scholarly journals Effects of carbon to nitrogen ratio (C:N) on water quality and growth performance of Litopenaeus vannamei (Boone, 1931) in the biofloc system with a salinity of 5%

2021 ◽  
Author(s):  
Hai-Hong Huang
Keyword(s):  
Water Quality ◽  
Growth Performance ◽  
Litopenaeus Vannamei ◽  
Survival Rates ◽  
The Other ◽  
Culture Experiment ◽  
Carbon To Nitrogen Ratio ◽  
Low Salinity ◽  
Salinity Condition ◽  
Nitrogen Ratio

This study aimed to investigate the effects of carbon to nitrogen ratio (C:N) on the water quality and shrimp growth performance during the grow-out culture of Litopenaeus vannamei in the biofloc system under a low salinity condition. Three biofloc treatments with an C:N (contained in the inputted feed and carbon source with the assumption that 75% of the feed nitrogen is excreted) of 8:1 (CN8), 16:1 (CN16) and 24:1 (CN24), respectively, were designed to stocking shrimp juveniles (≈ 0.8 g) at a density of 270 individuals m-3, for a 63-days culture experiment at a salinity of about 5‰. Results showed that in CN8 treatment, the levels of pH (6.9±0.1), carbonate alkalinity (104.0±2.8mg L-1 CaCO3), biofloc volume (4.8±0.9mL L-1) and TSS (327.4±24.4mg L-1) were significantly lower than those in the other two treatments (≥7.6±0.3, ≥157.6±21.6mg L-1 CaCO3, ≥24.1±3.7mL L-1 and ≥508.1±32.3mg L-1, P<0.05); whereas the levels of TAN (7.1±0.9mg L-1), nitrite (14.0±3.6mg L-1) and nitrate (77.0±5.0mg L-1) were significantly higher than those in the other treatments (≤2.0±0.6mg L-1, ≤4.9±3.1mg L-1 and ≤14.7±5.9mg L-1, P<0.05). The zootechnical parameters of shrimp were not significantly different between three treatments (P>0.05), except that the survival rates in CN16 treatment (96.8±2.0%) and CN24 treatment (93.7±4.2%) were significantly higher than that of CN8 treatment (81.5±6.4%, P<0.05). The results indicated that an inputted C:N higher than 16:1 was suitable for the biofloc system with a low salinity of 5‰, with an optimal inferred C:N range of 18.5-21.0:1 for water quality and growth performance.

scholarly journals ẢNH HƯỞNG CỦA MẬT ĐỘ VI KHUẨN Streptomyces DH3.4 LÊN ENZYME TIÊU HÓA VÀ TĂNG TRƯỞNG CỦA TÔM THẺ CHÂN TRẮNG (Litopenaeus vannamei)

2021 ◽  
Vol 5 (3) ◽  
pp. 2710-2719
Author(s):  
Vũ Hùng Hải ◽  
Phạm Thị Tuyết Ngân ◽  
Vũ Ngọc Út ◽  
Huỳnh Trường Giang
Keyword(s):  
Water Quality ◽  
Weight Gain ◽  
Growth Performance ◽  
Digestive Tract ◽  
Litopenaeus Vannamei ◽  
Digestive Enzyme ◽  
Survival Rates ◽  
Total Alkalinity ◽  
Daily Weight Gain ◽  
Control Group

Nghiên cứu được thực hiện nhằm đánh giá ảnh hưởng của việc bổ sung vi khuẩn Streptomyces DH3.4 lên chất lượng nước, vi khuẩn đường ruột, enzyme tiêu hóa và tăng trưởng của tôm thẻ chân trắng (Litopenaeus vannamei). Tôm thẻ chân trắng với trọng lượng trung bình 0,48 ± 0,01 g được chọn để bố trí thí nghiệm với 4 nghiệm thức, mỗi nghiệm thức với 3 lần lặp lại bao gồm (i) Tôm được cho ăn thức ăn không bổ sung khuẩn (Đối chứng) và thức ăn có bổ sung vi khuẩn Streptomyces DH3.4 tương ứng với 3 mật độ (ii) 106, (iii) 107 và (iv) 108 CFU/kg trong 63 ngày. Kết quả cho thấy các thông số chất lượng nước bao gồm nhiệt độ, pH, DO, COD, TSS, độ kiềm, TAN và N-NO2- ở các nghiệm thức bổ sung khuẩn và đối chứng không có sự chênh lệch đáng kể. Mật độ vi khuẩn Streptomyces sp. trong ruột tôm ở nhóm bổ sung vi khuẩn cao hơn có ý nghĩa so với đối chứng. Nghiệm thức bổ sung vi khuẩn Streptomyces DH3.4 ở mật độ 107 và 108 CFU/kg giúp giảm đáng kể mật độ tổng khuẩn Vibrio sp. trong ruột tôm. Các enzyme tiêu hóa như α-amylase, β-galactosidase, protease và Leu-aminopeptidase ở nhóm bổ sung vi khuẩn Streptomyces DH3.4 đạt hoạt tính cao nhất ở cả hai nhóm bổ sung mật độ 107 và 108 CFU/kg.  Tăng trưởng về khối lượng (WG), tốc độ tăng trưởng tương đối (DWG) và tốc độ tăng trưởng tuyệt đối (SRG) về khối lượng khác biệt không đáng kể giữa các nghiệm thức. Tuy nhiên, tỉ lệ sống, sinh khối của tôm và chỉ số FCR ở các nghiệm thức bổ sung Streptomyces DH3.4 được cải thiện đáng kể, đặc biệt là nghiệm thức bổ sung vi khuẩn Streptomyces DH3.4 ở mật độ 107 CFU/kg. ABSTRACT The present study aimed to evaluate the effect of dietary supplementation of Streptomyces DH3.4 on water quality, intestinal bacteria, digestive enzyme activities and growth performance of whiteleg shrimp (Litopenaeus vannamei). Shrimp with initial weight of 0.48 ± 0.01g were designed in 4 treatments with 3 replicates including (i) Shrimp fed a basic diet without bacteria supplementation (control group) and 3 Streptomyces DH3.4 supplementation diets at dose of (ii) 106, (iii) 107 and (iv) 108 CFU/kg for 63 days. The results showed that the water quality parameters including temperature, pH, DO, COD, TSS, total alkalinity, TAN and N-NO2- were not significantly different among treatments. Streptomyces counts in the digestive tract of shrimp fed diets containing Streptomyces DH3.4 were significantly higher than the control. Furthermore, supplementation of 107 and 108 CFU/kg decreased considerably total Vibrio counts in the shrimp’s digestive tract. The digestive enzymes such as α-amylase, β-galactosidase, protease and Leu-aminopeptidase were improved and reached the highest activities in Streptomyces DH3.4 supplementation diet treatments of 107 and 108 CFU/kg. Growth performance parameters regarding weight gain (WG), daily weight gain (DWG) and specific growth rate (SRG) were not significantly different among treatments. However, survival rates, shrimp biomass and FCR in diets containing Streptomyces DH3.4 were improved significantly, especially in 107 CFU/kg treatment.

Effects of microbubble aeration on water quality and growth performance of Litopenaeus vannamei in biofloc system

2021 ◽  
Vol 93 ◽  
pp. 102159
Author(s):  
Yan Shin Lim ◽  
P. Ganesan ◽  
M. Varman ◽  
F.A. Hamad ◽  
Sivakumar Krishnasamy
Keyword(s):  
Water Quality ◽  
Growth Performance ◽  
Litopenaeus Vannamei

Effects of low salinity exposure on immunological, physiological and growth performance in Litopenaeus vannamei

2019 ◽  
Vol 50 (3) ◽  
pp. 944-950 ◽  
Author(s):  
Héctor M. Esparza-Leal ◽  
Jesús T. Ponce-Palafox ◽  
Carlos M. Cervantes-Cervantes ◽  
Wenceslao Valenzuela-Quiñónez ◽  
Antonio Luna-González ◽  
...  
Keyword(s):  
Growth Performance ◽  
Litopenaeus Vannamei ◽  
Low Salinity

WATER QUALITY IN AN INTEGRATED CULTURE OF WHITE SHRIMP (Litopenaeus vannamei)-TOMATO (Lycopersicon esculentum) USING LOW SALINITY GROUNDWATER IN SONORA, MEXICO

2013 ◽  
Vol 50 (2) ◽  
pp. 306-319 ◽  
Author(s):  
M. MARTIN MARISCAL-LAGARDA ◽  
FEDERICO PÁEZ-OSUNA ◽  
JOSÉ LUIS ESQUER-MÉNDEZ ◽  
ILDELFONSO GUERRERO-MONROY ◽  
ALONSO-ROMO DEL VIVAR ◽  
...  
Keyword(s):  
Water Quality ◽  
Lycopersicon Esculentum ◽  
Water Consumption ◽  
Litopenaeus Vannamei ◽  
Culture System ◽  
White Shrimp ◽  
Semiarid Region ◽  
Total N ◽  
Tomato Plants ◽  
Low Salinity

SUMMARYThe aim of this work was to test the performance of a shrimp-tomato culture system (STCS) in an arid-semiarid region (Sonora, Mexico) and to evaluate the water quality variables and phytoplankton variation of shrimp effluent and that water returning from the tomato module culture. The field study was conducted using groundwater and consisted of three circular tanks that were used for shrimp (Litopenaeus vannamei) farming and were coupled to one culture module of tomato plants (Lycopersicon esculentum). The shrimp effluent was used to irrigate the tomato plants. The yield was 11.1±0.2 kg shrimp per tank (3.9±2.0 ton ha−1) and 33.3 kg tomatoes per 45 plants (36.1±2.3 ton ha−1). During the culture, the concentrations of nutrients were (mg L−1): total N-ammonia, <0.001–0.848; N-nitrite, <0.001–1.45; N-nitrate, 5.2–172.2; dissolved reactive-P, <0.005–0.343. A total of 35 taxa belonging to three different algal classes were observed: Chlorophyta (87 to 98%), Bacilliariophyta (2 to 9%) and Cyanophyta (0–3%). This STCS allowed us to harvest the equivalent of 3.9 ton ha−1 of shrimp and 36.3 ton ha−1 of tomatoes, with a water consumption of 2.1 m3 per kg harvested of both products.

scholarly journals Pengaruh Potassium Media terhadap Pertumbuhan Mutlak, Osmolaritas Hemolymp dan Energi Basal dari Pascalarva Vaname (Litopenaeus vannamei, Boone)

2016 ◽  
Vol 4 (1) ◽  
Author(s):  
Erly Kaligis
Keyword(s):  
Litopenaeus Vannamei ◽  
Sea Water ◽  
The Other ◽  
Distilled Water ◽  
Low Salinity ◽  
Low Salinity Water ◽  
Absolute Growth ◽  
Salinity Water ◽  
Growth Trial ◽  
Different Levels

Absolute Growth, hemolymp  osmolality, oxygen consumption, and basal energy of  Litopenaeus vannamei postlarvae were investigated. After post larval stage, PL-20, the postlarvae were acclimatized from sea water (25 ppt) to low salinity  water (2 ppt) over 96 h. Treatments consisted of different concentration of K+added to distilled water. Four different levels of K+ (0, 30, 60, and 90 ppm) were utilized. Ten shrimp were placed in triplicate 40-L glasses aquarium.  Results from the 42-day K+ growth trial indicated significant differences (P< 0.05) in absolute growth, hemolymp osmolality,  oxygen comsumption, and  basal energy. The values in treatment A was significantly higher than than those under the other four treatments. The results suggest treatment C were the optimum K+ level for culture  vaname postlarvae in low salinity water. Keywords :  Litopenaeus vannamei, oxygen comsumption, hemolymp

scholarly journals Influence of stocking density on water quality and growth performance of white leg shrimp (Litopenaeus vannamei) reared in fiberglass tanks, without water exchange

2019 ◽  
Vol 18 (06) ◽  
pp. 14-22
Author(s):  
Tu P. C. Nguyen
Keyword(s):  
Water Quality ◽  
Survival Rate ◽  
Growth Performance ◽  
Linear Relationship ◽  
Litopenaeus Vannamei ◽  
Water Exchange ◽  
Stocking Density ◽  
Quality Parameters ◽  
Final Weight ◽  
Ad Libitum

The present study evaluated the effects of stocking density on water quality parameters, growth performance and survival rate of white leg shrimp Litopenaeus vannamei, reared in fiberglass tanks, without water exchange. Three stocking densities (50, 100 and 200 shrimp/m2) were tested. Each treatment consisted of three replicates fiberglass tanks (500 L). The shrimp were fed ad libitum four times per day with a commercial pellet (40-42% protein). After an 8-week trial, concentrations of nutrients in the culture tanks showed an increasing linear relationship with increasing stocking density. The growth performance of shrimp in low stocking densities was significantly greater than that in high stocking densities. The results from this study demonstrate that with increasing the stocking density the production of shrimp increased but in a low final weight and survival compared to low stocking density.

scholarly journals Effect of Stocking Density on Growth Performance and the Survival of Golden Mahseer, Tor putitora (Hamilton) Fry

2021 ◽  
pp. 47-54
Author(s):  
Md. Golam Sajed Riar ◽  
Nur- A Raushon ◽  
Sumit Kumer Paul
Keyword(s):  
Water Quality ◽  
Growth Performance ◽  
Crude Protein ◽  
Stocking Density ◽  
Experimental Period ◽  
Quality Parameters ◽  
The Other ◽  
Water Quality Parameters ◽  
Daily Weight Gain ◽  
Tor Putitora

Growth performance and survival of Tor putitora fry under different stocking densities were evaluated fry rearing system. The experimental period was 10 weeks from 31 December to 10 March 2019. The experiment was carried out in nine earthen ponds of 0.04 ha each under three treatments with three replications.  Thirty days old fry were stocked at the rate of 1.0X105/ha was designated as treatment- 1 (T1), 1.5X105/ha` as treatment- 2 (T2) and 2.0X105/ha as treatment- 3 (T3), respectively. Fry were fed with commercially available nursery feed containing 32% crude protein. It was observed that, lower stocking density showed highest daily weight gain in T1 (growth 0.066 ± 0.006 g/day) compared with higher stocking density in T2 (growth 0.044 ± 0.004 g/day) and T3 (growth 0.024 ± 0.003 g/day), respectively. It is also noticed that, the lower stocking showed the highest survival rate (79.66 ± 4.34 %) than the other two treatments (66.97±3.67 and 54.67± 3.12 %). The values of different water quality parameters were within the optimum ranges for the rearing of carp fry. Water quality parameters did not show significant variations in the experimental ponds under different stocking densities. Among these three stocking densities lower stocking density (T1) showed the best result compare with the other two higher stocking densities.

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