scholarly journals Integrated cage-cum-pond culture system with walking catfish (Clarias batrachus) in cages and tilapia (Oreochromis niloticus) in open ponds

2017 ◽  
Vol 4 (3) ◽  
pp. 221-227
Author(s):  
Phanindra Sangma ◽  
Md Abdul Wahab ◽  
Shahroz Mahean Haque ◽  
Sanjib Kumar Mondal
Keyword(s):  
Crude Protein ◽  
Stocking Density ◽  
Environmental Benefits ◽  
Daily Weight Gain ◽  
Open Pond ◽  
A Value ◽  
Pond Culture ◽  
Significant Difference ◽  
Net Profit ◽  
Pelleted Feed

An experiment was conducted for a period of 97 days at the Fisheries Field Laboratory Complex, Bangladesh Agricultural University, Mymensingh to determine the potential of the cage-cum-pond culture of walking catfish, as well as to assess the economic and environmental benefits of this system. The experiment had two treatments in triplicate. One treatment comprised walking catfish in cage and tilapia in open pond, and the other treatment comprised both walking catfish and tilapia stocked together in open ponds. Ponds of both treatments were stocked with walking catfish and tilapia at a stocking density of 10,000 and 20,000 ha-1, respectively. Fishes in both treatments were fed with commercial pelleted feed (26% crude protein) twice daily at the rate of 10% body weight of walking catfish. All ponds were fertilized with urea and TSP at a rate of 50 kgha-1 bi-weekly. Survival of catfish was very low in both treatments ranging from 8.33 to 21.33%. Specific growth rate of catfish was significantly higher (P<0.021) in treatment-2 than in treatment-1 with a value of 2.42 and 1.69 g fish-1d-1, respectively. The net yield for catfish of treatment-1 and 2 were 49.67 and 43.45 kgha-1, respectively and there was no significant difference between the treatments. The survival rate of tilapia was 65.17 and 71.17% with daily weight gain of 2.31 and 2.22g fish-1 in treatment-1 and 2, respectively. Net yield were 817.00 and 790.63 kg ha-1, respectively and there were no significant difference in net yield of tilapia between treatments. Net profit obtained from integrated-cage-cum pond culture (Tk. 24,518 ha-197d-1) was higher than that of open pond (Tk 22,685 ha-197d-1).Res. Agric. Livest. Fish.4(3): 221-227, December 2017

Effects of Different Stocking Densities on Growth, Serum Steroid Hormone Concentrations, Gonadosomatic Index and Sex Reversal in the Rice Field Eel, Monopterus albus (Zuiew)

2011 ◽  
Vol 142 ◽  
pp. 233-237
Author(s):  
Han Wen Yuan ◽  
Fang Chen ◽  
Qiao Qing Xu ◽  
Shi Yuan Gong ◽  
Zhang Jie Chu ◽  
...  
Keyword(s):  
Rice Field ◽  
Steroid Hormone ◽  
Gonadosomatic Index ◽  
Stocking Density ◽  
Sex Reversal ◽  
The Other ◽  
Daily Weight Gain ◽  
Monopterus Albus ◽  
Rice Field Eel ◽  
Significant Difference

The effects of stocking density on various growth parameters and sex reversal in the rice field eel (Monopterus albus) were investigated by evaluating steroid hormone, the gonadosomatic index (GSI) and sex ratio. Fish (mean initial weight of 9.88 ± 0.70 g) were stocked to densities of 4, 20, 36, 52, 68, 84 or 100 fish/m2 in cages (2 m × 1 m × 1.5 m) in a pond, with five replicate cages for each density. Fish were fed for 420 days on a formulated isocaloric diet containing 40.22% crude protein and 12.86 MJ/kg. Serum E2 and T concentrations were determined by radioimmunoassays. There were no significant differences in final bodyweight (FBW) and daily weight gain (DWG) for fish in the groups containing less than 52 fish/m2, while FBW and DWG were significant lower in groups at 68 fish/m2 or more. Specific growth rate (SGR) differed significantly between the 84 and 100 fish/m2 groups compared with the 4, 20 and 36 fish/m2 groups. There was no significant difference in SGR in groups containing less than 84 fish/m2. There were no significant difference between the 4 and 20 fish/m2 groups in net yield (NY), but these groups did differ significantly from the other groups. The final condition factors of fish stocked at 84 or 100 fish/m2 were significantly lower than fish stocked at the other densities. E2 and T hormone concentrations declined as stocking density increased, while GSI values increased initially but then reduced with increasing stocking density. Female ratio and survival decreased with increasing stocking density. The proportion of male fish was significantly greater in the three highest stocking density groups. Therefore, high stocking density may promote sex change from female to male in M. albus.

scholarly journals Performance, blood chemistry, carcass and economic evaluation of sheep on dietary supplements of cabbage and carrot wastes

2021 ◽  
Vol 12 (2) ◽  
pp. 574-586
Author(s):  
Michael Igbaekemen Okoruwa ◽  
Emmanuel Eromosele Ikheloa ◽  
Debola Olusegun Oshibanjo
Keyword(s):  
Economic Evaluation ◽  
Blood Cell ◽  
Blood Chemistry ◽  
Daily Weight Gain ◽  
Control Group ◽  
Corpuscular Haemoglobin ◽  
Significant Difference ◽  
Net Profit ◽  
Guinea Grass ◽  
Mean Corpuscular Haemoglobin

The study was conducted to determine the effect of cabbage and carrot wastes supplementation on performance, blood chemistry, carcass and economic evaluation of sheep. Twenty four West African dwarf male sheep of about 8 – 9 months old with average initial weight of 9.00 ± 0.94kg were randomly allotted to four dietary treatments with six sheep per treatment, in a completely randomized design. The sheep received 60% guinea grass and 40% concentrate diet for TD1 (control group), while 50% guinea grass and 40% concentrate diet with either 10% cabbage waste, 5% cabbage plus 5% carrot wastes or 10% carrot waste were for diets TD2, TD3 and TD4 respectively. The results showed that sheep on TD1 were significantly (p<0.05) higher in feed conversion ratio, creatinine, urea, rumen with intestine and total fixed cost. Diet TD2 was significantly (p<0.05) improved in daily weight gain, digestibility of dry matter, crude protein with fiber and nitrogen free extract, haemoglobin, packed cell volume, mean corpuscular haemoglobin, white blood cell, lymphocyte, neutrophil, total protein, albumin, glucose, dressing percentage, sale of sheep, total revenue and net profit. Red blood cell, cholesterol and triglyceride were increased significantly (p<0.05) in TD3, while daily feed intake, digestibility of ash, feed cost and total variable cost were better in TD4. Meanwhile, no significant difference (p>0.05) was found in initial body weight, ether extract digestibility, mean corpuscular volume, mean corpuscular haemoglobin concentration, monocyte, eosinophil, basophil, globulin and some relative organs weight among sheep on treatments. It can be concluded that inclusion level of 10% cabbage waste as supplement to 50% guinea grass and 40% concentrate diet (TD2) improved performance, health status and carcass indices of sheep with reduced cost that resulted in higher net profit.

scholarly journals Effect of dietary supplementation of minerals premix on growth performances and return in red tilapia (Oreochromis nilloticus x Oreochromis mossambicus)

2020 ◽  
Vol 2 (1) ◽  
pp. 23-28
Author(s):  
Krasindh Hangsapreurke ◽  
Boonyarath Pratoomchat ◽  
Jiranan Seetaikum ◽  
Nissara Kitcharoen
Keyword(s):  
Production Cost ◽  
Stocking Density ◽  
Daily Weight Gain ◽  
Water Volume ◽  
Average Weight ◽  
Fish Production ◽  
Red Tilapia ◽  
Mineral Supplementation ◽  
Significant Difference ◽  
Concrete Tank

Tilapia is a popular fish for consumers and aquaculture in every part of Thailand. This study was conducted to determine the level of mineral supplementation in the diet for the growth of red tilapia fingerlings, which gave the lower fish production cost. The fingerlings with an initial average weight of 3.1 ± 0.48 g and a length of 2.5±0.24 cm were raised in 3 m3 concrete tank with 1.5 m3 of water volume at 20 fish/m2 stocking density. Fish were fed with pellets diet (28 % crude protein), which contained different levels of mineral supplements (0 (control), 20 and 40 g/Kg) in triplicate replications. The experiment was conducted within 80 days. The results showed that fish fed with diet3 had better average daily weight gain (ADG) and food conversion ratio (FCR) than diet2 and diet1 significantly (P<0.05). The ADG and FCR of fish fed with diet3 showed 0.70 ± 0.02, 1.72 ± 0.02 respectively, but there was a non-significant difference in survival rate from all treatments (P>0.05), and the fish production cost of diet 3 is lower than those in diet1 and diet2. Thus, this experiment concluded that minerals supplementation at the level 40 g/kg diet were suitable for tilapia aquaculture.

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 Effects of Stocking Density on Growth and Production Performance of Indigenous Stinging Catfish, Heteropneustes fossilis (Bloch)

2013 ◽  
Vol 2 (2) ◽  
pp. 9-14 ◽  
Author(s):  
AHM Kohinoor ◽  
MM Khan ◽  
S Yeasmine ◽  
P Mandol ◽  
MS Islam
Keyword(s):  
Crude Protein ◽  
Stocking Density ◽  
Production Performance ◽  
Heteropneustes Fossilis ◽  
Earthen Ponds ◽  
Pelleted Feed ◽  
The Mean ◽  
On Farm

An on-farm experiment was undertaken in nine earthen ponds to evaluate the growth and production potentials of stinging catfish shing, Heteropneustes fossilis for the period of six months from March to August 2010. Three stocking densities such as 1,25,000 (T1), 1,87,500 (T2) and 2,50,000 ha-1 (T3) were tested with three replications each. Fish were fed with commercial pelleted feed containing 35% crude protein. After six months rearing, the mean harvesting weights of shing were 69.42±6.20, 58.74±3.85 and 49.50±4.52g in T1, T2 and T3, respectively. Significant (P<0.05) highest mean harvesting weight was found in T1. The best survival was found in T1 (87%) among the treatments. The calculated mean production of shing (H. fossilis) in three treatments such as T1, T2 and T3 were 7549±52, 9031±71 and 8786±60 kg ha-1, respectively, which were significantly different (p<0.05) from each other. DOI: http://dx.doi.org/10.3329/ijarit.v2i2.14009 Int. J. Agril. Res. Innov. & Tech. 2 (2): 9-14 December, 2012

scholarly journals Effects of stocking density on performance of snubnose pompano juvenile (Trachinotus blochii) reared in recirculating system

2021 ◽  
Vol 13 (Aquaculture) ◽  
pp. 30-36
Author(s):  
Ngoc Hai Tran ◽  
Nguyen Duy Khoa Tran ◽  
Tomonari Kotani ◽  
Van Khanh Ly ◽  
Quoc Viet Le
Keyword(s):  
Growth Rate ◽  
Body Weight ◽  
Crude Protein ◽  
Settling Tank ◽  
Stocking Density ◽  
Experimental System ◽  
Marine Water ◽  
Significant Difference ◽  
Trachinotus Blochii

This study aimed to determine appropriate densities for rearing pompano juvenile (Trachinotus blochii) in a recirculating system. Four treatments of stocking density were evaluated including 500, 1.000, 1.500, and 2.000 inds/m3 in triplicate. The experimental system for pompano rearing was designed with 120-L tanks connected to 1 settling tank, 1 filter tank, 1 stone filter tank (contained 250 L of filter volume for each tank). The system was fulfilled with marine water at 30 ‰ of salinity and aerated continuously. Pompano were initially stocked at 0.07 ± 0.03 g/fish of body weight and daily fed using commercial pellet contained 55% of crude protein. After 30 days of rearing, the fish stocked at 1.000 individuals/m3 showed the best results in growth rate (0.060 g/day of DWG and 10.97 %/day of SGR) and was significantly higher than the treatment stocked at 1,500 and 2,000 inds/m3 (p < 0.05), however, no significant difference was observed between  1,000 and 500 treatments (p > 0.05).

scholarly journals Effect of stocking density and use of environmental enrichment materials on the welfare and the performance of pigs in the growth and finishing phases

2020 ◽  
Vol 18 (4) ◽  
pp. e0504
Author(s):  
Edilson D. Caldas ◽  
André Michelon ◽  
Luciana Foppa ◽  
Sandra M. Simonelli ◽  
Carlos R. Pierozan ◽  
...  
Keyword(s):  
Environmental Enrichment ◽  
Stocking Density ◽  
Daily Weight Gain ◽  
Feed Conversion ◽  
Performance Variables ◽  
Significant Difference ◽  
Enriched Environments ◽  
And Behavior ◽  
Behavioral Frequencies ◽  
Feed Conversion Rate

Aim of study: To evaluate the effects of stocking density and the use of environmental enrichment (EE) objects on the welfare and the performance of pigs in the growing and finishing phases.Area of study: The southern region of Brazil.Material and methods: A total of 240 pigs, 120 immunocastrated males and 120 females, with an initial weight of 22.38 ± 2.38 kg and mean age of 65 days, were submitted to two stocking densities conditions (0.85 and 1.28 m²pig) with and without EE for 117 days. The experimental design was a 2×2×2 factorial (two categories, two densities, and two EE conditions), with six replicates. Performance variables and behavior were evaluated.Main results: For stocking density, there was a significant difference in the finishing phase from 148 to 161 days of age for the final weight (FW), average daily weight gain (ADWG), and feed conversion rate (FCR). For the EE factor, there was no difference in any of the phases or in the overall period. In the overall period, the higher availability of space improved the results of FW (140.56 kg vs 136.63 kg), ADWG (1.005 kg vs 0.974 kg), and FCR (2.05 vs 2.10). There was no effect of EE, stocking densities, or their interaction on the frequency of different behaviors of the pigs in the growth and finishing phases.Research highlights: There was no effect of interactions between enriched environments, stocking densities, and sex for animal performance and behavioral frequencies; however, differences between the factors were observed separately. The higher availability of space improved the results of FW, ADWG, and FCR.

scholarly journals All male nile tilapia Oreochromis niloticus fry nursing in net cages at haor of Sunamganj, Bangladesh

2019 ◽  
Vol 47 (1) ◽  
pp. 149-158
Author(s):  
MS Islam ◽  
N Begum
Keyword(s):  
Growth Rate ◽  
Nile Tilapia ◽  
Large Scale ◽  
Survival Rates ◽  
Stocking Density ◽  
Daily Weight Gain ◽  
Daily Growth ◽  
Nile Tilapia Oreochromis Niloticus ◽  
Significant Difference ◽  
Net Cages

Nile tilapia (Oreochromisniloticus) of average 2.08 ± 0.06 to 2.14 ± 0.19 g fry nursed in nine-floating net-cages of 3 × 3 × 1.5 m in highstocking densitiesof 600, 800 and 1000 fry m–3 densities in triplicate. The fish were hand-fed a commercial tilapia floating feed at a rate of 5 to 30% of their body weight thrice daily. The final mean weight of tilapia ranged 15.13 ± 0.28 to 24.10 ± 0.35 g with the mean daily weight gain of 0.21 ± 0.11 to 0.38 ± 0.05 g/day. The low stocking density of 600 fry m–3 had significant higher mean weight, daily growth rate and specific growth rate than did the higher density treatment of 1000 fry m–3.The food conversion ratio were (1.46 to 2.30) significantly affected by stocking density (p<0.05). Moreover, the net profit (BDT 1262 ± 85 - 2152 ± 55) showeda significant difference with increasing stocking density (p < 0.05). The growth of nursing fry was found to be density dependent. However, survival rates were found high in all treatments and were not affected by density. But, higher gross yield was observed at the highest density. The results of this study has clearly demonstrated that the higher density (800and1000 fry m–3) could be more profitable for tilapia cages than the lower density (600fry m–3) in terms of cost effectiveness and to meet the demand for large scale fish production. Bangladesh J. Zool. 47(1): 149-158, 2019

scholarly journals Dynamics of some limnological characteristics in pacu (Piaractus mesopotamicus) culture tanks as function of handling

1999 ◽  
Vol 59 (4) ◽  
pp. 543-551 ◽  
Author(s):  
L. H. SIPAÚBA-TAVARES ◽  
M. A. G. de MORAES ◽  
F. M . de S. BRAGA
Keyword(s):  
Water Quality ◽  
Crude Protein ◽  
Stocking Density ◽  
The Other ◽  
Indigenous Species ◽  
Water Residence Time ◽  
Piaractus Mesopotamicus ◽  
Protein Levels ◽  
Significant Difference ◽  
Fish Tanks

In order to study the water quality in fish tanks, a 166-day (January to July 1992) experiment was realized using the indigenous species "pacu" (Piaractus mesopotamicus). Two different protein levels were tested in the diet (16% and 34% crude protein) and three stocking densities (0.25, 0.50 and 0.77 fish/m²). From the results, it was observed that the interactions between stocking density and experiment length affected the characteristics bicarbonate and alkalinity, as well as the interaction between stocking density and protein levels affected concentrations of free and total CO2, conductivity and pH (P < 0.05). The water temperature in tanks changed significantly during the period of study (P < 0.05),decreasing gradually from summer to winter. There was no significant difference in water residence time in the tanks (P < 0.05) during the experiment. The other limnological characteristics were not affected by treatments during study period.

scholarly journals Suitable Stocking Density Ensures Best Production and Economic Returns in Floating Cage Aquaculture System

2021 ◽  
pp. 7-18
Author(s):  
Naznin Nahar ◽  
Md. Istiaque Hossain ◽  
Md. Mizanur Rahman ◽  
Probin Kumar Dey ◽  
M. Shahanul Islam
Keyword(s):  
Crude Protein ◽  
Stocking Density ◽  
Economic Feasibility ◽  
Total Production ◽  
Economic Returns ◽  
Aquaculture System ◽  
Net Profit ◽  
Cage Aquaculture ◽  
Near Future ◽  
Pellet Feed

The striped dwarf catfish Mystus cavasius being a least concern small indigenous fish it is necessary to protect the species from extinction in the near future. An experiment on production and economic feasibility of Mystus cavasius in cage was conducted for a period of six months from March to August 2020 in beel hilla at Naogaon district of Bangladesh. The study was carried out in nine cages (rectangular 8x5x2 feet size) under three treatments namely T1, T2 and T3 performed with the stocking densities of 46 fry m-2, 92 fry m-2 and 137 fry m-2 and designed each with three replications. The fish was fed with commercial pellet feed (containing 30% crude protein) twice daily at the rate of 5-7% of fish body weight. The total production was found to be significantly (p<0.05) highest in T3 among the three treatments. The net profit was better in T3 than T1 and T2 in terms of better production and money. So, stocking density of Mystus cavasius at the rate of 137 fry m-2 in cage could be an economically feasible aquaculture technique for fish farmers.

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