Partial
Replacement of Fish Meal with Meat-and-Bone Meal, Flash-Dried Poultry
By-Product Meal, and Enzyme-Digested Poultry By-Product Meal in Practical
Diets for Juvenile Red Drum
N. Kureshy, D.A. Davis, C.R. Arnold-2000
North
American Journal of Aquaculture, 62(4): 266-272
Abstract:
To reduce long-term dependence upon fishery
resources, we evaluated selected terrestrial by-products as alternatives to
fish meal for rearing juvenile (mean weight, 2.3 ± 0.1 g) red drum
Sciaenops ocellatus. Over a 6-week feeding trial, 10 test diets (basal diet
and 9 test diets) were formulated on an isonitrogenous (44% gross protein)
basis. The primary protein sources in the basal diet were fish meal and
soybean meal, which were incorporated at 30 and 24.8 g/100 g of diet,
respectively. Replacement of fish meal in the test diets ranged from 16.6%
to 66.7%. Low ash meat-and-bone meal (MBM), flash-dried poultry by-product
meal (PBM), and enzyme-digested poultry by-product meal (EPM) were used to
replace the fish meal. All four MBM diets produced significantly lower
weight gain compared with fish maintained on the basal diet. Feed efficiency
(FE) and protein conversion efficiency (PCE) were similar for the 16.6% MBM
diet and the basal diet, but higher levels of MBM produced significantly
lower FE and PCE values. The PBM and EPM diets did not show any significant
differences in percent weight gain, FE, or PCE compared with the basal diet.
Based on these results, the use of high quality poultry by-product meals is
a viable option in practical diets for red drum, whereas the MBM used in
this study was not acceptable as a replacement for fish meal.
(The University of Texas at Austin, Marine Science
Institute, 750 Channel View Drive, Port Aransas, Texas 78373-5015, USA)
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