Jethro Emmanuel

2019-09-21: I recently revisited this post and attempted to recreate the plot using base R graphics, along with the mapplots and data.table packages for data manipulation. On May 24-25, 2018, I attended the 9th WPEA-NSAP Tuna Catch Estimates Review Workshop in Ocean 101, Catangnan, General Luna (Siargao), Surigao del Norte. The workshop aimed to review the NSAP port sampling data collected in each region and compile information from BFAR regional offices for the annual catch estimates of tuna species. [Read More]

This tutorial continues from the previous one, where we created a histogram with annotations for length-at-first maturity, juveniles, mature, and mega-spawners. In this tutorial, we will learn how to use facets to display a subset of the data, also known as small multiples. This type of graph is useful for comparing data across groups, such as the length frequency distribution of a species by fishing gear. Extracted from the official reference of ggplot2: [Read More]

Update: January 16, 2018. Updated the post to include the data from FSA and FSAdata packages. In our work, presenting the status of fish stocks is very important. It can help local fishers as well as Local Government Units (LGUs) in crafting an ordinance or measures to manage the fish stocks in their respective jurisdictions. The data cannot tell the real status unless it has a visual form, such as a graph or chart. [Read More]