The effect of stocking density on profitability of African catfish (Clarias gariepinus) culture in extensive pond systems

Aquaculture ◽  
2019 ◽  
Vol 507 ◽  
pp. 385-392 ◽  
Author(s):  
Vincent Oké ◽  
Neill Jurgens Goosen
Keyword(s):  
Clarias Gariepinus ◽  
Stocking Density ◽  
African Catfish

scholarly journals Effects of Tank Background Colour on Growth Performance and Feed Utilization of African Catfish Clarias Gariepinus (Burchell, 1822) Fingerlings

2017 ◽  
Vol 75 (1) ◽  
pp. 5-11 ◽  
Author(s):  
Victor Tosin Okomoda ◽  
Lateef Oloyede Tiamiyu ◽  
Gabriel Wase
Keyword(s):  
Growth Performance ◽  
Clarias Gariepinus ◽  
Stocking Density ◽  
Serum Glucose ◽  
African Catfish ◽  
Feeding Rates ◽  
Commercial Diet ◽  
Stress Survival ◽  
Overall Performance ◽  
Tank Colour

Abstract The performance of Clarias gariepinus (Burchell, 1822) fingerlings reared in white, green, blue, black and red coloured tanks was investigated. Each colour was tested in triplicate 1 m3 tanks with an initial stocking density of 100 fingerlings per tank (1.07 g). Fish were fed a commercial diet at 5% body weight per day for eight weeks. Fish weights were sampled every 2 weeks to adjust feeding rates. Tank colour had a significant effect (P < 0.05) on the overall performance of the fingerlings. Rearing in black tanks resulted in a higher daily feed intake (0.44 g) and better growth performance when compared to other tank colours, while the poorest performance was observed in blue and green tanks. Carcass protein and fat content at 8 weeks revealed a trend similar to that observed for growth. Also, serum glucose tests showed higher levels in light background tanks and were thought to be an indication of stress. Survival was not affected by tank colour. It was concluded that dark-coloured tanks such as black or red were better in comparison to light-coloured tanks for the rearing of African catfish fingerlings

scholarly journals Growth performance and feed utilization of African catfish Clarias gariepinus fed a commercial diet and reared in the biofloc system enhanced with probiotic

F1000Research ◽  
2017 ◽  
Vol 6 ◽  
pp. 1545 ◽  
Author(s):  
Iskandar Putra ◽  
Rusliadi Rusliadi ◽  
Muhammad Fauzi ◽  
Usman M. Tang ◽  
Zainal A. Muchlisin
Keyword(s):  
Survival Rate ◽  
Growth Performance ◽  
Crude Protein ◽  
Clarias Gariepinus ◽  
Stocking Density ◽  
Feed Utilization ◽  
African Catfish ◽  
Commercial Diet ◽  
Application Frequency ◽  
Fish Tank

Background The objective of the present study was to evaluate the growth performance and feed utilization of African catfish Clarias gariepinus fed a commercial diet and reared in the biofloc system enhanced with probiotic. Methods The treatment was the frequency of probiotic application into the cultured system, namely, 5-day interval, 10-day interval, and 15-day interval for 60 days of experiment. Biofloc culture was grown in an experiment tank (vol. 2000 L) by mixing the probiotic (Bacillus sp.) 10 mL and molasses 200 mL per liter of water.  The fish was stocked into the biofloc system 7 days after cultured at stocking density of 1000 fish tank-1.  The fish was fed a commercial diet that contains 38% crude protein, twice a day at satiation. The application of probiotic was reperformed after 5 days, 10 days, and 15 days after stocking. Results The study showed that the growth performance, survival, and feed utilization of African catfish were higher in the treatment at 5-day intervals over 60 days. The ANOVA test showed that the application frequency of probiotic into biofloc system of cultured media had the significant effect on the growth performance, survival rate, and feed utilization of African catfish. Conclusion The best growth performance and feed utilization were  found at the application of probiotic into biofloc system at 5-day intervals over 60 days.

scholarly journals Influence of Survival Rate and Growth juvenile of African Catfish (Clarias gariepinus) Against the Probiotic Effective Microorganism-4 (EM-4) on Feed

2020 ◽  
Vol 6 (1) ◽  
pp. 72-80
Author(s):  
Helentina Mariance Manullang
Keyword(s):  
Survival Rate ◽  
Clarias Gariepinus ◽  
Stocking Density ◽  
African Catfish ◽  
Effective Microorganisms ◽  
Average Growth ◽  
Randomized Design ◽  
Average Survival ◽  
Chi Squared ◽  
Effective Microorganism

This study aimed to determine the effect of the use of EM-4 probiotics (effective microorganisms-4) in feed on different stockings in increasing the survival rate and growth of African catfish. This research was conducted by the Faculty of Fisheries Laboratory of the Dharmawangsa University Medan from September to October 2019. The design used in this study was a completely randomized design, with 4 treatments 3 replications. The treatment consists of the different amount of stocking density (P1: 50 fish / 48 liters of water), (P2: 65 fish / 48 liters of water), (P3: 80 fish / 48 liters of water) and (P4: 95 fish / 48 liters of water). The observation result Data is analyzed by variance analysis (ANAVA) after meeting the requirements, Subsequently conducted a variety of error test homogenized and use a chi-squared spread with the formula Steel and Torries (2003). The results showed that the different amount of stocking density affected the growth and graduation of African catfish (Clarias gariepinus) seeds. The optimal density of stocking on the growth and graduation of live African catfish is the density of 50 fish/ 48 liters of water, with an average survival rate of 90.66%, the average growth of absolute weight  19.10 grams and average average growth length 9 cm

scholarly journals Expression of Heat Stress Biomarkers in Wild and Cultured African Catfish Clarias gariepinus (Burchel, 1822)

2019 ◽  
pp. 1-5
Author(s):  
K. Gbadamosi Oluyemi ◽  
R. Osungbemiro Nelson
Keyword(s):  
Heat Stress ◽  
Glucose Level ◽  
Clarias Gariepinus ◽  
Stocking Density ◽  
Quality Parameters ◽  
Average Weight ◽  
African Catfish ◽  
Female Fish ◽  
Wild Female ◽  
Stress Biomarkers

The expression of heat stress biomarkers in wild and cultured African catfish Clarias gariepinus was investigated in this study. Twenty wild and cultured fish species of average weight of 400±50g were obtained from Owena dam, (Latitude: 7°20'46.04"Longitude: 4°59'54.99") and a reputable fish farm in Akure, Ondo State.  Ten male and female fish from the two source were all conditioned for 3days in concrete tanks. The fish were stocked in concrete tanks of 2m x 2m x 1m with the stocking density of 5 in each tank and the water quality parameters were monitored. Fish were subjected to hyperthermia-induced shock at 39oC with the aid of a 2-kW heating rod (Binatone, Japan). At the end of the hyperthermia-induced stress. Blood samples were collected to determine the glucose level and the expression of Heat Shock Protein (HSP). The highest glucose level of 50mg /l was found in the cultured male African catfish and the lowest glucose level of 18mg/l was found in wild female African catfish. There was higher diversity and expression of HSP in cultured female fish than the wild male. The result of this study showed that the expression of stress biomarkers in African catfish Clarias gariepinus was influenced by the gender and the environment where the fish was found with the male and wild fishes showing more resistance to stress.

scholarly journals Aquaponics (s.l.) Production of Spearmint (Mentha spicata) with African Catfish (Clarias gariepinus) in Northern Germany

2020 ◽  
Vol 12 (20) ◽  
pp. 8717
Author(s):  
Ulrich Knaus ◽  
Lisa Carolina Wenzel ◽  
Samuel Appelbaum ◽  
Harry Wilhelm Palm
Keyword(s):  
Leaf Area ◽  
Growth Parameters ◽  
Clarias Gariepinus ◽  
Stocking Density ◽  
Leaf Length ◽  
African Catfish ◽  
Northern Germany ◽  
Mentha Spicata ◽  
Liquid Fertilizer ◽  
Fresh Biomass

Aquaponics production of spearmint (Mentha spicata) was evaluated under commercial grow-out conditions of African catfish (Clarias gariepinus) in Northern Germany (Mecklenburg-Western Pomerania). Fish batch production under different stocking densities in an extensive aquacultural unit (EAU) and an intensive aquacultural unit (IAU) was connected to conventional plant cultivation on ebb-and-flood planting tables and compared to a liquid fertilizer control. The best growth parameters of M. spicata were found under the intensive stocking density of C. gariepinus (IAU), resulting in a plant leaf area of 10.9 ± 2.5 cm2, leaf length of 8.6 ± 1.6 cm, and a cut fresh biomass from aboveground of 31.8 ± 13.8 g/plant, compared to the EAU (5.6 ± 2.1 cm2; 5.4 ± 1.4 cm; 17.4 ± 4.7 g/plant) and the control (5.7 ± 2.2 cm2; 5.5 ± 1.4 cm; 11.2 ± 5.3 g/plant). The fresh biomass of the whole plants was not significantly different between the EAU (165.5 ± 71.7 g/plant) and the IAU (190.7 ± 105.6 g/plant), though the latter gained more weight. The initial fish number ratio between the EAU and the IAU of 1/4 increased the M. spicata leaf area by twofold in the IAU. Our results demonstrate that aquaponics (s.l.) production of M. spicata is possible under the direct use of effluent waters from intensive African catfish cultivation without the addition of any liquid fertilizer.

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