Inbreeding avoidance and cost in a small, isolated trout population

The persistence of small populations is influenced by the degree and cost of inbreeding, with the degree of inbreeding depending on whether close-kin mating is passively or actively avoided. Few studies have simultaneously studied these factors. We examined inbreeding in a small, isolated population of westslope cutthroat trout using extensive genetic and demographic data. Passive inbreeding avoidance was low, with predicted life-time dispersal of approximately 36 and 74 m for females and males, respectively. Additionally, we found limited evidence for active inbreeding avoidance during reproduction. Relatives remained spatially clustered into adulthood, and observed relatedness among mate pairs was greater than expected under random mating by 0.09, suggesting that inbreeding is a concern in this population. Further, we examined sex-specific inbreeding depression throughout the life-cycle and provide evidence for inbreeding depression in some fitness components, including family size, j..., , , # Inbreeding avoidance and cost in a small, isolated trout population

Access datasets on Dryad: [https://doi.org/10.5061/dryad.fj6q5743h]()

## Description of the data and file structure

We provide two datasets: 1) demographic data for all capture events (`Belletal_trout_inbreeding_2024_demographic_data.csv`) and 2) genotype data with genetic IDs that correspond to IDs in the demographic dataset (`Belletal_trout_inbreeding_2024_genotypic_data.csv`). 

1\) **Demographic data** column descriptions

* CMR: Whether the sample was collected during a marking (*Cap*) or recapture (*Recap*) run for the two years (2017 and 2018) that within year mark recapture was conducted.
* Location: Whether the sample was collected below or above the isolation barrier. The population of interest and all analyses focus on the above barrier samples.
* Section: The 40 m section that the fish was collected in. The sections start at 0 for the first section above the isolation barrier, and then proceed in increm...