Ngo Thi Thu Thao 002078 (original) (raw)
Papers by Ngo Thi Thu Thao 002078
Egyptian Journal of Aquatic Biology and Fisheries, Jul 1, 2023
Tạp chí Khoa học Trường Đại học Cần Thơ, 2020
This study is aimed to assess the useability of fermented green seaweed Enteromorpha intestinalis... more This study is aimed to assess the useability of fermented green seaweed Enteromorpha intestinalis (FGS) with minerals supplementation as feed to culture Artemia biomass. The first experiment was conducted to determine the suitable mineral concentration to add into FGS for Artemia culture. Different concentrations of mineral (0, 1, 3 and 5 g) were added to 1 kg of FGS with 3 replications per each and used to culture Artemia in 14 days. The findings showed that Artemia fed on FGS adding mineral at 3.0 g/kg obtained the highest length and survival rate. In the second experiment, Artemia was cultured in 21 days with 4 feeding treatments corresponding to the replacement rate of FGS at 0%, 25%, 50% and 100% of the industrial diet (ID), each treatment was repeated 3 times. The results showed that survival and Artemia biomass was highest in the 100% ID (85.67 ± 1.61% and 3.34 ± 0.28g). Artemia length was highest in 25% FGS replacement (7.60 ± 0.84mm) on day 14 of culture period. The fecundity of Artemia was highest in the 100% ID (84.43 ± 6.98 eggs/female) and lowest in the 100% FGS treatment (41.07 ± 6.73 eggs/female). The survival, growth and fecundity of Artemia during the experiment was always highest in 100% ID and 25% FGS replacement. The results showed the ability to replace fermented seaweed powder as food for Artemia franciscana with 25% replacement rate.
Can Tho University Journal of Science, 2021
Tomlinia frausseni Thach, 2014 - ốc Cà na, loài có giá trị làm thực phẩm, phân bố chủ yếu ở khu v... more Tomlinia frausseni Thach, 2014 - ốc Cà na, loài có giá trị làm thực phẩm, phân bố chủ yếu ở khu vực vùng ven biển Đồng bằng sông Cửu Long. Nghiên cứu hiện trạng khai thác ốc Cà na khu vực biển ven bờ tỉnh Trà Vinh được thực hiện từ tháng 3 đến tháng 8 năm 2018 thông qua phỏng vấn trực tiếp 42 ngư dân về khía cạnh kỹ thuật, khía cạnh tài chính và những khó khăn, thuận lợi. Nguồn lợi ốc Cà na được ước tính dựa trên phương pháp Sản lượng-Cường lực khai thác (Catch–Effort methods) trong khoảng thời gian từ 12 tháng 5 đến 19 tháng 9 năm 2019. Kết quả cho thấy nghề khai thác ốc bắt đầu từ năm 2011, mùa vụ khai thác từ tháng 3 đến tháng 10 âm lịch, và khu vực khai thác chính tại vùng biển ven bờ. Phương thức khai thác chủ yếu là sử dụng bẫy lồng với công suất tàu trung bình 31,36 ± 2,23 CV và trọng tải trung bình 2,85 ± 0,13 tấn/tàu. Sản lượng khai thác trung bình năm đạt 6.432,74 ± 207,98 kg. Tổng chi phí trung bình cho một chuyến đi biển 1,33 ± 0,03 triệu đồng và tổng doanh thu 1,87 ± 0...
Can Tho University Journal of Science, 2019
Can Tho University Journal of Science, 2016
Communications in agricultural and applied biological sciences, 2013
This study was conducted to evaluate the effects of different glucose concentration on the surviv... more This study was conducted to evaluate the effects of different glucose concentration on the survival and growth rate of juvenile hard clam, Meretrix lyrata. Juvenile clams M lyrata were cultured with algae from a tilapia-greenwater system and different concentrations of glucose (0, 35, and 70microg.l-1). After 70 days of culture, highest survival rate was obtained with 35microg.l-1 glucose supplementation (99.5-100%). However, in highest concentration of glucose, weight gain and shell length of clams reached highest values (p<0.05). Our findings showed that supplementation of probiotics and suitable glucose concentration in the nursery period could increase survival and growth rate of clams.
International Journal of Scientific and Research Publications (IJSRP), 2018
The present study investigated seasonal changes in gonad development and proximate compositions o... more The present study investigated seasonal changes in gonad development and proximate compositions of the mangrove snail, Cerithidea obtusa in the mangrove forest of Ca Mau province, Mekong Delta of Vietnam. Our findings showed that gametogenesis of C. obtusa occurred year around, however, the major spawning period lasted from September to November. The highest spawning synchrony was observed in November with 43% collected individuals in spawning stage. The results also showed that in mangrove snails, proteins are the major component (~60%) followed by carbohydrates (~25%) and then lipids (~5%). Proteins could be the major energy resource to support growth and reproductive cycle of this species. Results from this study provide detail information on the biology of mangrove snails and it could be useful for resource management, bioconservation and sustainable aquaculture in mangrove forests of Vietnam.
Can Tho University Journal of Science, 2019
The ability to produce single cell detritus (SCD) from different seaweed species, red seaweed, Gr... more The ability to produce single cell detritus (SCD) from different seaweed species, red seaweed, Gracillaria tenuistipitata and green seaweed, Enteromorpha sp. was determined, and the effects of selected SCD diet on survival rate, growth performance and reproductive characteristics of Artemia franciscana were assessed under laboratory conditions. Experiment 1 included 8 treatments with red and green seaweeds, combined with yeast fermentation at different densities (0, 10 4 , 10 5 , 10 6 cells/mL). The results showed that the density of SCD reached highest at day 7 in the treatments added 10 6 yeast cells/mL (88.480±2.769×10 6 and 100.752±2.687×10 6 cells/mL of red and green seaweeds, respectively). Although the density of SCD was highest at 10 6 yeast cells/mL, the yeast density and NH 4 + concentration in green seaweed fermentation were high (5-10 mg/L). Thus, the treatment of red seaweed and 10 5 yeast cells/mL obtained the suitable ability to harvest at day 7 and preserve SCD for feeding Artemia. In experiment 2, Artemia were fed with 5 different diets, and each diet has three replications. Commercial feed No. 0 (for shrimp postlarvae) was the control, and 4 diets in which the shrimp feed was replaced by SCD with proportion of 100, 75, 50 and 25%. Results showed that diet with 50% shrimp feed and 50% SCD showed the high survival rate and good growth performance, as well as positive effects on the reproductive characteristics of Artemia franciscana.
Vietnam Journal of Agricultural Sciences, 2019
The present study was conducted to evaluate the effects of different dietary calcium levels on th... more The present study was conducted to evaluate the effects of different dietary calcium levels on the growth and survival rate of black apple snails (Pila polita) in the grow-out period. There were 3 replicates for each treatment and the snails were fed with five calcium levels (% dry matter) in diet as follows: 1% (Ca1), 3% (Ca3), 5% (Ca5), 7% (Ca7), and 9% (Ca9). Two-month-old juveniles with an average initial body weight of 2.13g, shell height of 21.71mm, and shell width of 16.35mm were reared in tarpaulin tanks (1 × 1 × 1m; 40cm water depth) at the density of 100 individuals per tank. After 4 months of the rearing period, the average body weight, shell height, and shell width of the snails reached the highest values in the Ca5 treatment (28.43 g, 54.97 mm, and 40.09mm, respectively) and these values were significantly different compared to the remaining calcium contents (Ca1, Ca3, Ca7, and Ca9). The survival rate of the snails in Ca3 (75.7%) was higher than in Ca1 and Ca7 (74.7%), ...
International Journal of Scientific and Research Publications (IJSRP), 2018
The present study was conducted to evaluate the effects of different protein levels in diet on th... more The present study was conducted to evaluate the effects of different protein levels in diet on the growth and survival rate of black apple snail (Pila polita) in grow-out period. There were 3 replicates in each treatment and snails were fed with protein levels at 15% (P15); 20 (P20); 25 (P25); 30 (P30); 35 (P35). Two month old juveniles with initial body weight, shell height and shell width of (2.52 g; 23.26 mm and 16.42 mm) were reared in the tarpaulin tanks (1 × 1 × 1 m; 40 cm water depth) at the density of 100 ind./tank. After 4 months of rearing period, the average body weight, shell height and shell width of the snail reached highest value in P20 (28.36 g; 54.59 mm; 39.74 mm, respectively) and that was significant difference (p<0.05) compared to the remaining protein contents (P15, P25, P30, P35). The survival rate of snails in P25 (75.3%) was higher than in P15 (74.7%), P20 (74.3%), P30 (73.3%) and P35 (71.7%). However, the survival rate was not significant difference among treatments (p>0.05). Snails in P20 obtained the highest productivity (2.79 kg/m 2) and it was significant difference (p<0.05) from P15 (2.52 kg/m 2), P25 (2.57 kg/m 2), P30 (2.48 kg/m 2) and P35 (2.31 kg/m 2). The results of this study showed that the growth rate and productivity of black apple snail were highest when feeding diet contained 20% protein. The requirement of protein for the black apple snail in grow-out period was 22.12%.
Tạp chí Khoa học Trường Đại học Cần Thơ, 2020
Egyptian Journal of Aquatic Biology and Fisheries, Jul 1, 2023
Tạp chí Khoa học Trường Đại học Cần Thơ, 2020
This study is aimed to assess the useability of fermented green seaweed Enteromorpha intestinalis... more This study is aimed to assess the useability of fermented green seaweed Enteromorpha intestinalis (FGS) with minerals supplementation as feed to culture Artemia biomass. The first experiment was conducted to determine the suitable mineral concentration to add into FGS for Artemia culture. Different concentrations of mineral (0, 1, 3 and 5 g) were added to 1 kg of FGS with 3 replications per each and used to culture Artemia in 14 days. The findings showed that Artemia fed on FGS adding mineral at 3.0 g/kg obtained the highest length and survival rate. In the second experiment, Artemia was cultured in 21 days with 4 feeding treatments corresponding to the replacement rate of FGS at 0%, 25%, 50% and 100% of the industrial diet (ID), each treatment was repeated 3 times. The results showed that survival and Artemia biomass was highest in the 100% ID (85.67 ± 1.61% and 3.34 ± 0.28g). Artemia length was highest in 25% FGS replacement (7.60 ± 0.84mm) on day 14 of culture period. The fecundity of Artemia was highest in the 100% ID (84.43 ± 6.98 eggs/female) and lowest in the 100% FGS treatment (41.07 ± 6.73 eggs/female). The survival, growth and fecundity of Artemia during the experiment was always highest in 100% ID and 25% FGS replacement. The results showed the ability to replace fermented seaweed powder as food for Artemia franciscana with 25% replacement rate.
Can Tho University Journal of Science, 2021
Tomlinia frausseni Thach, 2014 - ốc Cà na, loài có giá trị làm thực phẩm, phân bố chủ yếu ở khu v... more Tomlinia frausseni Thach, 2014 - ốc Cà na, loài có giá trị làm thực phẩm, phân bố chủ yếu ở khu vực vùng ven biển Đồng bằng sông Cửu Long. Nghiên cứu hiện trạng khai thác ốc Cà na khu vực biển ven bờ tỉnh Trà Vinh được thực hiện từ tháng 3 đến tháng 8 năm 2018 thông qua phỏng vấn trực tiếp 42 ngư dân về khía cạnh kỹ thuật, khía cạnh tài chính và những khó khăn, thuận lợi. Nguồn lợi ốc Cà na được ước tính dựa trên phương pháp Sản lượng-Cường lực khai thác (Catch–Effort methods) trong khoảng thời gian từ 12 tháng 5 đến 19 tháng 9 năm 2019. Kết quả cho thấy nghề khai thác ốc bắt đầu từ năm 2011, mùa vụ khai thác từ tháng 3 đến tháng 10 âm lịch, và khu vực khai thác chính tại vùng biển ven bờ. Phương thức khai thác chủ yếu là sử dụng bẫy lồng với công suất tàu trung bình 31,36 ± 2,23 CV và trọng tải trung bình 2,85 ± 0,13 tấn/tàu. Sản lượng khai thác trung bình năm đạt 6.432,74 ± 207,98 kg. Tổng chi phí trung bình cho một chuyến đi biển 1,33 ± 0,03 triệu đồng và tổng doanh thu 1,87 ± 0...
Can Tho University Journal of Science, 2019
Can Tho University Journal of Science, 2016
Communications in agricultural and applied biological sciences, 2013
This study was conducted to evaluate the effects of different glucose concentration on the surviv... more This study was conducted to evaluate the effects of different glucose concentration on the survival and growth rate of juvenile hard clam, Meretrix lyrata. Juvenile clams M lyrata were cultured with algae from a tilapia-greenwater system and different concentrations of glucose (0, 35, and 70microg.l-1). After 70 days of culture, highest survival rate was obtained with 35microg.l-1 glucose supplementation (99.5-100%). However, in highest concentration of glucose, weight gain and shell length of clams reached highest values (p<0.05). Our findings showed that supplementation of probiotics and suitable glucose concentration in the nursery period could increase survival and growth rate of clams.
International Journal of Scientific and Research Publications (IJSRP), 2018
The present study investigated seasonal changes in gonad development and proximate compositions o... more The present study investigated seasonal changes in gonad development and proximate compositions of the mangrove snail, Cerithidea obtusa in the mangrove forest of Ca Mau province, Mekong Delta of Vietnam. Our findings showed that gametogenesis of C. obtusa occurred year around, however, the major spawning period lasted from September to November. The highest spawning synchrony was observed in November with 43% collected individuals in spawning stage. The results also showed that in mangrove snails, proteins are the major component (~60%) followed by carbohydrates (~25%) and then lipids (~5%). Proteins could be the major energy resource to support growth and reproductive cycle of this species. Results from this study provide detail information on the biology of mangrove snails and it could be useful for resource management, bioconservation and sustainable aquaculture in mangrove forests of Vietnam.
Can Tho University Journal of Science, 2019
The ability to produce single cell detritus (SCD) from different seaweed species, red seaweed, Gr... more The ability to produce single cell detritus (SCD) from different seaweed species, red seaweed, Gracillaria tenuistipitata and green seaweed, Enteromorpha sp. was determined, and the effects of selected SCD diet on survival rate, growth performance and reproductive characteristics of Artemia franciscana were assessed under laboratory conditions. Experiment 1 included 8 treatments with red and green seaweeds, combined with yeast fermentation at different densities (0, 10 4 , 10 5 , 10 6 cells/mL). The results showed that the density of SCD reached highest at day 7 in the treatments added 10 6 yeast cells/mL (88.480±2.769×10 6 and 100.752±2.687×10 6 cells/mL of red and green seaweeds, respectively). Although the density of SCD was highest at 10 6 yeast cells/mL, the yeast density and NH 4 + concentration in green seaweed fermentation were high (5-10 mg/L). Thus, the treatment of red seaweed and 10 5 yeast cells/mL obtained the suitable ability to harvest at day 7 and preserve SCD for feeding Artemia. In experiment 2, Artemia were fed with 5 different diets, and each diet has three replications. Commercial feed No. 0 (for shrimp postlarvae) was the control, and 4 diets in which the shrimp feed was replaced by SCD with proportion of 100, 75, 50 and 25%. Results showed that diet with 50% shrimp feed and 50% SCD showed the high survival rate and good growth performance, as well as positive effects on the reproductive characteristics of Artemia franciscana.
Vietnam Journal of Agricultural Sciences, 2019
The present study was conducted to evaluate the effects of different dietary calcium levels on th... more The present study was conducted to evaluate the effects of different dietary calcium levels on the growth and survival rate of black apple snails (Pila polita) in the grow-out period. There were 3 replicates for each treatment and the snails were fed with five calcium levels (% dry matter) in diet as follows: 1% (Ca1), 3% (Ca3), 5% (Ca5), 7% (Ca7), and 9% (Ca9). Two-month-old juveniles with an average initial body weight of 2.13g, shell height of 21.71mm, and shell width of 16.35mm were reared in tarpaulin tanks (1 × 1 × 1m; 40cm water depth) at the density of 100 individuals per tank. After 4 months of the rearing period, the average body weight, shell height, and shell width of the snails reached the highest values in the Ca5 treatment (28.43 g, 54.97 mm, and 40.09mm, respectively) and these values were significantly different compared to the remaining calcium contents (Ca1, Ca3, Ca7, and Ca9). The survival rate of the snails in Ca3 (75.7%) was higher than in Ca1 and Ca7 (74.7%), ...
International Journal of Scientific and Research Publications (IJSRP), 2018
The present study was conducted to evaluate the effects of different protein levels in diet on th... more The present study was conducted to evaluate the effects of different protein levels in diet on the growth and survival rate of black apple snail (Pila polita) in grow-out period. There were 3 replicates in each treatment and snails were fed with protein levels at 15% (P15); 20 (P20); 25 (P25); 30 (P30); 35 (P35). Two month old juveniles with initial body weight, shell height and shell width of (2.52 g; 23.26 mm and 16.42 mm) were reared in the tarpaulin tanks (1 × 1 × 1 m; 40 cm water depth) at the density of 100 ind./tank. After 4 months of rearing period, the average body weight, shell height and shell width of the snail reached highest value in P20 (28.36 g; 54.59 mm; 39.74 mm, respectively) and that was significant difference (p<0.05) compared to the remaining protein contents (P15, P25, P30, P35). The survival rate of snails in P25 (75.3%) was higher than in P15 (74.7%), P20 (74.3%), P30 (73.3%) and P35 (71.7%). However, the survival rate was not significant difference among treatments (p>0.05). Snails in P20 obtained the highest productivity (2.79 kg/m 2) and it was significant difference (p<0.05) from P15 (2.52 kg/m 2), P25 (2.57 kg/m 2), P30 (2.48 kg/m 2) and P35 (2.31 kg/m 2). The results of this study showed that the growth rate and productivity of black apple snail were highest when feeding diet contained 20% protein. The requirement of protein for the black apple snail in grow-out period was 22.12%.
Tạp chí Khoa học Trường Đại học Cần Thơ, 2020