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All Journal Indonesian Aquaculture Journal Jurnal Riset Akuakultur Media Akuakultur

Vitas Atmadi Prakoso

Institute for Freshwater Aquaculture Research and Development, Center for Fisheries Research and Development

Author-ID : 3672416

Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Environmental Science

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COMPENSATORY GROWTH OF Oreochromis niloticus SELECTED STRAIN FROM BOGOR, WEST JAVA Vitas Atmadi Prakoso; Kurniawan Kurniawan
Indonesian Aquaculture Journal Vol 12, No 2 (2017): (December, 2017)
Publisher : Center for Fisheries Research, Agency for Marine and Fisheries Research and Human Resource

Inefficient feed management strategy in aquaculture will increase the fish production cost. One of the most effective strategies to solve this problem is through a better understanding of the compensatory growth of cultured fish. O. niloticus BEST tilapia strain (total length: 7.23 ± 0.11 cm mean ± SD; Body weight: 7.04 ± 0.08 g mean ± SD) were reared in aquariums at 26.3 ± 1.4oC for 10 weeks. During the experiment, the control group was fed twice a day. The other two groups were deprived of food for one and two weeks and then fed twice a day during refeeding period. At the end of the experiment, the fish deprived for one week had a body weight, biomass and specific growth rate that were not significantly different from the control group. The body weight, biomass and specific growth rate of fish deprived for two weeks were significantly lower than the other groups. This study revealed that concentrations of ash and lower concentrations of protein and lipid on the deprived groups were higher compared to those without feed deprivation. Mortality of fish was lower than 9% and not significantly different among the treatments. Fish aggressive behavior was the main reason for injuries and death. Given the results, BEST tilapia strain was only able to reach complete growth compensation not longer than one week deprivation period. The results of the present study could be applied as basic information for further research on feeding management of BEST tilapia strain.

GROWTH PERFORMANCE OF DOMESTICATED ASIAN REDTAIL CATFISH Hemibagrus nemurus FINGERLINGS REARED AT DIFFERENT STOCKING DENSITIES Otong Zenal Arifin; Vitas Atmadi Prakoso; Endang Haris Suhud; Jojo Subagja
Indonesian Aquaculture Journal Vol 15, No 1 (2020): (June, 2020)
Publisher : Center for Fisheries Research, Agency for Marine and Fisheries Research and Human Resource

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15578/iaj.15.1.2020.1-6

Asian redtail catfish Hemibagrus nemurus is one of the prospective aquaculture commodities in Indonesia. However, there are still shortcomings in completing the domestication of this species. As such, this study was conducted to observe the growth of Asian redtail catfish at different stocking densities. Fish (body weight (BW) of 21.62 ± 0.57 g) were stocked in nine different floating nets (dimension: 2 m x 2 m x 1 m) inside a concrete pond (40 m x 20 m) with three stocking density treatments (10, 15, and 20 fish/m3). Each treatment consisted of three replicates. Growth data were collected every 30 days during 120 days of rearing period which included weight gain (WG), specific growth rate in body weight (SGRBW), average daily growth (ADGBW), biomass gain (BG), feed conversion ratio (FCR), and survival rate (SR). Measured water quality parameters during the experiment consisted of temperature, pH, and dissolved oxygen. The results showed that the best growth performance was achieved by fish at the stocking density of 15 fish/m3 compared to that of fish with the stocking density of 10 and 20 fish/m3. The FCR value of fish at the stocking density of 15 fish/m3 was also significantly better than those of 10 fish/m3 and 20 fish/m3 (P<0.05). The survival rate in each treatment was not significantly different (P>0.05). This study suggests that the optimal stocking density for Asian redtail catfish fingerlings is 15 fish/m3, beyond that value, growth reduction might be expected. Further research is needed to observe its optimal stocking density in different culture systems.

EFFECTS OF DIFFERENT SALINITY LEVELS ON PHYSIOLOGICAL AND HEMATOLOGICAL RESPONSE OF ROCK BREAM Oplegnathus fasciatus Vitas Atmadi Prakoso; Jun Hyung Ryu; Byung Hwa Min; Rudhy Gustiano; Young Jin Chang
Indonesian Aquaculture Journal Vol 11, No 2 (2016): (December, 2016)
Publisher : Center for Fisheries Research, Agency for Marine and Fisheries Research and Human Resource

Rock bream Oplegnathus fasciatus is one of economically important marine fish species in East Asia. However, lack of information about the salinity tolerance of rock bream related to its physiological response made this issue were needed to be studied. The present study was conducted to determine the effects of different salinity levels on physiological and hematological response of rock bream in order to obtain its salinity tolerance. Twelve rock breams (total length: 26.9 ± 0.6 cm, body weight: 477.3 ± 61.9 g) were used for experiments. Four experimental groups with three replications were conducted to measure the effects of salinity (5, 15, 25, and 35 practical salinity unit (psu)) on physiological and hematological response of rock bream. Fish were stocked into the chamber inside the closed recirculation system. At the end of each experiment, blood samples were collected. The study revealed that lower salinity exposure had tendency to decrease the physical and chemical properties of blood in rock bream. The value of Na+, Cl-, Ca, Mg, and osmolality showed tendency to decrease with lowering salinity, while cortisol and glucose showed tendency to increase from 35 psu to low salinity environment, indicating the enhancement of fish stress and resulted in fish mortality at 5 psu. The lowest cortisol value was 76.3 ng/mL in 25 psu, and the highest value was 188.8 ng/mL in 5 psu. Meanwhile, the lowest glucose value was 35.3 mg/dL and the highest value was 166.7 mg/dL (P<0.05). Results indicate that rock bream could tolerate lower salinity up to 15 psu.

EFFECT OF STOCKING DENSITY ON GROWTH PERFORMANCE OF DOMESTICATED BARB (Barbonymus balleroides) Otong Zenal Arifin; Jojo Subagja; Vitas Atmadi Prakoso; Endang Haris Suhud
Indonesian Aquaculture Journal Vol 12, No 1 (2017): (June 2017)
Publisher : Center for Fisheries Research, Agency for Marine and Fisheries Research and Human Resource

Barb (Barbonymus balleroides) considerably has economic potential as aquaculture commodity. However, there was still lack of development on aquaculture for this species. This study was conducted to observe the effect of different stocking density on growth of barb. The fish (body weight: 14.89 ± 0.13 g) were stocked in nine floating nets (dimension: 2 m x 2 m x 1 m) inside the concrete ponds with three stocking density treatments (10, 15, and 20 fish/m3). Each treatment consisted of three replications. Fish were fed on commercial pellet (30% of crude protein) as much as 3% of the biomass per day with twice a day of feeding frequency. Data of growth performances (body weight, specific growth rate, average daily growth, biomass, food conversion ratio, and survival rate) were collected every 30 days during 90 days of rearing period. Water quality variables (temperature, pH, and dissolved oxygen) were observed during experiment. The results showed that the optimal stocking density for the growth of barb was 10 fish/m3. Best value of food conversion ratio was found 10 fish/m3 compared with 15 and 20 fish/m3 (P<0.05). Meanwhile, there were no significant differences on survival rate between treatments. These results also showed the potential of rearing barb on culture ponds with appropriate stocking density.

METABOLIC RATES (SMR, RMR, AMR, AND MMR) OF Oplegnathus fasciatus ON DIFFERENT TEMPERATURE AND SALINITY SETTINGS Vitas Atmadi Prakoso; Young Jin Chang
Indonesian Aquaculture Journal Vol 13, No 1 (2018): (June, 2018)
Publisher : Center for Fisheries Research, Agency for Marine and Fisheries Research and Human Resource

The metabolic rate of aquatic animals is closely related to oxygen concentration and influenced by internal and external factors. Despite its high value as marine fish species in South Korea, information on rock bream Oplegnathus fasciatus metabolism is scarcely available. This study observed the standard metabolic rate (SMR), routine metabolic rate (RMR), and active metabolic rate (AMR) of rock bream Oplegnathus fasciatus subjected to different temperature settings. Another observation was performed to find out the maximum metabolic rate (MMR) on rock bream subjected to different salinity settings. Fish (TL: 26.86 ± 0.29 cm and BW: 469.40 ± 38.21 g for SMR, RMR, and AMR measurement; TL: 26.7 ± 0.4 cm and BW: 451.0 ± 44.4 g for MMR measurement) were observed using respirometer (dimension = 30 cm × 20 cm × 20 cm; volume: 10.4 L) inside a recirculation systems. SMR, RMR, and AMR were measured at 15°C, 20°C, and 25°C. Meanwhile, MMR was measured at 15, 25, and 35 psu. The results showed that SMR, RMR, and AMR increased linearly by increasing the temperatures (SMR: 58.7 ± 3.2, 102.7 ± 4.3, and 157.1 ± 4.1 mg O2/kg/h at 15°C, 20°C, and 25°C, respectively; RMR: 66.0 ± 8.6, 112.6 ± 10.2, and 175.2 ± 21.3 mg O2/kg/h at 15°C, 20°C, and 25°C, respectively; AMR: 73.4 ± 7.4, 122.0 ± 6.3, and 196.7 ± 15.4 mg O2/kg/h at 15°C, 20°C, and 25°C, respectively), whilst MMR decreased by lowering salinity (48.5 ± 5.2, 61.1 ± 5.5, and 89.3 ± 14.7 mg O2/kg/hour at salinity of 15, 25, and 35 psu, respectively).

Co-Authors Anang Hari Kristanto Byung Hwa Min Endang Haris Suhud Endang Haris Suhud Fera Permata Putri Irin Iriana Kusmini Jojo Subagja Jun Hyung Ryu Kurniawan Kurniawan Mas Tri Djoko Sunarno Muhamad Hunaina Fariduddin Ath-thar Muhammad Hunaina Fariduddin Ath-thar Otong Zenal Arifin Rudhy Gustiano Rudhy Gustiano Young Jin Chang Young Jin Chang Young Jin Chang

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