Temporal variation in early-life conditions impacts on later-life levels of infection in sex specific ways. Associated data and code

Parasites are a fundamental component of wild animal populations, often inducing sub-lethal chronic effects that impact host fitness and demography. However, the factors determining variation in infection burden are often poorly understood in wild systems. Environmental conditions can determine exposure to infection and the resources required to respond, but exhibit strong temporal variation. As these are predicted to become more variable, understanding how they shape infection is key to predicting the impact of environmental change on host populations. Responses to infection are shaped in early life potentially leading to lagged effects of environmental variation on fitness. The extent to which these are mediated by resources and later-life conditions remains unclear and may vary between the sexes who often differ in exposure and resource requirements. Here, we examine how intra- and inter-annual differences in hatching and breeding conditions influence infection levels throughout life..., , # Temporal Early life effects on parasitism - European shag data sets and code

Dataset DOI: [10.5061/dryad.pnvx0k70d](10.5061/dryad.pnvx0k70d)

## Description of the data and file structure

This data was collected in order to investigate the impact of the timing of early life and current breeding on nematode parasite burden at different life stages of European shag. To do this we quantified nematode parasite burden in chick and adult European shags and monitored their early life and breeding conditions. For chicks parasite burden was measured in three years, whereas for adults this was carried out across eight years. Throughout the date format DD/MM/YYYY is used and NAs and #VALUE indicates cases where data was not available. 

### Files and variables

#### File: Temporal_earlylife_effects_chickdata_EE.Submission.xlsx

**Description:** European shag chick parasite burden and early life data set along with data dictionary. Also provided in .csv.

##### Variables

| **Variable** ...,