This an exchange I had with TPW and was allowed to share on 2cool.
I was referred to this site to express my concerns regarding lake Livingston blue catfish of size. For over ten years I have guided on the lake and drifting for blues over twenty pounds catch and release. The catch rate for me and my friends who are accomplished big cat fishermen have all noticed a sharp decline in catching large blues. From relatively a sure thing to almost nothing. All I can do is express my thoughts but you may want to check with other folks such as commercial catfishermen etc.
Hi Mr. Deason, When we sampled the lake for blue catfish using gill nets in 2012 and in 2017, the blue catfish catch rates during these sampling events were relatively high and stable. Then earlier this year when we ran gill nets for blue catfish, we caught more blue catfish then we ever have on lake Livingston. This data shows us that the blue catfish fishery on lake Livingston is at least stable or possibly even increasing. The number of the blue catfish collected in these sampling events can be broken down as such: • In 2012, we gill netted 522 blue catfish total, and of those 522 fish, 163 of them were 12 inches or greater (stock size fish = 12 inches or greater), and of those 163 fish, 23 of them were 20 inches or greater (quality size fish = 20 inches or greater). • Then when we ran gill nets in 2017, we gill netted 431 blue catfish. Of the 431 fish, 292 (over half of fish gill netted) were 12 inches or greater, with 56 fish of the 292 that were 20 inches or greater. • This last year we gill netted 649 blue catfish, with 320 fish (almost half of the fish gill netted) being 12 inches or greater, and out of those 320 fish, 80 were 20 inches or greater. In summary: • 2012 - 163 stock size fish (12 inches or greater), 23 quality size fish (20 inches or greater) • 2017 - 292 stock size fish, 56 quality size fish • 2021 - 320 stock size fish, 80 quality size fish This shows us that each year we are catching more stock size fish, along with more quality size fish. The stock size fish are fish that we assume will survive and reproduce, contributing to the fishery. The first year, less than a quarter of fish caught were stock size fish, and out of the last two sampling events (2017, 2021) roughly half of the fish caught were stock size fish. These stock size fish are fish that are mature and can reproduce, contributing to the fishery. So as time goes on, we are seeing more stock size fish, which tells us the blue catfish fishery on Livingston is stable and steadily growing. Also, we are seeing more quality size fish (20 inches or greater) with each sampling event: 2012 - 23 fish, 2017 - 56 fish, 2021 - 80 fish; showing that the number of quality size fish is increasing. Quality size fish are fish that anglers would consider a good quality catch. Furthermore, the relative weight (measure of plumpness) for the blue catfish in these sampling events has had roughly an average of 90% meaning these fish were healthy. With us seeing higher catch rates in our sampling events, good relative weights (plump fish), and the proportional size density (stock and quality fish) increasing we should see the blue catfish fishery grow in a positive manner. Per your original comments and questions, you specifically referred to blue catfish over 20 pounds (or fish around 35 inches in length). With our gill netting surveys, we have never caught very many fish over 20 pounds at Livingston, or at any of our other blue catfish fisheries like Sam Rayburn and Toledo Bend. So we simply don’t have adequate data to examine the population status of blue catfish over 20 pounds. We can’t say whether abundance of these large fish is increasing or decreasing. When it comes to the sedimentation problem on Livingston, no question this is a huge issue. Unfortunately, Lake Livingston is a prime example of rapid reservoir aging. The Trinity River carries a huge sediment load, and once the river reaches the upper end of the reservoir, the water flow or current slows down enough for the suspended sediment to fall out and settle on the bottom, particularly during high flow flood events. This problem is on such a massive scale at Livingston that there are no practical or affordable solutions. Dredging is a theoretical option, but it is very costly and labor-intensive. Dredged areas would only silt in again over time. I hope this helps with your thoughts. Thank you for reaching out to us, please continue to do so if you have more questions about your fisheries. Best, Jasper Management Office
I was referred to this site to express my concerns regarding lake Livingston blue catfish of size. For over ten years I have guided on the lake and drifting for blues over twenty pounds catch and release. The catch rate for me and my friends who are accomplished big cat fishermen have all noticed a sharp decline in catching large blues. From relatively a sure thing to almost nothing. All I can do is express my thoughts but you may want to check with other folks such as commercial catfishermen etc.
Hi Mr. Deason, When we sampled the lake for blue catfish using gill nets in 2012 and in 2017, the blue catfish catch rates during these sampling events were relatively high and stable. Then earlier this year when we ran gill nets for blue catfish, we caught more blue catfish then we ever have on lake Livingston. This data shows us that the blue catfish fishery on lake Livingston is at least stable or possibly even increasing. The number of the blue catfish collected in these sampling events can be broken down as such: • In 2012, we gill netted 522 blue catfish total, and of those 522 fish, 163 of them were 12 inches or greater (stock size fish = 12 inches or greater), and of those 163 fish, 23 of them were 20 inches or greater (quality size fish = 20 inches or greater). • Then when we ran gill nets in 2017, we gill netted 431 blue catfish. Of the 431 fish, 292 (over half of fish gill netted) were 12 inches or greater, with 56 fish of the 292 that were 20 inches or greater. • This last year we gill netted 649 blue catfish, with 320 fish (almost half of the fish gill netted) being 12 inches or greater, and out of those 320 fish, 80 were 20 inches or greater. In summary: • 2012 - 163 stock size fish (12 inches or greater), 23 quality size fish (20 inches or greater) • 2017 - 292 stock size fish, 56 quality size fish • 2021 - 320 stock size fish, 80 quality size fish This shows us that each year we are catching more stock size fish, along with more quality size fish. The stock size fish are fish that we assume will survive and reproduce, contributing to the fishery. The first year, less than a quarter of fish caught were stock size fish, and out of the last two sampling events (2017, 2021) roughly half of the fish caught were stock size fish. These stock size fish are fish that are mature and can reproduce, contributing to the fishery. So as time goes on, we are seeing more stock size fish, which tells us the blue catfish fishery on Livingston is stable and steadily growing. Also, we are seeing more quality size fish (20 inches or greater) with each sampling event: 2012 - 23 fish, 2017 - 56 fish, 2021 - 80 fish; showing that the number of quality size fish is increasing. Quality size fish are fish that anglers would consider a good quality catch. Furthermore, the relative weight (measure of plumpness) for the blue catfish in these sampling events has had roughly an average of 90% meaning these fish were healthy. With us seeing higher catch rates in our sampling events, good relative weights (plump fish), and the proportional size density (stock and quality fish) increasing we should see the blue catfish fishery grow in a positive manner. Per your original comments and questions, you specifically referred to blue catfish over 20 pounds (or fish around 35 inches in length). With our gill netting surveys, we have never caught very many fish over 20 pounds at Livingston, or at any of our other blue catfish fisheries like Sam Rayburn and Toledo Bend. So we simply don’t have adequate data to examine the population status of blue catfish over 20 pounds. We can’t say whether abundance of these large fish is increasing or decreasing. When it comes to the sedimentation problem on Livingston, no question this is a huge issue. Unfortunately, Lake Livingston is a prime example of rapid reservoir aging. The Trinity River carries a huge sediment load, and once the river reaches the upper end of the reservoir, the water flow or current slows down enough for the suspended sediment to fall out and settle on the bottom, particularly during high flow flood events. This problem is on such a massive scale at Livingston that there are no practical or affordable solutions. Dredging is a theoretical option, but it is very costly and labor-intensive. Dredged areas would only silt in again over time. I hope this helps with your thoughts. Thank you for reaching out to us, please continue to do so if you have more questions about your fisheries. Best, Jasper Management Office