Publications by authors named "Shan R Nawarathne"

Laying hen responses to supplemental multiprotease on performance, egg quality, digestibility, gut histomorphology, nitrogen excretion, and economic performance of laying hens until 37 weeks of age were investigated. A total of 189 25-week-old Hy-Line Brown hens were housed in enriched cages (7 birds/cage) and randomly allocated to 1 of 3 diets with 9 replicates per treatment. Dietary treatments included: an adequate positive control- PC [met the breed and age standards for crude protein (CP) and amino acids (AA)]; negative control- NC (90 % CP and AA requirement); and NC supplemented with multiprotease - NCMP.

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The impact of crating density and prevailing weather conditions during transit on preslaughter losses, physiological characteristics, and meat quality in broilers was investigated. A total of 900 35-day-old Ross 308 male broilers with an average body weight of 1,860 ± 17.458 g (mean ± SEM) in summer and 1,864 ± 17.

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Article Synopsis
  • - The study investigates how different crate types (plastic vs. iron) affect the welfare and meat quality of broiler chickens during winter transport, noting that drug stress can impact meat yield and quality.
  • - A total of 175 male Ross 308 broilers were compared, with some transported in iron and plastic crates and a control group kept on the farm; results showed no differences in carcass traits, but the plastic crates were linked to lower stress indicators.
  • - Findings reveal that broilers in iron crates had higher stress levels (elevated cortisol, glucose, and lactate) compared to those in plastic crates or the control group, suggesting that plastic crates are better for welfare by reducing stress during transport.
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  • The study aimed to evaluate how phytase and multi-carbohydrase affect the growth, nutrient digestibility, and overall quality of broiler chickens fed phosphorus and energy-deficient diets.
  • A total of 288 Ross 308 broiler chicks were divided into six dietary treatment groups, including a positive control and various AP-deficient diets with or without enzyme supplements.
  • Results showed that enzyme-supplemented diets improved growth metrics like body weight and feed conversion rates, enhanced tibia mineralization, and increased leg meat yield, with the best results seen in the diet combining both phytase and multi-carbohydrase.
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  • Duck meat is a healthier option due to its higher unsaturated fats, iron, and protein, which can lower bad cholesterol and improve immunity.
  • The study examined the effects of different rice hull bedding depths (4 cm, 8 cm, 12 cm, and 16 cm) on the growth and meat quality of White Pekin ducks over 42 days.
  • Results showed that ducks with 16 cm bedding had the best growth performance and lowest fat in breast meat, and while bedding depth impacted some factors, it didn't significantly affect meat composition, footpad dermatitis, or mortality rates.
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The digestibility of crude protein (CP) and amino acids (AA) in feedstuffs including corn, soybean meal (SBM), and corn distillers dried grains with solubles (DDGS) was investigated in White Pekin ducks. The test ingredients were the sole source of AA and CP. A nitrogen-free diet was also formulated for determining endogenous losses of AA and nitrogen.

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The effect of different commercially available bedding materials on the growth performance and carcass characteristics of ducks for 42 days was investigated. 336 one-day-old White-Pekin ducklings (60.48 ± 0.

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We aimed to compare the combinatorial effect of 3,4,5-trihydroxybenzoic acid (THB) and oregano extracts (OE) with THB alone on the growth performance and elimination of deleterious effects in coccidiosis-infected broilers. A total of 210 one-day-old broilers were randomly assigned to one of five dietary treatments, with six replicates each, for 35 days. Dietary treatments were: 1) non-challenged, non-treated (NC); 2) challenged, non-treated (PC); 3) PC+ Salinomycin (0.

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Objective: To investigate the physiological effects of exogenous emulsifiers in broiler chickens that were fed tallow-incorporated reduced-energy diets over 35 days.

Methods: A total of 256 Ross 308 one-day-old broilers (42.28±0.

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  • The study aimed to assess the impact of calcium-enriched fatty acid supplementation on the growth and health of broilers under chronic heat stress conditions.
  • Broilers were given different diets and subjected to heat stress from day 21 to 35, with results showing that those receiving 2.0% calcium-enriched fatty acids had significantly better body weight and feed efficiency during this period.
  • While the treatment improved certain growth metrics, no notable differences were found in carcass traits, blood metabolites, or nutrient digestibility between the dietary groups overall.
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This study was conducted to evaluate the efficacy of a combination 3,4,5-trihydroxybenzoic acid (THB) and oregano extracts (i.e., Carvacrol and Thymol) at intake/dietary different levels on growth performance, intestinal health indicators, immune responses and fecal oocyst shedding in broiler chickens under challenged condition.

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The present study was conducted to investigate the effect of a multi-protease on production indicators of broiler chickens fed a crude protein and amino acid deficient-diets for 35 days immediately after hatch. A total of 448 one-day-old Ross 308 male broiler chicks were allocated in a completely randomized design into one of eight dietary treatments (positive control [PC], negative control [NC: minus 0.5% from PC, and minus 2% of lysine, methionine, threonine and methionine plus cysteine], extreme negative control [ENC: minus 1% from PC, minus 4% of lysine, methionine, threonine and methionine plus cysteine], and plus multi-protease 150 or 300 g per ton [e.

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The current study was aimed to examine the effect of partial or complete replacement of fishmeal (FM) with fermented soybean meal (FSBM) on growth performance, fecal composition, and meat quality in broiler chickens. A total number of 240 one-day-old broiler chicks were randomly allotted into four dietary treatments with six replications and ten birds per one pen. Dietary treatments were followed as; 1) Diet incorporated with 4% FM without FSBM (Control), 2) Diet incorporated with 3% FM and 2% FSBM (FSBM2), 3) Diet incorporated with 2% FM and 3% FSBM (FSBM3) and 4) Diet incorporated with 4% FSBM without FM (FSBM4).

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