scholarly journals Dietary or in ovo Saccharomyces cerevisiae Supplementation Developed Growth, Caecal Microbiota and Gut Histology of Broiler Chicks

2018 ◽  
Vol 6 (7) ◽  
pp. 863 ◽  
Author(s):  
Salih Gülen ◽  
İsa Coşkun
Keyword(s):  
Saccharomyces Cerevisiae ◽  
Live Weight ◽  
Basal Diet ◽  
Conversion Ratio ◽  
Feed Conversion Ratio ◽  
Feed Consumption ◽  
Broiler Chicks ◽  
Feed Conversion ◽  
In Ovo ◽  
Treatment Groups

The aim of this study was to determine the effects of in ovo injection of Saccharomyces cerevisiae (SC) to fertile Ross 308 broiler eggs or dietary supplementation on growth performance, internal organ development, gut histomorphology and cecum microbiota during 14 d of growing period. This study was designed as 2×2 factorial experimental design. Fertile 92 Ross 308 eggs were injected with SC solution 0.2ml at 18d of hatch and 90 eggs non-injected as control, afterward dietary SC supplementation was applied during the 14 d to broiler diet. In this study, 160 broiler chicks were used in four treatment groups at 10 replicate for each treatment group and 4 chicks for each replicates. Treatment groups were A) in ovo SC injection + dietary SC supplementation, B) in ovo SC injection + basal diet, C) no injection + dietary SC supplementation, D) no injection + basal diet as control. Live weight, feed consumption, feed conversion ratio and gut histomorphology, caecum microbiota, internal organ weight were recorded at 14 days of age. Live weight gain increased in C group than in the D group. Feed consumption, feed conversion ratio and internal organ weights were not affected by the treatments. Villi length and villi width increased in A group among the other treatment groups in jejunum, villi length increased in A and C groups among the other groups in ileum. Villi length/villi width ratio increased in A group than in the D group in ileum, was not different in jejunum. LAB counts in caecum were higher in A group than those of C and D groups, but was not different from B group. Enterobactericaea count was lower in A and B group than in the D group, was not different from C group. To conclude, results showed that dietary Saccharomyces cerevisiae supplementation increased broiler growth at 14 day by increasing villi development and improving gut health.

The effects of in ovo pollen extract injection on growth parameters, ileal histomorphology and caecal microflora in fasted broiler chicks

2017 ◽  
Author(s):  
Isa Coskun ◽  
Firdevs Korkmaz ◽  
Aydin Altop ◽  
Huseyin Cayan ◽  
Gokhan Filik ◽  
...  
Keyword(s):  
Weight Gain ◽  
Growth Parameters ◽  
Live Weight ◽  
Conversion Ratio ◽  
Feed Conversion Ratio ◽  
Pollen Extract ◽  
Broiler Chicks ◽  
Feed Conversion ◽  
In Ovo ◽  
Treatment Groups

This study was carried out to determine the effects of in ovo pollen extract injection on growth parameters, ileal histomorphology, and caecal microflora of fasted broiler chicks. In this experiment, 2×2 factorial experimental design was used. One d old, 120 healthy broiler chicks were allocated to 4 treatment groups and 6 replicates (5 mixed sex chicks allocated each replicates). Treatment groups were: A) Pollen extract injection and 24 h fasting (P24); B) Pollen extract injection and 48 h fasting (P48), C) Control, no injection 24 h fasting (C24) and D) Control, no injection 48 h fasting (C48). The experiment lasted 21 days. Live weight, feed consumption, feed conversion ratio were recorded weekly. Ileal histomorphology, caecal microbiota, organ weight were recorded at 21th days of experiment. In ovo pollen extract injection did not affect hatchability rate. At the end of 21 days, in ovo pollen extract injection did not affect feed intake, live weight gain, feed conversion ratio, inner organ development and ileal villi width irrespective to fasting 24 h and 48 h. In ovo pollen extract injection increased ileal villi length, caecal lactic acid bacteria and Saccharomyces Cerevisiae count, decreased caecal Enterobactericaea count. In conclusion, in ovo pollen extract injection can be applied for broiler eggs to improve weight gain, better digestion and gut health.

scholarly journals PENGGANTIAN SEBAGIAN PAKAN DENGAN TEPUNG LIMBAH SAWI PUTIH (Brassica pekinensia L) TERHADAP PERFORMANS BROILER

ZOOTEC ◽  
2016 ◽  
Vol 37 (1) ◽  
pp. 8
Author(s):  
Claudia Mangelep ◽  
F. R. Wolayan ◽  
M. R. Imbar ◽  
I. M. Untu
Keyword(s):  
Chinese Cabbage ◽  
Broiler Chicken ◽  
Waste Product ◽  
Basal Diet ◽  
Conversion Ratio ◽  
Feed Conversion Ratio ◽  
Feed Consumption ◽  
Feed Conversion ◽  
Broiler Performance ◽  
Daily Gain

THE EFFECT OF PARTLY SUBSTITUTION OF DIET WITH WHITE CHINESE CABBAGE (Brasscia pekinensia L) WASTE PRODUCT ON BIOLOGICAL PERFORMANCE OF BROILER CHICKEN The present study was conducted to characterize the effect of white Chinese cabbage (Brasscia pekinensia L) waste product as an alternative feed source for broiler chicken.  The experiment was conducted at Faculty of Animal Husbandry’s experimetal station for 21 days using 60 MB-202 broiler chicken. The experiment was started at 21 days of age and terminated at 42 days of age. Birds were allocated to 20 experimental battery cage, 3 birds in each cage. Completely Randomized Design (CRD) with 5 treatments and 4 replications was employed to analyze experimental data. Treatment diets were formulated as follow: R0 = 100% basal diet and 0% white Chinese cabbage waste product; R1 = 95% basal diet and 5% white Chinese cabbage waste product; R2 = 90% basal diet and 10% white Chinese cabbage waste product; R3 = 85% basal diet and 15% white Chinese cabbage waste product; and R4 = 80% basal diet and 20% white Chinese cabbage waste product. Parameters measured were: 1) daily feed consumption; 2) daily gain; and 3) feed conversion ratio (FCR). The results of the study during which feed consumption (138,09-141,57g), weight gain (64,95-68,53g), and feed conversion (2,07-2,12). The results showed that partly substitution (up to 20%) of basal diet with white Chinese cabbage waste product gave non significant (P > 0.05) effect on feed consumption, daily gain, and feed conversion ratio (FCR) of broiler chicken. It can be concluded that white Chinese cabbage waste product can be used up to 20% feed gives good results on broiler performance. Key Words: Substitution, white Chinese cabbage waste product, broiler performance

scholarly journals Administration of Saccharomyces boulardii mafic-1701 improves feed conversion ratio, promotes antioxidant capacity, alleviates intestinal inflammation and modulates gut microbiota in weaned piglets

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
Wenxiu Zhang ◽  
Chengling Bao ◽  
Jian Wang ◽  
Jianjun Zang ◽  
Yunhe Cao
Keyword(s):  
Intestinal Inflammation ◽  
Animal Health ◽  
Dietary Treatment ◽  
Basal Diet ◽  
Saccharomyces Boulardii ◽  
Conversion Ratio ◽  
Feed Conversion Ratio ◽  
Feed Conversion ◽  
Weaned Piglets ◽  
Treatment Groups

Abstract Background Probiotics are used as a means to improve animal health and intestinal development. Saccharomyces boulardii is a well-known probiotic; however, few studies have examined the effects of S. boulardii on weaned piglet performance. Therefore, this 28-day study compared the effects of S. boulardii mafic-1701 and aureomycin in diets for weaned piglets on growth performance, antioxidant parameters, inflammation and intestinal microbiota. One hundred and eight piglets, weaned at 28 d of age (8.5 ± 1.1 kg), were randomly divided into the three dietary treatment groups with six pens and six piglets per pen (half male and half female). The dietary treatment groups were as follows: 1) basal diet (CON); 2) basal diet supplemented with 75 mg/kg aureomycin (ANT); 3) basal diet supplemented with 1 × 108 CFU/kg S. boulardii mafic-1701 (SB). Results Compared to CON group, SB group had higher feed efficiency (P < 0.05) in the last 14 d and lower diarrhea rate (P <  0.05) over the entire 28 d. Total superoxide dismutase in serum was markedly increased in SB group (P < 0.05). Moreover, compared with CON group, SB group decreased the levels of pro-inflammatory cytokines interleukin-6 (P <  0.01) and Tumor necrosis factor-α (P < 0.05) in jejunum. Supplementation of S. boulardii mafic-1701 increased the abundance of Ruminococcaceae_UCG_009 and Turicibacter (P < 0.05), whereas the abundance of unclassified_Clostridiaceae_4 was decreased (P < 0.05). Furthermore, S. boulardii mafic-1701 administration increased cecal concentration of microbial metabolites, isobutyrate and valerate (P < 0.05). Conclusions The improvement in feed conversion ratio, reduction in diarrhea rate in weaned piglets provided diets supplemented with S. boulardii mafic-1701 may be associated with enhanced antioxidant activity, anti-inflammatory responses and improved intestinal microbial ecology.

scholarly journals Effects of Herbal Essential Oil Mixture as a Dietary Supplement on Egg Production in Quail

2014 ◽  
Vol 2014 ◽  
pp. 1-4 ◽  
Author(s):  
Metin Çabuk ◽  
Serdar Eratak ◽  
Ahmet Alçicek ◽  
Mehmet Bozkurt
Keyword(s):  
Essential Oil ◽  
Dietary Supplement ◽  
Egg Production ◽  
Control Diet ◽  
Basal Diet ◽  
Conversion Ratio ◽  
Feed Conversion Ratio ◽  
Feed Conversion ◽  
Foeniculum Vulgare ◽  
Treatment Groups

One hundred and eighty 7-week-old laying quail were fed various diets over a 12-week period. The diets included a control diet (without essential oil mixture (EOM) or antibiotics (ANTs)), a basal diet including EOM (24 mg/kg feed), and a basal diet including an ANT (avilamycin, 10 mg/kg feed). Each treatment comprised 4 replications with 4 cages (15 quail per cage), amounting to 60 quail per treatment group. Diets (in mash form) and water were provided forad libitumconsumption. EOM consisted of 6 different essential oils derived from the following herbs: oregano (Origanumsp.), laurel leaf (Laurus nobilisL.), sage leaf (Salvia trilobaL.), myrtle leaf (Myrtus communis), fennel seeds (Foeniculum vulgare), and citrus peel (Citrussp.). In comparison with the control diet, adding supplements such as EOM and ANTs to the basal diet increased egg production in quail (P<0.001). However, egg production was similar between EOM and ANT treatment groups. Moreover, there were no differences between the treatment groups with regard to egg weight. Feed intake was not affected by EOM or ANT supplementation, whereas feed conversion ratio was significantly improved by EOM and ANT supplementation. Thus, we concluded that EOM has beneficial effects as a dietary supplement on egg production and feed conversion ratio.

Effect of wheat type grinding, heat treatment and phytase supplementation on growth efficiency and nutrient utilization of wheat-based diets for broilers

2008 ◽  
Vol 88 (1) ◽  
pp. 57-64 ◽  
Author(s):  
M. Afsharmanesh ◽  
T. A. Scott ◽  
F. G. Silversides
Keyword(s):  
Heat Treatment ◽  
Basal Diet ◽  
Growth Efficiency ◽  
Nutrient Utilization ◽  
Conversion Ratio ◽  
Feed Conversion Ratio ◽  
Metabolizable Energy ◽  
Heat Processing ◽  
Broiler Chicks ◽  
Feed Conversion

This experiment studied the effect of phytase and processing (heat treatment, grind size) on performance and nutrient utilization of broilers fed diets from 1 to 21 d that included hardred spring (HRS) and durum wheat with three grind sizes (470, 560, 630 µm) with or without heat treatment (oven dry at 80°C for 15 h) before supplementation with phytase (Natuphos® 0 or 600 FTU kg-1). All 24 diets contained 0.5 g Avizyme 1302 kg-1 and were formulated (80% wheat, 20% basal diet) to supply nutrients necessary to meet the requirements of broiler chicks, except for a low level of nonphytate phosphorus (P, 2.7 g kg-1). The medium ground HRS-based diet produced significantly better feed conversion ratio (FCR) and body weights compared with the other two grind sizes. Heat treatment significantly improved feed conversion ratio and apparent metabolizable energy (AME), protein, and P digestibility of diets. It also significantly decreased feed intake, but produced no differences in 21 d body weight. Supplementation with phytase significantly improved AME, protein, and P digestibility of test diets. The AME of diets was influenced by wheat type, processing and grind size. Phytase increased N and P digestibility. Improvements in N and P digestibility by phytase and heat treatment were dependent on wheat type and grind size.The present results suggest an advantage of both phytase and xylanase in durum- and HRS-based diets. Heat processing destroyed endogenous phytase and xylanase in wheat-based diets, and increased the levels of soluble non-starch polysaccharides. Combined phytase, heat treatment, and grind size may synergistically improve N and P digestibility. Key words: Wheat source, grind size, heat treatment, phytase, digestibility, broiler

scholarly journals Economic Use of Brewer’s Dried Grain (BDG) in the Diet of Swine

1970 ◽  
Vol 10 ◽  
pp. 29-35 ◽  
Author(s):  
T. B. Rijal ◽  
D. B. Nepali ◽  
R. A. Sah ◽  
M. P. Sharma
Keyword(s):  
Body Weight ◽  
Body Weight Gain ◽  
Block Design ◽  
Early Period ◽  
Live Weight ◽  
Conversion Ratio ◽  
Feed Conversion Ratio ◽  
Feed Consumption ◽  
Substitution Effects ◽  
Feed Conversion

An experiment was conducted from 18th October, 2006 to 18th January, 2007 at IAAS Livestock Farm, Rampur, Chitwan to determine the substitution effects of soybean meal with brewer's dried grain (BDG) on the performance, economics and meat traits of swine production. Starter, grower and finisher diets were formulated containing 18, 16, and 14% CP respectively with 3000 Kcal/kg ME and adequately supplemented with required vitamins, minerals and amino acids. The treatments were: diet without brewer's dried grain -T1 (control diet), diet substituted with 10% brewer's dried grain-T2, diet substituted with 20% brewer's dried grain-T3, diet substituted with 30% brewer's dried grain-T4 and diet substituted with 35% brewer's dried grain-T5. Twenty weaned piglets having 7.37 to 7.94 kg live weight were housed in individual pens. Five piglets were randomly assigned to the five treatments following a randomized complete block design (RCBD) considering each individual as a replication. Fortnightly live weight, daily feed consumption, income over feed and pig cost, and different meat traits of pigs were recorded. The effect of replacing formulated diets with various level of brewer's dried grains on body weight gain was significant (p<0.01) with higher level of substitution resulting lower live-weight at the end of each of starter, grower and finisher diet period. The average body weight of piglets substituted with 35%BDG (27.00kg) and 30%BDG (39.75kg) were significantly lower (p<0.01) compared to the weight of piglets receiving 0% (65.75kg), 10% (64.25kg) and 20% (60.25kg) BDG replaced diets at the end of 3 months experimental period. A significant reduction (P<0.01) in average daily feed consumption were also recorded with increasing level of BDG in the diet. Better feed conversion ratio (FCR) was observed in T2 at early period which at finisher stage T3 diet resulted significantly better FCR which was at par with T1 and T2 diet fed group. However, T5 diet resulted the poorest feed conversion ratio of 5.26, 4.92 and 5.87 for starter, grower and finisher respectively. There was reduction in feed cost with different levels of BDG substitution in diet of pig. Highest income (in per cent) over expenditure (109.01%) was found in T2 followed by T1, T3, and T4. Lowest income over expenditure (-8.2%) was found in T5. Highest dressing percent (71.87%) was recorded in T1 and lowest (70%) in T5 diet fed group. Inclusion of 10-20% BDG seems most acceptable level of substitution of SBM. However, this result needs to be verified under farmer's management condition before recommendation.Key words: Brewer's dried grains; Swine performanceDOI: 10.3126/njst.v10i0.2820 Nepal Journal of Science and Technology Volume 10, 2009 December Page: 29-35  

scholarly journals PENGARUH PENGGUNAAN MOLASES SEBAGAI SUMBER ENERGI PAKAN PENGUAT DALAM RANSUM TERHADAP PERTUMBUHAN TERNAK KELINCI

ZOOTEC ◽  
2016 ◽  
Vol 37 (1) ◽  
pp. 149
Author(s):  
Sumarni Wuysang ◽  
C. A. Rahasia ◽  
J. F. Umboh ◽  
Y. L. R. Tulung
Keyword(s):  
Energy Source ◽  
Water Consumption ◽  
Animal Husbandry ◽  
Basal Diet ◽  
Conversion Ratio ◽  
Feed Conversion Ratio ◽  
Feed Consumption ◽  
Feed Conversion ◽  
Negative Effects ◽  
Daily Gain

UTILIZATION EFFECT OF MOLASSES AS ENERGY SOURCE IN THE DIETS ON GROWING RABBIT PERFORMANCE. Molasses had been used previously in animal feeds. The present study was conducted to determine the effect of molasses utilization in the diets on growing rabbits. The study was conducted during five weeks at Department of Animal and Feed Science Laboratory, Faculty of Animal Husbandry, University of Sam Ratulangi, Manado. Twenty eight-weeks weaned female rabbits with an initial body weight of 600 -700 gr were used in this trial. Animals were allocated in an individual cage. A Completely Randomized Design (CRD) with 4 treatments and 5 replications was used for analysis of variance. Treatments were formulated as follow: R0 = 100% basal diet + 0% molasses; R1 = 98% basal diet + 2% molasses; R2 = 96% basal diet + 4% molasses; and R3 = 94% basal diet + 6% molasses. Variables measured were daily feed consumption, water consumption, daily gain, and feed conversion. Research results showed that average daily feed consumption in the present study ranged from 58.1 to 60.4 g; daily water consumption from 127.2 to 163.8 liters; daily gain from 20.1 to 20.9 g; and feed conversion ratio of about 3.57 to 3.80. Statistical analysis revealed that utilization of molasses replacing part of basal diets up to 6% gave no significant differences on daily feed consumption, water consumption, daily gain, and feed conversion ratio.  It can be concluded that molasses as an energy source can be utilized up to 6% in growing rabbit diets without any negative effects. Keywords: Molasses, diets, growing rabbits performance

scholarly journals Growth performance, carcass indices and blood profile of broiler chickens fed tiger nut residue

2021 ◽  
Vol 6 (2) ◽  
pp. 50-57
Author(s):  
C. A. Essien ◽  
Keyword(s):  
Weight Gain ◽  
Live Weight ◽  
Conversion Ratio ◽  
Feed Conversion Ratio ◽  
Average Weight ◽  
Broiler Chicks ◽  
Feed Conversion ◽  
Blood Profile ◽  
Final Weight ◽  
Average Weight Gain

A total of two-hundred-and-forty day old broiler chicks were used to study the response of broiler birds to diets containing graded levels of tiger nut residue (TNR) as a replacement for maize. The diets consisted of 0, 10, 20 and 30% of TNR as a replacement for maize as T1 (control), T2, T3 and T4 respectively. The birds were allotted to four dietary treatments of 4 replicates each containing 60 and 15 birds respectively in a completely randomized design. The data obtained from the experiment were subjected to one - way analysis of variance. The results showed that average weight gain (AWG) and final weight gain (FWG) were high for birds fed 10% TNR and increased numerically than the 0, 20 and 30% groups at the starter phase. In the finisher phase the average weight gain (AWG) and final weight gain (FWG) followed the same trend. Feed intake was not significantly affected by the diet at the starter and finisher phases. In the starter phase the T1 (control) recorded the best and the lowest feed conversion ratio but in the finisher phase, the best feed conversion ratio was observed in T2. The TNR inclusion had no significant (p˃0.05) effect on live weight, dressed weight, dressing percentage, cut-parts and organs of the birds. The haematological parameters were not significantly (p˃0.05) affected by the diets. All the biochemical parameters determined; serum protein, albumin, globulin, urea, creatinine, ALT, AST, cholesterol and triglyceride were not significantly (p˃0.05) affected by the treatment diet. It was concluded that tiger nut residue (TNR) as a replacement for maize at a 30% level of inclusion did not cause any deleterious effects on the performance, carcass and blood profiles of broilers

scholarly journals Penampilan Ayam Pedaging yang Mengkonsumsi Pakan Mengandung Tepung Kulit Nanas Disuplementasi dengan Yoghurt

2013 ◽  
Vol 13 (2) ◽  
pp. 15-20 ◽  
Author(s):  
Nurhayati Nurhayati
Keyword(s):  
Body Weight ◽  
Weight Gain ◽  
Broiler Chicken ◽  
Body Weight Gain ◽  
Conversion Ratio ◽  
Feed Conversion Ratio ◽  
Feed Consumption ◽  
Feed Conversion ◽  
Treatment Groups ◽  
Pineapple Peel

Broiler chicken performance feed ration containing pineapple peel meal and supplemented by yoghurtABSTRACT. An experiment was conducted to determine the broiler performance feed ration contained pineapple peel meal supplemented by yoghurt. A hundred broiler chickens 2 days old were used in this study those divided into 4 treatment groups and kept for 4 weeks. The treatments were level of pineapple peel meal (PPM) into the ration; P0 = ration without PPM, P1 = ration contained 5 % of PPM, P2 = ration contained 10 % of PPM and P3 = ration contained 15 % of PPM. To neutralize high crude fiber content in the ration, chickens were supplemented by yoghurt consisted 3,3 x 108 CFU/ml of Lactobacillus bulgaricus and Streptococcus thermophilus as much as 3 ml/kg body weight. Yoghurt was offered in the morning before feeding. Each treatment was replicated 5 times. The experiment was assigned into Completely Randomized Design with 4 treatments and 5 replications. Parameters were feed consumption, water consumption, body weight gain and feed conversion ratio. Data were analyzed by Analysis of variance (ANOVA) and significantly effect was tested by Duncan’s Multiple Range Test. Results of this study showed that there was no significant difference (P0.05) among 0, 5, and 10 % the treatment groups on feed consumption, water consumption, body weight gain and feed conversion ratio. Offered 15 % of pineapple peel to the chickens did not significantly (P0.05) increased feed consumption and conversion ratio but did not significantly (P0.05) decreased body weight gain.  It is concluded that pineapple peel meal might be mixed into the broiler chicken ration up to 10 % without any significant adverse effect  on performance when they were supplemented by yoghurt as much as 3 ml/kg of body weight.

scholarly journals PENGARUH PENGGANTIAN SEBAGIAN JAGUNG DENGAN TEPUNG KULIT PISANG RAJA (Musa paradisiaca) DALAM RANSUM TERHADAP PERFORMAN BROILER

ZOOTEC ◽  
2015 ◽  
Vol 35 (2) ◽  
pp. 158
Author(s):  
David Djapili ◽  
Fenny Wolayan ◽  
Ivonne Untu ◽  
Hengki Liwe
Keyword(s):  
Conversion Ratio ◽  
Feed Conversion Ratio ◽  
Feed Consumption ◽  
Broiler Chicks ◽  
Feed Conversion ◽  
Musa Paradisiaca ◽  
Yellow Corn ◽  
Randomized Design ◽  
Significant Difference ◽  
Daily Gain

ABSTRACT EFFECT OF SUBSTITUTION OF YELLOW CORN WITH BANANA (Musa paradisiaca) PEELS IN THE DIETS ON BROILER PEERFORMANCE. A study has been conducted to determine the effect of substitution of yellow corn with banana (Musa paradisiaca) peels in the diets on broiler performance. The present study used 60 broiler chicks and reared for 5 weeks. A Completely Randomized Design was used as an experimental design with 4 treatments and 5 replications. Treatments were formulated as follow: R0: diet without substitution of banana peels or 0% in the diet; R1: diet with the substitution of 7,5% or 4,28% in the diet; R2: diet with the substitution of 15,0% or 8,55% in the diet; and R3: diet with the substitution of 22,5% or 12,83% in the diet. Variables measured were: daily feed consumption, daily gain, and feed conversion. Research results showed that daily feed consumption, daily gain, and feed conversionratio were all significantly (P < 0,05) affected by treatments. Daily feed consumption at R3 significantly (P < 0,05) lower compared with R0 and R1 treatments, but no differences (P > 0,05) were observed  between R2 and R3. No significant (P > 0,05) was observed between R0 and R1, but there was a significant difference (P < 0,05) between R2 and R3 and between R1 and R2. Feed conversion ratio was significantly (P < 0,05) lower for R0 compared with R1, R2 and R3, but no differences (P > 0,05) were observed among R0, R1, and R2 treatments. It can be concluded that banana (Musaparadisiaca) peels meal can be used up to 15% replacing yellow corn or 8,55% in broiler diet. Key words: Broiler chicks, Banana    (Musaparadisiaca) peels,        Daily feed consumption,         Daily gain, feed conversion            ratio.

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