International Research Conference of UWU-2021

Permanent URI for this collection

https://erepo.lib.uwu.ac.lk/handle/123456789/8715

Browse

Browsing International Research Conference of UWU-2021 by Subject "Animal Production"

Now showing 1 - 5 of 5
  • No Thumbnail Available
    Item
    Analysis of Consumption Patterns of Probiotic Incorporated Fermented Dairy Products in Sri Lanka
    (Uva Wellassa University of Sri Lanka, 2021) Hanouf, M.H.M.; Rathnayaka, S.D.; Abesinghe, A.M.N.L.
    Probiotic dairy foods are considered as one of the major functional food substances in the world. Consumers have been more health conscious in recent years, and as a result, they are seeking more information on how to live a healthy life consuming good food. Probiotic and probiotic products are having the possibility to attract those health-conscious consumers because of their health promoting effects and lower cost. To our knowledge there are no studies that analyze the consumer demand for probiotic fermented dairy products in Sri Lanka. This study focused on analyzing the consumer knowledge, attitudes, socio-demographic and economic factors that affect the consumption pattern of probiotic fermented dairy products in Sri Lanka. A total of 405 households from all nine provinces in Sri Lanka were surveyed with an online questionnaire. According to the results, 46% of the respondents have awareness of probiotics. Probiotic consumption was categorized into 4 levels as not at all, low, medium, and high based on the probiotic consumption per week. The study showed that 53% of the respondents belongs to low-level consumption category, 27% have medium level consumption, 9% are in high-level consumption category and 11% of the responders never consumed probiotic incorporated dairy products. An ordered logistic regression model was employed to analyze the relationships between probiotic consumption level and the number of demographics, socio- economic characteristics of consumers such as gender, age, marital status, household size, presence of children, household income, locality, education level, attitudes on health and nutrition aspects, attitude on sensory aspects, advertisement aspects and poor availability of probiotic dairy products. The results reveal that probiotic consumption level is significantly and positively influenced by gender, marital status, household income, advertisements, and consumer‟s attitude on health and negatively influenced by household size and poor availability. Findings of this study give useful information to producers for their production and marketing strategies which are most suitable to fit with the demand characteristics and consumer expectations. Keywords: Probiotic; Dairy Products; Consumption Patterns; Ordered Logistic Regression; Sri Lanka
  • No Thumbnail Available
    Item
    Association between Body Weight and Gait Score of Broiler Meat Chicken
    (Uva Wellassa University of Sri Lanka, 2021) Sonali Marasinghe, M.A.; De Silva, P.G.J.C.; Kurukulasuriya, M.S.
    The global demand for chicken meat is increasing and new poultry strains have been developed by genetic improvement targeting production traits to fulfill the higher demand. Since, genetic improvements have not focused on improving skeletal confirmation in parallel to production traits; birds can get leg deformities disturbing their walking pattern which can manifest as higher gait score (GS). Study focused to identify the association between body weight (BW) and GS in broiler chicken. A total of 100, day-old Cobb chicks (76-female; 24-male) were randomly selected and managed conditions. GS with 0(zero) to 5(severe) levels and BW of the birds were recorded separately at the age day-14, day-21, day-28 and day-35. Spearman correlation was calculated between BW and GS at each sampling day using MINITAB-17 and mean BWs difference of birds in each GS category was obtained by repeated measures of ANOVA (RMANOVA) using SAS-9.2. Frequency of birds in each GS category was obtained. Significant weak positive correlation between BW and GS is reported only at day-35 (Spearman-Rho=0.289; P<0.05). When consider the sex, similar significant weak positive correlation is observed in females (Spearman-Rho=0.364; P<0.05) at day-35 reflecting correlations observed in whole flock at day-35, may have mainly contributed from females. RMANOVA revealed a significant effect of time and GS×time interaction on BW (P<0.05). Significantly higher BW (P<0.05) has observed in birds belonging to the higher GS categories at day-35 (GS0=1660.83±59.13; GS2=1796.49±38.65; GS3=1913.39±30.16; GS4=1803.00±111.18) indicating BW of birds has directly affected on their walking pattern. Frequency of birds belonging to GS-0 is continuously declining from 99% at day-14 to 15.2% at day- 35. Further, more than 50% of birds showed GS-3 (48.5%) and GS-4 (3%) at day-35 reflecting without external visible changes in the skeletal confirmation; birds are suffering from pain in walking which is an important animal welfare issue. None of the birds reported GS-5 throughout the experiment. It can be concluded that increase BW leads to chronic pain which reflects as higher GS. At slaughtering age, birds are suffering from pain in walking without changes in external skeletal confirmation. Future research can be focus on genetic improvement of skeletal confirmation of birds to tolerate increased BW. Keywords: Body weight; Broilers; Chicken; Gait score
  • No Thumbnail Available
    Item
    Development of Omega-3 Fish Oil Fortified Functional Stirred Yoghurt by Incorporating Annona muricata (Soursop)
    (Uva Wellassa University of Sri Lanka, 2021) Shanuke, D.S.; Marapana, R.A.U.J.; Hettiarachchi, S.; Edirisinghe, E.M.R.K.B.
    Fish oil is an ideal source of Omega-3 polyunsaturated fatty acids (PUFAs) which lower the risk of numerous non communicable diseases. Consumption of fish oil is not popular in Sri Lankan community. This study aimed to develop a fish oil fortified functional stirred fruit yoghurt to deliver Omega-3 PUFAs and to evaluate the effect of fortifying yoghurt with fish oil on sensory, physicochemical properties and oxidative qualities. Initial sensory analysis for fish oil fortified yoghurt was performed by adding 5% (w/w) three different fruit juices including soursop, mango and pineapple by thirty untrained panelists. Fish oil fortified soursop added stirred yoghurt showed the highest score for overall acceptability as 7.32 ± 0.85 (p < 0.05). Results of second sensory analysis have shown that addition of soursop up to 15% (w/w) level was considerably masked the fishy odor and flavor of fish oil (1% w/w) fortified yoghurt. Fish oil emulsion was prepared with guar gum, gelatin and glycerol using Nano emulsion technique. Physicochemical and oxidative qualities were compared among fish oil emulsion added soursop yoghurt (FOESY), fish oil fortified plain yoghurt (FOPY) and bulk fish oil fortified soursop yoghurt (BFOSY) during the storage of 21 days at 4°C. Peroxide values (PV) were analyzed to determine oxidative stability. Syneresis values increased in all yoghurt samples during storage. The highest syneresis value of 45.18 ± 1.98 was recorded by FOPY on day 14. BFOSY and FOESY showed significantly lower syneresis (p < 0.05). pH values gradually decreased and titrable acidity values as lactic acid increased in all treatments during storage.The pH values of both FOESY and BFOSY was 4.5± 0.01 at day 14. FOESY recorded the lowest (p < 0.05) PV (4.64 ± 0.12 mEq O2 kg-1) at day 21 compared to BFOSY and FOPY. The Escherichia coli and coliform counts were complied with the requirements of SLS but yeast and molds counts had exceeded SLS limits after 14 days. This study demonstrated the potential of producing fish oil emulsion fortified functional yoghurt with acceptable level of sensory characteristics, physicochemical properties and oxidative stability by incorporating soursop juice. Keywords: Omega-3; Fortification; Fish oil; Yoghurt; Soursop
  • No Thumbnail Available
    Item
    Effect of Feeding Silage Incorporated Ration on Production Performances of Temperate Crossbred Dairy Cows in Dry Zone of Sri Lanka
    (Uva Wellassa University of Sri Lanka, 2021) Priyankara, D.M.; Silva, K.F.S.T.; Mudannayake, D.C.; Abesinghe, A.M.N.L.; Rajapaksha, R.M.C.L.; Epa, A.; Ranaweera, K.K.T.N.
    Forage scarcity during the drought seasons has a negative impact on productivity of dairy cows reared in the Dry Zone of Sri Lanka. Therefore, utilization of conserved forages (i.e., silage) was identified as a reliable solution for this. Current study was conducted to assess the effect of commercially available silage on production performances and profitability of temperate crossbred dairy cows reared in Dry Zone, Sri Lanka. Fourteen multiparous, temperate crossbred (Jersey Friesian) dairy cows with 430.1 ± 4.01 kg average body weight were used for the experiment. Cows were divided in to two groups considering the provision of a forage-based ration (Control) and a forage & silage (30% fresh matter) mixed ration (Treatment). Silage utilized in the study was a commercially available corn-based silage product. Cows were fed for 5 weeks during the months of February and March. The experiment was on a randomized complete block design with two treatments (i.e., forage-based diet alone and forage & silage mixed diet) and the lactation stage was considered in blocking the animals (early lactation and mid lactation). Body weight, fresh matter intake, individual milk yields were recorded. Ration samples were collected and analyzed for dry matter, ash, crude protein, crude fat, acid detergent fiber content and neutral detergent fiber content. Benefit Cost ration (B:C Ratio) was calculated to assess the profitability of the feeding regimens. Cows fed with corn silage had recorded significantly higher (P<0.05) per day milk production compared to cows did not receive a corn silage-based ration. As such, silage feeding resulted 23.57 L/cow higher (P<0.05) cumulative milk production at five weeks compared to their counterparts (104.96 vs. 81.39 L/cow). Silage feeding did not indicate any significant (P>0.05) effect on fresh matter intake and body weight gain of the experimental cows. Further, both control and treatment rations indicated B:C ratios higher than one (01) throughout the experimental period. It indicted that both rations were profitable to be utilized in proper circumstances. Considering the increment of milk production and the profitability, silage feeding could be recommended as a promising solution for forage scarcity faced by dairy farmers during the drought seasons. Keywords: Corn silage; Dairy cows; Drought season; Milk production
  • No Thumbnail Available
    Item
    Effects of a Novel Starter Feed on Growth Performances of Underweight Broiler Chicks
    (Uva Wellassa University of Sri Lanka, 2021) Sinhadhipathi, S.M.W.; Prabashwari, T.I.G.; Jeyaharan, T.; Himali, S.M.C.
    This study was carried out to evaluate the effects of a novel starter feed for underweight broiler chicks to achieve the expected growth performances and feed conversion ratio (FCR) than the available commercial starter ration. The novel starter feed was formulated with addition of 3% digestible lysine, Bioplex organic mineral and organic acid (Avila Zn) at a rate of 750 g and 330 g per metric tons of feed respectively with other essential amino acids compared to Pussalla Feed Broiler Starter Crumble. The control feed was basically formulated with corn and soya bean meal without addition of organic mineral and organic acid. In this present study, a feeding trail was conducted using underweight (32.48 ± 1.79 g) day old Hubbard Classic chicks (1200) by providing ad libitum of two types of starter feed to each 12 groups having 50 birds. The two groups of underweight chicks were fed with two starter feed up to 14 days and the Pussalla Feed Broiler Finisher Pellet was fed on 14-33 days to both groups. Daily feed intake, weekly body weight, FCR and mortality of underweight broiler chicks were recorded during the experimental period. The experimental design was Complete Randomized Design and data were analyzed by using one way ANOVA. Proximate analysis, sugar, starch and metabolizable energy were not different (p>0.05) in two starter rations. The results revealed that the novel starter feed directly influenced to higher weekly weight gain of broiler chicks at 7 and 14 days as 11.70% and 21.95%, respectively while lower FCR at 7 and 14 days as 20.48% and 13.33%, respectively compared with the control group (p<0.05). The novel starter fed chicks had lower (p<0.05) mortality (3.0 ± 0.01%). Thus, it can be recommended as a solution for low growth performance of underweight chicks and reduction of profit losses of Pussalla Broiler Farm in economically when compared to previous farm records of growth performances. Keywords: Feed conversion ratio; Feed intake; Growth performance; Starter feed; Underweight chicks