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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

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

PENENTUAN WAKTU AWAL PEMBERIAN ZOOPLANKTON KOPEPODA UNTUK PENINGKATAN PERTUMBUHAN DAN KELANGSUNGAN HIDUP LARVA IKAN KERAPU SUNU (Plectropomus leopardus Lacepède, 1802) Regina Melianawati; Daniar Kusumawati; Ni Ketut Maha Setiawati
Saintek Perikanan : Indonesian Journal of Fisheries Science and Technology Vol 18, No 1 (2022): SAINTEK PERIKANAN
Publisher : Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ijfst.18.1.26-35

Ikan kerapu sunu (Plectropomus leopardus) merupakan komoditas perikanan laut bernilai ekonomis tinggi, sehingga kegiatan pembenihannya penting untuk dilakukan. Salah satu aspek penting dalam pembenihan adalah pemberian pakan alami berupa zooplankton. Salah satu jenis zooplankton yang diketahui berpengaruh positif dalam pembenihan ikan kerapu sunu adalah kopepoda. Namun demikian, waktu awal pemberian kopepoda yang tepat hingga saat ini belum diketahui. Oleh karenanya, penelitian ini bertujuan untuk mengetahui waktu awal pemberian kopepoda yang tepat bagi larva ikan kerapu sunu. Perlakuan yang diujikan adalah pemberian kopepoda stadia naupli mulai larva umur 3 hari (A), 5 hari (B), 7 hari (C) dan pada umur 4 hari saja (D). Setiap perlakuan diulang 3 kali ulangan waktu. Penelitian dilakukan hingga sebagian besar larva telah menjadi juvenil pada umur 45 hari. Hasil penelitian menunjukkan bahwa larva yang diberi pakan kopepoda lebih awal, yaitu pada umur 3 dan 5 hari cenderung memiliki pertumbuhan yang lebih baik dan kelangsungan hidup yang lebih tinggi dibandingkan dengan pada larva yang diberi kopepoda mulai umur 7 hari maupun yang hanya diberi pada umur 4 hari saja. Larva yang diberi kopepoda secara kontinyu juga dapat mencapai fase metamorfosis lebih cepat. Jadi, waktu awal pemberian kopepoda cenderung berpengaruh terhadap pertumbuhan dan kelangsungan hidup larva ikan kerapu sunu meskipun secara statistik tidak berbeda nyata (P>0,05). Berdasarkan hasil penelitian ini maka pemberian kopepoda dalam pemeliharaan larva ikan kerapu sunu sebaiknya dilakukan secara kontinyu mulai larva umur 3 hari. Coral trout (Plectropomus leopardus) is a marine fish which has highly economical value as prestigious seafood. So, the cultivation of this species in hatchery should be conducted. One of the important factors in marine fish hatchery is the kind of zooplankton as the live feed during the larval stage. Previuos study indicated that copepods play a significant role in larvae rearing of coral trout. However, the right initial time to feed the larvae by copepods is still unknown. Therefore, this research was conducted to determine the initial time of feeding copepods to coral trout larvae. The treatment tested was different initial time of feeding naupli stage copepods to larvae, that was started at 3 (A), 5 (B), 7 (C) days after hatching, respectively and at 4 days old larvae only (D). Each treatment was performed with 3 time replications. This study was done until mostly all of the larvae become juveniles at 45 days after hatching. The results showed that larvae on treatment (A) and (B) tended to have better growth and higher survival rate compared to larvae from treatment (C) and (D). Larvae which were fed copepods continuously also reached metamorphosis stage faster compared than the only once fed. Thus, the initial feeding time of copepods tended to influence the growth and survival rate of coral trout larvae event hough they were not statistically significant different (P> 0.05). Based on the result of this research, feeding copepods to coral trout larvae in hatchery should be carried out continuously starting at 3 days old larvae.

PERTUMBUHAN DAN TINGKAT KEMATANGAN GONAD IKAN KERAPU BATIK (EPINEPHELUS POLYPHEKADION) HASIL BUDIDAYA Ni Ketut Maha Setiawati; Regina Melianawati
JFMR (Journal of Fisheries and Marine Research) Vol 4, No 1 (2020): JFMR VOL 4 NO 1
Publisher : JFMR (Journal of Fisheries and Marine Research)

Ikan kerapu batik merupakan jenis ikan laut yang bernilai ekonomis tinggi, sehingga budidaya terhadap ikan ini perlu dilakukan. Dua parameter yang penting dalam budidaya adalah pertumbuhan untuk mengetahui kondisi individu ikan dan tingkat kematangan gonad (TKG) yang menunjukkan perkembangan gonad ikan. Kedua hal tersebut merupakan indikator yang penting untuk evaluasi keberhasilan suatu budidaya. Penelitian ini bertujuan untuk mengetahui pertumbuhan, panjang dan berat ikan kerapu batik hasil budidaya serta perkembangan tingkat kematangan gonadnya selama pemeliharaan. Penelitian menggunakan 2 buah bak fiberglass volume 1.000 L, yang masing-masing bak diisi dengan 20 ekor ikan dengan ukuran panjang awal 8,96± 1,5 cm dan berat tubuh 13±2 g. Pemeliharaan dilakukan selama 19 bulan dan selama itu ikan diberi pakan pellet. Variabel yang diamati adalah pertumbuhan ikan yang diukur dari panjang dan berat tubuhnya, serta tingkat kematangan gonad dan diameter telurnya. Hasil menunjukkan bahwa pada akhir penelitian, panjang ikan mencapai 16,0-30,9 cm, terbanyak pada kisaran panjang 22,0-24,9 cm (37,7%), dan berat tubuhnya berkisar 60-484 g. Pertumbuhan berat ikan lebih cepat daripada pertumbuhan panjangnya. Gonad ikan mulai berkembang pada panjang 19,0-21,9 cm dengan TKG I (54,5%), II (27,5%) dan III (18,0%). Pada akhir penelitian, ikan dengan panjang 28,0-30,9 cm sudah mencapai TKG IV (60%). Kisaran diameter telur yang dominan pada TKG I, II, III dan IV, masing-masing adalah 10,0-35,9 µm (89,5%), 36,0-61,9 µm (73,2,%), 36,0-61,9 µm (56,1%) dan 30,0-61,9 µm (58,8%). Hasil ini menunjukkan bahwa ikan kerapu batik hasil budidaya yang dipelihara dalam bak pemeliharaan dapat mengalami pertumbuhan dan perkembangan tingkat kematangan gonad.

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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