Propithecus verreauxi: Louis, E.E., Sefczek, T.M., Bailey, C.A., Raharivololona, B., Lewis, R. & Rakotomalala, E.J.

2018 ◽  
Author(s):  
Keyword(s):  
Propithecus Verreauxi

scholarly journals Surveys on Propithecus verreauxi deckeni, a melanistic variant, and P. v. coronatus in north-west Madagascar

Oryx ◽  
1998 ◽  
Vol 32 (02) ◽  
pp. 157 ◽  
Author(s):  
Deborah J. Curtis ◽  
Arsène Velo ◽  
Evelyne-Odette Raheliarisoa ◽  
Alphonse Zaramody ◽  
Pie Müller
Keyword(s):  
Propithecus Verreauxi ◽  
North West

Female Power in Verreaux’s Sifaka (Propithecus verreauxi) Is Based on Maturity, Not Body Size

2019 ◽  
Vol 40 (3) ◽  
pp. 417-434 ◽  
Author(s):  
Rachel A. Voyt ◽  
Aaron A. Sandel ◽  
Kathryn M. Ortiz ◽  
Rebecca J. Lewis
Keyword(s):  
Body Size ◽  
Propithecus Verreauxi ◽  
Female Power

scholarly journals Birth season glucocorticoids are related to the presence of infants in sifaka ( Propithecus verreauxi )

2009 ◽  
Vol 276 (1663) ◽  
pp. 1855-1863 ◽  
Author(s):  
Diane K. Brockman ◽  
Amy K. Cobden ◽  
Patricia L. Whitten
Keyword(s):  
Stress Responses ◽  
Physiological Stress ◽  
Ecological Factors ◽  
Adult Males ◽  
Birth Season ◽  
Propithecus Verreauxi ◽  
Group Stability ◽  
Dispersal Events ◽  
Free Ranging ◽  
Plural Breeding

The responses of plural breeding mammals to environmental stressors are little understood in free-ranging populations, but recent studies of singular breeders suggest that ecological factors and social milieu influence the variable physiological stress responses observed among individuals. Our previous studies examining faecal glucocorticoid (fGC)–behaviour interactions in plural breeding male sifaka ( Propithecus verreauxi ) show that fGC elevations coincide with specific dispersal events, particularly the eviction of subordinates by resident alpha males. This study examined the utility of fGC assays for assessing the stress responses of male sifaka to demographic changes in the population during the birth season. Analyses were based on 889 faecal samples collected over five birth seasons from 124 adult males residing in 55 different groups at Beza Mahafaly, Madagascar. Results show that fGC levels in males are unrelated to age, residence, group stability or rank, but are significantly and positively correlated with the presence of infants, annual elevations in weekly mean fGC concentrations in males paralleling increasing numbers of infants born annually in the population. These data are the first to show that in seasonal plural breeding species such as sifaka, elevated fGC in males reflects specific events related to reproduction rather than states or social context during the birth season.

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