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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

Glutamic oxaloacetic transaminase of rockfish with different feeding frequencies at 15°C and 19°C.
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f4-ajas-27-9-1319: Glutamic oxaloacetic transaminase of rockfish with different feeding frequencies at 15°C and 19°C.

Mentions: Plasma transaminase enzymes aspartate aminotransferase and alanine aminotransferase are formerly called GOT and GPT respectively. Serum GPT and GOT ratio provide useful information regarding the extent and causes of liver disease of olive flounder (Qiao et al., 2012). In the present study, serological characteristics of growing Korean rockfish were affected by different feeding frequencies. Serum GPT and GOT were increased with the increasing of feeding frequency in both experiments of 15°C and 19°C. In the present study, GPT and GOT were comparatively lower at 15°C than 19°C experiment (Figures 3 and 4). Environmental temperature is one of the most important ecological factors which also influence the behavior and physiological process of aquatic animals (Xia and Li, 2010). Glutamic pyruvic transaminase and GOT of fish fed group at 1 meal every 2 days was significantly higher and fish fed group at 1meal a day was significantly lower in both experiments. The reason for this observation may be attributed to the fact that Korean rockfish was might be always hungry and under feeding stressed conditions in 1 meal every 2 days group. Generally, in a stressful and unfavorable environmental condition GPT and GOT increase in blood serum. Serum GPT and GOT were gradually increased with the decreasing of feeding ration in juvenile Korean rockfish (Mizanur et al., 2014a,b) and olive flounder (Cho et al., 2007) due to the stress of under feeding condition.


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)

Glutamic oxaloacetic transaminase 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

f4-ajas-27-9-1319: Glutamic oxaloacetic transaminase of rockfish with different feeding frequencies at 15°C and 19°C.
Mentions: Plasma transaminase enzymes aspartate aminotransferase and alanine aminotransferase are formerly called GOT and GPT respectively. Serum GPT and GOT ratio provide useful information regarding the extent and causes of liver disease of olive flounder (Qiao et al., 2012). In the present study, serological characteristics of growing Korean rockfish were affected by different feeding frequencies. Serum GPT and GOT were increased with the increasing of feeding frequency in both experiments of 15°C and 19°C. In the present study, GPT and GOT were comparatively lower at 15°C than 19°C experiment (Figures 3 and 4). Environmental temperature is one of the most important ecological factors which also influence the behavior and physiological process of aquatic animals (Xia and Li, 2010). Glutamic pyruvic transaminase and GOT of fish fed group at 1 meal every 2 days was significantly higher and fish fed group at 1meal a day was significantly lower in both experiments. The reason for this observation may be attributed to the fact that Korean rockfish was might be always hungry and under feeding stressed conditions in 1 meal every 2 days group. Generally, in a stressful and unfavorable environmental condition GPT and GOT increase in blood serum. Serum GPT and GOT were gradually increased with the decreasing of feeding ration in juvenile Korean rockfish (Mizanur et al., 2014a,b) and olive flounder (Cho et al., 2007) due to the stress of under feeding condition.

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