scholarly journals Juvenile bluegill ( Lepomis macrochirus ) can be fed diets without marine fish meal without adverse effects on growth, survival, diet utilization, and body composition

2021 ◽  
Author(s):  
Carl D. Webster ◽  
Steven D. Rawles ◽  
Anita M. Kelly ◽  
Luke A. Roy ◽  
Kurt A. Rosentrater
Keyword(s):  
Body Composition ◽  
Adverse Effects ◽  
Marine Fish ◽  
Fish Meal ◽  
Lepomis Macrochirus

Body chemical composition of churra lambs at 20kg live-weigth: effect of level of milk-intake and Protein content in the post-weaning diet

1994 ◽  
Vol 1994 ◽  
pp. 212-212
Author(s):  
T. Manso ◽  
A.R. Mantecó ◽  
T. Castro ◽  
P. Lavin
Keyword(s):  
Body Composition ◽  
Chemical Composition ◽  
Compensatory Growth ◽  
Fish Meal ◽  
Energy Content ◽  
Barley Grain ◽  
Milk Intake ◽  
Period 2 ◽  
Ad Libitum Intake ◽  
Composition Changes

Body composition changes in animals undergoing compensatory growth and these response vary with the age or stage of maturity at which the restriction is applied and with the undegradable protein in the diet during post-restriction period (O'Donovan, 1984; Ryan, 1990).This experiment was conducted to determine the effect of level of intake during milk-fed period and the energy/protein relationship during post-weaning period on changes in carcass, non-carcass and empty body weigth (EBW) components in lambs slaughtered at 20 Kg live weigth (LW).A total of 16 lambs of Churra breed were used in a comparative slaughter experiment to determinate the effect of level of intake during milk-fed period (4 weeks) and the protein supplement in the diet during post-weaning period on chemical body composition at 20 Kg LWThe lambs were assigned to a 2×2×4 factorial design, defined by 2 levels of milk intake (High: 1.5 MJ GE/Kg LW°75/day and Low: 0.9 MJ GE/kg LW°75/day) during milk-fed period, 2 post-weaning concentrate supplements (HP: barley grain plus 200g/kg fish meal and LP: barley) and 4 lambs per treatment.All lambs were individually penned. During post-weaning period low quality hay and concentrate were independently offered ad libitum. Intake and LW were recorded daily and three times a week respectively. At slaughter (20Kg LW), EBW was estimated and carcass and non-carcass chemical composition (water, fat, ash and protein) and energy content was measured.

Fish-meal supplementation of grass silage offered to young steers: Effects on growth, body composition and nutrient efficiency

2001 ◽  
Vol 137 (1) ◽  
pp. 85-96 ◽  
Author(s):  
R. SANDERSON ◽  
M. S. DHANOA ◽  
C. THOMAS ◽  
A. B. McALLAN
Keyword(s):  
Body Composition ◽  
Body Weight ◽  
Weight Gain ◽  
Fish Meal ◽  
Body Weight Gain ◽  
Live Weight ◽  
Metabolizable Energy ◽  
Energy Utilization ◽  
Whole Body ◽  
Nitrogen Intake

Growth and efficiencies of nitrogen and energy utilization for growth by 72 young British Friesian steers (initial live weight (LW) 110 kg) offered a well preserved, formic acid-treated, perennial ryegrass silage with and without supplements of fish meal were examined. Silage was offered either alone or mixed with 50, 100 or 150 g fish meal/kg silage dry matter (DM) and each diet was offered either ad libitum or intakes were restricted to 16, 19 or 22 g dietary DM/kg LW/day. Treatments were imposed over a period of 132 days. Body component weight gains were determined by comparative slaughter.Increasing the level of either feeding or fish meal increased rates of empty body weight gain linearly (P<0·001) and curvilinearly (P<0·05) respectively. Fish-meal supplementation increased rates of ash and crude protein gain (P<0·001) but, in comparison with the curvilinear response to increasing level of feeding (P<0·001), had small linear effects on fat gain (P>0·01). Consequently, in terms of whole body composition, animals given fish meal were leaner than animals offered silage alone. Fish-meal supplementation had no significant effect on the composition of the carcass but increased the concentration of protein in the liver and gastrointestinal tract.The increase in nitrogen intake associated with feeding fish meal resulted in a reduction in the efficiency of nitrogen utilization as level of fish meal increased. Nitrogen intake required for maintenance was estimated to be 1·054 g/kg LW0·75. In spite of marked differences in the composition of the empty body-weight gain, there was no evidence to support an effect of fish meal on the efficiency of metabolizable energy (ME) utilization for growth (kf) which was estimated to be 0·346 on the basis of data scaled by LW0·75. ME intake required for maintenance (MEm) was estimated to be 0·536 and 0·502 MJ/kg LW0·75 for silage alone and the 150 g fish-meal level respectively.

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