Fluctuating selection among years in a wild insect (Gryllus campestris)

Temporal or spatial variation in selection has the potential to explain long standing evolutionary problems such as evolutionary stasis and the maintenance of genetic variation. Long-term field studies of plants and wild vertebrates have provided some insights, but multigenerational measures of selection in wild invertebrates remain scarce. Short-lived ectothermic animals are likely to experience more pronounced environmental variation across generations than longer-lived and endothermic species. As a result, variation in selection may be particularly significant in these groups. Over ten years, we have monitored an individually tagged population of wild crickets (Gryllus campestris) using a network of up to 133 day-night video cameras. The over a million hours of video that we watched allowed us to capture detailed information about naturally and sexually selected traits and life-history parameters. Over ten discrete generations, population size ranged from 51 to 546 adults. There were..., Study system
Our data are the product of WildCrickets, a long-term project monitoring of a wild population of field crickets G. campestris in a meadow in northern Spain (Rodríguez-Muñoz et al. 2019d). This species has a single generation each year, with the first adults emerging in mid to late April and the last adults dying in mid-July. Individuals of both sexes build burrows as a refuge from predation and bad weather. Most interesting events occur at burrow mouths (Rost and Honegger 1987) with individuals spending only short periods moving between them. This lifestyle allows us to record the adult lives of the entire population in great detail, by attaching unique tags to individuals as they become adult and monitoring the population through daily surveys and a network of up to 133 day/night video cameras. During the adult season, males call from their burrows to attract females and both sexes move around the meadow, displacing members of the same sex from burrows and sharing burrows ..., , # Fluctuating selection among years in a wild insect

[https://doi.org/10.5061/dryad.rxwdbrvm8](https://doi.org/10.5061/dryad.rxwdbrvm8)

## Description of the data and file structure

This README explains the meaning of each of the variables included in the \"VariationSelection\" data file. Each row represents an individual. The study is based on the monitoring of a wild population of the field cricket (*Gryllus campestris*), a univoltine species, over eight consecutive generations. 

### Files and variables

#### File: VariationSelection.txt

**Description:** Each row represents an individual. This species is univoltine. Missing data are shown as n/a.

##### Variables

* Fitness: Number of adult offspring left for the next generation
* Year: Year of the breeding season for that adult
* Sex: Female (F) or male (M)
* TWc: Thorax width (mm) centered within year
* TWaY: Thorax width (mm) centered within year and standardised across years
* EDc: Julian emergence date (days from 1st January) ...,