Organic selenium and vitamin E for gilts and sows bred in equatorial climate.

The aim of this study was to evaluate the dietary supplementation of organic selenium (Se) and vitamin E for sows from 1st and 2nd parity order, without adiabatic cooling on physiological parameters, reproductive performance, milk composition, litter performance and blood concentrations of antioxidant enzymes. A total of 96 sows were allotted in a 4 × 2 completely factorial design, with 4 experimental groups and 2 parity orders (1st and 2nd). The experimental groups consisted of: ACCon-sows receiving adiabatic cooling and no dietary supplementation of organic Se and vitamin E; WACCon-sows without adiabatic cooling and no dietary supplementation of organic Se and vitamin E; WACSe-sows without adiabatic cooling with dietary supplementation of 0.3 mg/kg organic Se; WACSeE-sows without adiabatic cooling with dietary supplementation of 0.3 mg/kg organic Se and 90 UI of vitamin E. ACCon Sows had lower respiratory rate, rectal temperature and body surface temperature when compared to the others sows (p < 0.05). Sows without evaporative cooling had lower daily milk production and weaned litters with lower weight and average daily gain when compared to the other groups (p < 0.05). ACCon sows presented higher weaned piglets to WACSeE sows. WACSeE Sows had higher concentrations of GSH-Px when compared to other experimental groups and higher levels of SOD than sows from ACCon and WACSe. Piglets of sows from WACSeE group presented higher levels of GSH-Px and SOD when compared to the other experimental groups. ACCon sows have higher milk yield and higher litter weight than others groups. Under equatorial climate conditions, dietary supplementation of organic Se and vitamin E from first and second parity order sows does not respond efficiently on thermoregulatory physiology and performance compared to adiabatic cooling, but modulates the enzymatic antioxidant balance of sows and piglets.

Alternative additives associated in the feeding of laying hens: performance, biometrics, bone traits, and economic evaluation-an unsupervised machine learning approach.

Given the current bans on the use of some growth promoting antibiotics in poultry nutrition, the need to use alternative additives which could replace traditional promoters in diets has arisen. The objective of this study was to evaluate the effect of alternative additives, associated or not, in replacing the antibiotic growth promoter in the diets of laying hens on performance, egg quality, biometry, bone characteristics, and economic viability. A total of 378 birds at 97 weeks of age, weighing 1691 ± 80g with an average production of 79.96 ± 4.9%, were randomly distributed and submitted to different diets: negative control - NC (no additive); positive control - PC, conventional growth promoter (Enramycin); associated organic acids (OA); symbiotic (S); Essential oil (EO); OA + S; and S+EO. The diet did not influence (P > 0.05) performance, egg quality, biometry, and bone traits. However, the use of alternative additives and their associations with the exception of S+OA, provided better economic indices when compared to NC and CP. The first component showed a negative relationship between feed conversion per mass and dozen eggs with gut length, Seedor index, egg production, and egg mass; the second component showed a positive relationship between yolk, pancreas, proventriculus, and gizzard; and, finally, the third component showed that feed consumption has a negative relationship with bone strength and deformity. The first two canonical functions were significant and discriminated 100% of the differences between the diets. Moreover, 50% of the birds were correctly classified in their group of origin, in which the positive control group (83.3%) and OA+S presented the highest rates of correct responses (66.7%). Bone deformity and bowel length were the only two variables with discriminatory power. Natural growth promoters alone or in association do not harm performance, egg quality, digestive organs biometry or bird bone characteristics, in addition to promoting greater economic return. Thus, they can be considered possible substitutes for traditional antibiotics. Finally, unsupervised machine learning methods are useful statistical techniques to study the relationship of variables and point out the main biomarkers of poultry production.

Effects of mango peel ethanolic extract as antioxidant in quail diets on performance, carcass traits, and meat lipid stability.

The purpose of this study was to evaluate the inclusion of mango peel ethanolic extract (MPEE) as antioxidant in quail diets containing two lipid sources, on performance, carcass characteristics, and lipid stability of in natura and frozen meat. A total of 432 meat quails were used, males and females, from 7 to 42 days of age, distributed in a completely randomized design in a 3 × 2 factorial arrangement, with 3 levels of MPEE (0, 500, and 1000 mg/kg) and 2 lipid sources (soybean and sunflower oil), totaling 6 treatments with 6 replications of 12 birds. In order to evaluate the meat lipid stability, carcass samples were used in a 2 × 2 × 2 × 3 factorial arrangement, with 2 levels of MPEE (0 and 1000 mg/kg), 2 lipid sources (soybean and sunflower oil), 2 types of packaging (conventional and vacuum), and 3 storage times (0, 60, and 120 days), totaling 16 treatments with 6 replications. There was no effect of interaction (P > 0.05) between the factors on the performance variables and carcass characteristics. Oil types and MPEE levels did not influence (P > 0.05) performance. For carcass characteristics, it was found to be increased (P < 0.05) in breast meat yield due to the inclusion of MPEE. For the meat lipid stability, there was only an effect of interaction (P < 0.05) between type of packaging and storage time. The inclusion of 1000 mg/kg of MPEE provided greater meat lipid stability, enabling the use of common packaging for the storage of quail meat for up to 120 days.

Calcium anacardate and its association with citric acid in diets for meat-type breeding quails.

The purpose of this study was to evaluate the effects of using calcium anacardate (CaA) as a source of anacardic acid and its association with citric acid (CA) in diets for breeding quails on the performance, the egg quality, incubation parameters, and progeny performance. Were used 540 quails European quails (Coturnix coturnix coturnix) that were 21 weeks old, housed in laying cages based on a completely randomized design, with nine treatments and six replications of 10 quails per parcel, with each experimental unit having eight females and two males. The following additions to the diet were evaluated: 1, no addition (control diet); 2, 0.25% CaA; 3, 0.25% CaA and 0.25% CA; 4, 0.50% CaA; 5, 0.50% CaA and 0.25% CA; 6, 0.50% CaA and 0.50% CA; 7, 0.75% CaA; 8, 0.75% CaA and 0.25% CA; and 9, 0.75% CaA and 0.50% CA. The treatments had no significant effects on the performance of the breeding quails, incubation parameters, and progeny performance. For egg quality, there was only an effect on yolk lipid oxidation, which was lower for eggs from quails fed the diets containing 0.50% CaA and 0.25% CA, 0.50% CaA and 0.50% CA, or 0.75% CaA alone, when compared with the control group. Considering that including CaA with or without CA in diets for breeding quails only affected yolk lipid oxidation, it can be recommend including 0.50% CaA and 0.25% CA or 0.75% CaA alone to mitigate oxidative damage in the yolk of fertile eggs.

Cardanol in the feeding of meat-type quail breeders.

The purpose of this study was to evaluate the inclusion of cardanol in the diet of quails on productive performance, egg quality, reproductive performance, and progeny performance. A total of three hundred European quail breeders of 32 weeks of age, with average body weights of 305.98 g, were housed in laying cages in groups (4 females and 1 male), following a distribution in a completely randomized design with 5 treatments and 6 replications of 10 quails, being the experimental unit constituted by the set of two cages. The treatments consisted of diets with 0, 0.25, 0.50, 0.75, and 1.00% of cardanol. There was reduction in the performance of the quail with the inclusion of 1.00% of cardanol in the diet when compared to the control treatment, while egg weight and egg mass were lower in the treatments with 0.75 and 1.00% of cardanol, respectively. It was observed that there was decrease in the specific gravity, and increase in color and TBARS value of the yolk in all treatments with cardanol. The inclusion of 0.50% of cardanol decreased the percentage of albumen, and increased the percentage of yolk, while the shell thickness decreased with 0.75%. The weight of the incubated eggs and the chick weight at hatching were lower in the treatments with 0.75 and 1.00% of cardanol. In the evaluation of the progeny performance, it was found that the weight at 7 days of age of chicks from breeders fed the diet containing 1.00% of cardanol was decreased when compared to the chicks from breeders fed the control diet. It was concluded that the inclusion of cardanol did not present benefits to the quail breeders.

Passion fruit seed cake in the feeding of meat quails: effects on performance, carcass characteristics, lipid stability of the meat, litter quality, and economic viability.

The objective of this study was to determine the chemical composition and energy value of passion fruit seed cake (PFSC) and to evaluate the inclusion of different levels of PFSC in the diets for quails on growth performance, carcass quality, litter quality, lipid stability of the meat, and economic viability. In the metabolism assay, 108 European quails of 21 days of age were used, being distributed in a completely randomized design with 3 treatments (one reference ration and two test rations with substitution of 20% and 40% of the reference ration by PFSC) and 6 replications of 6 birds each. It was observed that the apparent metabolizable energy corrected by the nitrogen balance (AMEn) determined in the ration with 20% PFSC (3876.17 kcal/kg DM) was higher than in the 40% (3469.00 kcal/kg DM). In the performance assay, 432 European quails from 7 to 42 days of age were used, being distributed in a completely randomized design with 6 treatments, consisting of a control diet and the others with increasing levels of inclusion of passion fruit seed (5, 10, 15, 20, and 25%), and 6 replications of 12 birds. It was observed that the inclusion of PFSC starting from 10% promoted increase FI and FC values, and increasing linear effect of these variables starting from 5% of inclusion. The PFSC did not affect the carcass characteristics and lipid oxidation of the meat. Regarding the litter quality, there was a linear increase in the pH values and worse economic indexes starting from the inclusion of 10% of PFSC. In conclusion, PFSC can be used up to the level of 5% in diets for meat quails from 7 to 42 days of age.

Organic zinc and manganese and 25-hydroxycholecalciferol improves eggshell thickness in late-phase laying hens.

The aim of this study was to evaluate the effects of organic micromineral zinc (Zn) and manganese (Mn) and 25-hydroxycholecalciferol supplementation in late-phase laying hens' diets on performance, egg quality, lipid stability of fresh and stored eggs, and bone quality. The treatments were a basal diet and diets supplemented with 32 mg Zn-Met/kg diet; 26 mg Mn-Met/kg diet; 32 mg Zn-Met/kg diet and 26 mg Mn-Met/kg diet; 1500 IU 25-hydroxycholecalciferol/kg diet; 32 mg Zn-Met/kg diet; 26 mg Mn-Met/kg diet; and 1500 IU 25-hydroxycholecalciferol/kg diet. On performance, the birds supplemented with organic manganese had the lowest feed intake. Regarding egg quality, the birds supplemented with Zn-Met and Mn-Met, with 25-hydroxycholecalciferol alone, and with Zn-Met, Mn-Met and 25-hydroxycholecalciferol presented a greater eggshell thickness than those receiving the basal diet. Lipid stability of the yolk varied only according to storage time. No effect of supplementation was observed on bone quality. Supplementation with Zn-Met and Mn-Met, or associated with 25-hydroxycholecalciferol, or 25-hydroxycholecalciferol alone, improved eggshell thickness in aged white layers. However, the associated or isolated supplementation with these nutrients did not influence performance, lipid stability of fresh and stored egg yolk or bone quality.

Fresh and stored copra meal in meat quail diets.

The aim of the current study was to evaluate the addition of fresh and stored copra meal to the diet of meat quails. Two hundred eighty-seven-day-old male and female quails were distributed in a completely randomized design, with five treatments, in a 2 × 2 + 1factorial arrangement. Two copra meal types (fresh and stored) at inclusion levels of 12.5% and 25%, respectively, were added to a corn-soybean meal-based diet, with seven replicates, of eight quails each. Copra meal acidity index recorded oleic acid percentage increase from 0.47 to 3.03% after six storage months. However, regardless of storage type, its addition to quails' diet resulted in higher values of metabolizable energy, in lower feed intake and better feed conversion than corn-soybean meal diet. Copra meal addition to quails' diet did not affect carcass traits, liver and pancreas relative weight, and bone growth and quality. Although copra meal storage for 180 days resulted in higher free fatty acid content in the provided feed, it can be used fresh or after storage, in diet of meat quails from 7 to 42 days of age up to 25%.

Cashew nut meal in the feeding of meat quails.

A study was aimed to evaluate the effects of cashew nut meal inclusion (CNM) on nutrient digestibility, performance and carcass characteristics of meat quails. A total of 432 meat quails with 7 days of age, were distributed in a completely randomized design with six treatments and nine replicates of eight birds each. Treatments were obtained with inclusion of CNM at levels of 0, 50, 100, 150, 200, and 250 g/kg. According to regression analysis, the inclusion of CNM, at levels above 50 g/kg, provided a linear reduction in digestibility of dry matter and metabolizable energy of diets, linear increase in feed intake and an increase in feed conversion ratio, not influencing weight gain and carcass characteristics. Comparing the results obtained with the different inclusion levels compared to those obtained with the diet without CNM (control group), it was noted that diets with 200 g/kg of CNM inclusion, the dry matter digestibility and metabolizable energy of diet were lower and the level of 250 g/kg provided higher feed intake. Considering the results, it can be inferred that cashew nut meal can be used as a feedstuff in meat quail's diets at levels up to 250 g/kg.

Effect of dietary ethanol extracts of mango (Mangifera indica L.) on lipid oxidation and the color of chicken meat during frozen storage.

The aim of this study was to evaluate the dietary effect of mango extracts on lipid stability and the coloring of broiler chicken breast meat during frozen storage. The treatments consisted of broiler chicken diet without antioxidants (control) and diets containing antioxidants: 200 ppm of butylated hydroxytoluene (BHT), 200 ppm of mango peel extract (MPE), 400 ppm of MPE, 200 ppm of mango seed extract (MSE), and 400 ppm of MSE. The broiler breasts were stored for 90 days and analysis of lipid oxidation and color was performed every 30 days. The thiobarbituric acid reactive substances values increased during storage and at 90 days, but the 400 ppm MSE treatment yielded lower values, indicating greater antioxidant activity. During storage, the lightness values decreased and the redness increased. Additions of 200 ppm BHT and 400 ppm MPE increased yellowness at 60 days of storage. Thus, mango peel and seed extracts added to broiler chicken diets reduce lipid oxidation and maintain color in breast meat during frozen storage, with mango seed extract at 400 ppm being the most effective.

Sunflower cake associated with crude glycerin in white laying hens diets: Performance and quality, antioxidant activity and lipid oxidation of eggs.

The objective of this study was to evaluate the effects of sunflower cake inclusion and its association with crude glycerin in the diet of laying hens. A total of 320 laying hens with 39 weeks of age were distributed in a completely randomized design in a 4 × 2 factorial scheme with 5 replications of 8 birds. The studied factors were 4 inclusion levels of sunflower cake and 2 levels of crude glycerin. The inclusion of 210 g/kg of sunflower cake reduced egg mass and worsened feed conversion, and after the level 70 g/kg there was reduction in yolk coloration and specific density of eggs with or without the addition of glycerin in the diet. The addition of 70 g/kg of crude glycerin reduced the specific density of eggs in all levels of sunflower cake. There was increase in phenolic compounds, antioxidant capacity and antioxidant activity in eggs and reduction in lipid oxidation of yolks from fresh and stored eggs, with the inclusion of sunflower cake. The addition of crude glycerin increased the lipid oxidation of egg yolks. Therefore, it is possible to include up to 140 g/kg sunflower cake in the diet of laying hens, with or without crude glycerin, without impairing performance and egg quality, obtaining higher antioxidant capacity of eggs and lower lipid oxidation in yolks from fresh and stored eggs. The inclusion of 70 g/kg crude glycerin does not affect laying hens performance, however, it worsens shell quality and increases lipid oxidation in the liver and egg yolks.

Beta-Carotene Supplementation for Sows: Reproductive Parameters and Productive Performance of Piglets.

The rapid fetal development and the increased demand for milk result in a catabolic state and oxidative stress in hyperprolific sows. Despite animal defense mechanisms, the dietary supplementation of antioxidants is being evaluated to reduce the impacts of excess free radicals. The aim of this study was to evaluate the short- and long-term effects of beta-carotene supplementation for sows on the reproductive response and performance of suckling piglets. A total of 120 sows were distributed in a 3 × 4 factorial arrangement of three supplementation levels (B0-no supplementation, B200-200 mg beta-carotene/day and B400-400 mg beta-carotene/day) and four groups of parity order (1st, 2nd, 3rd, above 4th). Beta-carotene supplementation during lactation resulted in a higher litter weight at weaning. A higher average weight of piglets and litter weight at birth were observed, as well as a greater number of piglets weaned and litter weight at weaning in sows supplemented with 400 mg of beta-carotene during gestation and lactation periods. Supplementation with 200 and 400 mg of beta-carotene resulted in a greater weight at weaning and daily weight gain in piglets. Daily supplementation with 400 mg of beta-carotene in the prepartum and lactation phases provides a greater litter weight at weaning and, when supplemented in the pre-gestation and gestation periods, results in a greater litter weight at birth and at weaning.