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RAISING ADVANCED EXTENDED GROWTH WALLEYES IN NORTHERN WISCONSIN

This project focuses on the collection and treatment of walleye eggs in Northern Wisconsin, using UV-treated water and iodine disinfection methods to enhance hatching success rates. Results show that iodine-treated eggs had successful hatching rates ranging from 25% to 75%, outperforming untreated control eggs which averaged 63% success. Two successful methods involved water hardening fertilized eggs in iodine and a short iodine bath, both achieving a 75% hatching success rate. The project also observed a 60% fingerling pond survival rate for walleye, with fish sizes at 33mm and stocking density of 1000 fish per pound. Key partners in this project included LCO, Red Cliff Fish Hatchery, Wisconsin bait dealers, and WiDNR (Spooner hatchery crew).

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RAISING ADVANCED EXTENDED GROWTH WALLEYES IN NORTHERN WISCONSIN

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  1. RAISING ADVANCED EXTENDED GROWTH WALLEYES IN NORTHERN WISCONSIN

  2. Walleye Egg Collection and Transport

  3. Walleye Egg Collection and Transport

  4. Walleye Project Egg Incubation and Treatment • In 2007 due to concerns with VHS: • Used UV treated water • Disinfected eggs with 100/ppm iodine several ways

  5. Walleye Project Egg Incubation and Treatment • RESULTS • Iodine treated egg hatching success rate ranged from • 25% to 75% depending on treatment. • Untreated control eggs hatching success averaged 63%.

  6. Walleye Project Egg Incubation and Treatment RESULTS • Two most successful methods at NADF were : • Water hardening fertilized eggs in iodine for • approximately 45-60 minutes. • Placing fertilized water hardened eggs in a 10 • minute bath of iodine. • Both methods resulted in 75% hatching success rate

  7. Walleye Project Egg Incubation and Treatment FRYSURVIVAL

  8. Walleye Project – Fingerling Pond Survival Average Survival was 60% Fish size: 33mm – 1000 fish/lb

  9. Project Partners: LCO, Red Cliff Fish Hatchery, WI baitdealers, WiDNR (Spooner hatchery crew) QUESTIONS??????????????

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