scholarly journals Nile tilapia fingerling cultivated in a low-salinity biofloc system at different stocking densities

2019 ◽  
Vol 16 (4) ◽  
pp. e0612 ◽  
Author(s):  
Priscilla C. M. Lima ◽  
Jéssika L. Abreu ◽  
Allyne E. M. Silva ◽  
William Severi ◽  
Alfredo O. Galvez ◽  
...  
Keyword(s):  
Water Quality ◽  
Water Consumption ◽  
Nile Tilapia ◽  
Stocking Density ◽  
Experimental Period ◽  
Low Salinity ◽  
Final Weight ◽  
Negative Effect ◽  
Black Plastic ◽  
Formulated Feed

A 42-day trial was conducted to evaluate the effects of a low-salinity biofloc system with different stocking densities on water quality and zootechnical performance of Nile tilapia fingerlings (10 g/L). Four treatments were tested at different densities: 500 fish/m³, 750 fish/m³, 1,000 fish/m³ and 1,250 fish/m³, all in triplicate. Fingerlings of Oreochromis niloticus (initial mean weight of 1.17 ± 0.05 g) were stocked in twelve experimental black-plastic tanks (40 L) with no water exchange during the experimental period. Molasses was added daily to the system at 30% of the amount of feed, and fish were given four daily rations of a formulated feed composed of 36% crude protein and 9% lipids. Water quality variables (dissolved oxygen, pH, salinity, TAN, NO2, NO3 and PO43) did not demonstrate significant differences between the treatments. However, significant influences (α ≤ 0.05) of the stocking densities were observed for total suspended solids, settleable solids, final weight, yield, and protein efficiency ratio. The results showed survival over 96%, final weight values between 12 and 18 g, yield between 9.49 and 15.27 kg/m3, water consumption of 52 to 101 L/kg fish, and total time of settling chambers between 238 and 305 h/kg fish. These results indicate a negative effect of stocking density on final weight, survival, alkalinity, NO2, PO43 and water consumption, and a positive effect on yield in Nile tilapia fingerling culture (1-20 g) in a low-salinity biofloc system with densities up to 1000 fish/m³.

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 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 The effect of adding molasses in different times on performance of Nile tilapia (Oreochromis niloticus) raised in a low-salinity biofloc system

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Mohammad Hossein Khanjani ◽  
Morteza Alizadeh ◽  
Mohammad Mohammadi ◽  
Habib Sarsangi Aliabad
Keyword(s):  
Digestive Enzymes ◽  
Nile Tilapia ◽  
Stocking Density ◽  
The Body ◽  
Control Group ◽  
Survival Ratio ◽  
Hepatic Enzymes ◽  
Low Salinity ◽  
Nile Tilapia Oreochromis Niloticus ◽  
Experimental Treatments

Abstract This study aimed to evaluate the effect of adding molasses in different times on water quality, growth performance, body biochemical composition, digestive and hepatic enzymes of Nile tilapia in the biofloc system. Tilapia fingerlings (1.53 ± 0.14 g) were distributed in five treatments include control, BFT24 (adding molasses to the tanks every 24 h), BFT48 (48 h), BFT72 (72 h), and BFT96 (96 h) and reared for 37 days in fiberglass tanks (130 L), with a stocking density of one fish per litre. The results showed that highest increase in biomass (740.12 g) and survival (98.97 %) were obtained in BFT24 treatment (P <0.05). The body composition was affected by the experimental treatments so that the highest protein content was obtained in the BFT72 (P<0.05). Digestive enzymes activities were significantly (P<0.05) higher in BFT treatments than the control group. The current study showed, higher biomass and survival ratio for Nile tilapia were observed in BFT24 treatment. The liver and digestive enzymes of Nile tilapia were affected by the different addition times of molasses to the rearing tanks.

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.

scholarly journals Nursery I: The effect of stocking density on the performance of glass eels, Anguilla bicolor in the biofloc system

2018 ◽  
Vol 47 ◽  
pp. 02009
Author(s):  
Purnama Sukardi ◽  
Norman Ari Prayogo ◽  
Tjahyo Winanto ◽  
Asrul Sahri Siregar ◽  
Taufan Harisam
Keyword(s):  
Water Quality ◽  
Weight Gain ◽  
Water Temperature ◽  
High Mortality ◽  
Crude Protein ◽  
Stocking Density ◽  
Crude Lipid ◽  
Central Java ◽  
Final Weight ◽  
Glass Eels

Glass eels of Anguilla bicolor is an expensive and still abundant commodity in Laguna Segara Anakan, Central Java, Indonesia. However, the growth of glass eels to elver is still a problem because of high mortality in nursery I and II. The objective of the study was to evaluate the result of stocking density on the performance of glass eels in the biofloc system during nursery I. Glass eels were stocked at densities of 54.95, 109.89 and 164.84 fish/m3, respectively, with three replicate ponds for each density. Eels were fed a formulated pasta-diet containing 40% crude protein and , 4% crude lipid, 5% crude fiber, 11.5% ash and 12% moisture, respectively. The water quality were maintained at levels of for fish culture througout the experiements: water temperature was 27.1°C (ranged from 26.3 to 28.2°C), pH (7.6, ranged from 6.8 to 7.8) and DO (7.2 mg.L-1, ranged 6.9 to 7.5 mg.L-1). The results showed that the stocking density did not significantly affect the final weight, weight gain, AGR, SGR, FCR and survival, however this had a significant effect on the yield. The biofloc system was suitable for raising glass eels.

scholarly journals EFFECT OF POULTRY LITTER AS AN ORGANIC FERTILIZER, IN WATER QUALITY, PARASITIC ABUNDANCE, AND GROWTH NILE TILAPIA

2021 ◽  
Vol 47 ◽  
pp. e622
Author(s):  
Lidiany Doreto CAVALCANTI ◽  
Élida Jeronimo GOUVEIA ◽  
Emanuelly Costa Ventura SOUZA ◽  
Juliana Rosa CARRIJO-MAUAD ◽  
Márcia Regina RUSSO
Keyword(s):  
Water Quality ◽  
Nile Tilapia ◽  
Organic Fertilizer ◽  
Poultry Litter ◽  
Stocking Density ◽  
Natural Environments ◽  
Culture Cycle ◽  
Peak Abundance ◽  
Gill Parasites ◽  
Physical And Chemical

Nile tilapia feed on plankton in natural environments. This food source can be increased in ponds through fertilization and can reduce feed expenses or improve fish performance when used as supplementary food. Organic fertilization is an alternative to commercial fertilization; however, its use increases concerns regarding water quality and sanitary aspects. This study aimed to evaluate the effects of the use of poultry litter as organic fertilizer on the physical and chemical parameters of water, gill ectoparasite metazoan abundance, and growth of Nile tilapia (Oreochromis niloticus) during the culture cycle lasting 240 days. Four earthen ponds, two fertilized with poultry litter and two non-fertilized ponds, as fertilized and non-fertilized treatments, respectively, were used. Stocking density was 3 fish per m2 with an average initial weight of 0.64 ± 0.15 g. The mean water quality values and the growth performance parameters of Nile tilapia did not show significant differences between the two treatments. The gill parasites found in the fish belonged to the class Monogenea, comprising two genera, Cichlidogyrus and Scutogyrus, with significant differences between treatments. The non-fertilized treatment showed a high abundance of parasites throughout the culture cycle months, with peak abundance in the months with low concentrations of dissolved oxygen in the water.

scholarly journals Water Quality in the Cultivation of Catfish (Clarias gariepinus) and Nile Tilapia (Oreochromis niloticus) in the Aquaponic Biofloc System

2019 ◽  
pp. 1-6
Author(s):  
Irfan Zidni ◽  
Iskandar . ◽  
Ibnu Dwi Buwono ◽  
Benedikta Prasiwi Mahargyani
Keyword(s):  
Water Quality ◽  
Nile Tilapia ◽  
Clarias Gariepinus ◽  
Stocking Density ◽  
Quality Of Water ◽  
Randomized Design ◽  
Nile Tilapia Oreochromis Niloticus ◽  
Nitrite Nitrate ◽  
Fish Productivity

Aims: Water quality is one of them being an important role in terms of cultivation. Good water quality can support growth productivity in aquaculture. This is also of great concern when the rest of fish metabolism results that can contaminate fish contained in the maintenance media and if water is changed every day, water carrying toxins can pollute the area around the cultivation. One of the first steps to reduce the toxic content found in the maintenance media and the area around cultivation is to use aquaponic cultivation using biofloc. It is also expected to minimize the toxin content in maintenance media. This research aims to determine the comparison of the polyculture stocking density of sangkuriang catfish and nile tilapia which results in water quality that supports fish productivity. Study Design:  The research was conducted experimentally. Place and Duration of Study: This research was carried out for 40 days between March 2019 - April 2019 in the Ciparanje Laboratory of the Faculty of Fisheries and Marine Sciences, Universitas Padjadjaran. Methodology: The method used in this research is experimental using a completely randomized design (CRD), consisting of 5 treatments with 3 replications. The treatments to be given are dense stocking variations with the following treatments: A(75 catfish:75 tilapia), B(100 catfish:50 tilapia), C(125 catfish:25 tilapia), D(150 catfish), E(150 tilapia). Results: Water Quality Measured During The Study Namely, DO, Temperature, Ph, Nitrite, Nitrate And Ammonia Are Still In The Threshold For The Growth Of Test Animals During Maintenance. Conclusion: Based on the results of the research that has been done, it can be concluded that the quality of water in maintenance media using aquaponics biofloc gives good water quality values on maintenance media and is still within the threshold for the growth of catfish and tilapia.

Periphyton use on microbial dynamics, water quality, and Nile tilapia growth in rearing tanks

2021 ◽  
Vol 56 ◽  
Author(s):  
Jéssica Lucinda Saldanha da Silva ◽  
Fátima Cristiane Teles de Carvalho ◽  
Rubson Mateus Matos Carvalho ◽  
Oscarina Viana de Sousa
Keyword(s):  
Water Quality ◽  
Nile Tilapia ◽  
Heterotrophic Bacteria ◽  
Experimental Period ◽  
Ammonia Nitrogen ◽  
Quality Parameters ◽  
Artificial Substrate ◽  
Biofilm Growth ◽  
Total Ammonia ◽  
Periphytic Biofilm

Abstract: The objective of this work was to evaluate the effect of the use of an artificial substrate for periphytic biofilm growth on the microbiological composition of the biofilm, water quality, and zootechnical performance of Nile tilapia (Oreochromis niloticus) in rearing tanks. The experiment consisted of two treatments: presence and absence of artificial substrate for the growth of periphyton, with five replicates. Water quality parameters were evaluated throughout the entire experimental period. Every two weeks, samples of the periphyton were collected for the analysis of its microbiological composition and biometric measurements of the fish were performed. The number of heterotrophic bacteria in the biofilm increased during the experimental period, but that of Aeromonas decreased with the use of the artificial substrate. The total ammonia nitrogen in the tanks with periphyton reduced in 30% compared with that of the control. Tilapia reared with the biofilm showed a final weight 2.4 times greater than that of those subjected to the control, as well as an increase of 59.19% in their productivity. The use of an artificial substrate for periphytic biofilm in Nile tilapia rearing tanks favors the maintenance of the quality of the culture water, the protection of the fish against pathogens, and the improvement of the zootechnical performance of the fish.

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