Limits...
The Optimum Feeding Frequency in Growing Korean Rockfish (Sebastes schlegeli) Rearing at the Temperature of 15°C and 19°C.

Mizanur RM, Bai SC - Asian-australas. J. Anim. Sci. (2014)

Bottom Line: Fish were fed at the rate of 1.2% body weight (BW)/d at 15°C and 1.5% BW/d at 19°C.The results indicate that growing Korean rockfish 92 and 100 g perform better at 15°C than 19°C water temperature.As we expected, current results have indicated that a feeding frequency of 1 meal a day is optimal for the improvement of weight gain in growing Korean rockfish grown from 92 g to 133 g at 15°C and 100 g to 132 g at 19°C water temperature.

View Article: PubMed Central - PubMed

Affiliation: Department of Marine Bio-Materials and Aquaculture/Feeds and Foods Nutrition Research Center, Pukyong National University, Busan 608-737, Korea ; Member of Bangladesh Civil Service (Economic) Cadre, Planning Commission, Ministry of Planning, Dhaka 1207, Bangladesh .

ABSTRACT
Two feeding trials were conducted to determine the optimum feeding frequency in growing Korean rockfish, (Sebastes schlegeli) reared at the temperatures of 15°C and 19°C. Fish averaging 92.2±0.7 g (mean±standard deviation [SD]) at 15.0±0.5°C and 100.2±0.4 g (mean±SD) at 19.0±0.5°C water temperature were randomly distributed into each of 15 indoor tanks containing 250-L sea water from a semi-recirculation system. A total of five feeding frequency groups were set up in three replicates as follows: one meal in a day at 08:00 hour, two meals a day at 08:00 and 17:00 hours, three meals a day at 08:00, 14:00, and 20:00 hours, four meals a day at 08:00, 12:00, 16:00, and 20:00 hours, and one meal every 2 days at 08:00 hour. Fish were fed at the rate of 1.2% body weight (BW)/d at 15°C and 1.5% BW/d at 19°C. At the end of 8 wks of feeding trial weight gain and specific growth rate were significantly higher at the fish fed groups of one meal a day and two meals a day at 15°C and fish fed groups of 1 meal every 2 days at 19°C were significantly lower than those of all other fish fed groups. Glutamic oxaloacetic transaminase and glutamic pyruvic transaminase of fish fed group at 1 meal every 2 days was significantly higher than those of all other fish fed groups in both experiments. Weight gain, specific growth rate and condition factor were gradually decreased as the feeding frequency increased. The results indicate that growing Korean rockfish 92 and 100 g perform better at 15°C than 19°C water temperature. As we expected, current results have indicated that a feeding frequency of 1 meal a day is optimal for the improvement of weight gain in growing Korean rockfish grown from 92 g to 133 g at 15°C and 100 g to 132 g at 19°C water temperature.

No MeSH data available.


Related in: MedlinePlus

Weight gain of rockfish with different feeding frequencies at 15°C and 19°C.
© Copyright Policy
Related In: Results  -  Collection

License
getmorefigures.php?uid=PMC4150199&req=5

f1-ajas-27-9-1319: Weight gain of rockfish with different feeding frequencies at 15°C and 19°C.

Mentions: In the present study, WG and SGR at 1 meal a day and 2 meals a day were significantly higher than all other fish feeding frequency groups in 15°C and at the fish fed group of 1 meal every 2 days was significantly lower in both 15 and 19°C experiments. Weight gain and SGR were gradually decreased with the increasing of feeding frequency in both experiments (Tables 1 and 3). Growth performance was comparatively higher at 15°C than 19°C experiment (Figure 1). Fish growth was not significantly enhanced by increasing the number of meals from 2 to 4 meals per day. Because when the feeding frequency high or the intervals between meals is short, the food passes through the digestive tract more quickly, resulting in less effective digestion. This agreement also well established with some previous research findings reported by Van Ham et al. (2003) and Biswas et al. (2010). Feed efficiency and PER of fish fed at 1 meal a day and 2 meals a day were significantly higher than fish fed groups of 3 meals a day and 4 meals a day. Because, fish tend to optimize their digestion to extract nutrients more efficiently at the optimum feeding rate (Van Ham et al., 2003). Feed consumption and growth increased linearly with an increase in the feeding frequency up to a certain level in juvenile black sea turbot (Aydin et al., 2011). Over-feeding not only reduces the feed conversion efficiency, but also accumulates lots of waste that adversely affects the water quality (Biswas et al., 2006). Our previous study described that after the optimum feeding, fish could not efficiently utilize additional feeds, leading to the drop in FE and PER in juvenile Korean rockfish (Mizanur and Bai, 2014; Mizanur et al., 2014a,b) and juvenile olive flounder (Okorie et al., 2013).


The Optimum Feeding Frequency in Growing Korean Rockfish (Sebastes schlegeli) Rearing at the Temperature of 15°C and 19°C.

Mizanur RM, Bai SC - Asian-australas. J. Anim. Sci. (2014)

Weight gain of rockfish with different feeding frequencies at 15°C and 19°C.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4150199&req=5

f1-ajas-27-9-1319: Weight gain of rockfish with different feeding frequencies at 15°C and 19°C.
Mentions: In the present study, WG and SGR at 1 meal a day and 2 meals a day were significantly higher than all other fish feeding frequency groups in 15°C and at the fish fed group of 1 meal every 2 days was significantly lower in both 15 and 19°C experiments. Weight gain and SGR were gradually decreased with the increasing of feeding frequency in both experiments (Tables 1 and 3). Growth performance was comparatively higher at 15°C than 19°C experiment (Figure 1). Fish growth was not significantly enhanced by increasing the number of meals from 2 to 4 meals per day. Because when the feeding frequency high or the intervals between meals is short, the food passes through the digestive tract more quickly, resulting in less effective digestion. This agreement also well established with some previous research findings reported by Van Ham et al. (2003) and Biswas et al. (2010). Feed efficiency and PER of fish fed at 1 meal a day and 2 meals a day were significantly higher than fish fed groups of 3 meals a day and 4 meals a day. Because, fish tend to optimize their digestion to extract nutrients more efficiently at the optimum feeding rate (Van Ham et al., 2003). Feed consumption and growth increased linearly with an increase in the feeding frequency up to a certain level in juvenile black sea turbot (Aydin et al., 2011). Over-feeding not only reduces the feed conversion efficiency, but also accumulates lots of waste that adversely affects the water quality (Biswas et al., 2006). Our previous study described that after the optimum feeding, fish could not efficiently utilize additional feeds, leading to the drop in FE and PER in juvenile Korean rockfish (Mizanur and Bai, 2014; Mizanur et al., 2014a,b) and juvenile olive flounder (Okorie et al., 2013).

Bottom Line: Fish were fed at the rate of 1.2% body weight (BW)/d at 15°C and 1.5% BW/d at 19°C.The results indicate that growing Korean rockfish 92 and 100 g perform better at 15°C than 19°C water temperature.As we expected, current results have indicated that a feeding frequency of 1 meal a day is optimal for the improvement of weight gain in growing Korean rockfish grown from 92 g to 133 g at 15°C and 100 g to 132 g at 19°C water temperature.

View Article: PubMed Central - PubMed

Affiliation: Department of Marine Bio-Materials and Aquaculture/Feeds and Foods Nutrition Research Center, Pukyong National University, Busan 608-737, Korea ; Member of Bangladesh Civil Service (Economic) Cadre, Planning Commission, Ministry of Planning, Dhaka 1207, Bangladesh .

ABSTRACT
Two feeding trials were conducted to determine the optimum feeding frequency in growing Korean rockfish, (Sebastes schlegeli) reared at the temperatures of 15°C and 19°C. Fish averaging 92.2±0.7 g (mean±standard deviation [SD]) at 15.0±0.5°C and 100.2±0.4 g (mean±SD) at 19.0±0.5°C water temperature were randomly distributed into each of 15 indoor tanks containing 250-L sea water from a semi-recirculation system. A total of five feeding frequency groups were set up in three replicates as follows: one meal in a day at 08:00 hour, two meals a day at 08:00 and 17:00 hours, three meals a day at 08:00, 14:00, and 20:00 hours, four meals a day at 08:00, 12:00, 16:00, and 20:00 hours, and one meal every 2 days at 08:00 hour. Fish were fed at the rate of 1.2% body weight (BW)/d at 15°C and 1.5% BW/d at 19°C. At the end of 8 wks of feeding trial weight gain and specific growth rate were significantly higher at the fish fed groups of one meal a day and two meals a day at 15°C and fish fed groups of 1 meal every 2 days at 19°C were significantly lower than those of all other fish fed groups. Glutamic oxaloacetic transaminase and glutamic pyruvic transaminase of fish fed group at 1 meal every 2 days was significantly higher than those of all other fish fed groups in both experiments. Weight gain, specific growth rate and condition factor were gradually decreased as the feeding frequency increased. The results indicate that growing Korean rockfish 92 and 100 g perform better at 15°C than 19°C water temperature. As we expected, current results have indicated that a feeding frequency of 1 meal a day is optimal for the improvement of weight gain in growing Korean rockfish grown from 92 g to 133 g at 15°C and 100 g to 132 g at 19°C water temperature.

No MeSH data available.


Related in: MedlinePlus