Feeding rate and frequency on juvenile pompano growth

Two experiments were carried out at the Khon Kaen University, Nong Khai Campus, Thailand during November, 2011 to May, 2012 to search for the most appropriate rates of feeding rations for fingerling and juvenile Asian redtail catfish (Hemibagrus wyckioides). A Completely Randomized Design (CRD) with three replications was used for both experiments. Experiment 1 had four treatments, i.e., T1 (2%), T2 (3%), T3 (4%, control), and T4 (5%). The same experimental design was used for the experiment 2, where four treatments were used, i.e., T1 (1%), T2 (2%), T3 (3%, control) and T4 (4%). The percentages of the amounts of rations used for Experiments 1 and 2 were based on body-live weight per day. Fingerling and juvenile fish were used for the experiments 1 and 2, respectively. Each experiment was carried out for 10 weeks. The results showed that a rate of 5% body live weight per day for fingerling fish of T4 of experiment 1 is the most appropriate rate for the fingerling fish. An increase in ration rate highly increased final body live weight. For juvenile fish of the experiment 2, it was found that there were no significant differences in live weights amongst the treated fish yet weight gained and specific growth rates between T1 and the rest were highly significant, whereas the results of the juvenile fish of T2 up to T4 were similar hence, 2% body live weight per day of T2 is the most appropriate rate for juvenile fish.

This study aims to evaluate various cyclic feeding regimes in milkfish (Chanos chanos) juveniles whether or not compensatory growth (CG) could be elicited that could improve growth, feed efficiency, body composition or any combination of these three responses. Fish were assigned randomly to five feeding regimes, namely, a control (C), fed continuously, one day fasting followed by 6 days refeeding (1:6, days starved: days fed), 2:5, 5:23, or 7:21 cyclic feeding. Fish in 1:6 and 2:5 groups were exposed to 8 cycles while 5:23 and 7:21 groups for 2 cycles throughout the 56 days of experiment period. Milkfish juveniles fed continuously without fasting (control group) exhibited statistically similar mean weight with those offered the 1:6 and 2:5 feeding regimens while those in the 7:21 group significantly exhibited the lowest mean weight and consistently sustained the lowest values until the termination of the experiment. Specific growth rate (SGR) of milkfish fed the control regimen and those fed under 1:6 and 2:5 feeding regimes exhibited significantly higher than in those fasted for 5 or 7 days and refed (i.e. 5:23 and 7:21, respectively). Food conversion ratio (FCR) and Protein efficiency ratio (PER) values were significantly the best in milkfish offered the 2:5 feeding regimen while those of fish offered the control regimen and the rest of the cycled fed fish exhibited lower values but were statistically similar to each other. Survival rate, condition factor (CF), hepatosomatic index (HIS), and viscero-somatic index (VSI) were not influenced by the cyclic feeding regimes. In conclusion: cyclic feeding was successful in eliciting a CG response in milkfish fingerling under the experimental conditions of the present study. Fish offered the 2:5 cyclic feeding regimen resulted in statistically similar SGR with those in the control group and better overall FCR compared to other treatment and control groups of fish. Based on the results of this study, complete growth compensation could be elicited in 1:6 and 2:5 cyclic feeding regimen.

Asian Journal of Fisheries and Aquatic Research, 2023

The objective of the study was to determine the effect of feeding ration on the growth and survival of Oreochromis niloticus. Three experimental hapas (T1, T2 and T3) were studied for a total of 8 weeks. The hapas had a rectangular shape and the same size (0.0725 decimal). In each of the three experimental conditions, 420 fish/decimal were stocked. The fish were fed 8% of their body weight in T2 and 12% of their body weight in T3. In T1, the fish were reliant on food that occurred naturally in their environment. In T2 and T3, fishes were fed twice daily. The proximate composition of the experimental diet was as follows: 11% water, 30% protein, 6% fat, 10% ash, and 7% fiber. Throughout the trial period, it was determined that the range of water quality parameters (water temperature 28-32°C, dissolved oxygen 5.6-7.8 mg/l, and water pH 7.5-8.6) were suitable for Tilapia culture. The initial mean weight of Tilapia fry in each of the three treatments was 3g, and their final mean weight gain was 6.8±4.77 g for T1, 9.88±5.76 g for T2 and 19.2±9.9 g for T3, respectively. The average initial length for the three treatments was 5 cm, and the average final length gain was 8.2±6.15 cm, 9.86±7.36 cm, and 12.2±8.23 cm for T1, T2 and T3, respectively. The T3 group, which was fed at a rate of 12% of body weight, attained the highest length and weight, whereas the T1 group, with no supplemental nutrition revealed the least gain in terms of length and weight.

Can Tho University Journal of Science, 2021

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 > ...

Aquaculture, 1997

Aquaculture International, 2000

Journal of FisheriesSciences.com, 2011

The effects of feeding frequency on growth performance, feed efficiency and size variation of juvenile Black Sea turbot, Psetta maxima were investigated. A factorial design of two feeding rates (ad libitum, n=240, weight=23.8 ±0.70 g and total length=11.0 ±0.09 cm; and 1% of bodyweight of fish per meal, n=240, weight=38.6 ±0.45 g and total length=13.0 ±0.03 cm) and three feeding frequencies (one meal in 2 days, one meal a day, two meals a day) with two replicates of each treatment combination were applied in this experiment. Feeding frequencies did not affect fish survival rates (P>0.05). The final body weight and specific growth rate (SGR) were higher in group one meal a day at both feeding rates. There were no significant differences the final body weight and SGR values among the groups (P>0.05). Similar responses were observed for condition factor, feed conversion ratio (FCR) and body weight increase (BWI), and the best FCR and BWI were obtained in the same group. The coefficient of variations (CV) in fish weight increased between initial and final weightings in all replicate groups. However, the CV of fish weight was not significantly affected by feeding frequency (P>0.05). In conclusion, growth performance, SGR and FCR were better in once-daily feeding, and it appears that under the conditions of this experiment, feeding once a day to satiation was sufficient for maximal growth.

Tekirdağ Ziraat Fakültesi Dergisi, 2021

Ornamental fish farming has become an important industry in the world. Ornamental fish are called living gems because of their color, shape and behavior. Modern ornamental fish production requires a nutritionally balanced, cost-effective and sustainable feeding process. Among the operating costs in aquaculture, the cost of feed has a ratio varying between 40% and 60% among the total other expenses. In this study, it was aimed to investigate the effects of meal number on growth performance and survival rate in Electric yellow cichlid fries (Labidochromis caeruleus). 60 Electric yellow cichlid fries were stocked in 12 aquariums of 33 * 35 * 40 cm size established in Tekirdag Namık Kemal University Technical Sciences Vocational School Fisheries Laboratory. The study was carried out in 3 repetitions: 1 meal per day, 3 meals, 5 meals and 1 meal every other day, up to 5% of body weight, by applying 4 different meals to fish. During the study, weight and height measurements were made every...

Advances in Tropical Biodiversity and Environmental Sciences, 2021

Aquaculture is an activity to develop, obtain, reproduce and produce a fishery with the help of human resources. One of the cultivation practices is wader fish (Rashbora argyrotaenia) which is known for its very slow growth and relatively small size. This study aims to determine the growth rate of wader fish with different feeds in Blado Kulon Village, Tegalsiwalan, Probolinggo. The feed used was feed A in the form of fish pellets as a control, feed B consisting of a mixture of conch flour, soybean flour, bran, and tapioca flour, while feed C consisted of a mixture of conch flour, cassava leaf flour, bran and tapioca flour. The study was conducted for 42 days. The parameters measured in this study were temperature, DO, and pH, as well as observing the growth in absolute weight, specific growth rate (SGR), survival rate, and feed concentration ratio (FCR). Observations were analyzed using One Way Analysis of Variance (ANOVA) and further tests were carried out using the Duncan test. T...

Asian Journal of Fisheries and Aquatic Research, 2023

The study was conducted to assess the growth performance and feed conversion ratio (FCR) of Oreochromis niloticus fry reared in experimental ponds. A stocking density of 360 fish/decimal with three feeding frequency T1 (four times/day), T2 (three times/day) and T3 (two times/day) was maintained each with three replications. The fry was initially fed at 30% of their body weight and the rate was reduced up to 5% gradually at the final stage. The survival rate was 95.65±0.367, 93.00±0.709 and 90.50±0.707 % in T1, T2 and T3, respectively. The best FCR value was obtained in T1 (0.983±0.0057) and the significantly (p˂0.05) highest fish production was also observed in T1 (65.67±0.52 kg/dec/120 days). At the end of the experiment, the mean weight gain was recorded as 327.49±2.32, 294.55±0.87 and 244.72±2.33 g in T1, T2 and T3, respectively. The highest percent weight gain (%) was observed in T1 (5468.78±38.87) followed by T2 (5167.54±27.13) and T3 (4293.27±17.36). The specific growth rate (SGR) was also highest in T1 (3.48±0.03) while the lowest SGR was found in T3 (3.15±0.01%). The results revealed that feeding frequency effect positively on the growth performance of Tilapia.