% pubman genre = article
@article{item_3627988,
title = {{Potential of Japanese macaques for understanding etiology and seasonality of repetitive linear enamel hypoplasia in nonhuman primates}},
author = {Skinner, Mark Fretson and Asami, Mao and Skinner, Matthew M. and Kato, Akiko},
language = {eng},
issn = {0275-2565; 1098-2345},
doi = {10.1002/ajp.23713},
year = {2025},
date = {2025-01},
abstract = {{Japanese macaques are ideal to advance understanding of a wide{-}spread pattern of recurrent developmental distress in greatapes, preserved as repetitive linear enamel hypoplasia (rLEH). Not only are they numerous, unendangered, and well{-}studied,but they are distributed from warm{-}temperate evergreen habitats in southern Japan to cool{-}temperate habitats in the north,where they are adapted behaviorally and phenotypically to winter cold and seasonal undernutrition. We provide a pilot study todetermine if enamel hypoplasia exists in Japanese macaques from the north and, if temporal patterns of enamel hypoplasia areconsistent with seasonal cold, undernutrition and/or exposure to secondary plant compounds. High{-}resolution casts of canineteeth from 15 males obtained from Shimokita Peninsula (latitude 41.3{\mbox{$^\circ$}} N) between 2012 and 2014, whose skeletons are curatedat the Center for the Evolutionary Origins of Human Behavior, Kyoto University, were imaged by confocal and scanningelectron microscopy. Perikymata, the surface expression of regularly deposited imbricational layers of enamel, provide anestimate of time between and within hypoplastic enamel defects. Based on histological sections from five individuals, wedetermined Retzius periodicity to be 7 days. Evidence for recurrence, duration, and severity of 68 LEH defects was collectedfrom perikymata counts as well as measurements of LEH angle of onset, depth and width. Male canine teeth show four to fiverecurrent, evenly{-}spaced enamel defects per crown with a median of 54.8 (range 18{\textendash}74) perikymata between defects; lasting onaverage 8.7 (range 1{\textendash}20) perikymata. These translate into repetitive developmental distress averaging every 1.05 years, lasting8.7 weeks, less than local winter foraging conditions (100 days). We conclude that linear enamel hypoplasia recurs circ{-}annuallyamong high{-}latitude male monkeys from Japan. The triad of cold, hunger and anti{-}feedants can be differentiated in future studythrough recourse to provisioned and un{-}provisioned populations throughout the Japanese archipelago.}},
journal = {{American Journal of Primatology}},
volume = {87},
number = {1},
eid = {e23713},
}