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Luo L.,Beijing Fisheries Research Institute | Wang J.,Chinese Academy of Agricultural Sciences | Pan Q.,University of South China | Xue M.,Chinese Academy of Agricultural Sciences | And 3 more authors.
Aquaculture Research | Year: 2012

Nutrient apparent digestibility coefficients (ADCs) of pet food grade poultry by-product meal (PBM) were determined for black tiger prawn, Penaeus monodon and Pacific white shrimp, Litopenaeus vannamei by the indirect method (reference diet and test diet at 7:3 ratio). Subsequently, an 8-week growth trial was conducted to evaluate the effects of substitution of fishmeal (FM) with PBM in diets of P. monodon (initial weight = 0.21 ± 0.01 g). In the growth trial, six isonitrogenous and isoenergetic diets PBM0, PBM25, PBM50, PBM75, PBM100 and PBMA100, containing a gradient of PBM 0, 88.7, 177.4, 266, 354.7 and 354 g kg-1 to replace 0, 92.5, 185, 277.5, 370 and 370 g kg-1 FM were fed to four replicate groups respectively. The diet PBMA100 was supplemented with DL-Met to be similar to PBM0. The results showed that both P. monodon and L. vannamei had relatively high ADC of crude protein (77.6% and 84.2% respectively) and gross energy (72.8% and 84.0% respectively) for PBM. Litopenaeus vannamei showed significantly higher digestion ability for PBM than P. monodon (P < 0.05). In growth trial, no significant difference in growth performance was observed among shrimp fed the experimental diets. DL-Met supplementation did not improve the growth of P. monodon. PBM is a suitable protein ingredient for P. monodon feeds and can be used up to 354.7 g kg-1 to totally replaced FM. © 2011 Blackwell Publishing Ltd.

Wang Y.,Zhejiang University | Wang F.,Shanghai Ocean University | Ji W.-X.,Zhejiang University | Han H.,Zhejiang University | And 2 more authors.
Aquaculture Research | Year: 2015

This study evaluated the potential of using poultry by-product meal (PBM) to replace fish meal in diets for Japanese sea bass, Lateolabrax japonicus. Fish (initial body weight 8.5 g fish-1) were fed six isoproteic and isoenergetic diets in which fish meal level was reduced from 400 g kg-1 (diet C) to 320 (diet PM1), 240 (diet PM2), 160 (diet PM3), 80 (diet PM4) or 0 g kg-1 (diet PM5), using PBM as the fish meal substitute. The weight gain (WG), specific growth rate, nitrogen retention efficiency, energy retention efficiency and retention efficiency of indispensable amino acids were higher in fish fed PM1, PM2, PM3 and PM4 diets than in fish fed diets C or PM5. The phosphorus retention efficiency was lower in fish fed PM3, PM4 and PM5 diets than in fish fed C, PM1 or PM2 diets. Fish fed diet PM5 had the highest feed conversion ratio, total nitrogen waste output (TNW) and total phosphorus waste output (TPW) among the treatments. No significant differences were found in the hepatosomatic index or body contents of moisture, lipid and ash among the treatments. Fish fed diet C had lower condition factor and viscerosomatic index than those of fish fed PM1, PM3, PM4 and PM5 diets. The results of this study indicate that using fish meal and PBM in combination as the dietary protein source produced more benefits in the growth and feed utilization of Japanese sea bass than did using fish meal or PBM alone as the dietary protein source. The dietary fish meal level for Japanese sea bass can be reduced to 80 g kg-1 if PBM is used as a fish meal substitute. Copyright © 2015 John Wiley & Sons Ltd.

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