Weight and length measurements for 37 Mekong River fish species of the ‘Dai’ fishery

The Lower Mekong Basin supports some of the world’s largest and most diverse inland fisheries by supplying nutrition to over 60 million people and an estimated 11 billion USD of economic activity each year. Despite the nutritional and economic importance of the fishery, there are limited data available on which fishery officers and managers can build fishery stock management plans. Traditional fishery stock management relies on models of individual and population growth that in turn rely on robust individual-based data sets, preferably collected over long time scales. One such fishery for which there are robust data sets are for the “dai,” or bagnet, fishery located on the Tonle Sap River that connects the Mekong River mainstream with the Tonle Sap Lake. However, datasets from the dai fishery are not publicly available, limiting their utility for understanding how catches in this fishery have changed over time. Several papers have utilized the data from the dai fishery, but none have ma..., Since at least the year 2000 the Cambodian Department of Fisheries has monitored the commercial fisheries catch at the ‘dai’ fishery on the Tonle Sap River. The dai fishery consists of a barrage of fishing extending laterally across the river at 15 locations (dai rows). Dai rows are numbered 2-16 and can include up to seven individual fishing platforms that deploy and raise large fishing nets into the water column. These nets measure approximately 25 meters in width, while the depth of the net is determined by the depth of the water column. At their peak, individual dai nets capture thousands of kilograms of fish per day. Monitoring of fish catch by the Department of Fisheries, now the Fisheries Administration (FiA), is conducted twice per month, corresponding with the high catch period in the seven days preceding the full moon, and the low catch period during the rest of the month during the period of time in which the Tonle Sap River flows from Tonle Sap Lake to the Mekong Mainstream ..., , # Weight and length measurements for 37 Mekong River fish species of the ‘Dai’ fishery

## Description of the data and file structure

The data package contains 6 .csv files and 4 folders containing plotted output of regressions.

Dai_2020_2021_TL.csv

This .csv file contains 32,274 observations of total length (tl) and weight measurements collected from November 2020 to March 2021 from two \"dai\" nets on the Tonle Sap River, Cambodia. Further details can be found in the methods.

The table contains three rows: Column \"Genus_species\" is the genus species name of each fish identified and measured; Column \"tl.cm\" is the total length measured to the nearest 0.1 centimeters (cm) and reported in centimeters; Column \"W.g\" is the weight of each fish measured to the nearest 0.1 grams (g) and reported in grams.

Dai_2020_2021_SL.csv

This .csv file contains 32,205 observations of standard length (sl) and weight measurements collected from November 2020 to March 2021 from two \"dai\" nets on the T...