Fledgling failure and maternal infection.

<p>The relationship between fledgling failure (i.e. probability that eggs fail to develop into fledglings) over a 11-day interval with maternal faecal egg count (FEC) of the parasite <i>Syngamus trachea</i> in house sparrows on the island of Hestmannøy, northern Norway. The solid line indicates predicted values from the highest ranked generalized linear mixed model as judged by AIC_C (see <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0125773#pone.0125773.s003" target="_blank">S2 Table</a>). The model included individual identity as a random factor, and maternal tarsus length and hatch day as fixed covariates. Dotted lines indicate lower and upper limits of the 95% confidence interval of predicted values. “Sunflower” points indicate sample size of observed values.