Modeling post-fledging survival of Lark Buntings in response to ecological and biological factors

Ecology
Amy A Yackel AdamsJulie A Savidge

Abstract

We evaluated the influences of several ecological, biological, and methodological factors on post-fledging survival of a shortgrass prairie bird, the Lark Bunting (Calamospiza melanocorys). We estimated daily post-fledging survival (n = 206, 82 broods) using radiotelemetry and color bands to track fledglings. Daily survival probabilities were best explained by drought intensity, time in season (quadratic trend), ages < or = 3 d post-fledging, and rank given drought intensity. Drought intensity had a strong negative effect on survival. Rank was an important predictor of fledgling survival only during the severe drought of 2002 when the smallest fledglings had lower survival. Recently fledged young (ages < or = 3 d post-fledging) undergoing the transition from nest to surrounding habitat experienced markedly lower survival, demonstrating the vulnerable nature of this time period. Survival was greater in mid and late season than early season, corresponding to our assumptions of food availability. Neither mark type nor sex of attending parent influenced survival. The model-averaged product of the 22-d survival calculated using mean rank and median value of time in season was 0.360 +/- 0.08 in 2001 and 0.276 +/- 0.08 in 2002. Surviv...Continue Reading

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Citations

Jul 30, 2011·Conservation Biology : the Journal of the Society for Conservation Biology·R S SteneckB Worm
Feb 15, 2013·PloS One·Matthew I McKim-LouderWendy M Schelsky
Feb 25, 2014·The American Naturalist·Thomas E Martin
Mar 19, 2013·Ecological Applications : a Publication of the Ecological Society of America·Sébastien Rioux PaquetteMarc Bélisle
May 4, 2011·Environmental Toxicology and Chemistry·Jill A AwkermanSandy Raimondo
Apr 1, 2014·Ecology and Evolution·Martin U GrüeblerBeat Naef-Daenzer
Dec 17, 2014·Ecology and Evolution·Erik J BlombergMichael L Casazza
Jan 5, 2017·Ecological Applications : a Publication of the Ecological Society of America·Daniel GibsonJames S Sedinger

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