The article presents a short review of metallic glass, the material that promises a lot of applications in the future. The yield strength of this new material is ten times higher than that of polymers and the elastic strain limit is double that of conventional metallic alloys. This article presents the general knowledge, methods of preparation, the difference between metallic glass and crystalline metal, the remarkable properties along with potential applications and problems that exist in studying of this new material. 

Academic advising plays an important role in the study result and student’s punishment, particularly in the adaptive credit-based learning environment. Academic advisor contributes critically to the links between students, the curriculumn vitea and the university. However, the efficiency of this task in many universities, especially in Vietnam, is still limitted as most of the academic advisors are doing this task concurrently with their teaching. This leads to the lack of thorough attention of advisors to the students because they have to share time for many other tasks simultaneously. Therefore, in this paper, we propose a system to support academic advisors in order to improve the effectiveness of their advising work. In addition, the system can automate different tasks in the academic advising process that can save academic avisor’s efforts.

The study on “Biogas production from pig-raising wastewater by anaerobic package cage rotating biological contactor with rice-straw medium” was implemented to assess the possibility of using rice straw as medium to the anaerobic package cage rotating biological contactor for livestock wastewater treatment as well as the substrate for biogas production. The result of 51 days operation of 02 anaerobic package cages rotating biological contactor with rice-straw medium (LQR) shows that the total volumes of gas generated from LQR at hydraulic retention time (HRT) of 3 days and from LQR at HRT of 6 days were 2531.8 L and 2384.7 L, respectively. LQR operated at HRT of 3 days having the average organic loading rate (based on biofilm area) of 0.0263 kg COD/m2*day could remove 60.04% of influent COD. LQR operated at HRT of 6 days having the average organic loading rate (based on biofilm area) of 0.0131 kg COD/m2*day could remove 75.01% of influent COD. LQR operated at HRT of 6 days gave more effective removal of organic matter than that of LQR operated at HRT of 3 days due to sufficient time for microorganisms to decompose solids and organic substances. After stopping loaded LQR operated at HRT of 3 days the biogas output was maintained higher than that of LQR operated at HRT of 6 days (417.6 L vs. 335.1 L). The results confirmed that rice straw could be used as medium for anaerobic package cage rotating biological contactor for treating pig-raising wastewater and producing biogas.

The objective of study was to evaluate the quality of honey harvested on the Acacia hybrid and Melaleuca cajuputi forest. Plots were designed for three sites and on each site, three different age levels was selected with three replications. The data were collected in both dry and wet seasons. The results showed that there was no significant difference among the three sites, except the Melaleuca cajuputi honey had light yellow and special taste of the Melaleuca cajuputi flower while the Acacia hybrid honey was of darker. In the dry season, the water content, saccharose sugar, and vitamin C in honey were not different among the three sites, but the content of HMF and solid insoluble at Acacia hybrid zone were higher than those of the Melaleuca cajuputi x Acacia hybrid zone and Melaleuca cajuputi zone. However, vitamin B1 and pH in the Acacia hybrid zone were lower than those in the Melaleuca cajuputi zone. In the rainy season, the content of pH, HMF, vitamin B1 and vitamin C in honey among the three zones were not significantly different. The water content and levels of free acid of the Acacia hybrid honey were lower than those of the Melaleuca cajuputi, but content of reducing sugar and solids insoluble were higher. Most of the indicators of honey quality in dry seasons were better than those of rainy seasons. In both seasons, the water content and levels of solid insoluble in water did not match the regulatory standards.

The study was conducted to determine residues of the propiconazole in rice field soil and irrigation canal sediment in the triple and double rice crop farming systems and to assess relationship between the propiconazole residue and organic matter content and soil texture. The results showed that the residue of propiconazole in the soil in the triple rice crop farming system was higher than that in the double rice crop farming system, i.e. 225.17 ±15.45 µg.Kg-1 and 174.92 ±17.43 µg.Kg-1, respectively and that in the sediment were 178.39 ±11.82 µg.Kg-1 and 95.47 ±19.76 µg.Kg-1, respectively. Residues of propiconazole were positively correlated with the organic matter and clay contents with correlation coefficients of r = 0.85 and r = 0.63 (p < 0,05), respectively. Moreover, the propiconazole with high potential for bioaccumulation causes long-term adverse effects on aqua-organisms and human beings. Therefore, studies on the accumulation of propiconazole in water, sediment and aquatic populations need to be carried out in the future.

Groundwater is the main water source for agricultural cultivations in the Vinh Chau district, but it has been depressed significantly due to over-exploitation. The study aims to save water used for shallot production by applying automatic irrigation model (the Sprinklers system). The treatments of automatic irrigation were designed for 2 seasons in the study area: ealier and later season. The amount of irrigation water for shallot was determined by the CropWat model and the irrigation schedule was set based on in-situ soil moisture, measured by Takemura DM -15. The results showed that the automatic sprinklers system model saved about 25% - 69% of irrigating water and 80% - 90% of time for irrigating (calculated per 1.000m2), without any significant changes of the yield, compared to traditional irrigation method. The investment costs for automatic sprinklers system were estimated about 8 million VND/1.000m2 and it could be used for about a 4 year-period (depending on actual farming practices) for various plants. In conclusion, the automatic irrigation can be used to alter traditional technology of local famers to improve production efficiency, reduce negative impacts on groundwater and adapt to water shortage in the future.

The main aim of this paper is to study the rates of convergence in distribution of normalized geometric sum to symmetric Laplace distribution by Trotter operator method. The rates of convergence are expressed with two different types of results, namely “large-O” and “small-o” approximation estimates.

Species composition of cyanobacteria in the ecological sanctuary Dong Thap Muoi – Tien Giang was studied from September 2015 to August 2016. 49 species of cyanobacteria in 3 orders (Chroococcales, Oscillatoriales, Noctoscales), 8 families, 17 different generas were identified. The Chroococcales was the most dominant species, accounting for 55.1%, with 27 species; followed by 20 species of the Oscillatoriales occupying 40.8%. The Nostocales was the last order with 2 species, occupying 4.1%. Cyanobacteria was distributed but ununiformly in all of the examined research areas, most presented in the D01, D03, D04, D05, and D06 sites. The Chroococcales was dominant in site D04, with 17 species. Synechocystis aquatilis was widely distributed, appearing in all of the 10 examined sites.

The article proposes fuzzy time series model in forecasting crest of sanility at the three main stations of Ca Mau province: Ca Mau (Cua Lon river), Ganh Hao (Ganh Hao river) and Ong Doc (Ong Doc river). The result obtained from this method is compared with optimal non-fuzzy time series modes which are established from original data and fuzzy one by different methods. Based on statistical criterions and realistic data, the proposed time series model shows more advantageous than the existing ones. This model is used to forecast crest of sanility for each station till 2020.

We report the simulation results which compute the quantum mechanical “particle in a box" problem for a variety of different confinement shapes, such as boxes, domes, and pyramids. They are considered as the quantum dots. We explored the energy spectrum, optical absorption and orbital shapes of quantized states for the semiconductor quantum dots. From simulation data, we figured out the quantum effects in the real semiconductor material systems. We The results show that, the different confinement shapes have strong effect to on the optical absorption of the semiconductor quantum dots.

Cauchy-Dirichlet problem for the general Schrödinger systems in domains containing conical points has been investigated by Nguyen Manh Hung (1998).  In this paper, we study the second initial boundary value problem for second-order Schrödinger equations   in cylinders with nonsmooth bases . The purpose of this paper is to study the unique solvability of generalized solution of the problem.

The ethanol extract of Helicteres hirsuta L., collected in Hon Son village, Kien Hai district, Kien Giang province, was partitioned with solvents with increasing polarity to obtain petroleum ether (PE), dichloromethane (DC), ethyl acetate (EA) and methanol (MeOH) fractions. The cytotoxic activity of these fractions was assessed on Hep-G2 cells (a hepatocellular carcinoma cells). The PE and DC fractions exhibited cytotoxic activities. From the DC extracts, four compounds were isolated: stigmasterol, lupeol, apigenin and tiliroside. The structures of these compounds have been elucidated by spectroscopic methods: 1H-NMR, 13C-NMR, DEPT.

Ten benzimidazole derivatives with various substituents (aza, H, Cl, NO2, CH3) at the C4 and C5 positions on the benzimidazole heterocycles have been successfully synthesized from moderate to excellent yield (41% - 90%). The synthesis made use of a condensation between substituted o-phenylenediamines and benzylamines in the presence of Na2S2O5 as the oxidant. Dimethylsulfoxide (DMSO) proved to be the better solvent than ethanol for this transformation. Reaction time was shortened from 24 hours to 18 hours. 2‑(2‑Chlorophenyl)‑5‑nitro‑1H‑benzimidazole had the best synthetic performance (90%). The structures of these new compounds were confirmed by MS, 1H-NMR and 13C-NMR spectra.

Fifty five isolates of bacteria associated with maize were tested for the production of IAA using Fe-HClO4 and Fe-H2SO4 reagents. The production of IAA in the absence and the presence of 100 mg/L of  trp was in the range of  0.24 to 9.99 and 0.14 to 12.51 mg/L, respectively. There were 16 isolates showing a remarkable decrease in the production of IAA in the presence of trp. Twelve isolates were further assayed for siderophore production on the CAS agar medium according to the method modified by Srivastava et al. (2013) but there was only one of them showing the ability. The length of the changed color edges starting from the borderline between the two media PS and CAS produced by isolate DDN10b changed from 1.30±0.10 cm at 2 DAI to 2.67±0.21 cm at 4 DAI. Effects of 5 potential isolates on plant growth of maize were studied under pots experiments. All isolates demonstrated an increase in shoot length, fresh shoot and root weight, and dry mass of one month old plants compared to the control. The best three were VTN2b (Bacillus subtilis), DDN10b (Burkholderia sp.) and TDB1 (Bacillus sp.) showing effects on dry mass equivalent to 50% NPK treatment or 75% NPK treatment and were suggested for field trials.

Thermoluminescence (TL) spectra are complex curves that do not adhere the normal distribution but follow the first-, second-, general- order kinetics equations and require a software to analyze. This article presents a method of using R software to fit the empirical and the theoretical curves of the thermoluminescence glow peak types. Thank to this method, characteristic parameters of the trap are also defined such as number of peak, trap depth (E), the order of kinetic(b), the frequency factor (s). The samples spending shorter period of storage time (360h) have smaller kinetic parameter values than the samples spending longer period of storage (720h). Thereby, we can find out the characteristics of the samples which can be applied in the detection of irradiated food, age determination of antiques.

A comparative study was conducted to evaluate the apparent digestibility methods of amino acids and nutrients on growing Guinea fowls at 10 weeks of age. The experiment was a completely randomized design with three treatments and five replications. The treatments were total tract, caecetomised, and ileal digestibilities. The results showed that the apparent EE digestibility and nitrogen retention of intact birds were resemble with those of caecetomised birds (p>0.05). However, the apparent digestibility coefficients of CF, NDF and ADF were higher for the intact birds as compaired to those of the caecetomised birds (p0.05). The amino acid digestibility values obtained of the intact birds were significantly higher (p

An experiment was carried out on 540 Hisex Brown laying hens (35 weeks of age) whose design consisted of two factors and 5 replicates. The first factor was Mn (0, 80, 120 ppm) and the second was Zn (0, 40, 60 ppm). Results showed that egg production was highest for the Mn120 treatment (90.62%) and lowest for the control (84.51%) (P

This study was conducted with the aim to isolate bacterial strains capable of antagonism to Colletotrichum sp. causing anthracnose on chilli. From 18 soil samples collected in the rhizosphere of chilli grown in Can Tho, Dong Thap, and Tien Giang province,  341 bacterial strains were preliminary tested for antagonistic action. Results showed that 79 bacterial strains were found having antagonistic action. The antagonistic efficiency of all isolates ranged from 7.78 to 53.34%. Studying the biochemical characteristics of isolates showed that 47 isolates were capable to produce siderophores, 61 to decompose chitin, 55 to decompose cellulose and 68 proteolytic. Six strongest antagonists including CT6, CT10, CT15, CT17, CT21, and TG36 were identified as Bacillus sp. based on Bergey classification system. CT10, the best antagonistic performer, was determined as B. amyloliquefaciens by using both biomolecular (sequencing 16S rDNA region) and conventional methods.

Taichung variety and four mutant populations in M3 generation with 0.2, 0.4, 0.6 and 0.8% concentration of EMS were sown at the Experimental Farm of Can Tho University, in 2015 Summer-Spring season. The genotypic and phenotypic variances, broad sense heritability and genetic advance for plant height at maturity, pod number per plant, 100 seed weight and seed yield per plant were evaluated. The experiment was designed in Randomized Complete Block Design with three replications and spacing 45x20 cm, two plants per hill. Taichung variety without EMS was selected as control. Results revealed that plant height at maturity were shorter than those on Taichung variety at four doses of EMS. Yield and yield components were higher than control. The phenotypic coefficient of variation (PCV) was higher than genotypic coefficient variation (GCV) for all traits. The highest GCV was 36.06% for seed yield per plant at 0.4% EMS. Meanwhile, the highest PCV was 41.21% for seed yield per plant at 0.2% EMS. The control gave lowest GCV (6.44%) and PCV (8.96%) for plant height at maturity. The highest heritability in broad sense gave 85.42% at 0.4% EMS for seed yield per plant. The expected genetic advance was 68.66% at 0.4% EMS for seed yield per plant. The lowest heritability was 32.62% for pod per plant. The lowest genetic advance was 9.55 for plant height at maturity in the control. The values of all the genetic parameters reached maximum at 0.4% EMS.

The genetic diversity and the antibacterial activity of Blumea balsamifera Lindl. was evaluated on 15 plants collected in different places in Mekong Delta (Vinh Long, Can Tho, Soc Trang, Tra Vinh, Dong Thap, Bac Lieu, and Hau Giang). Their leaves were used for analyzing genetic diversity employing RAPD (Random Amplified Polymorphic DNA) markers and testing the antibacterial susceptibilities expressed as minimum inhibitory concentrations (MIC) of eight selected Gram positive and Gram negative strains: Staphylococcus aureus, Streptococcus faecalis, Escherichia coli, Pseudomonas aeruginosa, Salmonella spp., Aeromonas hydrophila, Edwardsiella ictaluri and Edwardsiella tarda by agar dilution method. Results showed that, the polymorphism of 15 Blumea balsamifera is greatly diversed and was divided into 4 groups with the genetic distance from 1.414 to 5.196. All of them demonstrated the efficacy of antibacterial activity. The highest antibacterial potentials were observed on Edwardsiella tarda (MIC=256 µg/ml), and subsequently on Edwardsiella ictaluri (256 µg/ml ≤ MIC ≤ 512 µg/ml, best in group 3) and on Staphylococcus aureus (512 µg/ml ≤ MIC ≤ 1024 µg/ml, most of them with MIC=512 µg/ml). B. balsamifera was found less effective on Pseudomonas aeruginosa and Aeromonas hydrophila (1024 µg/ml ≤ MIC ≤ 2048 µg/ml), Streptococcus faecalis (1024 µg/ml ≤ MIC ≤ 4096 µg/ml), and least effective on Escherichia coli (2048 µg/ml ≤ MIC >4096 µg/ml) and Salmonella spp. (MIC=4096 µg/ml).

Research on application biofloc technology at different stocking densities in nursery of black tiger shrimp postlarvae (PL) was carried out in order to improve growth and survival of black tiger shrimp. The experiment included four density treatments: (i) 1,000 PL/m3, (ii) 2,000 PL/m3, (iii) 3,000 PL/m3 and (iv) 4,000 PL/m3. The treatments were set-up randomly and each treatment was triplicated. Biofloc was set at C:N = 15:1 and rice flour was used to supply the carbohydrate source. Experimental tanks were 100 liters and salinity was maintained at 15 ‰. The initial shrimp length was 1.23 cm (body weight 0.02 g/PL). After 28 days of rearing, shrimp growth in weight was significant difference among treatments (p

Study on the financial performance of offshore pair trawlers was conducted from January to May 2016 in Rach Gia city, Ha Tien town and Kien Luong district of Kien Giang Province. It was interviewed with 32 households operating offshore pair trawlers with main contents such as number of boats, fishing crops, fishing grounds, main exploited species, yield and financial performance. Results showed that offshore pair trawlers of Kien Giang province has about 2.653 boats, accounting for 23.2% of total fishing boats in Kien Giang province. The main vessel has average capacity of 1.072 CV/vessel and average tonnage of 155 tons/vessel. Auxiliary vessel has average capacity of 625 CV/vessel and average tonnage of 103.44 tons/vessel. The average of yield was 2,017 tons/year, in which the ratio of trash fish was 40.3%. The total average cost of a fishing trip was 3,007 million VND and net return was 2,627 million VND/trip, cost benefit ratio was 0.87. No pair trawler fisherman was any losses. Difficulties of offshore pair trawlers were the high initial investment cost, instable consumer product market, number of fishing vessels increased and lack of product preservation techniques.

Post-harvested sea grape (Caulerpa lentillifera) with mechanically vulnerable and contain inorganic, organic impurities as well as microorganisms. These affect adversely the quality of raw material. The purpose of this study was to determine the optimal pre-processing conditions in order to improve the quality of the raw sea grape and help to preserve fresh grapes better. The study results showed that the optimal washing conditions at water volume of 15 liters water/kg sea grape, washing time at 7 minutes/time with 3 washing times and the optimal conditions of culturing sea grape again obtained at density 1/40 kg/liter, 3 days of re-cultivation and dissolved oxygen at 7ppm. With these optimal conditions, the sensory quality and the brightness of sea grapes were highest and the number of microorganism in sea grapes was negligible. Rong nho (Caulerpa lentillifera) sau thu hoạch bị tổn thương cơ học và chứa nhiều tạp chất vô cơ, hữu cơ cũng như vi sinh vật. Điều này ảnh hưởng xấu đến chất lượng nguyên liệu ban đầu của rong nho. Mục đích của nghiên cứu là xác định các điều kiện tối ưu của quá trình sơ chế rong nho sau thu hoạch nhằm nâng cao chất lượng nguyên liệu ban đầu của rong nho, phục vụ cho quá trình bảo quản rong nho tươi sau này. Kết quả nghiên cứu cho thấy, điều kiện tối ưu công đoạn rửa rong nho với lượng nước rửa là 15 lít/kg rong nho, thời gian rửa là 7 phút/lần với 3 lần rửa và các điều kiện tối ưu công đoạn nuôi lại rong nho là mật độ rong 1/40 kg/lít, thời gian nuôi lại 3 ngày và lượng oxy hòa tan 7 ppm. Với điều kiện tối ưu này thu được chất lượng cảm quan, độ sáng của rong nho cao nhất và lượng vi sinh vật còn bám trên rong không đáng kể.

The study was performed to evaluate effect of supplementing B. subtilis and S. parvulus in culture of the white leg shrimp (Litopanaeus vannamei). There were four treatments in triplicates including 1) the control (without supplementing bacteria); 2) supplementing Bacillus subtilis; 3) Streptomyces parvulus and 4) mixture of two these bacteria. All bacteria were added at concentration of 105 CFU/mL (5 days/time), shrimp with mean initial weight of 0.036 g were stocked in the 120 L- tanks at density of 0.5 ind./L. After 60 days, water quality parameters (COD, TAN, NH3 and NO2) indicated that in the supplemental probiotic treatments had better decomposition of organic substances and lower Vibrio density than in the control treatments. Growth rate of shrimp in terms of daily weight gain and daily length gain were highest in treatment 3 (0.118±0.011g/day) and 0.152±0.011 cm/day), and lowest in the control (0.076±0,008g/day) and 0.127±0.012 cm/day). Survival rate of shrimps were in the range of 44.7-64.7% in which the control treatment had a significantly lower value compared with other treatments. These results indicated that supplementation of these bacteria in the culture medium could promote a better decomposition of organic matter, help improve survival and growth rate of shrimp.

This study was carried out to determine the effects of broodstock size on the reproductive efficiency of black apple snail, Pila polita. Experiment was arranged with 3 size classes of broodstocks and was run triplicates per each class: 1) Shell height 30-35mm (SC1); 2) Shell height 40-45 mm (SC2); 3) Shell height 50-55 mm (SC3). Broodstocks were collected from the wild and maintained in 9 composite tanks (0.5m3/tank) at the density of 15 snail couples/tank. After 90 days of culture, broodstock snail at SC3 obtained highest reproduction efficiency (118.79 eggs/individual) and statistically significant difference (p0.05). Results of weight and egg’s diameter, size and weight of newly hatched snails of broodstock in SC3 presented higher than other size classes. Our findings show that snails with shell height in the range 50 - 55 mm are more suitable than 30-35mm or 40-45mm to select as broodstock for artificial seed production.

In recent years, rice-fish systems was adopted in the Mekong Delta. In this study, we use the survey data from 205 rice-fish farmers at Hau Giang, Vinh Long, Dong Thap province and Can Tho City, to analysis the production and profit status of fish culture component in the rice-fish systems as well as investigate the factors affecting fish yield and profit of fish culture. The average net yield of all cultured fish in all provinces and city from 597 to 734 kg/ha/crop while the net return varies from 3.49 to 9.98 million VND/ha/crop. Net fish yield and profit significantly increase with fish stocking density while net fish yield and profit significantly decrease with late in stocking time, increasing culture areas as well as apply three rice crops per year. Late flood, low flooded water, lack of natural food for fish, fish poaching as well as low fish survival rate, lack of contract for fish selling and poor fish culture technologies are the main problems for fish culture. Supplying water in early fish culture period, increasing fish stocking density, increasing natural food by ratoon crop, training of fish culture technologies, group cooperation and marketing outlets are the main suggestions for further improvement of fish culture in the rice-fish systems.

This study aimed to determine the appropriate mineral doses supplementation for the better growth and survival rate of white-leg shrimp larvae and post larvae. The experiment consisted of five treatments i.e. (i) no minerals addition (control); (ii) addition of 20 mL minerals solution/m3; (iii) 40 mL/m3; (iv) 60 mL/m3 and (v) 80 mL/m3. Larvae were cultured in water salinity of 30‰ and thestocking density of 200 larvae/L. Results showed that supplementation of minerals solution at level of 60 mL/m3 revealed the significant better growth (11.99±0.11 mm) compared to other treatments (p0.05). Results suggested that nursing white-leg shrimp with supplementation of mineral solution at level of 60 mL/m3 performed the best growth and survival rate.

This study was conducted to determine the suitable light intensity for the development of white-leg shrimp in intensive bioflocs system. The experiment included five treatments with different light intensities such as (i) natural light condition, (ii) dark condition, (iii) compact light 30w, (iv) compact light 55w and (v) compact light 110w. Shrimps were cultured in bioflocs system (C: N = 15: 1) with 300L of culture volume, 15‰ of salinity and 150 shrimp/m3 of stocking density. The initial shrimp weight and length were 0.54 g and 3.69 cm, respectively. After 90 days of culture, the results showed that water parameters were in suitable ranges for normal development of shrimp. The length of shrimp fluctuated from 11.9 – 12.9 cm and weight was 18 – 21.9 g. Besides, the highest shrimp weight (21.9 g) was found in control treatment but there was no significant difference compared to treatment used compact light 55W (20.5 g). Control and compact light 55w treatments presented the lowest FCR but no significant difference was found among all treatments. Using compact light 55w showed the highest survival rate but there was no significant difference among treatments. Therefore, compact light 55w could be applied to indoor-bioflocs systems which will not impact on shrimp growth and survival rate.

A study to evaluate the status of red tilapia culture in the cage on Tien river, where is located on upstream region of Vinh Long province during period of 2010-2014. GIS and Remote sensing were applied to create the cultural region map, AIC is used to identify the optimal model in multivariable regression equations, probability density function was applied to idensity effective economic of culture during various years.  Results found that there are increasing in both of area of cultural region and volume of the cages among the communes with various levels, farmers often stocked 1-2 crops/year, average surval rate of fish was about 65%, and yield was 23-62 kg/m3/crop. The yield had related to density stocking and survival rate. This cultural type had high cost and depended on market demand and environment. It was over 50% of fish farmers was lost in 2012, because oversupply in market, it created low price of marketable size fish, but it was temporal stage. The issue is now overcome throught market development, and fish farmers almost has net profit from 20-250 thousand VND/m3/crop from 2010 to 2014. Red tilapia is developing and it is corresponding with fisheries section.

The study was to determine some feeding behaviour characteristics of Soldier river barb, Cylocheilichthys enoplos from fry to fingerling. The study was conducted in earthen pond having size of 10×20 (m) and 1 m of water depth. Two days old larvae was nursed at density of 200 fish/m2 for a period of 30 days. Phytoplankton, zooplankton and fish samples were collected at day 2,3,4,5,6,7,9,11,16,21,26 and 31 day-old post-hatching for analyzing of planktonic composition and quantity; and feeding behaviour of C. enoplos fry. The results represented that C. enoplos fry start first feeding at 2 day-olds post-hatching and fed mainly on Nauplius. The relative length of the gut (RLG) fluctuate from 0.742 – 0.827. Mouth size of fish was in range of 0.23 – 1.19 mm. Rotifera (Brachionus) and Nauplius were selected on the 5th and 6th by larvae. From 9th onwards Cladocera (Moina) and Copepoda (Mesocyclops) were chosen.  There was no selected phytoplankton for feeding. The experiment showed that C. enoplos was the zooplanktonic feeder from fry to fingerling stage (30-days old).

The aims of this study are to examine the positive effects of polysaccharide extracted from S. microcystum on growth performance and survival of the catfish Pangasianodon hypophthalmus via dietary administration. For the growth performance trial, fifty experimental fish (1.0-2.0 g) were held in 500L- composite tanks, and then fed relative diets to satiation over 60 days. Four dietary treatments were tested and each with three replicates. Fish were fed the diet without polysaccharide extract served as control group (0%) and other different levels of polysaccharide extract at 0.2, 0.4, and 0.6%. Growth performance indices as growth rate, weight gain, feed efficiency, survival rate, and total harvested weight were evaluated at the end of experiment. Some crucial water quality parameters as temperature, pH, dissolved oxygen, NH3 and N-NO2- were also weekly tested. The results indicated that striped catfish P. hypophthalmus that being fed the diets incorporating with polysaccharide extracted from brown seaweed S. micorcystum at 0.4% had significantly higher growth performance than that of control after 60 days (p0.05). Therefore, it is concluded that polysaccharide extracted from brown seaweed S. microcystum could be considered as a growth-promoting factor in the striped catfish P. hypophthalmus culture.