# Characterizing Sex Ratios of American Eels ( Anguilla rostrata ) in Louisiana

## TL;DR

This study examines the sex ratios of American eels in Louisiana by analyzing gonad samples to better understand their biology and population.

## Contribution

The study provides a sex determination protocol for American eels using histologic analysis across Louisiana.

## Key findings

- One hundred and eighteen eel samples were histologically analyzed to determine sex.
- The data complements morphometric, location, and ageing data for biological insights.
- Eels under 400 mm require histologic evaluation for accurate sex determination.

## Abstract

The American eel (
Anguilla rostrata)
inhabits Louisiana waterways; however, little is known about their life history, population abundance, or behavior. Eels under 400 mm require histologic evaluation to determine sex. We have processed eel gonad samples from 40 sampling locations across Louisiana, as well as across size categories to aid in establishing a sex determination protocol. One hundred and eighteen (118) eel samples have been histologically analyzed to date. The histologic data compliments morphometric, location, and ageing data collected by the Louisiana Department of Wildlife and Fisheries to build an initial understanding of the biological characteristics of American eels in Louisiana.