Aquaculture 2025

March 6 - 10, 2025

New Orleans, Louisiana USA

Add To Calendar 07/03/2025 14:15:0007/03/2025 14:35:00America/ChicagoAquaculture 2025DIET INFLUENCES SURVIVAL AND GROWTH OF INTENSIVELY REARED LARVAL SAUGEYE Sander vitreus × S. canadensisBalcony MThe World Aquaculture Societyjohnc@was.orgfalseDD/MM/YYYYanrl65yqlzh3g1q0dme13067

DIET INFLUENCES SURVIVAL AND GROWTH OF INTENSIVELY REARED LARVAL SAUGEYE Sander vitreus × S. canadensis

Gregory J. Fischer*, Tyler J. Firkus, Kendall Holmes, Patrick C. Blaufuss, Jon J. Amberg, Christopher F. Hartleb

 

 

McMillen Inc.

900 6th Avenue West

Ashland WI 54806

fischer@mcmillen.com

 



We evaluated the performance of five commercial microstarter diets (Otohime, Gemma Micro, Gemma Wean, Optimal Starter, and Omega One Fry) fed to first feeding larval saugeye Sander vitreus x S. canadensis. Triplicate tanks of 2,500 larvae (initial weight 2.6 ± 0.6 mg) were stocked at 4 days post-hatch and fed treatment diets for four weeks. Fish were randomly sampled each week to monitor growth and development. Superior growth performance was observed in fish fed Otohime and Gemma Micro and was statistically significant as early as 13 DPH. At the conclusion of the trial, fish fed Otohime and Gemma Micro were approximately 3.6 times heavier than fish fed Gemma Wean and Optimal Starter. Survival was highest in fish fed Otohime (39.7 ± 7.1%), with Gemma Micro performing second best (14.1 ± 3.3%). Survival of fish fed Omega One Fry was too low for analysis (0.70 ± 1.1). Incidence of deformity among the dietary treatments ranged from 0 - 10.7%, primarily manifesting as a malformation of the jaw. Our results highlight the importance of diet for successfully raising saugeye through the larval/juvenile stage, and provide key information for this critical bottleneck in percid culture.