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 In Vivo Radioprotective Activity of Cell-Permeable Bifunctional Antioxidant Enzyme GST-TAT-SOD against Whole-Body Ionizing Irradiation in Mice

2017 ◽  
Vol 2017 ◽  
pp. 1-9 ◽  
Author(s):  
Jianru Pan ◽  
Huocong He ◽  
Ying Su ◽  
Guangjin Zheng ◽  
Junxin Wu ◽  
...  
Keyword(s):  
Growth Rate ◽  
Antioxidant Activity ◽  
Body Weight ◽  
Whole Body ◽  
White Pulp ◽  
Radioprotective Activity ◽  
Significant Difference ◽  
Wbc Count

GST-TAT-SOD was the fusion of superoxide dismutase (SOD), cell-permeable peptide TAT, and glutathione-S-transferase (GST). It was proved to be a potential selective radioprotector in vitro in our previous work. This study evaluated the in vivo radioprotective activity of GST-TAT-SOD against whole-body irradiation. We demonstrated that intraperitoneal injection of 0.5 ml GST-TAT-SOD (2 kU/ml) 2 h before the 6 Gy whole-body irradiation in mice almost completely prevented the splenic damage. It could significantly enhance the splenic antioxidant activity which kept the number of splenic white pulp and consequently resisted the shrinkage of the spleen. Moreover, the thymus index, hepatic antioxidant activity, and white blood cell (WBC) count of peripheral blood in irradiated mice pretreated with GST-TAT-SOD also remarkably increased. Although the treated and untreated irradiated mice showed no significant difference in the growth rate of animal body weight at 7 days postirradiation, the highest growth rate of body weight was observed in the GST-TAT-SOD-pretreated group. Furthermore, GST-TAT-SOD pretreatment increased resistance against 8 Gy whole-body irradiation and enhanced 30 d survival. The overall effect of GST-TAT-SOD seemed to be a bit more powerful than that of amifostine. In conclusion, GST-TAT-SOD would be a safe and potentially promising radioprotector.

scholarly journals Water quality, growth and production performance of stinging catfish, Heteropneustes fossilis (Bloch) in cemented tanks with two different stocking densities

2019 ◽  
Vol 47 (1) ◽  
pp. 107-119
Author(s):  
Dulon Roy ◽  
Abdullah Al Masud ◽  
Pritam Kumar Saha ◽  
MM Kutubuddin ◽  
Md Muzahidul Islam
Keyword(s):  
Water Quality ◽  
Body Weight ◽  
Survival Rate ◽  
Stocking Density ◽  
Culture Technique ◽  
Production Performance ◽  
Heteropneustes Fossilis ◽  
Tank Culture ◽  
Significant Difference ◽  
T1 And T2

Attempt has been taken to develop intensive tank culture technique providing natural environment for Stinging catfish (Heteropneustes fossilis) inside tank to increase survival rate as well as production. The experiment was conducted for a period of 150 days in two tanks (T1 and T2) of 300 m2. Fish fries with a mean weight and length ranged from 1.02 to 2.2 g and 2.7 to 3.5 cm were stocked in T1 and T2, respectively. Stocking density of fingerlings were 1, 25,000 and 1, 50,000 per Ha in T1 and T2, respectively. Commercial pelleted feed was supplied to tank reared fish twice daily at a rate of 3-10% of body weight per day and later feeding rate was adjusted based on body weight by sampling. Important water quality parameters (temperature, DO, pH, transparency, ammonia and nitrate) were recorded weekly throughout the culture period. Survival rate was 87% and 84% in T1 and T2, respectively. Mean final weight were 41.73 ± 2.09g and 40.6 ± 0.90 g in T1 and T2, respectively. Length-weight relationship indicates that the growth rate was always higher in T1 followed by T2. Results showed that net yield was relatively higher in T2 (5115.35 ± 113.13 Kg/ha) than T1 (4537.12 ± 227.4 Kg/ha). In case of production, there was significant difference (p < 0.05) between two treatments. This experiment demonstrated the potential of H. fossilis production through new technique of tank culture system. However, more research is needed using local feed ingredients with higher stocking density. Bangladesh J. Zool. 47(1): 107-119, 2019

scholarly journals Comparative Study On Nursing Of Different Strains Of Tilapia (Oreochromis niloticus) In Bangladesh

2016 ◽  
Vol 5 (2) ◽  
pp. 98-106
Author(s):  
MA Hossain ◽  
MJ Islam ◽  
MM Uddin ◽  
MM Hossain ◽  
M Kunda
Keyword(s):  
Growth Rate ◽  
Body Weight ◽  
Survival Rate ◽  
Body Weight Gain ◽  
Stocking Density ◽  
Experimental Period ◽  
Mustard Oil ◽  
Feed Conversion ◽  
Different Strains ◽  
The Individual

This study was conducted to investigate and compare the growth performance of four Tilapia strains in hapa nursing with the aim to find out the best strain of tilapia. The research was conducted by four treatments with five replicates each. The tilapia fry were collected from, BFRI source from BFRI HQ, Mymensingh stocked in Treatment-1; unknown source from Hi-Tech Tilapia Hatchery Dagoanbhuiya, Feni in Treatment-2, Philipine strain from Green Field Tilapia Hatchery, Laxmipur in Treatment-3 and fry from Breeding Cohort, Sonar Bangla Hatchery, Bamna, Barguna in Treatment-4. The Individual stocking weight (g) of fry was average 0.01g. The fries were stocked in 12 hapa at same stocking density of 1200 fish/m2. Each of the hapa was 2m × 1m × 1m size and fixed in an earthen ponds. Supplementary feed with 31.29% of protein level consisting of rice bran (25%), mustard oil cake (15%), wheat flour (30%) and fish meal (30%) was given at the rate of 40% of their body weight per day manually, four times a day at the beginning of the experimental period and reduced to 25% of their body weight and continued up to harvesting period. The results showed that fry of Treatment-4 strain was the best strain and had significantly (p < 0.05) higher final mean body weight (FMBW), mean body weight gain (MBWG), specific growth rate (SGR) (9.75%), gross yield (GY) (2.13) and Net yield (NY) (2.12) than the Treatment-1 , Treatment-2 strains and Treatemnt-3 strain. Treatment-4 strain had the fastest growth rate, whereas the lowest performing strain was that from Treatment-2. We also analyzed survival rate of the fish from stocking to harvest, survival rate was highest in Treatment-4 strain (80%) where lowest is Treatment-3. Treatment-4 stain also showed the best feed conversion ratio (FCR) 1.62 than others. Considering the overall performance it can be concluded that tilapia strain collected from Breeding Cohort source is best among the four strains. However, further research may still be needed to compare more strains from different water body to evaluate the genetic potential for Tilapia.International Journal of Natural Sciences (2015), 5(2) 98-106

scholarly journals Culture Pond Influences the Growth and Survival of Clarias gariepinus Fingerlings reared in Poly and Monoculture

2021 ◽  
pp. 22-28
Author(s):  
L. U. Onyia ◽  
I. J. Ochokwu ◽  
I. J. Bargudu
Keyword(s):  
Growth Rate ◽  
Growth Parameters ◽  
Block Design ◽  
Clarias Gariepinus ◽  
Stocking Density ◽  
Physical Space ◽  
Single Species ◽  
Growth And Survival ◽  
Significant Difference ◽  
Earthen Ponds

Monoculture is the rearing of single species of fish in a pond while polyculture is the farming of two or more species in the same physical space. This study aims to compare the growth parameters of Clarias gariepinus fingerlings in monoculture and polyculture, using concrete and earthen ponds in a randomized complete block design. The polyculture, comprised of Clarias gariepinus and Oreochromis niloticus. 480 fingerlings were used; the stocking density was 40fish in a 3x2x1.5m depth with initial weight (4.84±0.11547) for C. gariepinus in monoculture and 40 each in polyculture with an initial pooled weight of O. niloticus (50g) replicated thrice, it was fed for eight weeks with commercial feed (40% crude protein). Weekly, random sampling was done to measure the growth and adjust the feeding rate. The results revealed that polyculture has the best mean final weight (160.07±0.18559g) and weight gain of 155.29, while the highest total length (45.666±3.179) was recorded in monoculture for Clarias gariepinus reared in an earthen pond. The polyculture had the highest specific growth rate (2.46), Relative growth rate (246.49), and condition factor (0.184). There was a significant difference (P<0.05) in monoculture of both concrete and earthen ponds.

scholarly journals Pertumbuhan benih ikan mas, Cyprinus carpio, yang diberi pakan dengan dosis dan frekuensi berbeda

2020 ◽  
Vol 8 (1) ◽  
Author(s):  
Tinus O O. Biduan ◽  
Indra R. N. Salindeho ◽  
Hariyani Sambali
Keyword(s):  
Growth Rate ◽  
Body Weight ◽  
Cyprinus Carpio ◽  
The Body ◽  
Optimum Dose ◽  
Daily Growth Rate ◽  
Daily Growth ◽  
Feeding Regime ◽  
Significant Difference ◽  
Recirculation System

The objectives of this research were to find out the optimum dose and frequency of feeding regime to ensure the maximum growth of carp-seeds, Cyprinus carpio, reared in the backyard pond with recirculation system. The experiment was carried out in 2x3 factorial experimental design and the experimental units were designed in randomized block.  Two factors were tested in this experiment; the first factor, dose of feeding, had three levels, 3%, 4% and 5% of the total body weight per day; and the second factor had 2 levels, 2 and 3 times per day.   Hence there were 6 treatments were applied, and each treatment was triplicated.   Each repetition represented group of fish with different weight.  There were 18 experimental units, and each experimental unit was composed of 8 tested fish, therefore there were 144 tested fish, which were weighed at the beginning of the experiment and then every week during the 6 weeks period of the experiment.  The weight data were converted into FCR, absolute, relative and daily growth rate, and were statistically analyzed using JMP statistic-program (SAS-institute).             The results showed the absolute growth of fish at dose of 3% was significantly lower than that of fish at the dose of 4% and 5%, which was not significantly different.   The relative and daily growth rate was not significantly affected by the different dose of feeding regime.  There was no significant difference in FCR, absolute, relative and daily growth rate between fish fed 2 and 3 times per day.  The best FCR, 1,46, was performed by fish fed 3% of the body weight per day, and this value was significantly different with that of the fish fed 4% or 5%.   The results of this experiment suggest that, carp reared in backyard pond with recirculation system should be fed twice a day, with a dose of 3% of the body weight each day.

scholarly journals Milchaufnahme und Wachstumsleistung von Saugkälbern der Deutschen Rotbunten und der Deutschen Schwarzbunten im alten Typ während der Winterstallhaltung Einflüsse durch das Geschlecht und das Alter des Kalbes

2004 ◽  
Vol 47 (1) ◽  
pp. 47-58
Author(s):  
M. Steinhardt ◽  
H.-H. Thielscher
Keyword(s):  
Growth Rate ◽  
Body Weight ◽  
Male And Female ◽  
Black And White ◽  
Weight Difference ◽  
Significant Difference ◽  
Body Weight Difference ◽  
White Breed ◽  
Cow Calf ◽  
Milk Ingestion

Abstract. Title of the paper: Milk ingestion and growth performance of suckler calves born during winter stalling from German Red and White breed and from old type German Black and White breed in a cow-calf operation On 14 calves from German Red and White breed and on 17 calves from old type German Black and White breed in a cow-calf operation measurements of body weight were done repeatedly during growth after separating the calves from the dams for 150 min and than again after the calves had contacted the dams for 60 min. Measurements took place always at the same daytime. Milk ingestion of calves was assessed by way of body weight difference method. Acute body weight difference varied markedly between calves and increased with age. The fraction of positive weight difference of all measurements was between 60 % and 86,2 % (male 60 % and 86,2 %; female 67,6 % and 80,6 %) in DRB breed and between 69,1 % and 89,3 % (male 72,9 % and 89,3 %; female 69,1 % and 82,6 %) in DSB breed. Means of all measurements showed a significant difference of acute positive body weight change and of growth rate between breeds and sexes. Mean acute positive body weight changes developed with life age and body growth with different degree in male and female calves. Growth rate of calves showed greater inter- and intraindividual variation from 1 to 10 days of life age. Differences in growth rate between male and female calves were more profound in DRB breed than in DSB breed.

scholarly journals CONDITION FACTOR OF NILE TILAPIA, OREOCHROMIS NILOTICUSFRY UNDER THE INFLUENCE OF DIFFERENT PROTEIN LEVELS IN A BIOFLOC SYSTEM

2020 ◽  
Vol 8 (12) ◽  
pp. 25-34
Author(s):  
Wilfred O. Zablon ◽  
◽  
Albert Getabu ◽  
Erick O. Ogello ◽  
Job O. Omweno ◽  
...  
Keyword(s):  
Body Weight ◽  
Protein Level ◽  
Condition Factor ◽  
Carbon Sources ◽  
Stocking Density ◽  
Fish Farming ◽  
Nutrient Analysis ◽  
Protein Levels ◽  
Significant Difference ◽  
Lower Protein

The study was conducted at Kenya Marine Fisheries Research Institute (KMFRI), Sangoro Station, Kenya to compare the growth perfomance of Oreochromis niloticusfry under different protein levels in a biofloc system using weight-length regression models and Fulton`s condition factor (K). Fry of initial mean weight 0.07 ± 0.03 g and length 1.30 ± 0.24 cm were randomly stocked in 18 aquarium tanks with capacity of 50 litres at stocking density of one fish Litre-1. The experiment was set in a greenhouse under controlled temperature and dissolved oxygen conditions using aerators and thermostat heaters. The biofloc used glucose and molasses as carbon sources which were assigned at 22%, 27% and 35% crude protein levels randomly to the aquaria. The fish were fed on their daily ration twice a day at 5% body weight for 14 weeks. Physicochemical parameters were recorded daily using a multiparameter meter and water samples collected before fish sampling for nutrient analysis. A sample of 30 fish per tank were used for taking body weight and total length measurements using an electronic balance and a measuring board respectively. Fry in all treatments exhibited allometric growth with b coefficient varying between 2.54 and 2.66. Average Fultons condition factor ranged between 1.77-1.84 with no significant difference (P>0.05)among the protein levels and the bioflocs. The condition factor showed both carbon sources were suitable for use in the biofloc system and hence replacement of higher protein level (35%) with lower protein level (22%) to reduce the production cost is a feasible application of the biofloc system in fish farming.

scholarly journals Effects of Graded Dietary Protein on Growth and Laying Performance of Pearl Guinea Fowl (Numida meleagris)

2020 ◽  
pp. 23-29
Author(s):  
Korankye Okyere ◽  
James Kwame Kagya- Agyemang ◽  
Serekye Yaw Annor ◽  
Akwasi Asabere- Ameyaw ◽  
Clement Gyeabour Kyere ◽  
...  
Keyword(s):  
Body Weight ◽  
Weight Gain ◽  
Crude Protein ◽  
Body Weight Gain ◽  
Guinea Fowl ◽  
Feed Consumption ◽  
Dietary Crude Protein ◽  
Numida Meleagris ◽  
Laying Performance ◽  
Significant Difference

This study was conducted to investigate the effect of dietary crude protein (CP) on growth and laying performance of indigenous Guinea fowls (Numida meleagris) in Ghana. A total of Sixty (60) grower pearl Guinea fowl made up of twelve (12) males and forty-eight (48) females were randomly selected and grouped into four made up of (4) females and one (1) male. The groups were each subjected to four experimental diets containing 16%, 18%, 20% and 22% crude protein (CP). A completely randomized design (CRD) was used for the experiment. The data collected were subjected to analysis of variance (ANOVA) using GenStat version 11.1 (2008). Least significant difference (LSD) at 5% was used to separate the means. The result showed that birds fed with diets containing 22% crude protein (CP) had the heaviest (P= .05) body weight and body weight gain and reached age at first egg earlier followed by birds fed with diets containing 18% CP, 20% CP and 16% CP respectively. Feed consumption increased with an increase in dietary crude protein. Body weight at first egg was highest (P= .05) among birds fed with diets containing 22% crude protein (CP) and lowest in 16% crude protein (CP). Birds fed with diets containing 20% and 22% crude protein (CP) had the highest (P= .05) hen-day and hen- house egg production, whiles 16% crude protein (CP) diet recorded the lowest. It was concluded that body weight, body weight gain and total feed intake of indigenous Guinea fowls increased with increasing dietary crude protein. It is recommended to farmers that, diets containing 22% crude protein (CP) is ideal for optimum productivity of indigenous Guinea fowls.

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.

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