Submitted to: Book of Abstracts World Aquaculture Society
Publication Type: Abstract Only
Publication Acceptance Date: January 14, 2003
Publication Date: February 18, 2003
Citation: Rawles, S.D., Gaylord, T.G. Apparant protein, lipid, energy and organic matter digestibility from animal products, blended products and plant products for hybrid striped bass. Book of Abstracts World Aquaculture Society. 2003. [abstract] p.437. Technical Abstract: In order to more accurately formulate feeds for hybrid striped bass, data on the availability of nutrients from feedstuffs are needed to compliment information on the nutritional requirements of this taxa. A pair of experiments were performed utilizing ingredient substitution methodologies in extruded diets to address the protein, lipid, energy and organic matter digestibilities from an assortment of commercially available animal and plant feedstuffs as well as a set of blended products sold as fishmeal replacements. The animal products tested were: ring dried blood meal, poultry by-product meal, and fish solubles. The blended products tested were: PRO-PAK¿, PRO-PAK-65¿, ProCon¿ 65RDB, and Fish meal concentrate 60. The plant products tested were: brewer's yeast, canola meal, corn gluten feed, peanut meal, expelled soybean meal, and solvent extracted sunflower meal. Crude protein digestibility for the animal and blended products ranged from 47 to 70% with no statistical differences detected among the products. Lipid digestibilities among these products also were not different and ranged from 49 to 79%. Energy digestibility of fish solubles was notably higher at >100%. Organic matter digestibility for these products followed the same trend as energy digestibility. Differences in protein digestibility among the plant products were more pronounced. Peanut meal protein digestibility was 80% while the expelled soybean meal and corn gluten feed were much lower at 32 and 30%, respectively. Lipid digestibility was moderate to high among plant products ranging from 68 to 92% with no discernable differences. Energy digestibility was low for all plant products with peanut meal being the highest at 52%. Organic matter digestibility from these products followed a similar trend to energy digestibility.