Data for: Larger eyes are selected for in high competition environments

Intraspecific variation in vertebrate eye size is well known. Ecological factors such as light availability are often correlated with shifts in relative eye size. However, experimental tests of selection on eye size are lacking. Trinidadian killifish (Anablepsoides hartii) are found in sites that differ in predation intensity. Sites that lack predators are characterized by lower light, high killifish densities, low resource availability, and intense competition for food. We previously found that killifish in sites that lack predators have evolved a larger relative eye size than fish from sites with predators. Here we used transplant experiments to test how selection operates on eye size when fish that are adapted to sites with predators are translocated into sites where predators are absent. We observed a significant ‘population x relative eye size’ interaction; the relationship between relative eye size and a proxy for fitness (rates of individual growth) was positive in the transplant..., , , *File name: JEB_Tran_TransplantEyesMS_finaldata

*Dataset title: Data for the article \"Larger eyes are selected for in high competition environments\"

*Authors:

Stephanie M. Tran: [[e-mail]](mailto:[e-mail])
Kaitlyn J. Howell: [[e-mail]](mailto:[e-mail])
Matthew R. Walsh: [[e-mail]](mailto:[e-mail])

Department of Biology
University of Texas at Arlington
Arlington, TX 76019

*Date created: 2023-07-02
*Date updated: 2024-05-10

## \*Persistent Identifier: [https://doi:10.5061/dryad.5dv41nsbd](https://doi:10.5061/dryad.5dv41nsbd)

This data set comes from using ImageJ to measure eye and pupil size from an original dataset ([https://doi.org/10.1111/ele.14133)](https://doi.org/10.1111/ele.14133\)). It includes the following columns: stream, population, mark, sex, initial date, initial weight, recapture date, recapture weight, instantaneous growth, and ln-transformed eye and pupil measurements. The data was...