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United States Department of Agriculture

Agricultural Research Service

Research Project: Improving Sustainability of Rainbow Trout Production by Integrated Development of Improved Grains, Feeds, and Trout

Location: Small Grains and Potato Germplasm Research

Title: Response of White Sea Bass to practical diets with varying levels of protein)

Author
item Jirsa, Dave
item Davis, Allen
item Barrows, Frederic
item Roy, Luke
item Drawbridge, Mark

Submitted to: North American Journal of Aquaculture
Publication Type: Peer reviewed journal
Publication Acceptance Date: 8/17/2013
Publication Date: 1/8/2014
Citation: Jirsa, D., Davis, A., Barrows, F., Roy, L., Drawbridge, M. 2014. Response of white sea bass to practical diets with varying levels of protein. North American Journal of Aquaculture. 76(1):24-27.

Interpretive Summary: The White Sea Bass is a popular sport fish on the western coast of the U.S. It is highly prized for the quality of its meat, so there is a lot of interest in raising these fish for food production. A study was conducted to get an estimate of optimal protein and fat levels for the diet. Fish grew the best when fed a diet containing 40% protein and 10% fat.

Technical Abstract: Interest in the commercial culture of White Sea Bass atractoscion nobilis on the western coast of the United States has been increasing in recent years. Despite this interest, there is a scarcity of knowledge on the dietary requirements of this species, particularly as it relates to basic nutrient requirements and selection of feeds. Hence, we evaluated a wide range of protein levels (31, 34, 37, 40, 43, and 46%) with practical lipid levels (5.75, 7, 8.25, 9.5, 10.75, and 12%) to initiate the development of a species-specific commercial diet for White Sea Bass. A 56-d trial was conducted in a recirculating system at Hubbs–SeaWorld Research Institute’s marine fish hatchery in Carlsbad, California. Diets were formulated to contain 20–30% fish meal and offered to juvenile White Sea Bass (3.6 g mean initial weight). At the conclusion of the growth trial final weights ranged from 13.9 to 15.9 g, and percent weight gain ranged from 278.2% to 345.6% and generally increased with protein level. Protein retention ranged from 25.2% to 33.7% and was significantly lower for fish offered the diets containing 43% and 46% protein. Based on growth and protein retention, the use of a diet incorporating 40% protein and 10% lipid is recommended for juvenile White Sea Bass.

Last Modified: 8/24/2016
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