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Eri Setiadi
Research Institute for Freshwater Aquaculture, Bogor
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology

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FEEDING INCIDENCE, GROWTH AND SURVIVAL RATE IN THE EARLY STAGE OF THE RED-SPOTTED GROUPER, Epinephelus akaara, IN RELATION TO TANK COLOR Eri Setiadi
Indonesian Aquaculture Journal Vol 1, No 2 (2006): (December 2006)
Publisher : Center for Fisheries Research, Agency for Marine and Fisheries Research and Human Resource

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1445.204 KB) | DOI: 10.15578/iaj.1.2.2006.121-128

Abstract

The red-spotted grouper, Epinephelus akaara, is one of marine fish species targeted for mariculture in Japan. The artificial mass seedling production of these species has been largely successful. However, the survival is still unstable. The effect of tank colors on the feeding incidence, feeding proportion, growth and survival rates in the early stage of the red-spotted grouper were examined. The results showed the feeding incidence, feeding proportion, growth, and survival rates at different tank colors were highly significantly different (P<0.001). Post hoc multiple comparisons based on Tukey’s test showed significant differences (P<0.05) regarding feeding incidence between yellow (70.45%) compared to white (55.83%), black (48.42%), green (41.67%), blue (35.17%), and red (32.50%). The highest feeding proportion (number of rotifer in the stomach/larvae) was found at yellow (5.62), followed by white (2.47), black (1.97), green (1.92), blue (1.71), and red (1.28). The specific growth rate showed significant differences (P<0.05) were found at yellow (2.14%) and white (1.84%) compared to black (1.46%), green (1.20%), blue (1.15%), and red (1.13%). The survival rate at yellow color (1.22%) was the highest, followed by white (1.09%), black (0.79%), green (0.57%), blue (0.38%), and red (0.37%). Yellow was suitable as tank wall color for rearing of red-spotted grouper larvae.
IMPROVING WATER QUALITY AND PRODUCTIVITY OF TILAPIA (Oreochromis niloticus) USING CONSTRUCTED WETLAND Eri Setiadi; Lies Setijaningsih
Indonesian Aquaculture Journal Vol 6, No 2 (2011): (December 2011)
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.6.2.2011.107-122

Abstract

Organic and inorganic pollutants such as N, P, and heavy metals are a serious problem in water bodies (lake, reservoir, river, and stream) and have deleterious effects to pond productivity and human health. These pollutants produced from anthropogenic activities (i.e. industrial, agricultural, and settlement) are released into the water bodies and causing poor water quality. Constructed wetland (CW) is one of the technologies that have the capability to solve such problems. The purpose of this experiment was to examine the efficiency of constructed wetland in terms of reducing pollutants from the stream as a water resource for aquaculture area and increasing fish production. Two kinds of treatments were set up: one fish pond culture with constructed wetland and the other one without constructed wetland (control). Each treatment consisted of three replications. The result showed that water quality in the fish pond with CW was better than the control. Constructed wetland were able to reduce ammonia (NH3-N), nitrite (NO2-N), nitrate (NO3-N), TN, phosphate (PO4-P), TP, Cu, Pb, and As concentrations to 15.00%-88.27%, 9.52%-72.73%, 11.11%-57.14%, 20%-66.67%, 24.44%-80.77%, 12.04%-77.95%, 50.00%-100%, 56.25%-100%, and 46.83%-100%, respectively. Nile tilapia cultured in pond using CW was higher than the control in terms of total length, body weight, and survival rate. The t test revealed that nile tilapia (Oreochromis niloticus) cultured in pond with CW and the control has significant difference (P<0.01) in terms of total length, body weight, and survival rate. This is the evidence that constructed wetland technology is very useful on improving water quality and increasing pond productivity of nile tilapia cultured in the freshwaterpond.
OBSERVATION ON SKELETAL DEFORMITY IN HATCHERY-REARED RED SPOTTED GROUPER, Epinephelus akaara (Temmick et Schlegel) FROM LARVAL TO JUVENILE STAGE Eri Setiadi; Seiichi Tsumura
Indonesian Aquaculture Journal Vol 2, No 1 (2007): (June 2007)
Publisher : Center for Fisheries Research, Agency for Marine and Fisheries Research and Human Resource

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (202.89 KB) | DOI: 10.15578/iaj.2.1.2007.35-45

Abstract

Skeletal deformity is a significant problem in fish culture. The skeletal deformities in red spotted grouper from yolk-sac to juvenile stages were examined through clearing and staining of the cartilage and bone using Alcian Blue and Alizarin Red S. The overall results showed that the pattern of incidence of deformities showed an increase from preflexion to juvenile stages. The rate of deformities based on ten elements of bone from preflexion to juvenile stages were as follows: vertebral (42.6%—9.0%), dorsal proximal radials (4.8%—25.2%), neural spine (0%—8.4%), haemal spine (0%—6.8%), hypural (1.3%—5.4%), anal proximal radials (0%—5.4%), epural (1.3%—4.9%), arypural (2.0%—4.5%), lower jaw (1.3%—2.5%), and upper jaw (0%). Vertebral and dorsal proximal radials were recognized as the most susceptible parts to deformation. The main types of bone deformity were lordosis, scoliosis, fusion, shortening, branching, supernumerary elements, and saddleback syndrome. Development of saddleback syndrome was detected initially in preflexion stage, which was accompanied by deformity of the neural spines, dorsal proximal radials, and disposition of the distal radials and dorsal spines in later life stages. The skeletal deformity encountered during the larval rearing period could be caused by water surface tension.
Observation on gonad maturation of the first generation (F1) of humpback grouper, Cromileptes altivelis Tridjoko Tridjoko; Eri Setiadi; Suko Ismi; Fris Johnny
Indonesian Aquaculture Journal Vol 1, No 2 (2006): (December 2006)
Publisher : Center for Fisheries Research, Agency for Marine and Fisheries Research and Human Resource

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (750.761 KB) | DOI: 10.15578/iaj.1.2.2006.97-103

Abstract

The purpose of this experiment was to know gonad maturation and spawning frequency of the first generation in humpback grouper, Cromileptes altivelis. This experiment had two groups of feed types (A and B). Both groups were put in circular concrete tanks with water volume of 75 m3 each. Each tank was stocked 40 fishes with body weight of 500—1,000 g/fish and total length of 28—38 cm. Group (A) was fed with trash fish, squid, and vitamin mix, while group (B) was fed with artificial diet. Both groups were fed once a day, in the morning. The water was exchange continuously, of 300%—500% per day. The result showed the fish spawn after 31 months rearing. During the experiment, the range of water temperature and salinity were 28.4°C—31.7°C and 30.2—34.4 ppt, respectively.
Co-Authors Fris Johnny Lies Setijaningsih Seiichi Tsumura Suko Ismi Tridjoko Tridjoko