scholarly journals Performance, carcass traits, and relative organ weight of broiler supplemented by guanidinoacetic acid: A meta-analysis

2022 ◽  
Vol 951 (1) ◽  
pp. 012030
Author(s):  
Y Hardiyanto ◽  
A Jayanegara ◽  
R Mutia ◽  
S Nofyangtri
Keyword(s):  
Fixed Effects ◽  
Mixed Model ◽  
Meta Analysis ◽  
Average Daily Gain ◽  
Carcass Traits ◽  
Liver Weight ◽  
Feed Conversion ◽  
Guanidinoacetic Acid ◽  
Adenosyl Methionine ◽  
Daily Gain

Abstract Guanidinoacetic acid (GAA) is formed by the arginine and glycine that are catalysed by arginine:glycine amidinotransferase in the kidney. In the liver, GAA is methylated by s-adenosyl methionine and converted to creatine, then deposited into muscle as energy supply. This meta-analysis was done by integrating 20 articles from various journals. Supplementation doses ranged from 0 to 8000 ppm/kg feed. The mixed model methodology was employed with GAA level and broiler strain as fixed effects and studies as random effects. The results showed that increasing GAA level improved average daily gain day 0-21 and reduced feed conversion ratio day 0-35 (P<0.05). A higher GAA also accompanied by decreasing relative liver weight (P<0.05). GAA supplementation did not affect average daily feed intake and percentage of carcass traits (carcass, legs, breast, wings, drum, thigh) and other parameters such as abdominal fat, gizzard, heart, bursa, thymus and spleen (P>0.05). It was concluded that supplementation of GAA improved the performance of broilers.

scholarly journals Propolis supplementation affects performance, intestinal morphology, and bacterial population of broiler chickens

2021 ◽  
Vol 51 (4) ◽  
pp. 477-487
Author(s):  
S. Sadarman ◽  
E. Erwan ◽  
A. Irawan ◽  
M.M. Sholikin ◽  
R. Solfaine ◽  
...  
Keyword(s):  
Broiler Chickens ◽  
Bacterial Population ◽  
Mixed Model ◽  
Meta Analysis ◽  
Digestive Enzyme ◽  
Average Daily Gain ◽  
Intestinal Morphology ◽  
Detectable Effect ◽  
Optimum Level ◽  
Feed Conversion

A meta-analysis was conducted to examine the effect of supplementing the diet of broiler chickens with propolis on growth, bacterial population of the intestine, antiviral serum concentration, intestinal morphology, and digestive enzyme activities in broiler chickens. Forty peer-reviewed articles that had been published between 2003 and 2019 were identified using the PRISMA protocol and included in the study. Data were analysed with mixed model methodology, in which the studies were considered random effects, whereas the level of supplemental propolis was considered a fixed effect. Responses to propolis supplementation in bodyweight (BW) and average daily gain (ADG) were quadratic, but average daily feed intake (ADFI) was not affected. Propolis supplementation improved feed conversion ratio (FCR) significantly as a linear function of the level of supplement. The optimum level of supplementation was between 256 and 262 mg/kg feed and produced maximum ADG and final BW. There was a tendency for mortality to decrease because of propolis supplementation. Propolis had no detectable effect on serum antiviral concentration, intestinal bacterial population or intestinal morphology. Among digestive enzymes, only sucrase increased linearly as propolis was increased. Thus, supplementation with propolis increased the growth performance of broiler chickens positively and the effect was dose dependent. This may have been partly because of an improvement in sucrase activity and other factors related to the nutritional content of propolis. Future study to evaluate specific bioactive compounds of propolis is therefore warranted.

scholarly journals Effect of dietary inclusion of black soldier fly larvae (Hermetia illucens) on broiler performance: A meta-analysis

2022 ◽  
Vol 335 ◽  
pp. 00013
Author(s):  
Sandi Nayohan ◽  
Irwan Susanto ◽  
Dessy Permata ◽  
Raiza Tri Pangesti ◽  
Mardiah Rahmadani ◽  
...  
Keyword(s):  
Fixed Effects ◽  
Mixed Model ◽  
Meta Analysis ◽  
Average Daily Gain ◽  
Live Weight ◽  
Blood Metabolites ◽  
P Value ◽  
Black Soldier Fly ◽  
Hermetia Illucens ◽  
Broiler Performance

Black Soldier Fly (BSF, Hermetia illucens) is an insect species that potentially can be used as a protein source for broiler nutrition. This study aimed to evaluate different inclusion level of BSF on broiler performance and blood metabolites by integrating various data from related studies using meta-analysis. Total of 12 studies that comprised of 31 data points were integrated in the database. Parameters observed included Live Weight (LW), Average Daily Gain (ADG), Daily Feed Intake (DFI), Feed Conversion Ratio (FCR), blood metabolites, and carcass proportion. The database was statistically analyzed by using mixed model method. Different studies were considered as random effects, and the level of BSF was treated as fixed effects. The model statistics used were the p-values and the Akaike information criterion. The significance of an effect was stated when its p-value was < 0.05. The results revealed that BSF feeding had significant linearly reduction effect on LW, ADG, and FCR of broiler (P < 0.05) and significant linearly increase effect on DFI and carcass proportion. However, BSF did not significantly affect on blood metabolites of broilers. It can be concluded that BSF negatively affect the performance of broiler.

scholarly journals The Effect of Live Yeast Supplementation on Beef Cattle Performance: A Systematic Review and Meta-Analysis

2017 ◽  
Vol 9 (4) ◽  
pp. 21 ◽  
Author(s):  
Everton Dezordi Sartori ◽  
Maria Eugênia Andrighetto Canozzi ◽  
Daniele Zago ◽  
Ênio Rosa Prates ◽  
João Pedro Velho ◽  
...  
Keyword(s):  
Beef Cattle ◽  
Dry Matter ◽  
Randomized Trials ◽  
Meta Analysis ◽  
Average Daily Gain ◽  
Dry Matter Intake ◽  
Inclusion Criteria ◽  
Feed Conversion ◽  
The Mean ◽  
Daily Gain

This meta-analysis evaluates the effects of yeast supplementation (Saccharomyces cerevisiae) on dry matter intake (DMI) and average daily gain (ADG) in beef cattle. The inclusion criteria were complete and randomized trials and supplementation with yeast S. cerevisiae versus no supplementation to measure DMI or ADG. Data were extracted from relevant papers via pre-defined protocols. A meta-analysis of random effects was conducted for each indicator separately including the mean of the control and treated groups. The results were presented with the pooled mean difference (MD), 95% of confidence interval, and I² (percentage of total variation between studies that is due to heterogeneity rather than chance). A total of 12 publications reporting 22 trials conducted in 1,161 cattle were analysed. The heterogeneity between studies was high and ranged from 92 to 99%. No effects were observed in ADG with the inclusion of yeast in the diet (MD = -2.849 g/day, p = 0.492). However, there was a reduction in the DMI (MD = -0.885 kg/day; p = 0.023) despite the high heterogeneity among studies (I2 = 92.4%; p < 0.001). The ADG increased when the forage level in the diet was between 30 and 50% (MD = 641.08 g/day; p = 0.001) and decreased when the level range from 51 to 75% (MD = -2.90 g/day; p < 0.001). In over 60% of the Neutral Detergent Fibre, the use of yeast in the diet decreased the ADG by 406.94 g/day (p = 0.034). Feedlot animals showed a reduction in the DMI (MD = -0.97 kg/day; p = 0.019) if supplemented with yeast. Supplementation with S. cerevisiae in the diet of beef cattle had no effect on ADG; however, it does improve the feed conversion due to the reduction in DMI.

scholarly journals PSVIII-4 Live growth performance of Jersey steers using an aggressive implant strategy

2019 ◽  
Vol 97 (Supplement_3) ◽  
pp. 304-304
Author(s):  
Tylo J Kirkpatrick ◽  
Sierra L Pillmore ◽  
Kimberly Cooper ◽  
Travis Tennant ◽  
Ty Lawrence
Keyword(s):  
Growth Performance ◽  
Repeated Measures ◽  
Fixed Effects ◽  
Dry Matter ◽  
Mixed Model ◽  
Average Daily Gain ◽  
Dry Matter Intake ◽  
Repeated Measure ◽  
Feed Ratio ◽  
Daily Gain

Abstract This experiment was designed to study the effect of days on feed and an aggressive implant strategy on Jersey steer growth performance. Steers (n = 30; start of trial body weight (BW) 183 ± 43 kg) were randomly assigned to one of two treatments; negative control (CON) or implanted with Revalor 200 every 70 d (REV; d 0, d 70, d 140, d 210, d 280, d 350) for a total of 6 implants. Steers were weighed every 35 d and daily feed delivery was recorded daily. Data for dry matter intake (DMI) and gain to feed ratio (G:F) were analyzed via a mixed model; the fixed effects were day and treatment. Live growth BW and average daily gain (ADG) used day as the repeated measure and animal as the subject in a repeated measures analysis. Change in BW increased linearly (P &lt; 0.01); treatments differed in BW from d 280 through d 350 (P &lt; 0.01). Average daily gain decreased (P &lt; 0.01) linearly and differed (P &lt; 0.01) at d 70, d 140, d 280, and d 350, but not (P ≥ 0.10) at d 210 or d 420. Dry matter intake was greater (P &lt; 0.05) for REV steers (7.6 kg/d) than CON (6.8 kg/d). Gain to feed ratio did not differ (P ≥ 0.78) between CON steers (0.13 kg/kg dry matter (DM)) and REV (0.14 kg/kg DM) steers, yet G:F differed (P &lt; 0.01) amongst periods (d 70 = 0.21 kg/kg, d 140 = 0.16 kg/kg, d 210 = 0.15 kg/kg, d 280 = 0.13 kg/kg, d 350 = 0.08 kg/kg, d 420 = 0.08 kg/kg). Aggressively implanting Jersey steers improved growth performance by 9.6%, 13.2%, 11.3%, and 7.7% for BW, ADG, DMI, and G:F, respectively.

scholarly journals PSI-25 The effect of growth rate on the uterine environment in beef heifers

2020 ◽  
Vol 98 (Supplement_4) ◽  
pp. 271-271
Author(s):  
Elizabeth M Chaney ◽  
Taylor D Harrison ◽  
Kiernan J Brandt ◽  
Liesel G Schneider ◽  
Rebecca R Payton ◽  
...  
Keyword(s):  
Growth Rate ◽  
Fixed Effects ◽  
Mixed Model ◽  
Average Daily Gain ◽  
Reproductive Function ◽  
Mixed Model Anova ◽  
Before And After ◽  
Uterine Environment ◽  
Distillers Grain ◽  
Daily Gain

Abstract Replacement heifers provide the foundation of breeding herds by incorporating new and improving genetics. Growth rate (GR) manipulation during heifer development may alter the uterine environment via immune response impacting reproductive function. Angus-crossbred heifers (n = 48) were blocked into 4 weight classes and randomly assigned to one of three treatments: 1) control (CON) fed to gain 0.68 kg/day for 120 d, 2) fast to slow (F/S) fed to achieve 1.25 kg/day for 57 d, then 0.11 kg/day for 63 d, and 3) slow to fast (S/F) fed to achieve 0.11 kg/day for 57 d, then 1.25 kg/day for 63 d. Heifers were supplemented (75% dry distillers grain and 25% corn) four times weekly to achieve desired GR and offered ad libitum forage and water. Blood, BW and BCS were taken every two wks beginning at the start of treatment (d 0) and supplements were adjusted following BW measurement. Uterine and vaginal flushes were taken at d 0, 57, and 120 to determine cytokine and hormone presence. Mixed model ANOVA utilized fixed effects of treatment, day, and their interaction to analyze influence of GR on BW, BCS, average daily gain (ADG), and feed:gain (F:G). All BW were similar until the GR switch; CON and S/F decreased for 3 samples and then returned to similarity (P=0.06). ADG was lower in CON and S/F immediately following GR switch; however, all treatments were similar before and after this event (P=0.0054). All maintained similar F:G until F/S decreased after GR switch (P=0.01). Total F:G was similar for all treatments (CON=18.3, F/S=26.5, S/F=22.7; P=0.25) In conclusion, altering GR during development will allow producers to hit growth thresholds but may impact the uterine environment. We plan to further elucidate the immune profile via cytokine and hormone concentrations from uterine and vaginal flushes.

scholarly journals Performance, carcass traits and non-carcass components of lambs fed different levels of crambe meal

2021 ◽  
Vol 42 (6supl2) ◽  
pp. 4073-4084
Author(s):  
Vivian Maria Deval ◽  
◽  
Angela Rocio Poveda-Parra ◽  
Erica Regina Rodrigues ◽  
Gianne Evans Cunha Falocci ◽  
...  
Keyword(s):  
Soybean Meal ◽  
Dry Matter ◽  
Average Daily Gain ◽  
Carcass Traits ◽  
Heart Weight ◽  
Feed Conversion ◽  
Crambe Meal ◽  
Meal Protein ◽  
Daily Gain ◽  
Different Levels

The goal of this study was to evaluate different levels of crambe meal (0, 330, 670 and 1,000 g kg-1 dry matter [DM]) as a replacement for soybean meal in diets supplied to feedlot lambs, and their effects on performance, carcass traits and non-carcass components. Twenty-four castrated lambs weighing 18.2 kg at the beginning of the experiment were allocated in a completely randomized design. Diets were formulated to meet the requirements of the lamb for an average daily gain of 0.200 kg. The roughage:concentrate ratio was 60:40, using Brachiaria dyctioneura hay as roughage. Dry matter intake, feed conversion, average daily gain, carcass traits and non-carcass components were evaluated. There was no effect of different levels of crambe meal replacing soybean meal on performance, carcass traits and non-carcass components, except heart weight. Replacement 1,000 g kg-1 DM of soybean meal protein by crambe meal protein does not affect the performance, carcass traits, or non-carcass components.

scholarly journals Performance, carcass characteristics, and centesimal composition of meat from Santa Inês lambs and Texel crossbred lambs (Santa Inês × Texel)

2019 ◽  
Vol 99 (2) ◽  
pp. 228-236
Author(s):  
Iolanda Aparecida Nunes ◽  
Ricardo Alessandro Martins Brito ◽  
Letícia Aparecida de Morais ◽  
Vanessa Souza Silva ◽  
Marco Antônio Pereira da Silva ◽  
...  
Keyword(s):  
Weight Gain ◽  
Average Daily Gain ◽  
Carcass Traits ◽  
Great Influence ◽  
Carcass Characteristics ◽  
Live Weight ◽  
Feed Conversion ◽  
Significant Difference ◽  
Santa Inês ◽  
Daily Gain

This study evaluated the performance, carcass characteristics, and centesimal composition of the meat of intact and castrated lambs of the Santa Inês breed and of the crossbred animals: one-half Santa Inês × one-half Texel. Thirty-four lambs were used, nine intact and nine castrated males of the Santa Inês breed, and seven intact and nine castrated crossbred males, all aged between 6 and 7 mo and with an average live weight of 18.2 kg. The design was completely randomized in a 2 × 2 factorial (two crossing and two sexual conditions), with statistical analyses performed in the STAT version 9.4 program. There was a significant difference the Santa Inês and the Texel and Santa Inês crossbred animals in feed conversion and average daily gain, with superiority of the latter group. Castration of animals aged <12 mo had no significant effect on the performance and on the carcass traits of the Texel and Santa Inês crossbred animals, whereas the genotype had a great influence on weight gain and on subjective and quantitative carcass characteristics, demonstrating that crosses in sheep are needed to explore the complementarity of breeds, and heterosis is needed to achieve better performances and carcass characteristics.

PRETEST HERD EFFECTS ON STATION PERFORMANCE TEST

1986 ◽  
Vol 66 (4) ◽  
pp. 925-935 ◽  
Author(s):  
A. K. W. TONG ◽  
J. A. NEWMAN ◽  
G. W. RAHNEFELD
Keyword(s):  
Fixed Effects ◽  
Mixed Model ◽  
Performance Test ◽  
Average Daily Gain ◽  
Research Station ◽  
Environmental Correlations ◽  
Warm Up ◽  
Covariance Components ◽  
Variance And Covariance Components ◽  
Daily Gain

Effects of herd of origin and the relationships between pretest and station test environments were examined from pre- and postweaning performance records of 1675 crossbred male and female calves of Hereford, Angus and Shorthorn dams, sired by 20 Charolais, 12 Simmental and 15 Limousin sires. The calves were born during 1969–1972 and raised to weaning in 45 herds from Manitoba, Saskatchewan and Alberta, and were then transported to the Brandon or the Lacombe Research Station for a 140-d postweaning performance test. Fixed effects and variance and covariance components were estimated from a mixed model which included fixed effects of herd-year, sex of calf and breed of sire and random sire effects. Herd-year effects were significant (P < 0.01) for all performance traits studied. Herd-year mean squares expressed as a percentage of the corrected total sum of squares accounted for 25.81% in the pretest period to a maximum of 54.26% in the warm-up period and then decreased to 6.78% in the 140-d period. Herd-year differences were relatively small in the later part of the test. Correlations of herd-year solutions ranged from −0.10 to 0.05 and of environments ranged from −0.09 to 0.02 between pretest average daily gain (ADG) and ADG at various test intervals. The low environmental correlations suggest that the performance of calves centrally tested at the Brandon and Lacombe Research Stations were not affected by the pre-test herd environment. Key words: Beef cattle, station test, pretest herd effects, environmental correlation

scholarly journals 206 Meta-analysis of the response of piglets to dietary valine: impact of other branched chain amino acids

2020 ◽  
Vol 98 (Supplement_3) ◽  
pp. 18-18
Author(s):  
Maroua Zouaoui ◽  
Aude Simongiovanni ◽  
Marie-Pierre Létourneau-Montminy
Keyword(s):  
Amino Acids ◽  
Metabolic Pathways ◽  
Meta Analysis ◽  
Average Daily Gain ◽  
Random Effect ◽  
Branched Chain Amino Acids ◽  
Feed Conversion ◽  
Multiple Regression Models ◽  
Branched Chain ◽  
Daily Gain

Abstract Branched chain amino acids (BCAA), valine (Val), isoleucine (Ile) and leucine (Leu) share the same metabolic pathways. An excess of Leu stimulates the catabolism of Val and Ile that may lead to a decrease in piglet growth performance. The objective of this study is to quantify the response of piglets to dietary Val and the influence of Leu and Ile on this response through a meta-analysis approach. A total of 16 articles published between 2001 and 2018, including 23 experiments and 126 treatments were used. Multiple regression models were fitted with the MIXED procedure of Minitab software with the random effect of the experiment. The Y variables were Average Daily Gain (ADG), Average Daily Feed Intake (ADFI) and Feed Conversion Ratio (FCR). The main X variable was the Standardized Ileal Digestible Val (ValSID) and the other ones were Leu (LeuSID) and Ile (IleSID). The response of ADG, ADFI and FCR to ValSID was curvilinear (P&lt; 0.001: ADG, R2 = 0.93%; ADFI, R2= 0.97%; FCR, R2=0.93%). Results showed that increasing dietary LeuSID reduced ADG and ADFI (P&lt; 0.05) but also that the response of piglets to ValSID was stronger in high LeuSID diet (P &lt; 0.05; Interaction ValSIDxLeuSID; ADG and ADFI). Based on these models, increasing dietary ValSID from 7 to 8.5g/kg generates in wheat-based diets (10 g /kg of LeuSID) an improvement of ADG of 4.7% and ADFI of 2.5% compared to 7.4% for ADG and 5.2% for ADFI in corn-based diets (14 g/ kg of LeuSID). The response of ADG, ADFI and FCR to ValSID was not modified by IleSID. This study showed that ADG, ADFI and FCR are improved with increasing dietary Val and this effect was modulated by dietary Leu content except for FCR. Results can help piglet nutritionists to optimize dietary Val levels based on other BCAA content.

272 Managing for Efficiency and Quality Through Diet and Implant Strategies on Steers Selected for Superior Marbling

2021 ◽  
Vol 99 (Supplement_1) ◽  
pp. 131-132
Author(s):  
Erika L Lundy ◽  
Aubree M Beenken ◽  
Patrick B Wall ◽  
Daniel D Loy
Keyword(s):  
Fixed Effects ◽  
Average Daily Gain ◽  
High Energy ◽  
Beef Steers ◽  
Feed Conversion ◽  
Marbling Score ◽  
Feedlot Performance ◽  
Ribeye Area ◽  
Dietary Treatments ◽  
Daily Gain

Abstract A 144-day study assessed the effects of dietary energy and implant potency to determine optimum strategies for managing feed conversion (F:G) and marbling. Fifty-four Angus steers (327 ± 8 kg) from Iowa State University’s herd genetically selected for enhanced marbling were stratified by initial bodyweight (BW), ultrasound intramuscular fat, and age to a 2 × 3 factorial. Dietary treatments included: low energy (1.30 Mcal NEg/kg DM, 18% roughage level; LE) or high energy finishing ration (1.39 Mcal NEg/kg DM, 8% roughage; HE). Implant treatments (IMP; Merck) included: no implant (NOIMP), Revalor-IS (RIS), or Revalor-200 (R200) on d 0 and 74. Steers were fed via bunks capturing daily individual feed disappearance (n = 9 steers/treatment). Steers were weighed on d 0, 74, and 144 and harvested on d 145. Data were analyzed in Proc Mixed of SAS with fixed effects of diet, IMP, and interaction. No interactions were observed for feedlot performance (P &gt; 0.17). Steers fed HE had greater average daily gain (ADG) and final BW than LE steers (P &lt; 0.01) while LE steers had greater F:G (P = 0.04). Final BW and ADG were greatest for R200, intermediate for RIS, and lowest for NOIMP (P &lt; 0.01). F:G was greatest for NOIMP, intermediate for RIS, and lowest for R200 (P &lt; 0.01). Steers fed HE had increased ribeye area (P &lt; 0.01) and tended to have greater marbling score (P = 0.06; 809) than LE steers (769). While ribeye area increased in response to implant potency (P &lt; 0.01), marbling score was not impacted (P = 0.21) by IMP (815, 771, 782, for NOIMP, RIS, R200, respectively). Overall, steers graded 100% Choice or higher and 55% Prime. These data suggest implants, when used appropriately, improve growth performance and efficiency in beef steers without compromising carcass quality.

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