average and median toughness are potentially more representative of the overall mechanical challenges of a given diet than is maximum toughness.…”

Section: Discussionmentioning

confidence: 99%

Trabecular Anisotropy in the Primate Mandibular Condyle Is Associated with Dietary Toughness

Coiner-Collier

Vogel

Scott

2018

The Anatomical Record

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Past attempts to establish a relationship between mandibular morphology and different dietary categories (e.g., frugivore, folivore, insectivore) have had mixed results, possibly because descriptive dietary categories are too broad and obscure variation within primate diets. Another potential reason is that not all aspects of skeletal architecture, especially trabecular anisotropy, have factored into functional assessments of dietary inputs into jaw form. Recent emphasis on quantifying food mechanical properties (FMPs) has provided an alternative to reliance on dietary categories. We used data on FMPs to test for correlations among dietary toughness and Young's modulus and the trabecular structure of the mandibular condyle, which is loaded during feeding and should reflect differences in masticatory stresses associated with different dietary FMPs. Adult primate mandibles from 11 species were imaged using high-resolution X-ray computed tomography, and trabecular structure was analyzed with BoneJ and Quant3D to assess common three-dimensional trabecular parameters. Results of phylogenetic generalized least squares analysis suggested a positive correlation between the degree of anisotropy (DA) and toughness, and weaker correlations between FMPs and various other trabecular variables. Because the DA contributes to the mechanical properties of bone, these results suggest a functional relationship between dietary toughness and trabecular anisotropy in the mandibular condyle. Such a perspective underscores the need to consider all aspects of skeletal morphology in evaluating the links between diet and jaw biomechanics. Anat Rec, 2018. © 2018 Wiley Periodicals, Inc.

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Food mechanical properties, feeding ecology, and the mandibular morphology of wild orangutans

Cited by 47 publications

References 117 publications

Premolar root and canal variation in extant non‐human hominoidea

Premolar root and canal variation in extant non‐human hominoidea

Feeding and oral processing behaviors of two colobine monkeys in Tai Forest, Ivory Coast

Trabecular Anisotropy in the Primate Mandibular Condyle Is Associated with Dietary Toughness

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