Mark Collard
Simon Fraser University
PaleontologyArchaeologyPopulationCultural transmission in animalsBiology
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Publications 29
#1Raymond Corbey (LEI: Leiden University)H-Index: 11
#2Adam JagichH-Index: 1
Last. Mark CollardH-Index: 17
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The goal of this paper is to provoke debate about the nature of an iconic artifact—the Acheulean handaxe. Specifically, we want to initiate a conversation about whether or not they are cultural objects. The vast majority of archeologists assume that the behaviors involved in the production of handaxes were acquired by social learning and that handaxes are therefore cultural. We will argue that this assumption is not warranted on the basis of the available evidence and that an alternative hypothe...
27 CitationsSource
#1Kimberly A. Plomp (SFU: Simon Fraser University)H-Index: 4
#2Una Strand Viðarsdóttir (University of Iceland)H-Index: 6
Last. Mark Collard (SFU: Simon Fraser University)H-Index: 17
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Background: Recent studies suggest there is a relationship between intervertebral disc herniation and vertebral shape. The nature of this relationship is unclear, however. Humans are more commonly afflicted with spinal disease than are non-human primates and one suggested explanation for this is the stress placed on the spine by bipedalism. With this in mind, we carried out a study of human, chimpanzee, and orangutan vertebrae to examine the links between vertebral shape, locomotion, and Schmorl...
12 CitationsSource
#1Luseadra McKerracher (SFU: Simon Fraser University)H-Index: 4
#2Mark Collard (SFU: Simon Fraser University)H-Index: 17
Last. Joseph Henrich (CIFAR: Canadian Institute for Advanced Research)H-Index: 62
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Abstract We report a study on nausea and vomiting of pregnancy (NVP) and pregnancy-related food aversions in a small-scale society from Yasawa Island, Fiji. Because NVP has rarely been studied quantitatively in small-scale populations, we begin with a detailed description of its expression among the women of Yasawa. We found that 66% of these women experience nausea and/or vomiting in tandem with the development of aversions to certain foods. This pattern of expression is similar to what has bee...
5 CitationsSource
#1Michael C. Westaway (Griffith University)H-Index: 11
#2Arthur C. Durband (TTU: Texas Tech University)H-Index: 7
Last. Mark Collard (SFU: Simon Fraser University)H-Index: 17
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Henneberg et al. (1) and Eckhardt et al. (2) present another pathology-based alternative to the hypothesis that the “hobbit” fossils from Liang Bua, Indonesia, represent a distinct hominin species, Homo floresiensis. They contend that the Liang Bua specimens are the remains of small-bodied humans and that the noteworthy features of the most complete specimen, LB1, are a consequence of Down syndrome (DS). Here, we show that the available mandibular evidence does not support these claims.
2 CitationsSource
#1W. Christopher Carleton (SFU: Simon Fraser University)H-Index: 3
#2David A. Campbell (SFU: Simon Fraser University)H-Index: 11
Last. Mark Collard (SFU: Simon Fraser University)H-Index: 17
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Abstract The study reported here challenges the widely discussed hypothesis that cyclical droughts had a major impact on the Classic Maya. This hypothesis was developed by Hodell et al. (2001, 2005) on the basis of the results of time series analyses of cores from Lake Chichancanab in the Yucatan peninsula. Hodell et al.'s analyses indicated that the Maya region was affected by two drought cycles during the 1st millennium CE, one with a periodicity of 208 years and another with a periodicity of ...
11 CitationsSource
#1Jessica Munson (UC Davis: University of California, Davis)H-Index: 5
#2Viviana Amati (University of Konstanz)H-Index: 6
Last. Martha J. Macri (UC Davis: University of California, Davis)H-Index: 7
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Religious rituals that are painful or highly stressful are hypothesized to be costly signs of commitment essential for the evolution of complex society. Yet few studies have investigated how such extreme ritual practices were culturally transmitted in past societies. Here, we report the first study to analyze temporal and spatial variation in bloodletting rituals recorded in Classic Maya (ca. 250–900 CE) hieroglyphic texts. We also identify the sociopolitical contexts most closely associated wit...
16 CitationsSource
#1Gabrielle Jackson (SFU: Simon Fraser University)H-Index: 1
#2Arne Ø. Mooers (SFU: Simon Fraser University)H-Index: 40
Last. Mark CollardH-Index: 17
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Background: The Metabolic Theory of Ecology (MTE) predicts that gestation duration, lactation duration, and their sum, total development time, are constrained by mass-specific basal metabolic rate such that they should scale with body mass with an exponent of 0.25. However, tests of the MTE’s predictions have yielded mixed results. In an effort to resolve this uncertainty, we used phylogenetically-controlled regression to investigate the allometries of gestation duration, lactation duration, and...
4 CitationsSource
#1Michael J. O'BrienH-Index: 72
#2Briggs BuchananH-Index: 24
Last. Mark CollardH-Index: 17
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1 CitationsSource
#1Michael J. O'Brien (MU: University of Missouri)H-Index: 72
#2Matthew T. Boulanger (MU: University of Missouri)H-Index: 11
Last. John Darwent (UC Davis: University of California, Davis)H-Index: 8
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Abstract North American fluted projectile points are the quintessential temporally diagnostic artifacts, occurring over a relatively short time span, from ca. 13,300 calBP to ca. 11,900 calBP, commonly referred to as the Early Paleoindian period. Painting with a broad brush, points from the Plains and Southwest exhibit less diversity in shape than what is found in the East, especially for the later half of the Early Paleoindian period. It remains unclear how various fluted-point forms relate to ...
50 CitationsSource
#1Briggs Buchanan (SFU: Simon Fraser University)H-Index: 24
#2Michael J. O'Brien (MU: University of Missouri)H-Index: 72
Last. Mark Collard (SFU: Simon Fraser University)H-Index: 17
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Researchers have debated the existence of regional variation in Clovis points for over 60 years. Here, we report an attempt to resolve this argument using a large sample of Clovis points from dated assemblages and a suite of shape analysis methods known as geometric morphometrics. The study tested the two main hypotheses that have been put forward in the debate: the continent-wide adaptation hypothesis, which holds that Clovis points do not vary regionally, and the regional environmental adaptat...
59 CitationsSource