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United States Department of Agriculture

Agricultural Research Service

Research Project: IMPROVING THE VALUE AND UTILIZATION OF ETHANOL MANUFACTURING CO-PRODUCTS

Location: North Central Agricultural Research Laboratory

Title: Yellow perch nutrient utilization and performance fed grower diet formulations with fermented soybean concentrate

Authors
item Von Eschen, Aaron -
item Brown, Michael -
item Rosentrater, Kurt

Submitted to: Meeting Abstract
Publication Type: Abstract Only
Publication Acceptance Date: October 1, 2010
Publication Date: December 12, 2010
Citation: Von Eschen, A.J., Brown, M., Rosentrater, K.A. 2010. Yellow perch nutrient utilization and performance fed grower diet formulations with fermented soybean concentrate. 71st Midwest Fish and Wildlife Conference, Minneapolis MN, December 12-16, 2010.

Interpretive Summary: Five feeds were formulated with fermented soybean concentrate (FSBC) at five fish-meal replacement levels (0%, 25%, 50%, 75% and 100%). These blends were processed into pellets using a pilot-scale Wenger twin screw extruder with a 1.9 cm diameter circular die. After processing, they were fed to juvenile yellow perch. All pelleted diets exhibited high durability and excellent water stability. After a 105-d feeding trial, fish survival, feed conversion efficiency, feed consumption, and dress-out percentage were determined. No mortalities were observed during the feeding trial, which indicated that diet composition had no impact on survival. Growth rates declined with increasing FSBC protein content. Feed efficiency also declined with increasing FSBC protein content. Feed consumption, on the other hand, was not significantly different among experimental diets. Diet composition did have a significant impact on dress-out percentage of the fish as well. Based on growth rates and feed efficiency, a diet consisting of more than 25% FSBC protein (without amino acid supplements) is not practical for production of yellow perch. This information adds to current research towards developing a suitable, more sustainable replacement for fish meal and providing more economical diets for yellow perch production.

Technical Abstract: Feeds formulated with fermented soybean concentrate (FSBC) were processed using a pilot-scale Wenger twin screw extruder, using a 1.9 cm diameter circular die, and then fed to juvenile yellow perch (Perca flavescens) (~26g) as a protein replacer for fish meal protein. Four fish-meal replacement levels (25%, 50%, 75% and 100%) using FSBC without amino acid supplements were compared with a fish meal control diet. All pelleted diets exhibited high durability (96.7% to 98.8%) and excellent water stability (> 30 min). Survival, feed conversion efficiency (FCE), feed consumption, and dress-out percentage were determined after a 105-d feeding trial; growth was measured every 21 days. No mortalities were observed during the feeding trial indicating that diet composition had no impact on survival. Growth rates were significantly different (F = 31.3, df 4, 19, P < 0.01) and negatively correlated with increasing FSBC protein content (r = -0.93, P < 0.01). Feed efficiency was also significantly different (F = 16.4, df 4, 19, P < 0.01) and negatively correlated with increasing FSBC protein content (r = -0.88, P < 0.01). Consumption was not significantly different among experimental diets (F=2.76, df 4, 19, P=0.06), although it was negatively correlated with increasing FSBC protein content (r = -0.61, P > 0.05). Diet composition had a significant impact on dress-out percentage of fish (F = 3.01, df 4, 19, P = 0.04). Based on growth rates and feed efficiency, a diet consisting of >25% FSBC protein without amino acid supplements is not practical for production of yellow perch. This information adds to current research towards developing a suitable, more sustainable replacement for fish meal and providing more economical diets for yellow perch production.

Last Modified: 7/22/2014
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