Ecogeographic size variations in Sifakas: a test of the resource seasonality and resource quality hypotheses

American Journal of Physical Anthropology
Shawn M LehmanPatricia C Wright

Abstract

Ecogeographic size variations have been documented in some but not all sifakas. Few morphometric or body weight data have been available for two critically endangered subspecies of diademed sifakas: Perrier's sifakas (Propithecus diadema perrieri) and silky sifakas (Propithecus diadema candidus). The objectives of our study were to determine size variations in sifakas and if these variations are related to resource quality and/or resource seasonality. P. d. perrieri and P. d. candidus were captured, weighed, and measured in northern Madagascar. Body weights and morphometrics were compared with other subspecies of diademed sifakas and indris (Indri indri). Differences in body weights and morphometrics between taxa are particularly pronounced for P. d. perrieri compared to P. d. diadema, P. d. edwardsi, and I. indri. Most morphometrics varied in comparisons between P. d. candidus and the other Indriidae (P. d. diadema, P. d. edwardsi, and I. indri). Average body size in sifakas is positively correlated with annual rainfall and negatively correlated with length of dry season. Sifaka body size is not correlated with protein-to-fiber ratios. Thus, size variations in sifakas are related to resource seasonality rather than resource qu...Continue Reading

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Citations

Jan 8, 2008·Folia primatologica; international journal of primatology·Elizabeth M Erhart, Deborah J Overdorff
Jul 3, 2015·Journal of Evolutionary Biology·E M Tennenhouse
Apr 19, 2013·American Journal of Physical Anthropology·Adam D GordonEdward E Louis
Jan 10, 2012·Evolution; International Journal of Organic Evolution·Janneke T van WoerdenKarin Isler
Jan 25, 2012·American Journal of Physical Anthropology·Jason M KamilarJames P Herrera
Sep 21, 2010·American Journal of Primatology·Stephen J KingPatricia C Wright
Feb 16, 2018·American Journal of Physical Anthropology·Nicole D S GrunstraRobert A Foley
Jun 15, 2007·American Journal of Physical Anthropology·Kathleen M Muldoon, Elwyn L Simons
Apr 22, 2009·The Anatomical Record : Advances in Integrative Anatomy and Evolutionary Biology·Jess White
Dec 21, 2005·American Journal of Physical Anthropology·Shawn M Lehman
Feb 12, 2011·American Journal of Physical Anthropology·Kira E DelmoreSteig E Johnson

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