In the current study the hypothesis that 1.0% dietary inclusion of glutamine (Gln), a conditionally essential amino acid that influences protein synthesis and shows anti-osteoporotic effect, can influence eggshell quality was tested on laying hens in the post-peak laying period. A 30-week-old Bovans Brown hens were randomly assigned to control group or group supplemented with Gln in the form of alpha-ketoglutarate (10 g/kg) with 12 replicate cages (2 hens/cage) in each group. The experimental period lasted for 30 weeks, from the 31st to the 60th week of age of hens, when eggs were collected and selected eggshell quality indices were determined. While Gln supplementation had no effect on egg geometry and eggshell cracking force, the analysis of eggshell quality showed an increase of the eggshell thickness (P<0.01), porosity (P<0.01), eggshell specific surface (P<0.001) and positive changes in other mechanical parameters (decrease of eggshell stiffness and Young’s modulus, P<0.05 and P<0.01, respectively; increase of work needed to crack the eggshell, P<0.05). Changes in eggshell mineral composition, including an increase of Ca content (P<0.001), were also observed. In conclusion, the current study showed a beneficial effect of Gln on the eggshell thickness, calcification, and some mechanical parameters.
Lactobacillus casei (IBRC-M 10,711) ameliorates the growth retardation, oxidative stress, and immunosuppression induced by malathion toxicity in goldfish (Carassius auratus )Differences and changes: an evaluation of the genetic diversity of Arabian mares from Polish state studs born between 1996 and 2013 Bio-active components in medicinal plants: A mechanistic review of their effects on fish growth and physiological parameters Evaluating local strains of soybean and corn cultivars in the diets of Nile tilapia ( Oreochromis niloticus ): growth and insulin-like growth factor 1, intestinal health, and inflammation featuresEffects of different carbon sources on water quality, biofloc quality, and the productivity of Nile tilapia reared in biofloc-based ponds Tomato pomace waste as safe feed additive for poultry health and production – a review Effect of dietary β-Mannanase addition on performance, pododermatitis, and intestinal morphology as well as digesta Clostridium perfringens in broiler chickens: a pilot studyDifferent dietary ratios of arginine, methionine and lysine for turkeys: effects on whole-body composition and nutrient utilization efficiency in the early growth stage Evaluating the growth of genetically improved tilapia Oreochromis niloticus reared at different temperaturesThe effects of different stocking densities on nursery performance of Banana shrimp ( Fenneropenaeus merguiensis ) reared under biofloc conditionNew long-non coding RNAs related to fat deposition based on pig model The effects of coriander ( Coriandrum sativum ) seeds on the growth performance, growth hormone, antibacterial capacity, and immune response of European sea bass (Dicentrarchus labrax )Dietary L-glutamine affects eggshell quality in the post-peak laying period Rapeseed meal as a feed component in monogastric animal nutrition – a review A review on recirculating aquaculture system: influence of stocking density on fish and crustacean behavior, growth performance, and immunity Zinc-binding proteins in stallion seminal plasma as potential sperm function regulators Specific importance of low level dietary supplementation of Lypomyces starkeyi CB1807 yeast strain in red sea bream (Pagrus major )Embryo production by in vitro fertilization in wild ungulates: progress and perspectivesThe effect of prostaglandins E2 and F2α on orexin system expression in the porcine uterus during the peri-implantation period The effects of dietary stachyose as prebiotic on immunity and anti-oxidant related genes’ expression and lipid metabolism in zebrafish ( Danio rerio )Effect of high hydrostatic pressure on the in vitro development and molecular quality of transgenic rabbit embryos derived from nano-transfected zygotesThe pharmaco-therapy potential of astaxanthin: human and animal targeting roles The assessment of the efficacy of STRs panels recommended by the ISAG for canine pedigrees analysis for forensic casework Dose-response effects of the Savory ( Satureja khuzistanica ) essential oil and extract on rumen fermentation characteristics, microbial protein synthesis and methane productionin vitro Influence of nitrate supplementation on in-vitro methane emission, milk production, ruminal fermentation, and microbial methanotrophs in dairy cows fed at two forage levelsDietary silage supplement modifies fatty acid composition and boar taint in pork fat The effect of the application of diets with varied proportions of arginine and lysine on biochemical and antioxidant status in turkeys β-glucan as a promising food additive and immunostimulant in aquaculture industry The importance of nutrition in alleviating high stocking density stress in poultry Effect of supplementation of freezing media with isoespintanol on functional integrity of equine semen Protective effects of dietary Lavender ( Lavandula officinalis ) essential oil against Malathion-induced toxicity in rainbow trout (Oncorhynchus mykiss )Effects of dietary Gracilaria persica on the intestinal microflora, thyroid hormones, and resistance againstAeromonas hydrophila in Persian sturgeon (Acipenser persicus )Effect of the polymorphism of genes related to lactogenesis in pigs on colostrum and milk composition and on rearing performance of piglets Gene expression adjustment of inflammatory mechanisms in dairy cow mammary gland parenchyma during host defense against staphylococci Understanding microbial networks of farm animals through genomics, metagenomics and other meta-omic approaches for livestock wellness and sustainability Sudden death syndrome in broiler chickens: a review on the etiology and prevention of the syndrome Nanowater enhances cryoprotective properties of glycerol-containing extenders used for ram semen freezing: A preliminary study spanning laboratory testing The multi-enzymes and probiotics mixture improves the growth performance, digestibility, intestinal health, and immune response of Siberian sturgeon ( Acipenser baerii )Evaluation of the tRNA-Leu (UUR) gene haplotype profile observed in canine mammary gland tumours based on comparative analysis with theMT-TL1 human geneEffect of enzymatic pro-oxidant and antioxidant systems on bovine oocyte in vitro maturationIncreased incidence and antimicrobial resistance among Vibrio parahaemolyticus in shellfishes from major fish markets in Cochin, South India: Seafood risk assessmentThe effect of supplementation with β-hydroxy-β-methylbutyric acid (HMB) to pregnant sows on the mucosal structure, immunolocalization of intestinal barrier proteins, VIP and leptin in the large intestine in their offspring Potential of graded doses of neem ( Azadirachta indica ) seed oil on ruminal fermentation characteristics, degradability, and methane formationin vitro Effects of broiler chicken age and dietary protease on the standardised ileal digestibility of amino acids in seeds from two lupin species Why Osteoglossomorpha is one of the most peculiar groups of fish - a review Aquamimicry system: a sutiable strategy for shrimp aquaculture – a review The use of artemia for aquaculture industry: An updated overview Effect of serum starvation and contact inhibition on dermal fibroblast cell cycle synchronization in two species of wild felids and domestic cat Dietary Sargassum angustifolium (Macro-Algae, Sargassaceae) extract improved antioxidant defense system in diazionon-exposed common carp,Cyprinus carpio Effects of dietary halloysite supplementation on broiler chicken’s blood parameters, carcass and meat quality, and bone characteristics: a preliminary study Effects of higher plasma growth hormone levels on subclinical ketosis in postpartum Holstein cows The quality of duck meat – from the perspective of physical measurements and expert judgment Fibrolytic enzymes increases fermentation losses and reduces fiber content of sorghum silage How potentially sustainable solutions may be unsustainable in practice: carrot pomaces in common carp nutrition