Botanists and miners rely upon their gathering logs to locate and record information about the resources they seek, while fishers rely on their own unique log.
Eorzea's anglers must constantly account for a wide range of factors to optimize their success, including season, time, place, tools, and bait.
A little more detail on fisher, but not much. I'm curious what is unique about the log, and it is nice to see signs that it won't be a simple push button experience. I wonder why they didn't add seasons to gathering?