Effects of female-specific selection for reproductive investment on male fertility traits

Despite sharing an autosomal genome, the often divergent reproductive strategies of males and females cause selection to act in a sex-specific manner. Selection acting on one sex can have negative, positive, or neutral fitness consequences on the opposite sex. Here we test how female-limited selection on reproductive investment in Japanese quail (Coturnix japonica) affects male fertility-related traits. Despite there being no difference in the size of males’ testes from lines selected for high female reproductive investment (H-line) or low female reproductive investment (L-line), in both lines, the left testis had a greater volume of sperm-producing tissue. Since H-line females have a larger left-side restricted oviduct, this suggests a positive genetic correlation between male and female gonad function, and that internal testis structure is a target of sexual selection. However, despite H-line males having previously been found to have greater fertilisation success in a competitive sce..., , , # Data from: Effects of female-specific selection for reproductive investment on male fertility traits

[https://doi.org/10.5061/dryad.x69p8czt5](https://doi.org/10.5061/dryad.x69p8czt5)

Data and Code Responsibility: Chloe Mason

## Description of the data and file structure

CSV files with data on various testis and sperm traits measured from a population of Japanese quail selected for high and low female reproductive investment. Each CSV file has a corresponding README file that contains a summary of the data and a description of the column headings.

Digital images of testes used to measure testis volume, testis cross-sections used to measure the volume of sperm-producing tissue and the density of seminiferous tubules, and sperm used to measure sperm morphology, are provided.

Video recordings used for sperm velocity and motility measures are provided. 

## Code/Software

R scripts containing all analyses used in the main text and Supplementary Material. 

Workflow: Code in Dyrad in...