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• Effects of Dietary Sesame Oil Supplementation on Growth Performance, Feed Utilization, and Fillet Quality in Nile Tilapia

  Nguyen Thi Mai, Tran Thi Nang Thu

  Received: Sep 28, 2024 / Accepted: Mar 21, 2025 / Published: Mar 31, 2025

   Abstract PDF

  Sesame oil is an ideal lipid source replacing the fish oil in fish diet thanks to its fatty acid profile and sensory characteristics. This study was conducted to evaluate the impacts of dietary sesame oil supplementation on growth, feed utilization, and fillet quality of Nile tilapia in growth-out stage. The basal feed for tilapia was supplemented with sesame oil at ratios of 0, 10, 20, and 40 g kg-1 corresponding to AS0, AS10, AS20, and AS40 treatments. Fish (~80g) were fed to apparent satiation for 6 weeks. Fish were weighed periodically to monitor the growth rate. At the end of the experiment, fish were dissected to collect the fillet and measure the intestinal indicators; the number of fish and amount of consumed feed served to calculate the survival rate, feed conversion ratio, and protein efficiency rate. Fillet samples were then used to analyze the fatty acid composition, chemical composition, physicochemical indicators, and sensory characteristics. The results showed that the highest value of fish growth and feed utilization were found in AS20. The sesame oil levels did not modify the intestinal parameters but changed the hardness and lightness of fish fillet. The sensory parameters including aroma and sweetness were highest in AS20 and AS40. The significant differences were recorded in total lipid and fatty acid level in fish fillet. In conclusion, the supplementation of sesame oil at 20 g kg-1 diet brings the benefits in fish growth and fillet quality of Nile tilapia in growth-out stage from 80 to 300 g/fish.

• Effects of Dietary Lupin (Lupinus angustifolius) Inclusion on the Growth Performance of Growing–Finishing Pigs

  Lo Van Nhu, Dang Thai Hai, Dinh Thi Yen, Nguyen Thi Phuong Giang , Nguyen Thi Vinh, Bui Huy Doanh

  Received: Jun 17, 2025 / Accepted: Sep 04, 2025 / Published: Sep 30, 2025

   Abstract PDF

  This study investigated the potential of replacing soybean meal with lupin (Lupinus angustifolius) at varying inclusion levels in the diets of growing–finishing pigs from 12 to 22 weeks of age. A total of 120 crossbred pigs (Duroc × [Yorkshire × Landrace]) were randomly assigned to one of four dietary treatments: a control diet without lupin (LP0), and diets containing 5% (LP5), 9% (LP9), or 12% (LP12) lupin. Growth performance parameters were recorded over a 70-day feeding period. Pigs fed the LP12 diet exhibited a significantly lower body weight and average daily gain (P <0.05) than those fed the LP0, LP5, and LP9 diets. Feed intake did not differ significantly among the treatments (P >0.05), whereas the feed conversion ratio was significantly higher in the LP9 and LP12 groups than in LP0 and LP5 (P <0.05). Economic analysis indicated that the LP5 diet provided the greatest economic benefit, reducing feed cost per kilogram of gain without impairing performance. These findings suggest that the dietary inclusion of lupin up to 9% does not compromise growth performance, with 5% being the most economically advantageous level for fattening pigs.

• Digestibility of Different Plant-derived Oils and their Influence on Fatty Acid Composition in the Liver and Muscle of Juvenile Common Carp (Cyprinus Carpio)

  Nguyen Thi Mai, Kestemont Patrick, Mellery Julie, Larondelle Yvan, N.M. Mandiki Syaghalirwa, Nang Thu Tran Thi

  Received: Oct 30, 2021 / Published: Sep 30, 2022

   Abstract PDF

  We evaluated the digestibility of plant oils and their influence on the growth of and fatty acid composition in common carp. Apparent digestibility coefficients (ADC) of lipids were determined in carp (200.2 ± 40.0g) fed with cod liver oil (CLO), linseed oil (LO), sunflower oil (SFO), or sesame oil (SO). A 96-day growth trial was then conducted using six isolipidic (from 100 to 101 g/kg diet) diets, namely CLO, LO, SFO, SO, and two blends of plant oils (SLO = SO + LO; SSFO = SO + SFO). Lipid ADC values (0.920-0.972) were similar or slightly lower in the plant oil-based diets than in the CLO-based diet. Growth and feed efficiency (FE) were not influenced by dietary lipids. The fatty acid profile in the liver and muscle reflected those of the dietary lipids. The EPA and DHA proportions were higher in the liver and muscle of the LO and SLO-fed fish than in the other plant oil groups, and lower than in CLO-fed fish (P <0.05). Higher EPA, DHA, and n3/n6 ratio levels in the muscle of fish fed on the linseed oil (LO) diet, as compared to those in fish fed on the other plant oil-based diets, were ideal for human health and suggest that it can be used as a suitable alternative to fish oil.

• Impacts of Dietary Supplementation of Peptidoglycan Extracted from Lactobacillus sp. on the Growth Performance and Resistance to Streptococcus Agalactiae of Nile Tilapia

  Nguyen Thi Mai, Mai Van Tung, Do Hoanh Quan, Vu Thi Thanh Huong, Nguyen Thu Hang

  Received: Mar 14, 2023 / Published: Jun 30, 2023

   Abstract PDF

  The current experiment aimed to determine the effects of peptidoglycan, known as a prebiotic compound, on the growth, feed efficiency, and disease resistance in Nile tilapia. Fish at an initial body weight of 22.6 ± 0.3g were distributed into a 100 L-glass tank system. Peptidoglycans extracted from Lactobacillus sp. were added to commercial feed at ratios of 0, 5, and 10 g kg-1 diet corresponding to the PG0, PG5, and PG10 treatments, respectively. Fish were then fed at 4% their body weight for four weeks. After a 4-week trial, fish were infected with Streptococcus agalactiae at 50% the lethal dose (1.1×106 CFU mL-1), and monitored for 14 days. After 2 and 4 weeks of the feeding trial (T2 and T4) and on the second day of the bacterial challenge, fish blood samples were collected for hematological analysis. The results indicated that the dietary supplementation of peptidoglycan induced a positive effect on fish growth performance and the highest value was observed in the PG5 treatment. The lowest value of cumulative mortality was also observed in the PG5-fed fish indicating that the dietary supplementation at 5 g kg-1 diet supported the highest resistance to S. agalactiae. In conclusion, the beneficial effects of dietary supplementation of peptidoglycan extracted from Lactobacillus sp. were recorded on the growth performance and disease resistance in Nile tilapia.