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All Journal ILMU KELAUTAN: Indonesian Journal of Marine Sciences Saintek Perikanan : Indonesian Journal of Fisheries Science and Technology Journal of Aquaculture Management and Technology Jurnal Kelautan Tropis Sains Akuakultur Tropis : Indonesian Journal of Tropical Aquaculture Jurnal Riset Akuakultur Jurnal Sains Teknologi Akuakultur PENA AKUATIKA : JURNAL ILMIAH PERIKANAN DAN KELAUTAN Jurnal Pasopati : Pengabdian Masyarakat dan Inovasi Pengembangan Teknologi
Restiana Wisnu Ariyati
Program Studi Budidaya Perairan, Jurusan Perikanan, Fakultas Perikanan Dan Ilmu Kelautan, Universitas Diponegoro
Aerospace Engineering Agriculture, Biological Sciences & Forestry Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Electrical & Electronics Engineering Environmental Science Industrial & Manufacturing Engineering Social Sciences Other

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PENGARUH KEDALAMAN DAN JARAK TANAM BERBEDA TERHADAP PERTUMBUHAN DAN KANDUNGAN AGAR Gracilaria verrucosa DENGAN METODE LONGLINE DI TAMBAK Danang Saputro; Titik Susilowati; Restiana Wisnu Ariyati
Sains Akuakultur Tropis : Indonesian Journal of Tropical Aquaculture Vol 5, No 1 (2021): SAT Edisi Maret
Publisher : Departemen Akuakultur FPIK UNDIP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/sat.v5i1.5766

Abstract

Gracilaria verrucosa termasuk dalam Rhodophyta yang memiliki nilai ekonomis dan merupakan komoditas utama budidaya di Indonesia yang produksinya meningkat antara tahun 2010 hingga 2014. Agar adalah salah satu ekstrak hidrokoloid dari Gracilaria, yang kualitasnya tergantung pada jenis, metode budidaya dan kualitas air. Penelitian ini bertujuan untuk mengetahui pengaruh kedalaman dan jarak tanam berbeda terhadap pertumbuhan dan kandungan agar rumput laut dengan metode longline. Penelitian dilaksanakan pada bulan Februari-April 2019 di Balai Besar Perikanan Budidaya Air Payau (BBPBAP) Jepara. Rancangan percobaan yang digunakan yaitu Rancangan Faktorial, dimana faktor D (kedalaman 20 cm, 40 cm dan 60 cm) dan faktor J (jarak tanam 30 cm, 40 cm, dan 50 cm). Nilai laju pertumbuhan spesifik (SGR), kandungan agar dan laju penyerapan nitrat dan fosfat ditentukan setelah 45 hari pemeliharaan. Nilai SGR dianalisis menggunakan ANOVA dan dilanjutkan dengan Uji Duncan. Berdasarkan hasil penelitian, laju pertumbuhan spesifik (SGR) tertinggi adalah perlakuan dengan kedalaman 20 cm dan jarak tanam 40 cm (D1J2) sebesar 2,15±0,20%/hari, kandungan agar rumput laut memperoleh hasil tertinggi pada kombinasi perlakuan kedalaman 20 cm dan jarak tanam 30 cm (D1J1) serta kedalaman 20 cm dan jarak tanam 40 cm (D1J2) sebesar 14,29%, puncak laju penyerapan nitrat dan fosfat tertinggi saat 9 hari awal masa pemeliharaan rumput laut berturut-turut sebesar 190,15 mg/g G. verrucosa/hari dan 75,26 mg/g G. verrucosa/hari. Hasil pengukuran kualitas air yang diperoleh menunjukkan bahwa kualitas air pada lokasi penelitian berada dalam kisaran yang masih dapat ditoleransi oleh rumput laut.
Utilization of Locally Available Feeds to Develop Sustainable Blue Swimming Crab (Portunus pelagicus) Farming in Central Java Ariyati, Restiana Wisnu; Trienes, Yoni; Rejeki, Sri; Hutabarat, Johannes; Haeruddin, Haeruddin; Sarjito, Sarjito; Saputra, Suradi Wijaya; Widowati, Lestari Lakhsmi; Schrama, Johan; Bosma, Roel H.
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 29, No 4 (2024): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ik.ijms.29.4.433-444

Abstract

The popularity of the blue swimming crab (Portunus pelagicus) has led to significant overfishing. Aquaculture offers a potential solution to reduce fishing pressure, given that P. pelagicus is relatively easy to hatch, has high fecundity, a short larval duration, and rapid growth. However, knowledge about feed preferences and feed-use efficiency in P. pelagicus is limited. This study compared the effectiveness of three locally available feeds. A total of 160 juvenile P. pelagicus were divided into five repetitions across four diet groups: PPV (shrimp pellets + Perna viridis flesh, crude protein = 45 %), PAI (shrimp pellets + Acetes indicus, crude protein = 45 %), P100 (shrimp pellets, crude protein = 30%), and P150 (shrimp pellets at 150% of the dry matter requirement, crude protein = 45%, iso-protein to both PPV & PAI). The experiment consisted of three phases: a one-week pre-trial to determine feeding rates, followed by a six-week culture period (Period-1) and an eight-week culture period (Period-2). Body weight and survival were measured biweekly, feed amounts were adjusted accordingly, and costs were recorded. Survival rates and feed conversion ratios were similar across all diets. Crab growth was lower in Period-2 than in Period-1 across treatments. The specific growth rates for PPV, PAI, and P150 were comparable, while P100 resulted in lower growth. The cost of PPV was higher than that of PAI, P100, and P150, with the economic feed conversion ratio for P100 and P150 outperforming PPV and PAI. Shrimp pellets proved to be an efficient feed for the grow-out phase of blue swimming crabs, though pellet size should match the crab’s size.
Assessing the Impact of Substrate and Shelter on Cannibalism in Blue Swimming Crab (Portunus pelagicus) Ariyati, Restiana Wisnu; Caesa, Genio; Rejeki, Sri; Hutabarat, Johannes; Haeruddin, Haeruddin; Sarjito, Sarjito; Widowati, Lestari Lakhsmi; Bosma, Roel
Jurnal Kelautan Tropis Vol 27, No 3 (2024): JURNAL KELAUTAN TROPIS
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/potensi.%Y.24653

Abstract

Blue swimming crab (Portunus pelagicus) is one of Indonesia’s essential fishery commodities, but overfishing has depleted its population. Aquaculture, as an alternative to produce this crab, is hampered by high levels of cannibalism. Substrates or shelters can reduce cannibalism. This study compared the effectiveness of one substrate and two types of shelter for reducing cannibalism of P. pelagicus crablets. Crablets with average carapace length of 3.6 ± 2.2 cm and average weight of 6.4 ±1.5 g.ind-1 were stocked in 24 rectangular tarpaulin tanks with 1 m2 surface and 50 cm water depth. The stocking density was 8 crablets in each tank. A split-plot experimental design was applied with four main plots and two subplots with 3 replications. The main plot consisted of A0 (without shelter), A1 (seaweed), A2 (pipes), and A3 (seaweed and pipes), and sub-plots had either no-substrate (B0) or sand-substrate (B1). Cannibalism (K), survival (S), and four water quality parameters were recorded for 42 days. The data were analyzed using an ANOVA for a split-plot design and post-hoc Tukey. The results show that the sand substrate significantly (P>0.05) reduced cannibalism and increased survival of the P. pelagicus. Treatment A0B0, without substrate or shelter, showed the highest cannibalism (54±7%) and lowest survival rates (33±7%). While treatment A1B1, with Gracillaria sp. as shelter and sand as bottom-substrate resulted in the lowest cannibalism (4±7%) and highest survival rates (88±13%).
Growth of Gracilaria sp. in Monoculture and Polyculture System with Milkfish (Chanos chanos Forsk) in Traditional Ponds, Brebes Regency, Central Java Rahmawati, Vira Rizqi; Rejeki, Sri; Amalia, Rosa; Widowati, Lestari Lakhsmi; Ariyati, Restiana Wisnu; Nauta, Reinier; Lansbergen, Romi
Jurnal Kelautan Tropis Vol 27, No 1 (2024): JURNAL KELAUTAN TROPIS
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jkt.v27i1.22236

Abstract

Gracilaria sp. has a high economic value, which can be cultivated in monoculture or polyculture with other cultivars, such as milkfish (Chanos chanos Forsk). Polyculture of Gracilaria sp. with milkfish can increase the growth of Gracilaria sp. because the metabolic products of milkfish are helpful as a source of nutrients for Gracilaria sp. This study aimed to (1) examine the effect of Gracilaria sp. cultivation in monoculture and polyculture with milkfish on the growth of Gracilaria sp. and (2) the nutrient content of the water. This study used an experimental method with two treatments and three replications using six (6) earth ponds: Gracilaria sp. monoculture and polyculture with milkfish. Growth and nutrient content (nitrate and phosphate) data were analyzed using a t-test. The results of the study showed that the growth of Gracilaria sp. polyculture with milkfish provided absolute growth of 3615.89 ± 330.84 g; Relative Growth Rate (RGR) 180.79 ± 16.54 %; and Specific Growth Rate (SGR) 2.29 ± 0.13 %/day were significantly higher, compared with the growth of Gracilaria sp. monoculture. Monoculture Gracilaria sp showed absolute growth of 1912.71 ± 386.94 g; RGR 95.64 ± 19.35 %; and SGR 1.48 ± 0.22 %.day-1. Nutrient content in polyculture pond waters revealed nitrate 1.08 ± 0.09 mg.L-1 and phosphate 0.18 ± 0.04 mg.L-1 were significantly higher compared to nutrient content in monoculture pond waters which were nitrate 0.71 ± 0.22 mg.L-1 and 0.07 ± 0.04 mg.L-1. Polyculture Gracilaria and seaweed provide higher production due to the enrichment from nutrient content. 
KELIMPAHAN DAN JENIS BAKTERI Vibrio PADA AIR DAN SEDIMEN TAMBAK UDANG VANAME SISTEM MONOKULTUR DAN POLIKULTUR DENGAN Gracilaria sp. DI KABUPATEN BREBES Ariyati, Restiana Wisnu; Widowati, Lestari Lakhsmi; Rahmawati, Amelia; Sarjito, Sarjito; Rejeki, Sri
Jurnal Riset Akuakultur Vol 18, No 3 (2023): (September, 2023)
Publisher : Politeknik Kelautan dan Perikanan Jembrana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15578/jra.18.3.2023.181-195

Abstract

Infeksi bakteri Vibrio merupakan salah satu masalah yang banyak dihadapi pada budidaya udang vaname. Serangan vibriosis disebabkan oleh tingginya limbah organik di perairan. Rumput laut jenis Gracilaria sp. memiliki senyawa aktif dan kemampuan memperbaiki kualitas air sehingga dapat mereduksi kelimpahan bakteri Vibrio. Tujuan dari penelitian ini adalah untuk mengetahui kelimpahan dan jenis bakteri Vibrio pada budidaya udang vaname secara monokultur dan polikultur dengan Gracilaria sp. Sampel air dan sedimen diambil dari lima tambak monokultur dan lima tambak polikultur di Kabupaten Brebes, Jawa Tengah.  Bakteri Vibrio dihitung kelimpahannya dengan metode total plate count dan diidentifikasi secara morfologi, mikroskopis, dan uji biokimia. Kelimpahan bakteri Vibrio air di tambak polikultur lebih rendah (3,46 × 104  CFU mL-1) dibanding tambak monokultur (2,18 × 105  CFU mL-1). Bakteri V. alginolyticus terdapat pada substrat dan air di tambak monokultur, namun pada tambak polikultur hanya terdapat di air. Hal ini diduga karena Gracilaria sp. memiliki kandungan senyawa bioaktif (alkaloid, flavonoid, steroid, dan fenolik) yang berperan sebagai antibakteri alami. Lebih lanjut, kandungan nitrat dan fosfat di tambak polikultur (0,3-0,5 ppm dan 1,3-1,4 ppm) lebih rendah dibanding tambak monokultur (2,2-2,4 ppm dan  2,5-2,1 ppm). Kondisi ini menyebabkan Bakteri Vibrio fluvialis dan Vibrio vulnificus terdapat pada tambak monokultur yang memiliki nitrat dan fosfat yang lebih tinggi dari tambak polikultur. Hal ini menunjukkan bahwa Gracilaria sp. memiliki kemampuan dalam mereduksi nutrien melalui thallusnya, sehingga menciptakan lingkungan perairan yang lebih baik untuk mereduksi kelimpahan bakteri Vibrio. Vibrio bacterial infection is one of the problems often faced in Pacific white leg shrimp cultivation. Vibriosis attacks are caused by high levels of organic waste in waters. Gracilaria sp. has active compounds and the ability to improve water quality so that it can reduce the abundance of Vibrio bacteria. The aim of this study was to determine the abundance and types of Vibrio bacteria in cultivation of Pacific white leg shrimp in monoculture and polyculture with Gracilaria sp. Water and sediment samples were taken from five monoculture ponds and five polyculture ponds in Brebes, Central Java. The abundance of Vibrio bacteria was calculated using the total plate count method and identified morphologically, microscopically, and biochemically. The abundance of Vibrio bacteria in water of polyculture ponds was lower (3.46 × 104 CFU mL-1) than in monoculture ponds (2.18 × 105 CFU mL-1). Vibrio alginolyticus is found in the substrate and water of monoculture ponds, but in polyculture ponds it was only found in water. This was thought to be because Gracilaria sp. contains bioactive compounds (alkaloids, flavonoids, steroids, and phenolics) which act as natural antibacterials. Furthermore, the nitrate and phosphate content in polyculture ponds (0.3-0.5 ppm and 1.3-1.4 ppm) was lower than in monoculture ponds (2.2-2.4 ppm and 2.5-2.1 ppm). This condition caused Vibrio fluvialis and Vibrio vulnificus found in monoculture ponds which had higher nitrate and phosphate than polyculture ponds. This showed that Gracilaria sp. has the ability to reduce nutrients through its thallus, thus creating a better aquatic environment to reduce the abundance of Vibrio bacteria. 
HUBUNGAN PRODUKTIVITAS PRIMER DENGAN TINGKAT PRODUKSI TAMBAK POLIKULTUR RUMPUT LAUT DENGAN UDANG DAN IKAN BANDENG: STUDI KASUS DI BREBES, JAWA TENGAH, INDONESIA Widowati, Lestari Lakhsmi; Fitarani, Novia; Rejeki, Sri; Ariyati, Restiana Wisnu
Jurnal Riset Akuakultur Vol 19, No 2 (2024): Juni (2024)
Publisher : Politeknik Kelautan dan Perikanan Jembrana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15578/jra.19.2.2024.123-140

Abstract

Produktivitas tambak dipengaruhi oleh produktivitas primer yang tergantung dari kesetimbangan dinamika suhu, salinitas, kandungan oksigen, fosfat, dan nitrat. Nilai produktivitas primer yang tinggi meningkatkan daya dukung lingkungan bagi pertumbuhan rumput laut, ikan bandeng, dan udang. Tujuan dari penelitian ini adalah untuk mengetahui hubungan produktivitas primer terhadap produksi tambak polikultur dan membandingkan hasil produksi Gracilaria sp. pada tambak polikultur rumput laut dengan udang (RLU) dan rumput laut dengan ikan bandeng (RLB). Observasi selama 4 bulan dilakukan pada 10 tambak RLU dan 10 tambak RLB di Desa Randusanga Wetan, Kabupaten Brebes. Padat tebar ikan bandeng adalah 1-2 ekor m-2, udang windu 10 ekor m-2, dan rumput laut adalah 1 ton ha-1. Dosis pakan udang 2% bobot tubuh per hari, sedangkan ikan bandeng hanya mengandalkan pakan alami berupa klekap yang tumbuh di tambak. Nilai produktivitas primer pada tambak RLB (112,17 ± 41,06 mgC.m-3.hari-1) dan RLU (105,39 ± 29,12 mgC.m-3.hari-1)  tidak menunjukkan perbedaan yang signifikan (P<0,05). Hubungan produktivitas primer dengan produksi Gracilaria sp. adalah cukup kuat, yaitu 76% pada polikultur dengan ikan bandeng, dan 61% pada polikultur dengan udang. Namun, korelasi produktivitas primer terhadap produksi ikan bandeng dan udang windu memiliki hubungan yang rendah (10%). Tambak RLB menghasilkan produksi Gracilaria sp. lebih tinggi (8.885 kg.ha-1.siklus-1) dibandingkan dengan tambak RLU (7.203 kg.ha-1.siklus-1). Pada budidaya polikultur dengan rumput laut, produksi ikan bandeng adalah 688 kg.ha-1.siklus-1, dan produksi udang yaitu 593 kg.ha-1.siklus-1. Produktivitas primer yang tinggi pada tambak polikultur rumput laut dengan ikan bandeng menghasilkan produksi Gracilaria sp. yang lebih tinggi dibanding tambak polikultur rumput laut dengan udang.Pond productivity is influenced by primary productivity, which depends on the dynamic balance of temperature, salinity, oxygen, phosphate, and nitrate content. High primary productivity values increase the environmental carrying capacity for the growth of seaweed, milkfish, and shrimp. The aims of this study were to determine the relationship between primary productivity and production in polyculture ponds and compare the production results of Gracilaria sp. in polyculture ponds of seaweed with shrimp (RLU) and seaweed with milkfish (RLB). Observations were carried out during 4 months at 10 RLU ponds and 10 RLB ponds in Randusanga Wetan Village, Brebes Regency. The stocking density for was 1-2 fish m-2  for milkfish, 10 shrimp m-2  for tiger prawns and 1 ton ha-1 for seaweed. The feed dose for shrimp was 2% of body weight per day, while milkfish only rely on natural food in the form of microphytobenthos available in the ponds. The primary productivity values in RLB ponds (112.17 ± 41.06 mgC m-3 day-1) and RLU (105.39 ± 29.12 mgC m-3 day-1) did not show significant differences (P<0.05). The correlation between primary productivity and Gracilaria sp. production is quite strong, which is 76% in polyculture with milkfish, and 61% in polyculture with shrimp. However, the correlation between primary productivity and milkfish and tiger prawn production is low (10%). The RLB ponds produced higher quantity of Gracilaria sp. (8,885 kg ha-1 cycle-1) compared to RLU ponds (7,203 kg ha-1 cycle-1). In polyculture with seaweed, milkfish production was 688 kg ha-1 cycle-1, and production of shrimp was 593 kg ha-1 cycle-1. High primary productivity in polyculture ponds of seaweed and milkfish resulted in a higher production of Gracilaria sp. compared to that of seaweed and shrimp polyculture ponds.
Co-Authors - Desrina, - - Humaidi Abdul Ghani Agus Hartoko Alfabetian Condro Haditomo Angga Dwi Hernanto, Angga Dwi Bahari Sony Atmaja Bosma, Roel Bosma, Roel H. Caesa, Genio Citra Ayu Furi Danang Saputro Dhimas Andreyan Diyah Retnosari Fajar Basuki Fifiana Zulaekah Fitarani, Novia Haeruddin Haeruddin Indah Susilowati Johannes Hutabarat Kusuma, Winanda Adi Lansbergen, Romi Lestari L. Widowati Lestari Lakhsmi Widowati Lestari Lakhsmi Widowati Lusi Dianti Muhammad Rizky Hasan Nauta, Reinier Nugroho, Herwindy Bayu Pangestika, Putri Riana Pinandoyo Pinandoyo Prasdicko Haryanto Rahmawati, Amelia Rahmawati, Vira Rizqi Rosa Amalia Rosa Amalia Saesar Agung Trawanda Sarjito - Schrama, Johan Simon Giando Sinaga, Simon Giando Slamet Budi Prayitno Sri Rejeki Sri Rejeki Suradi Wijaya Saputra Tegar Abdul Basith Titik Susilowati Tri Winarni Agustini Tri Winarni Agustini Trienes, Yoni Tristiana Yuniarti Vivi Endar Herawati Yundari, Yundari