Articles

Aplikasi Ekstrak Rumput Laut Sebagai Agen Imunostimulan Sistem Pertahanan Non Spesifik Pada Udang (Litopennaeus vannamei) Ridlo, Ali; Pramesti, Rini
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 14, No 3 (2009): Jurnal Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (411.171 KB)

Abstract

Penelitian ini bertujuan untuk menganalisis potensi ekstrak dari rumput laut Dictyota sp., Gracilaria sp., Padina sp., dan Sargassum sp. sebagai imunostimulan sistem pertahanan tubuh non spesifik udang L. vannamei. Rumput laut diekstraksi dengan cara direbus dalam air mendidih selama 2 jam. Suplementasi ekstrak pada pakan udang buatan diberikan dengan dosis 10 g/kg pakan. Hasil penelitian menunjukkan adanya peningkatan jumlah hemosit dan aktivitas fagositosis udang L. vannamei akibat pemberian ekstrak rumput laut dibandingkan kontrol. Peningkatan tersebut terlihat pada  jumlah hemosit udang L. vannamei  yang diberi ekstrak Gracilaria sp. pada hari ke-8 , Dictyota  sp. dan Sargassum sp pada hari ke 12,  sedangkan  peningkatan aktifitas fagositosis terjadi pada perlakuan dengan ekstrak Dictyota sp., Gracilaria sp. dan Sargassum sp. pada hari ke-8. Pemberian ekstrak Sargassum sp memberikan hasil terbaik yaitu untuk jumlah hemosit 1,127±0,260 pada hari ke-12 dan aktifitas fagositosis 214,061±15,955 pada hari ke- 8. Kata kunci : Imunostimulan, rumput laut, L. vannamei Study on application of seaweed Dictyota sp., Gracilaria sp., Padina sp. and Sargassum sp. extract as imunostimulant agent for non-specific defense system of white shrimp (L. vannamei) was conducted. Air - dried seaweed was extracted by boiling in water for 2 hours then fortified into shrimp feed pellet with concentration of 10g/kg pellet. Haematological parameters of Total Haemocyte Count (THC) and Phagocytosist Activity (PA) was then tested at 4, 8, 12 days period after initial treatment. The result showed that fortification of seaweed extract was increased the number of haemocyte was clearly shown at day 8 of Gracilaria sp. extract treatment and day 12 of Dictyota sp. and Sargassum sp. treatment. Meanwhile phagocytosist activity was clearly increased at day 8 of Dictyota sp., Gracilaria sp. and Sargassum sp treatment.  Extract  of Sargassum sp. gave  the most significant effect with total haemocyte of 1,127 ± 0,260 at day 12th and phagocytosist activity of 214,061± 15,955 at day 8th. Key words : Immunostimulant, seaweed, L. vannamei
Fluktuasi Kandungan Proksimat Kerang Bulu (Anadara inflata Reeve) di Perairan Pantai Semarang Arnanda, Anthony D; Ambariyanto, Ambariyanto; Ridlo, Ali
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 10, No 2 (2005): Jurnal Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (142.525 KB)

Abstract

Kerang bulu, Anadara inflata Reeve, merupakan kerang yang paling banyak ditangkap di perairan Semarang. Kerang ini banyak dikonsumsi oleh masyarakat, namun belum banyak informasi mengenai kandungan gizi yang terdapat dalam kerang ini. Penelitian ini bertujuan untuk melihat fluktuasi kandungan proksimat dari kerang Bulu yang diambil di perairan Semarang. Kandungan proksimat yang diukur adalah protein, lemak, karbohidrat, kadar air, dan kadar abu. Hasil penelitian menunjukkan bahwa kadar protein berkisar antara 6,79 % - 11 92 %; kadar lemak berkisar antara 4,2 % - 6,16 %, dan kadar karbohidrat berkisar antara 2,3 % - 4,35 %. Sedangkan kadar air terendah terdapat dalam kerang bulu berukuran 20,0 – 30,0 mm sebesar 77,55 % dan kadar air terbanyak terdapat dalam kerang berukuran 50,10 – 60,0 mm sebesar 82,64 %; dan kadar abu berkisar antara 1,27 % - 2,08 %. Pada penelitian ini tidak terjadi fluktuasi kandungan proksimat. Perbedaan kandungan proksimat dalam kerang bulu pada ukuran maupun waktu sampling yang berbeda diduga karenabeberapa faktor, diantaranya adalah umur, ukuran tubuh, siklus reproduksi, serta faktor lingkungan.Kata kunci: kerang Bulu (Anadara inflata Reeve), fluktuasi, proksimatKerang bulu, Anadara inflata Reeve, is known as the most caught species of cockle around Semarang waters. This bivalve is also known as the largest number of cockle being consumed, however, there is only limited information available on its nutrition content. The aim of this study is to investigate proximate content of Kerang Bulu (A. inflata) caught in Semarang waters. Proximate content being analyzed were protein, lipid, carbohydrate, ash and water content. The result showed that the protein content were ranged between 6,79 % - 11,92 %; lipid content were ranged between 4,2 % - 6,16 % and carbohydrate content were between 2,3 % - 4,35 %. While the minimum water content in 20,0 – 30,0 mm is 77,55 %, and the maximum watercontent in 50,10 – 60,0 mm is 82,64 %; and the ash content were between 1,27 % - 2,08 %. The differences on the proximate content within different size of the cockles and differences of time sampling probably dueto differences of age, body size, reproduction cycle, and environmental factors.Key words : Kerang bulu (Anadara inflata Reeve), fluctuation, proximate content
Potensi Berbagai Jenis Lamun Sebagai Sumber Makanan Kesehatan : Analisis Proksimat Setyati, Wilis A; Su8bagiyo, Subagiyo; Ridlo, Ali
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 10, No 2 (2005): Jurnal Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Penelitian ini bertujuan untuk mempelajari status nutrisi berbagai jenis lamun yang terdapat diperairanBandengan, Jepara berdasarkan analisis proksimat (gula reduksi, serat kasar, lemak, protein dan abu). Penelitian ini juha melakukan analisis vegetasi lamun di perairan Bandengan, Jepara. Hasil penelitian menunjukan ada 6 jenis lamun yang tumbuh di perairan Bandengan Jepara yaitu Cymodecea serrulata, Thalassia hemprichii, Enhalus acoroides, Syrirgodium isoetifolium, Halodule uninervis dan Thalassodendron ciliatum. Keenam jenis lamun tersebut berturut-turut mempunyai kepadatan 109,00 ind/m2, 106,87 ind/m2, 89,35 ind/m2 , 82,97ind/m2 , 73,65 ind/m2 dan 18,75 ind/m2. Hasil analisis proksimat utuk ke enam jenis lamun tersebut berturut turut adalah sebagai berikut, Cymodecea serrulata mempunyai kandungan protein, gula reduksi, lemak, abu dan serat kasar berturut-turut (% berat kering) 9,39 ; 0,91; 7,81; 67,09; 19,25, Thalassia hemprichii berturut turut 8,35; 1,10 ; 7,38; 62,43; dan 17,27, Enhalus acoroides berturut-turut 7,65 ; 1,00; 6,13 ; 68,14 ; dan 19,92, Syrngodium isoetifolium berturut-turut 5,52 ; 2,19; 4,71; 70,62 dan 12,16. Sedangkan Halodule uninervis dan Thalassodendron ciliatum tidak dilakukan analisis proksimat karena jumlah vegetasi yang adasangat sedikit.Kata kunci : Lamun, analisis proksimat, analisis vegetasiThe research was done to answer how about nutritive profile (protein, lipids, reduction sugar ash and crudefibre) of some seagrass and how about some seagrasses can be improved potentially as foodhealthness. In this research vegetaion analyze or seagrasses also was done, to identified rheir diversity and density. The research found 6 species of seagrass in seagrass filed of Bandengan waters, Jepara, i.e. Cymodecea serrulata, Thalassia  hemprichii, Enhalus acoroides, Syrirgodium isoetifolium, Halodule uninervis dan Thalassodendron ciliatum. There have population density respectively 109,00 ind/m2, 106,87 ind/m2, 89,35 ind/m2 , 82,97 ind/m2, 73,65 ind/m2 and 18,75 ind/m2.The result of proximate analyze showed that Cymodecea serrulata haveprotein , sugar reduction, lipid, ash and crude fibre (% dry weight) respectively 9,39 ; 0,91; 7,81; 67,09;19,25, Thalassia hemprichii 8,35; 1,10 ; 7,38; 62,43; dan 17,27, Enhalus acoroides 7,65; 1,00; 6,13; 68,14 ; and 19,92, Syrngodium isoetifolium 5,52 ; 2,19; 4,71; 70,62 and 12,16. Halodule uninervis and Thalassodendron  ciliatum have not beeb abalyzed.Key words: seagrass, proximate analysis, vegetation analysis.
Uji Bioaktivitas Ekstrak Batang Tumbuhan Benalu Mangrove (Cassytha filiformis) : II. Uji Anti Bakteri Subagiyo, Subagiyo; Setyati, Wilis A; Ridlo, Ali
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 10, No 1 (2005): Jurnal Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (155.97 KB)

Abstract

Benalu adalah tumbuhan epifit parasit yang hidup menempel dan menghisap makanan dari tumbuhaninangnya. Sehingga benalu yang hidup pada tumbuhan mangrove mempunyai kemampuan khusus untuk beradaptasi terhadap senyawa-senyawa yang dibentuk oleh tumbuhan mangrove. Kondisi ini memungkinkan untuk ditemukannya jenis-jenis senyawa baru yang mempunyai potensi sebagai senyawa yang mempunyai nilai di bidang farmakologi dan agrokimia, diantaranya adalah anti bakteri Penelitian ini bertujuan untuk melakukan pengujian secara kualitatif dan kuantitaif bioaktivitas antibakteri dari fraksi-fraksi ekstrak batang C. filiformis. Penelitian dilakukan dengan metode experimental. ekstraksi dan pemisahan menggunakan pelarutkloroform-metanol (20:1). Fraksi-fraksi yang diperleh diuji bioaktivitas antibaktri menggunakan metodepaper disk. Ada 5 variasi konsentrasi fraksi yang diuji yaitu 50 ug/disk, 10 ug/disk, 5 ug/disk, 1 ug/diskdan 0,5 ug/disk. Berdasarkan hasil uji bioaktivitas antibakteri dari ekstrak batang benalu mangrove (C.filiformis) dapat disimpulkan bahwa ekstrak C. filiformis mempunyai potensi sebagai sumber metabolit antibakteri. Dalam penelitian ini semua fraksi tidak menunjukan aktivitas antibakteri terhadap bakteri V. parahaemoliticus dan S. aereus. Aktivitas antibakteri ditunjukan oleh semua fraksi terhadap bakteri uji V. harveyi dan V. anguilarum. Sedangkan aktivitas anti bakteri terhadap E. coli hanya ditunjukan oleh fraksi 4 dan fraksi 5.Kata kunci: Antibakteri, ekstrak C filiformis, benalu mangroveMistletoe as arboreal parasitic plant, hold and absorb their nutrient from host. During nutrient absorption,all of metabolites (include secondary metabolites) which host producing will be absorbed too. For thatmistletoe must have capability to developing strategies to adapt. The one of adaptation strategies is creating bioactive compounds, and predicted that between bioactive compounds have antibacterialactivity. The aim of this research were to antibacterial test of C filiformis stem extract. C filiformis wasextracted in chloroform-methanol (20:1). The fractions were examined to antibacterial activity using paper disc method. There are 5 variation concentration, which tested, 50 ug/disc, 10 ug/disc, 5 ug/disc, 1 ug/disc and 0,5 ug/disc. The result showed that all of fractions of stem extract of C. filiformis were able to inhibit the growth of both V. harveyi dan V. anguilarum, but not toward V. parahaemoliticus and S. aereu,  while fraction 4 and fraction 5 were able to hold the growth of E. coli.Key words : Antibacteria, stem extracts of C filiformis, mangrove mistletoe
Uji Bioaktivitas Ekstrak Batang Tumbuhan Benalu Mangrove (C. filiformis) : I. Uji Antifungal Subagiyo, Subagiyo; Setyati, Wilis A; Ridlo, Ali
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 9, No 4 (2004): Jurnal Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (158.142 KB)

Abstract

Benalu adalah tumbuhan epifit parasit yang hidup menempel dan menghisap makanan dari tumbuhan inangnya. Selama proses penyerapan makanan ini akan ikut pula semua senyawa yang dibentuk oleh mangrove sebagai alat pertahanan diri, maka tumbuhan benalu yang hidup pada tumbuhan mangrove juga mempunyai kemampuan khusus untuk beradaptasi terhadap senyawa-senyawa yang dibentuk oleh tumbuhan mangrove. Sehingga dimungkinkan untuk ditemukannya jenis-jenis senyawa baru yang mempunyai potensi anti fungi. Senyawa-senyawa aktif ini kemudian dapat dikembangkan lebih lanjut dalam rangka pengendalian penyakit baik bagi manusia maupun dalam bidang budidaya perikanan, peternakan maupun pertanian. Penelitian dilakukan dengan metode experimental. Ekstrak kasar diperoleh dengan metode masrasi menggunakan methanol sebagai pelarutnya. Sedangkan fraksinasi dilakukan dengan metode kromatografi kolom menggunakan methanol-chloroform (20:1) sebagai eluennya. Aktivitas antifungal diuji dengan metode paper disk. Ada 5 variasi konsentrasi fraksi yang diuji yaitu 50 ug/disk, 10 ug/disk, 5 ug/disk, 1 ug/disk dan 0,5 ug/disk. Hasil studi parasit-host menunjukan bahwa dilokasi penelitian (kawasan mangrove Teluk Awur-Jepara) C. filiformis terdapat sebagai parasit pada tumbuhan mangrove Lumnitzera sp dan Excoecoria aggaloca. Sedangkan hasil uji aktivitas antijamur menunjukan bahwa semua fraksi menunjukanaktivitas antijamur terhadap jamur Trichoderma hanya pada pengamatan 24 jam pertama. Aktivitas anti jamur terhadap Fusarium ditunjukan oleh semua fraksi, dan aktivitas terhadap Aspergillus ditunjukan olehfraksi fraksi 1 dan fraksi 5.Kata kunci : bioaktivitas, antifungal, extract batang, C filiformis, benalu mangroveMistletoe as arboreal parasitic plant, hold and absorb their nutrient from host. During nutrient absorption, all of metabolites (include secondary metabolites) which host producing will be absorbed too. For thatmistletoe must have capability to developing strategies to adapt. The one of adaptation strategies is creating bioactive compounds, and predicted that between bioactive compounds have antifungal activity.Extraction and fractination of stem of C. filiformis, and testing of its antifungal activity were done. Stem of C. filiformis was extracted in methanol. Crude extract was fractionated chromatograhically using methanolchloroform (20:1) as eluent. Antifungal was tested using agar disc-diffusion methods. There are 5 variation concentration, which tested, 50 ug/disc, 10 ug/disc, 5 ug/disc, 1 ug/disc and 0,5 ug/disc. Theresult showed that C. filiformis found as parasite on Lumnitzera sp and Excoecoria aggaloca. Antifungal test toward C. filiformis fractions showed that Fusarium and Trichoderma were inhibited by all of fractionswhile Aspergillus was inhibited only by fraction 1 and fraction 5.Key words : bioactivity, antifungal, stem extract, C. filiformis, misletoe
Pengaruh Penggunaan Pakan Alami Tetraselmis chuii dan Skeletonema costatum dengan Dosis yang Berbeda terhadap Pertumbuhan Kerang Totok (Effect of Using Natural Food Tetraselmis chuii and Skeletonema costatum with Different Doses on the Growth of Totok ..) Supriyantini, Endang; Ismunarti, Dwi Haryo; Ridlo, Ali
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 17, No 2 (2012): Jurnal Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (104.472 KB)

Abstract

Pengetahuan tentang asupan nutrisi yang sesuai untuk kerang totok Polimesoda erosa sangat penting selain untuk meningkatkan kegunaan diet mikroalga juga untuk mengetahui dosis pakan alami Tetraselmis chuii dan Skeletonema costatum yang paling efisien terhadap pertumbuhan kerang totok. Biota yang digunakan dalam penelitian ini adalah kerang totok ukuran 3-4 cm yang diperoleh dari perairan sekitar P. Gombol, Segara Anakan, Cilacap. Wadah yang digunakan adalah akuarium berukuran 30x30x30 cm dengan volume media 2 liter. Metode yang digunakan adalah eksperimental laboratorium dengan rancangan acak lengkap, 3 perlakuan dan 3 ulangan, yaitu campuran T. chuii 36 x 104 sel/ml dan S. costatum 9 x 104 sel/ml (pakan T1); T. chuii 27 x104 sel/ml dan S. costatum 18 x 104 sel/ml (pakan T2) dan T. chuii 18 x 104sel/ml dan S. costatum 27 x 104 sel/ml (pakan T3). Pakan diberikan sekali sehari, pemeliharaan dilakukan selama 3 bulan. Pengukuran beratyang dilakukan seminggu sekali dan dianalisis Specific Growth Rate (SGR) dan Food Convertion Ratio (FCR). Hasil penelitian menunjukkan bahwa campuran pakan T. chuii dan S. costatum memberikan pengaruhpertambahan berat yang berbeda nyata (p< 0,05), tetapi tidak memberikan pengaruh yang nyata terhadap SGR dan FCR kerang Totok (p > 0,05). Pakan campuran T. chuii 27 x 104 sel/ml dan S. costatum 18 x 104 sel/ml meningkatkan nilai SGR namun mempunyai nilai FC yang besar.Kata kunci: Kerang Totok, Polimesoda erosa, Tetraselmis chuii, Skeletonema costatumKnowledge on ideal feeding dose for kerang totok P. erosa is needed to improved the use of microalgae diet and to investigate the most efficient natural feeding dose of T. chuii and S. costatum on growth of kerang totok (P. erosa). The organism used on this study was Kerang Totok size 3-4 cm which harvested from P. Gombol, Segara Anakan, Cilacap. Experiment was conducted in 30cm x 30cm x 30 cm aquarium filled with 2 liter of water each. A fully randomized design of laboratorium experimental method was applied for the study with three treatment i.e; 36 x 104 cell/ml T. chuii : 9 x 104 cell/ml S. costatum (T1); 27 x 104 cell/ml T. chuii : 18 x 104 cell/ml S. costatum (T2) and 18 x 104cell/ml T. chuii : 27 x 104 cell/ml S. costatum (T3), single feed dose per day at 08.00 WIB for 3 month period. Three replications were set up for each treatment. Parameter measured during the study were weight (weekly measurement), Specific Growth Rate (SGR) and Food Convertion Ratio (FCR). The result showed that feeding dose of T. chuii and S. costatum significantly affect the mean weekly weight gain (p< 0,05) but not to mean of SGR or FCR (p > 0,05). Mixture of 27 x 104 sel/ml T. chuii : 18 x 104 sel/ml S. costatum) tend toincrease the SGR values but give bigger FCR during the study period.Key words: Kerang Totok, Polimesoda erosa, Tetraselmis chuii, Skeletonema costatum
PENGARUH PERENDAMAN AIR KAPUR TERHADAP KADAR SULFAT DAN KEKUATAN GEL KARAGINAN RUMPUT LAUT Kappaphycus alvarezii Haris, Radityo; Santosa, Gunawan Widi; Ridlo, Ali
Journal of Marine Research Vol 2, No 2 (2013) : Journal of Marine Research
Publisher : Journal of Marine Research

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (227.896 KB)

Abstract

Gel formation is the result of crosslinking between adjacent helical chains, with sulphate groups facing to the outside. The theoretical basic is using alkaline compounds are cheap and easily available to eliminate the sulfate groups on the K-carrageenan, with the water immersion method of Ca(OH)2 to increase the degree of molecular uniformity and gel strength. This study is to determine the effect of Ca(OH)2 water immersion of sulphate content and gel strength. This study its experimental research laboratory with a completely randomized design and variations in treatment where seaweed samples were treated with submersion of Ca(OH)2 at different concentration (1.2 g/L, 0.6 g/L, and 0.3 g/L). The experiments were performed with 3 replications. The first extraction process used 5% KOH, being the second extraction used 1% KCl. Determination was carried out toward powder of carrageenan, its chemical characters (moisture content, ash, and sulphate), physical characters (viscosity, gel strength, and color of thalus) carrageenan had produced. The results showed that seaweed treated with 0.3 g/L Ca(OH)2 very significantly influent (p <0.01), produced the highest gel strength at 516.23 dyne/cm with the lowest sulfate levels at 20.84 %.
Kajian Rumput Laut Sargassum duplicatum J. G. Agardh sebagai Penghasil Bioetanol dengan Proses Hidrolisis Asam dan Fermentasi Saputra, Dion Ragil; Ridlo, Ali; Widowati, Ita
Journal of Marine Research Vol 1, No 2 (2012): Journal of Marine Research
Publisher : Journal of Marine Research

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (119.51 KB)

Abstract

Bioethanol is an alternative fuel made from biomass containing sugar components, starch, and cellulose. So far, bioethanol is made from raw materials which become a source of food and feed resulting in the competition. The potential of cellulosic biomass seaweed S. duplicatum as bioethanol production can be a solution to resolve the issue. The purpose of this research was to study seaweed S. duplicatum J.G. Agardh as raw material for bioethanol. Method used for this research was experimental laboratory with a completely randomized design (RAL) factorial pattern to test glucose levels and a randomized block design (RAK) to test the ethanol levels. Ethanol concentration was determined by Gas Chromatography (GC). Hydrolysis with H2SO4 concentration of 0.2 M, 0.3 M, 0.4 M, 0.5 M and the variation within 30 minutes, 60 minutes, 120 minutes. The fermentation conducted with yeast S. cereviceae with incubation time 24 hours, 48 hours, 72 hours. Ethanol concentration measurements conducted using Gas Chromatography (GC). The results showed that the best conditions for hydrolysis of concentrated H2SO4 0.4 M (28.051 mg / ml ± 1.100) and 120 minutes (23.128 mg / ml ± 6.069). During the fermentation process, the maximum ethanol levels achieved at 72 hours incubation time is 0.0451% v / v ± 0.0098
Pengaruh Perendaman Larutan KOH dan NaOH Terhadap Kualitas Alginat Rumput Laut Sargassum polycycstum C.A. Agardh Mirza, Mohamad; Ridlo, Ali; Pramesti, Rini
Journal of Marine Research Vol 2, No 1 (2013): Journal of Marine Research
Publisher : Journal of Marine Research

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (164.102 KB)

Abstract

Sargassum polycystum seaweed is a type of brown algae that contains alginate. Alginate from S. polycystum did not optimally and alginate has an importnat role from a variety of industries. Alginate ekstraction obtained by submersion wes using NaOH and KOH solvent, then continued using Na2CO3 solvent. The purpose of this research was to determine the effect of immersion with KOH and NaOH with concentration 0,3%, 0,5% and 0,7% solution to the quality alginate from brown seaweed S. polycystum. Experimental design used was Rancangan Acak Lengkap (RAL). The results showed that aging of the KOH solution has a lower water content and higher viscosity than NaOH solution. The concentration of the solution used also affects the yield, moisture content, ash content and viscosity alginate S. polycystum. The higher concentration of the solution then the yield, moisture content and lower ash content, while viscosity alginate increased. The best results obtained in the treatment with a solution of KOH concentration of 0.7%.
Studi Pemanfaatan Ekstrak Rumput Laut Gracilaria verrucosa Sebagai Suplemen Pakan Untuk Meningkatkan Pertumbuhan Udang Putih (Litopenaeus vannamei) Dan Mengendalikan Populasi Bakteri Vibrio Sasmaya, Eko; Subagiyo, Subagiyo; Ridlo, Ali
Journal of Marine Research Vol 2, No 1 (2013): Journal of Marine Research
Publisher : Journal of Marine Research

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (139.16 KB)

Abstract

The shrimp fishery has a high economic value. Data from the Ministry of Maritime Affairs and Fisheries (2011) states that the group of marine crustaceans in Indonesia has high potential with production reaching 381,288 tons / yr. From these results more than half of its cultivation. Aquaculture has the risk of which is the onset of the disease caused by viruses, fungi, bacteria, fungi and parasites that cause high levels of mortality and loss of quality of meat. One way to overcome these problems is to use feed supplementation. This study aimed to determine the effect of supplementation of extracts G. verrucosa on feed on shrimp growth (weight and length), specific growth rate, survival rate of shrimp, feed conversion ratio, and Vibrio bacterial populations. The research was conducted through laboratory experimental method to the study design completely randomized design (CRD) with 3 treatments and each treatment with three replications. The treatments tested were feed by supplementing 0.5%, 1% and 2% respectively supplementation performed 3 times repetition. Feed obtained by extraction G. verrucosa, that is by G. verrucosa put in a pot submerged Stainless steel up to boiling and boil for ± 2 hours and obtained extracts G. verrucosa, then performed using a rotary solvent evaporation process to obtain dry extracts G. verrucosa. Further supplementing the feed. Results showed that the extract of G. verrucosa able to improve and control the growth of white shrimp vibrio bacteria populations in the intestines white shrimp (L. vannamei). In this study the condition of seaweed extract supplementation G. verrucosa at a concentration of 2% were able to increase the weight of shrimp growth of 131.43% and a growth of 32.50% shrimp length than controls during 28 days of treatment, as well as being able to control populations of bacteria vibrio, vibrio that reduces the total amount of 78.18% compared to controls at the third week.