A telomeric perspective on the (anti-)aging phenotype of male wire-tailed manakins (Pipra filicauda)


SOCIETY FOR INTEGRATIVE AND COMPARATIVE BIOLOGY
2021 VIRTUAL ANNUAL MEETING (VAM)
January 3 – Febuary 28, 2021

Meeting Abstract


16-1  Sat Jan 2  A telomeric perspective on the (anti-)aging phenotype of male wire-tailed manakins (Pipra filicauda) Vernasco, BJ*; Dakin, R; Majer, AD; Haussmann, MF; Ryder, TB; Moore, IT; Washington State University; Carleton University; Bucknell University; Bucknell University; Bird Conservancy of the Rockies; Virginia Tech ben.vernasco@wsu.edu

Telomeres are considered molecular markers of biological age as telomere lengths vary with longevity inter- and intra-specifically and telomere dynamics depend upon various intrinsic and extrinsic factors. Telomeres have therefore been used to understand how different life histories relate to patterns of biological aging, though such studies are often hindered by the challenges of re-sampling free-living individuals. Here, we examine the longitudinal dynamics of telomeres in a free-living population of male wire-tailed manakins to understand how the atypical life history of wire-tailed manakins is related to patterns of biological aging. Wire-tailed manakins are passerine birds found in the Amazon and males exhibit colorful plumages, elaborate lekking behaviors, and fruit-rich diets. Males also have high annual survival rates (annual survival probability = 0.71-0.79) and remarkably long lifespan for their size (average lifespan +/- 1 SD = 8.41 +/- 2.8 years, max lifespan = 16+ years, adult male mass = 13 to 15 grams). We use 187 telomere measurements from 53 males to quantify the repeatability (i.e., a measure of within-individual consistency) of telomere lengths, test for instances of telomere elongation, and examine age-dependent changes in telomere lengths, both within- and between-individuals. The telomeres of male wire-tailed manakins were found to be highly stable and did not depend on an individual’s age or social status. Telomere elongation that exceeded residual error was also found to occur very infrequently. We discuss our results in the context of the unique life-history of this species and compare our results to patterns observed in other animals.

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