Estimated to be 70 years to over 100 years old....
Anyway, nice job if you can get it....
https://www.ktvb.com/article/sports...WtLk5KTQh-QrOsRvSPYc8uW0l5f-bCp6moWUflPcWhite sturgeon reside in the Snake, lower Salmon, and Kootenai rivers, according to the Idaho Department of Fish and Game website.
Each year, DuPont and other researchers with Idaho Fish & Game, Idaho Power and the Nez Perce Tribe spend time fishing on the Snake River in Hells Canyon so they can measure, tag, scan for previous tags, and evaluate the condition of the sturgeon they catch. This takes place between Hells Canyon Dam and Lower Granite Dam. DuPont said that work helps increase understanding of the growth, movement and mortality of the fish, and helps highlight areas of concern where the researchers may want to do more focused work in the future. One example of more focused research relates to the growth rates of juvenile white sturgeon.
However, one of the most frequently-asked questions is, "just how big do sturgeon get?"
DuPont said the biggest sturgeon researchers have sampled was 10 feet, 8 inches long and bottomed out a 500-pound scale.
White sturgeon can live to be more than 100 years old. DuPont said it's difficult to tell if the big fish from his most recent research trip are that old.
DuPont said, based on the growth rates researchers are seeing now, their age is largely dependent on whether they lived in Lower Granite Reservoir for part of their life or not.
"If they lived in the reservoir, they are likely around 70-90 years old," he said. "But if they lived in the river their entire life, they would be over 100 years old!"
DuPont has the following tips for anglers who want to go after big sturgeon:
Use heavy line. We like to use 60-pound test mono for the main line with 80-pound test leaders. Although you can fish with heavy braid (150-pound plus), I don't like to use it because when it wraps around fish it can cut into them.
If you hook a big fish, it is important that you follow it closely with the boat. It is almost impossible to land a 10-footer from shore. You will often have to fight fish of this size for over an hour, and if you don't keep the boat above it to keep the line off the bottom, the repeated wear on the line as the fish hugs the bottom will eventually cause you to break it off.
Use big hooks. DuPont says, "I prefer to use 12/0 circle hooks or 'J' hooks 10/0 or larger. I have found that with smaller hooks you often don't get a good bite into their lip, which will make it more likely that it will eventually pull out.