scholarly journals Effects of Early Feed Restriction on the Occurrence of Compensatory Growth, Feed Conversion Efficiency, Leg Abnormality and Mortality in Unsexed Broiler Chickens Reared in Cages

2002 ◽  
Vol 15 (9) ◽  
pp. 1319-1325 ◽  
Author(s):  
U. Santoso
Keyword(s):  
Conversion Efficiency ◽  
Broiler Chickens ◽  
Compensatory Growth ◽  
Feed Restriction ◽  
Feed Conversion ◽  
Feed Conversion Efficiency

scholarly journals Dietary Green Seaweed Compromises Overall Feed Conversion Efficiency but not Blood Parameters and Meat Quality and Stability in Broiler Chickens

Agriculture ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 547
Author(s):  
Tumisang Ben Matshogo ◽  
Caven Mguvane Mnisi ◽  
Victor Mlambo
Keyword(s):  
Growth Performance ◽  
Meat Quality ◽  
Conversion Efficiency ◽  
Broiler Chickens ◽  
Live Weight ◽  
Blood Parameters ◽  
Feed Conversion ◽  
Feed Conversion Efficiency ◽  
Performance Improvements ◽  
Green Seaweed

Using seaweeds as sources of nutrients and beneficial bioactive compounds can promote sustainable production of functional poultry products. This study investigated the physiological and meat quality responses of Cobb 500 broiler chickens to graded levels of green seaweed (Ulva sp.) meal (SWM). Three hundred, two-week-old male chicks (159.3 ± 11.76 g live-weight) were randomly assigned to five diets formulated by diluting a standard broiler diet with SWM at 0 (SW0), 20 (SW20), 25 (SW25), 30 (SW30) and 35 g/kg (SW35). There were neither linear nor quadratic trends (p > 0.05) for overall feed intake, overall growth performance and carcass and meat quality traits. Overall feed conversion efficiency (R2 = 0.192, p = 0.018) and spleen weights (R2 = 0.182; p = 0.020) linearly declined as SWM levels increased. Linear and quadratic responses (p > 0.05) were observed for lymphocytes. There were linear effects for meat pH except on day 7 of storage. Meat lightness (L*) linearly increased whereas meat redness (a*) quadratically responded to SWM levels (day 3 of storage). While an optimum inclusion level could not be established for seaweed based on growth performance, improvements in some meat shelf life indicators were observed in the broilers reared on seaweed-containing diets.

scholarly journals Compensatory growth of Malaysian prawns reared at high densities during the nursery phase

2011 ◽  
Vol 40 (4) ◽  
pp. 701-707 ◽  
Author(s):  
H.L.A. Marques ◽  
J.V. Lombardi
Keyword(s):  
Growth Rate ◽  
Relative Growth Rate ◽  
Conversion Efficiency ◽  
Crude Protein ◽  
Compensatory Growth ◽  
Macrobrachium Rosenbergii ◽  
Average Weight ◽  
Feed Conversion ◽  
Relative Growth ◽  
Feed Conversion Efficiency

The objective of this work was to verify the occurrence of compensatory growth in Malaysian prawn (Macrobrachium rosenbergii) reared in pens, after being stocked in cages under high densities during nursery phase. The experiment was carried out in 0.5 m² cages and 2-m² pens set in natural bottom pond with 2,400 m². Prawn post-larvae (PL) with an average weight of 0.026 ± 0.012 g (nursery phase) were initially stocked in 16 cages at the densities of 50, 400, 800 and 1,200 PL m-2. Sixty days later, prawns were transferred to 16 growing pens, at the density of 12 prawns m-2. Initial average weight of the prawn in this phase was the final average weight registered in the nursery phase, as follows: 50 PL m-2 = 2.3 ± 0.3 g; 400 PL m-2 = 0.5 ± 0.03 g; 800 PL m-2 = 0.3 ± 0.05 g and 1,200 PL m-2 = 0.1 ± 0.01 g. Commercial rations for prawns (35% crude protein) were given once a day, in the afternoon. After 244 days, survival, average weight and biomass did not differ significantly among prawns with different initial average weight. Relative growth rate was significantly greater in prawns previously stocked at 1,200 PL m-2 and feed conversion efficiency was significantly better for those previously stocked at 400 and 1,200 PL m-2. These results suggest the existence of partial compensatory growth in M. rosenbergii, what can successfully carry on stocking of prawns of this species at high densities in the nursery phase.

scholarly journals A study of the effect of homoeopathic treatment on the food conversion, mortality rates and incidence of infectious coryza and related respiratory syndromes in broiler chickens

1998 ◽  
Author(s):  
◽  
Jacqueline Pollock
Keyword(s):  
Life Span ◽  
Conversion Efficiency ◽  
Broiler Chickens ◽  
Mortality Rates ◽  
Food Conversion ◽  
Feed Conversion ◽  
Feed Conversion Efficiency ◽  
Infectious Coryza

During the six-week life span of broiler chickens, stress, vaccination reactions and disease may lead to poor feed conversion efficiency and increased mortality rates. The purpose of this study was to determine whether homoeopathic medicines would influence the feed conversion efficiency, mortality rates and incidence of infectious coryza and related respiratory syndromes in broiler chickens.

Effects of dietary inclusion of lysolecithin from rice bran oil on performance, serum biochemical profile, organ weights, immune response and nutrient digestibility in broiler chicken

2017 ◽  
Author(s):  
M.V. L.N. Raju ◽  
P. P. Chakrabarti ◽  
S. V. Rama Rao ◽  
B.V. S.K. Rao ◽  
A. K. Panda ◽  
...  
Keyword(s):  
Body Weight ◽  
Conversion Efficiency ◽  
Rice Bran ◽  
Broiler Chickens ◽  
Broiler Chicken ◽  
Rice Bran Oil ◽  
Feed Conversion ◽  
Organ Weights ◽  
Feed Conversion Efficiency ◽  
Fat Digestibility

The possibility of using lysolecithin from rice bran oil (LL) in the diet of broiler chickens was explored. Lysolecithin was included in diet at graded levels (0, 0.05, 0.1, 0.2, 0.4, 0.8, 1.6 and 3.2 % in diet) and fed to a total of 640 broiler chickens from 0 to 35 d of age. The diets were isonitrogenous and isocaloric. Body weight was higher in the group fed the highest level (3.2 %) of LL. Feed intake was significantly (p less than 0.01) lower in the groups fed 1.6 and 3.2 % LL in comparison to control, whereas feed conversion efficiency was significantly (p less than 0.01) improved at the highest level of LL (3.2 %). Serum concentration of protein, total cholesterol and triglycerides as well as slaughter parameters, organ weights, fat deposition in liver and muscle, and SRBC response were not affected. The fat digestibility was significantly (p less than 0.05) improved at the higher levels (1.6 and 3.2 %) of LL in diet. It is concluded that rice bran oil LL could be safely used in broiler chicken diet and at dietary levels of > 1.6 % the LL improved the body weight, feed conversion efficiency and fat digestibility in broiler chickens.

Whole-grain feeding for chicken-meat production: possible mechanisms driving enhanced energy utilisation and feed conversion

2015 ◽  
Vol 55 (5) ◽  
pp. 559 ◽  
Author(s):  
Sonia Yun Liu ◽  
Ha H. Truong ◽  
Peter H. Selle
Keyword(s):  
Conversion Efficiency ◽  
Feed Efficiency ◽  
Broiler Chickens ◽  
Chicken Meat ◽  
Meat Production ◽  
Whole Grain ◽  
Feed Conversion ◽  
Feed Conversion Efficiency ◽  
Causative Factors ◽  
Feed Costs

The practice of offering some whole grain to broiler chickens alongside a balancing concentrate is meeting increasing acceptance in certain regions, including Europe, Canada and Australia. Whole-grain feeding (WGF) regimes provide economic advantages by effectively reducing feed costs but, to varying extents, WGF regimes also generate improvements in energy utilisation and feed conversion efficiency. However, the context in which these improvements are best realised has yet to be defined adequately. The outstanding response to WGF is the development of heavier relative gizzard weights; however, the causative factors and biophysical and biochemical consequences of heavier, and presumably more functional, gizzards have not been properly investigated. It follows that heavier gizzards would enhance the initiation of protein digestion by pepsin and hydrochloric acid and facilitate amylase-induced starch digestion in the small intestine by the prior physical disruption of starch granules. However, it appears that improvements realised by WGF in energy utilisation and feed efficiency cannot be attributed entirely to heavier gizzards. One alternative or additional possibility is that WGF may influence starch digestive dynamics and provide more gradually or slowly digestible starch, which would benefit energy utilisation and feed efficiency. However, if this is the case, the genesis of this provision is not clear, although it may be associated with larger grain particle sizes and/or increased episodes of reverse peristalsis, but not retarded gut passage rates. The present paper reviews the essentially positive impacts of WGF on energy utilisation and feed conversion efficiency and considers the contexts in which these responses may be best realised and the possible mechanisms driving better performance under WGF regimes for chicken-meat production.

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