Lake Grapevine Experiences Substantial Fish Kill

Lake Grapevine Experiences Substantial Fish Kill

High temps, low oxygen pointed to in deaths

Fort Worth — As daytime temperatures remain above 100 degrees, Texas Parks and Wildlife Department Inland Fisheries biologist received a call Tuesday, August 30 regarding a large number of dead fish near the Silver Lake Marina – in a cove near the dam at Lake Grapevine. Water is a very interesting medium: as the temperature increases, the solubility of gases (specifically oxygen) decreases. With this in mind, fish are more likely to die of low oxygen stress when water temperatures are elevated because less dissolved oxygen is held in warm water and the fish’s metabolic requirements for oxygen are increased as temperature increases.

Dissolved oxygen levels were just 1.2 parts per million (ppm) Tuesday morning. Oxygen levels below 3 ppm can cause fish to become stressed and die. “The fish kill affected several species including gizzard and threadfin shad, bluegill, white bass, freshwater drum, largemouth bass, smallmouth bass, and white crappie,” said TPWD fisheries biologist Tom Hungerford. “By far the most abundant fish were the shad species,” Hungerford added.

TPWD staff conducted counts along transects to estimate the total number of fish impacted. “Based on our transects we estimated the total number of fish lost at 124,360 with 98.8% being threadfin shad,” said TPWD Kills and Spills biologist Melissa Dudley. “Less than 1% of fish observed were game fish,” she added. Additionally, a water sample was also collected and analyzed to rule out harmful algal blooms. The extreme temperatures and severe drought have impacted the amount and quality of water throughout Texas.

Recommended for You

Experts agree record channel cat caught in 1949 was actually a blue catfish. Records

Upon Further Review: 70-Year-Old Catfish Record Voided

G&F Online Staff - May 22, 2019

Experts agree record channel cat caught in 1949 was actually a blue catfish.

Try these tips to improve your wild boar hunting skill set. Hogs

Quick Tips: How to Spot and Stalk a Hog

Ian Nance - May 28, 2019

Try these tips to improve your wild boar hunting skill set.

Perfect for competition or a day at the range. Other Hunting

New Gear: MidwayUSA Competition Range Bag

G&F Staff

Perfect for competition or a day at the range.

See More Recommendations

Popular Videos

Lure Lock Options Includes LED Light Boxes & More

Lure Lock Options Includes LED Light Boxes & More

Pro angler Jonathan VanDam showcases new offerings at ICAST 2019, including the ultra-thin, big bait boxes, LED-lighted boxes and backpack-able gear lockers. With Game & Fish Editorial Director Adam Heggenstaller at ICAST 2019 in Orlando.

New Spinning Reel for Finesse Fishermen

New Spinning Reel for Finesse Fishermen

As Pure Fishing's Andrew Upshaw explains, reel making giant Abu Garcia has done it again at ICAST 2019 with a new spinning reel geared towards finesse fishermen.

Mustad

Mustad's New Tungsten Weights

Long known as one of the world's premiere hook makers, Mustad's Reid McKinstry shows OSG's Lynn Burkhead that the company is now one of the leaders in making tungsten terminal tackle products for anglers.

See more Popular Videos

Trending Stories

Dozens of different bait types are commonly used for catfish, including these great options. Catfish

12 Great Catfish Baits

Jeff Samsel

Dozens of different bait types are commonly used for catfish, including these great options.

As most catfish anglers know, blue cats, channel cats and flatheads will eat darn near anything that fits in their mouths. Catfish

5 Ways To Catch Catfish on Lures

Keith Sutton - September 16, 2015

As most catfish anglers know, blue cats, channel cats and flatheads will eat darn near...

Who needs live bait when the big 'gills are so eager to strike these lures? Other Freshwater

5 Great Lures For Bluegills

Stephen D. Carpenteri - March 10, 2011

Who needs live bait when the big 'gills are so eager to strike these lures?

See More Stories

GET THE MAGAZINE Subscribe & Save

Temporary Price Reduction

SUBSCRIBE NOW

Give a Gift   |   Subscriber Services

PREVIEW THIS MONTH'S ISSUE

GET THE NEWSLETTER Join the List and Never Miss a Thing.