Variation in ontogenetic trajectories of limb dimensions in humans is attributable to both climatic effects and neutral evolution

Yim, An‐Di; Cowgill, Libby W.; Katz, David C.; Roseman, Charles C.

doi:10.1016/j.jhevol.2023.103369

Cited by 5 publications

(2 citation statements)

References 95 publications

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“…Interestingly, the relationship between stature and extreme (maximum and minimum) temperatures is similar to that of leg length (both absolute and relative) (Pomeroy et al, 2021) as well as that of distal limb elements (Savell et al, 2016). Population difference in limb dimensions and proportions is also evident in individuals less than one-year-old and is maintained throughout growth (Cowgill et al, 2012;Yim et al, 2022), suggesting a long-term, evolutionary response is likely responsible for the patterns observed worldwide. Because of the similar relationship between stature, leg length, (distal) long bone lengths, and climate, it can also be hypothesized that the relationships among stature, leg length, and long bone lengths should be relatively conserved among populations.…”

Section: Staturementioning

confidence: 73%

Recentering forensic anthropology within a multifaceted body of evolutionary theory: Strengthening method by making theory explicit

Winburn

Yim

Stock

2022

American Journal of Biological Anthropology

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The discipline of forensic anthropology has been critiqued for its lack of a theoretical basis. In response, practitioners often assert that their analyses are implicitly grounded in evolutionary theory. However, the nature of this theoretical grounding is little discussed in the forensic anthropology literature, beyond, for example, statements indicating that sex‐based pelvic differences have evolved in response to increasing encephalization within the genus Homo, or that clinal variation in features like limb proportions have evolved within our species due to environmental pressures that differ on a gradient. Further, while the role of natural selection in shaping the morphologies analyzed in biological profile estimation is undeniable, adaptation in response to environmental pressures does not explain all variation within our species. Evolutionary theory is not monolithic; different perspectives on the primacy of functional adaptation versus factors like drift and phenotypic plasticity lead to differences in skeletal interpretations and lead researchers to novel approaches in creating new or improving current methodologies. Various theoretical perspectives underpin forensic anthropological analyses, and in order for forensic anthropology to be truly grounded in evolutionary theory, these theoretical perspectives must be not only made explicit but also interrogated in terms of how they inform forensic anthropological interpretations.

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Section: Staturementioning

confidence: 73%

Recentering forensic anthropology within a multifaceted body of evolutionary theory: Strengthening method by making theory explicit

Winburn

Yim

Stock

2022

American Journal of Biological Anthropology

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“…The value obtained in the present study for Argentina (8%) is in the group with prevalences below 10%, together with Costa Rica (9.5%), Brazil (7.2%), Cuba (7%), Uruguay (6.5%) and Chile (1.6%). Unfortunately, in this study we do not have data corresponding to sitting height or limb length, an important aspect to determine the possible adaptive evolutionary significance of the stunting cases detected at the regional level (Yim et al, 2023). Although in the present work we focus on the effect of socioeconomic conditions, proportionality is a factor that could add information on the effect of climatic effects, which have a remarkable variation in a country as large as Argentina.…”

Section: Discussionmentioning

confidence: 99%

Composite indexes of anthropometric failure in children under 5 years of age in Argentina: Comparative analysis among regions: 2019–2020

Salazar Burgos,

Longhi,

Marrodán Serrano

2023

American J Hum Biol

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ObjectivesComposite Index of Anthropometric Failure (CIAF) and Extended CIAF (ECIAF) allow for the identification of simultaneous presence of two or more types of malnutrition. The objective of this study was to analyze anthropometric failure in Argentinean children under 5 years old, taking into consideration regional and socioeconomic perspectives.Materials and MethodsData from the National Survey of Children and Adolescents MICS 2019–2020 were used, which included 5473 children under 5 years old of both sexes residing in the six regions of Argentina. CIAF and ECIAF excludes children not in anthropometric failure (group A) and was calculated from a percentage of children included in malnutrition categories B: wasting only; C: wasting and underweight; D: wasting, stunting, and underweight; E: stunting and underweight; F: stunting only; Y: underweight only; G: only weight excess; and H: stunting and weight excess. The data were analyzed according to region and wealth quintile.ResultsIn children aged 0–2.99 years, CIAF was 12.5% and ECIAF was 27.7%, with boys being more affected. In children aged 3–4.99 years, the rates were 9.7% and 22.3%, respectively, with girls showing a higher prevalence. The highest ECIAF was recorded in the Patagonia region (31.3%), while the highest ECIAF was observed in the poorest quintile.DiscussionThe presence of double burden of malnutrition has been observed across all regions and household income levels. Additionally, overweight has shown a higher intensity in economically prosperous regions and households, while stunting has been more prevalent in economically disadvantaged areas.

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Impact of relative lower‐limb length on heat loss and body temperature during running

Struška,

Jarešová,

Hora

et al. 2024

American Journal of Biological Anthropology

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ObjectivesLong lower limbs relative to body size are thought to be an adaptation to prevent excessive increases in body temperature during running in hot climate. The advantage of long lower limbs relative to body size is usually explained by an increase in body surface area relative to mass; however, the influence of limb length on relative body surface area was shown to be minor. We aimed to experimentally test the effect of relative lower‐limb length (LLL) on body temperature changes during running. Furthermore, we tested the effect of relative LLL on relative body surface area.Materials and MethodsAdult men (n = 37) ran for 40 min on a treadmill, while their core temperature (ingestible thermometer), skin temperature (infrared thermography), and oxygen consumption (indirect calorimetry) were measured. Relative LLL was calculated as residuals from linear regression of LLL on stature. Linear regression was used to test the effect of relative LLL on standardized heat loss (heat loss/heat production), mean body temperature (weighted mean of skin and core temperatures), and body surface area.ResultsRelative LLL had a positive effect on standardized heat loss and a negative effect on mean body temperature change during running. Relative LLL had a positive effect on the proportion of body surface area allocated to the lower limbs but not on the relative body surface area.DiscussionThe reduced increase in mean body temperature associated with long lower limbs suggests an advantage of relatively long lower limbs for greater endurance and speed during persistence hunting or contemporary running events.

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Variation in ontogenetic trajectories of limb dimensions in humans is attributable to both climatic effects and neutral evolution

Cited by 5 publications

References 95 publications

Recentering forensic anthropology within a multifaceted body of evolutionary theory: Strengthening method by making theory explicit

Recentering forensic anthropology within a multifaceted body of evolutionary theory: Strengthening method by making theory explicit

Composite indexes of anthropometric failure in children under 5 years of age in Argentina: Comparative analysis among regions: 2019–2020

Impact of relative lower‐limb length on heat loss and body temperature during running

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