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All Journal Jurnal Ilmu dan Teknologi Kelautan Tropis Saintek Perikanan : Indonesian Journal of Fisheries Science and Technology JFMR (Journal of Fisheries and Marine Research)

Regina Melianawati

Unknown Affiliation

Author-ID : 2890539

Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Decision Sciences, Operations Research & Management Education Engineering Environmental Science Library & Information Science

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Articles

Title

THE GROWTH PATTERN OF BLACKSADDLED CORALGROUPER LARVAE (Plectropoma laevis LACEPÈDE, 1801) AND THEIR CONSUMPTION RATE TO ZOOPLANKTON ROTIFER (Brachionus rotundiformis) Regina Melianawati; Ni Wayan Widya Astuti; Bejo Slamet
Jurnal Ilmu dan Teknologi Kelautan Tropis Vol. 4 No. 2 (2012): Elektronik Jurnal Ilmu dan Teknologi Kelautan Tropis
Publisher : Department of Marine Science and Technology, Faculty of Fisheries and Marine Science, IPB University

Blacksaddled coralgrouper Plectropoma laevis has been started to conserve to prevent from over exploitation. The study purposes were to determine the growth pattern during larvae to juvenile stage of Blacksaddled coralgrouper and their consumption rate to zooplankton rotifers Brachionus rotundiformis. Domesticated broodstocks have been rearing in 100,000 l concrete tanks. The eggs from spawning broodstocks were hatched and the larvae have been kept to juvenile. Larvae rearing was done in 6,000 l concrete tanks. During the rearing period, larvae were fed with zooplankton rotifer, artemia and artificial food. Parameters measured were eggs and oil globule diameter, larval total length, length of larval dorsal fin and ventral fin, the number of zooplankton that consumed by larvae and water temperature. Microscopic method was used to measure the parameters. The result showed that eggs and oil globule diameter ranged in 800-850 μm and 168-200 μm, respectively. Total length of newly hatched larvae was 2.53±0.13 mm. The growth pattern of total length from larva to juvenile stage was exponential, while the growth pattern of dorsal fin and ventral fin length was linear. Larvae grew very fast after 35 days old. The pattern of larval consumption rate to zooplankton rotifers was linear. Time period from larvae to juvenile stage was 45-55 days on water temperature 27-29oC.Keywords: growth, consumption rate, rotifers, larvae, Blacksaddled coralgrouper

CULTURE OF EMPEROR SNAPPER Lutjanus sebae Regina Melianawati; Restiana Wisnu Aryati
Jurnal Ilmu dan Teknologi Kelautan Tropis Vol. 4 No. 1 (2012): Elektronik Jurnal Ilmu dan Teknologi Kelautan Tropis
Publisher : Department of Marine Science and Technology, Faculty of Fisheries and Marine Science, IPB University

Emperor snapper Lutjanus sebae is one of marine fishery commodities with high economic value, therefore capture rate of this fish is very high. To maintain its sustainability in nature, the culture of this species should be done in proper manner to support their conservation. This study was aimed to determine the culture technology of emperor snapper L. sebae. The eggs for this study was taken from wild broodstocks that have been domesticated in concrete rearing tank. Larval rearing was done in 500 liter polyethylene tank placed in hatchery. Phytoplankton Nannochloropsis oculata was used during larval rearing period. Larvae was fed with zooplanktons such as rotifer Brachionus rotundiformis and copepod Tisbe holothuriae in the beginning of rearing and artemia starting in day 16. Observed parameters were absorption of endogenous energy, preferrence of food, larval growth and survival rate. The result indicated that total length of newly hatched larvae were 2,44-2,63 mm, while yolk sac and oil globule were 179x10-3 - 183 x10-3 mm3 and 0,66x10-3 - 0,67x10-3 mm3, respectively. Yolk sac was absorbed at 60 hours after hatching, while oil globule almost totally absorbed at 80 hours after hatching. Live food rotifers were dominantly preferred by larvae until 10 days old, while copepods and artemia were preferred after 12 and 16 days. Larval rearing period was 22-29 days at water temperature 28.5-30.0°C. Survival rate of larvae were between 1.5 until 2.1%, while juveniles were 84.00-100.00%.Keywords: Emperor snapper, L. sebae, culture technology

PLANNING ON HATCHING TIME OF GROUPER EGGS THROUGH DIFFERENT INCUBATION TEMPERATURES Regina Melianawati; Philip Teguh Imanto; Made Suastika
Jurnal Ilmu dan Teknologi Kelautan Tropis Vol. 2 No. 2 (2010): Elektronik Jurnal Ilmu dan Teknologi Kelautan Tropis
Publisher : Department of Marine Science and Technology, Faculty of Fisheries and Marine Science, IPB University

Groupers were known as a high economically marine commodity and in order to support groupers production, the seed availability was the most important. Eggs are still as limited factor in hatchery production, for this reason the success of eggs transportation is one as base of successful production of seed. Planning on hatching time of eggs through different incubation temperature was an option to solve that problem. This experiment was aimed to find out the optimum temperature for groupers eggs and the minimum temperature to arrange incubation time and to plan the hatching time. Fertilized eggs were incubated into three beaker glasses of 1 liter in volume with the density of ± 250 eggs/liter. The incubation was done under laboratory condition at controlled temperature, i.e. (A) 21-22 ºC, (B) 24-25 ºC, (C) 27-28 ºC and (D) 30-31 ºC. The eggs that used were including orange spotted grouper (Epinephelus coiodes), brown marbled grouper (E. microdon), tiger grouper (E. fuscoguttatus) and humpback grouper (Cromileptes altivelis). Investigated variables were embryonic development pattern, incubation time and hatching rate. The result showed that the eggs incubated in temperature range of 24-31°C had the normal sequence of embryonic development pattern, but in temperature of 21-22°C performed irregular sequence and the embryonic development stopped at blastula or gastrula stage or even the eggs could still develop but the body of hatched larvae were abnormal. In lower temperature incubation, the incubation time was longer and the hatching rate of eggs was lower than those in higher temperature. Therefore the optimum temperature for incubation of orange spotted grouper, marbled grouper, tiger grouper and humpback grouper eggs ranged between 24-31 ºC, while the lowest possible temperature was 24 ºC.Keywords: incubation temperature, embryonic development pattern, grouper eggs, hatching rate

Co-Authors Bejo Slamet Daniar Kusumawati I Made Suastika Ni Ketut Maha Setiawati Ni Ketut Maha Setiawati Ni Wayan Widya Astuti Philip Teguh Imanto Restiana Wisnu Aryati

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