How Is The Feed Conversion Ratio For Catfish Determined

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Growth Performance of the African Catfish, Clarias Gariepinus

various experimental units were determined. The standard length was determined with a graduated tape. Data on performance such as body weight changes, relative weight gain, specific growth rate, feed conversion ratio, condition factors Bagenal, [21] and survival percentage Fasakin et al., [22] were determined using the following formulae:

Comparative Performance of African Catfish (Clarias

percentage survival was higher in larvae fish fed with special feed than Artemia. Moreover, in terms of nutrient utilization between the two feeds, special feed had a better feed conversion ratio of 1.33, while Artemia had 1.87. It is concluded based on the findings from this work that special formulated feed is suitable in first feeding of

Feeding Frequency on Growth and Feed Conversion of Clarias

different (P < 0.05). The highest feed consumption was observed in the fish fed 4times daily and d feed conversion ratio recorded the lowest in 2 time feeding daily. The results of this experiment indicate that fish could be fed 4times daily with maximum growth. Keywords: Feeding frequency, feed conversion, growth, Clarias gariepinus.

Effects of Water Level on Growth, Nutrient Utilization and

parameters were determined according to the procedures described by American Public Health Association (1992). 2.2. Growth Parameters of the Fish Growth parameters such as mean weight gain (MWG), specific growth rate (SGR), feed conversion ratio (FCR), Survival rate (SR) and protein efficiency ratio (PER) were

Replacement of fish meal with maggot meal in African catfish

utilization indices (weight gain, length gain, daily growth rate, specific growth rate, feed conversion ratio and protein efficiency ratio). It is concluded that maggot meal is a viable alternative protein source to fish meal in the diet of African catfish.

Growth hormone transgenesis and feed composition influence

was fed as a control to non-transgenic catfish. Feed efficiency, including feed conversion ratio and protein use efficiency (i.e., protein retention and protein productive value), was assessed. Feed efficiency, protein content, and essential amino acid content in G 3 transgenic catfish (feed A and B) were higher than in non-transgenic fish

Growth performance of the African catfish, Clarias gariepinus

determined with an electronic scale of model KERN 572, the Standard Length was determined with a measuring board. The experimental tanks were inspected daily to remove dead fish, if any. Fish weight gain, feed conversion ratio, specific growth rate and mortality were determined as follows. The

Growth and immunity of African catfish (Clarias gariepinus

Growth parameters of African catfish (Clarias gariepinus) juveniles fed with ginger and turmeric extract (% feed) for 40 days Ginger Turmeric Treatment (g kg-1 of feed) Weight gain (g) Feed Conversion Ratio Treatment (g kg-1 of feed) Weight gain (g) Feed Conversion Ratio Control 9.51±0.71a 4.93±0.40a Control 8.28±0.24c 3.21±0.16a

Journal of the Indian Fisheries Association 105

Daily growth rate was determined as DGR = MF - Mi/t Mi x 100, where Mi and MF are the mean initial and final individual weights, and t is the duration of the experimental period in days. Feed conversion ratio and protein efficiency ratio were calculated using the following formulae: FCR = Weight of feed consumed/fish weight gain and

Suitability of Three Commercial Clarias fuscus in

weight of feed in grams (Table 3). The feed conversion ratio (FCR) of each tank was calculated by dividing the total weight of feed by the net production (final weight minus the starting weight) (Table 3 and Figure 2). Figure 3 shows the food conversion ratios of

(NWAC103 Strain) Blue Catfish, , F Hybrid

Feed conversion ratio (feed/gain) Estimated survival1 (%) NWAC 1033 Hybrid4 Pooled SEM5 10,759b 13,998a 281 5,258b 7,593a 168 838b 1,012a 24.7 420b 552a 14.9 1.99a 1.84b 0.03 85.4b 93.8a 4.0 1 Estimate based on weight of a 500-fish sample per pond. 2 Mean initial weight was 24.9 g/fish for NWAC 103 strain of channel catfish and 31.8 g/fish for


Conversion Ratio (FCR). Depending on management efficiency, it takes 1-1/2 to 2 lb of catfish feed to produce 1 lb of fish (FCR = 1.5 to 2.0). Feed Storage Catfish feed should be stored in a cool, dry place. Heat, moisture and long term storage (greater than 3 months) may produce rancid oils and can destroy vitamins. Feeds should not be

PAPER OPEN ACCESS The growth, protein content, and fatty acid

May 15, 2020 and feed conversion ratio of catfish. On the other hand, the feed treatment did not give significant effect (P>0.05) on the survival rate of the pangasius catfish. Table 2. Specific growth rates (SGR), feed efficiency (FE), feed conversion ratio (FCR), and survival rate (SR) of pangasius catfish.


Jun 01, 2005 feed conversion ratio (FCR) of 1:1 and by sampling every 2 weeks. Ponds were aerated 10 h nightly (2200 0800 hours) with 0.37-kW aerators. Secchi disk visibility was measured every 2 weeks, and total ammonia nitrogen, pH, chlorophyll a, dissolved oxygen and zooplankton were determined monthly. Ponds were harvested November 19-20 after 80 days.

Effect of different feed on growth, survival and production

treatments. The feed conversion ratio (FCR) values ranged from 2.52-6.4. Survival rate of fish varied between 83 and 96%. Treatment II yielded the highest (5000 kg/ha/120 days) production with the highest survival rate of fish. On the basis of survival rate and

Breadwaste as a Dietary Supplement for Maize in the Practical

Similar observation was recorded for feed intake but there was no significant (p>0.05) difference in feed conversion ratio among the treatments. All the fish fed the test ingredients performed better than the control group; hence, bread waste meal could be recommended as a dietary supplement in the diets of African giant catfish.

Growth Response of African Catfish (Clarias gariepinus) Fed

The feed conversion ratio (FCR) was expressed as the proportion of dry food fed per unit live weight gain of fish (Reay 1979). FCR = ( ) ( ) Dry feed fed g Live weiht gain g (Brown, 2002). Gross Feed Conversion Efficiency (GFCE) The gross feed conversion efficiency was calculated according to Stickney (1980), as a percentage of the reciprocal

Effects of feeding frequency on growth, feed efficiency and

Feed conversion ratio (FCR) = total feed intake (g)/total wet weight gain (g). Where W f refers to the mean final weight, W i is the mean initial weight of fish and T is the feeding trial period in days. Protein Efficiency Ratio (PER) = wet weight gain (g)/total protein intake. The costs were based on the current cost of feed ingredients in

Effects of feeding levels on growth performance, feed

The amount of the daily feed intake and presentation of the predetermined ration are the key factors of feed management strategies, influencing the growth and feed conversion (Jobling, 1995; Goddard, 1995). Optimal feeding frequency may vary depending on species, age, size, environmental factors, husbandry and feed quality

PROJECT TITLE: Evaluation of Probiotic and Prebiotic

approaching 1 1 pound (454 g). Weight gain, feed conversion ratio and survival of fish fed the various diets were not significantly influenced by the dietary treatments (insert Table 5 here). Although only five dead fish were recovered from all of the ponds throughout the feeding trial, survival at the end of the trial was only around 70%.


The sum of the daily feed intake, rate and time of feedings and presentation of the encoded ration are the major factors in feed management that influence the growth and feed conversion ratio (Jobling, 1995; Goddard, 1995). Feeding fish at a suitable frequency would enhance their growth and survival because their feed

Use of Corn Gluten Feed in Catfish Feeds

gain, feed conversion ratio, survival, or fillet protein concentration among fish fed the test diets. The fish gained on average about one pound and feed conversion ratio was about 1.7 for all groups. Fish fed diets containing 25% and 50% CGF exhibited a lower level of visceral fat and a higher carcass yield than fish fed the control diet

Growth, feed utilization, survival and body composition of

feed conversion ratio, protein efficiency ratio, and specific growth rate were calculated. Six fish in each concrete tank were sampled and killed by overdose of tricaine methane-sulfonate (MS-222) for analysis of the condition factor. K= 100 Wt/L3, where Wt is body weight in g and L is total length

Feed Conversion Ratio for Pond-Raised Catfish

INTRODUCTION cientlydetermined animal convertsFeed an conversion ratio (FCR) is bodymeasure mass, of and effi-weight gain over some time interval (feed/gain). byby dividing the weightof feedCatfishgrown from fingerlings pounds)or less. Whilein research ponds routinely exhibit an FCR of 1.8:1to marketable size (about 1.5

Dietary Zinc and Cobalt Requirements of Fry of Seabass Lates

Feed was offered at the rate of 10% of the body weight (Singh et al., 2005) twice daily (10:00 and 16:00). Water (stored drinking water devoid of zinc and cobalt) was exchanged at a rate of 25% per day. The study was conducted for eight weeks. Percent weight gain and feed conversion ratio were determined weekly.

Effects of replacement of fishmeal with other alternative

containing fish meal) and D variant (catfish were fed with feed containing algae meal instead of fish meal) were measured at the start and at the end of trial. Feed conversion ratio was also calculated. The hydrochemical parameters (oxygen, pH, conductivity, ammonium, nitrite, nitrate and phosphate) were

Compensatory growth effects on previously starved fingerlings

Voluntary feed intake (VFI) (%) = 100 x FI / [(W + W f) × t] Where: W f refers to the mean final weight; W i is the mean initial weight of fish, and T is the feeding trial period in days. Feed conversion ratio (FCR) = Feed Intake (FI) (dry weight in g) /Fish wet weight gain (g) Protein efficiency ratio (PER) = Mean weight gain / Total Protein

Nutrition and Health Status of African Catfish Fed Yellow

Feed Conversion Ratio (FCR): FCR= Average Feed Intake (g)/ Mean weight gain (g) The following haematological parameters were determined: Packed cell volume (PCV), White blood cell (WBC), Red blood cell (RBC), Haemoglobin concentration (HB), Mean corpuscular volume (MCV), Mean


×100 and feed conversion ratio (FCR) = feed given (g)/body weight gain (g). The coefficient of variation (CV) of the final weight of the fish was also calculated to determine heterogeneity in sizes of the fish. Data Analysis All the experimental data including final mean weight, weight gain, SGR, FCR and survival rate,

Limiting Size of Fish Fillets at the Center of the Plate

The number of fish (top), the biomass (t ha−1, middle) and the cumulative feed conversion ratio (feed conversion ratio (FCR), bottom) for three species produced in aquaculture. Small fish production is indicated by triangles, medium fish by squares, and large fish by diamonds. X indicates harvests for each production scenario. 3.

Nutritive Value of the Carcass of African Catfish (Clarias

called the feed conversion ratio [24]. FCR = Total dry feed consumed (g) Total Wet weight gain (g) Protein Intake (PI) This is the numerical value of the quantity of protein present in the feed fed to the fish during the experimental periods and was determined following [25]method as follows:

Summary of Phytase Studies for Channel Catfish

Table 3. Mean feed consumption, weight gain, feed conversion ratio, survival, bone ash, and bone phosphorus of channel catfish fed diets containing different concentrations of fungal phytase for 70 days in aquaria in Experiment 1.1 Fungal Feed Weight Feed Survival Bone Bone Fecal phytase consumption gain conversion ash phosphorus phosphorus3

Effectiveness of Using Fish Herbs in Feed toThe Growth of

rate, feed conversion ratio and survival rate used analysis of variance (ANOVA) with a confidence level of 95%. The results showed that giving 200 ml of fish herbs to the feed resulted in a specific growth rate of 4.75%, survival rate 83% and feed conversion ratio 0.62.

Bluegill Feed Trials - Aquatic Environmental Services, Inc

to calculate the feed conversion ratio. The total feed added was calculated by multiplying (food added per day X number of days fed) The feed conversion ratio was then found by dividing pounds of food fed/pounds of weight gained. Purina Aquamax 500 Cargill Aquafeed 40-10 Cargill Aquafeed 45-12 Purina Gamechow Purina Gamechow Cargill Aquafeed

Effect of a Floating Feed Ring on Advanced Channel Catfish

pelleted feed (Mgbenka and Lovell 1984). However, feeding catfish floating feed in ponds can result in waste of feed due to wind action that carries the feed to pond banks where it become unavailable to the fish. Further, the uneaten feed can contribute to poor water quality that adversely affects fish growth and feed conversion ratio (FCR) (Wurts

Growth and expression level of growth hormone in transgenic

weight, feed conversion ratio (FCR), and analysis of CgGH mRNA expression in the offspring of G2 transgenic catfish was needed to determine the stability of transgenic inheritance. Thus, the target for this research was increased production in transgenic mutiara catfish aquaculture with stable inheritance of growth

Effects of Blue Tilapia/Channel Catfish Polyculture on

Commercial catfish farmers were facing difficulttimes in1982. Feed prices and energy costs wereextremely high, and pond-bank prices for channel catfish averaged only $0.55/pound, compared to the previous fiveyear average of$0.61 /pound (USDA National Agricultural Statistics Service, 1986). Many Arkansas catfish farmers were searching for ad-

A Practical Guide to Nutrition, Feeds, and Feeding of Catfish

Feb 11, 2009 Average feed consumption and feed conversion ratio for different sizes of catfish grown in 1.0-acre earthen ponds at DBES 20. Feed cost in cents per pound of catfish produced at different feed conversion ratios and feed prices 21. Winter feeding schedule for fingerling, growout, and brood catfish 22. Typical catfish winter feed and Romet

Quantitative Feed Requirements of African Catfish (CZarias

Quantitative Feed Requirements of African Catfish Growth performance was determined on the basis of growth rate, food conversion ratio, energy conversion efficiency, protein efficiency ratio