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All Journal Jurnal Gamma Journal of Marine and Aquatic Sciences Bumi Lestari Journal of Environment JFMR (Journal of Fisheries and Marine Research) Current Trends in Aquatic Science
Ima Yudha Perwira
Program Studi Manajemen Sumberdaya Perairan, Fakultas Kelautan Dan Perikanan, Universitas Udayana
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Profil Kandungan Fosfat pada Air di Daerah Aliran Sungai (DAS) Tukad Ayung, Bali Novita Wulandari; Ima Yudha Perwira; Ni Made Ernawati
Current Trends in Aquatic Science Vol 4 No 2 (2021)
Publisher : Program Studi Manajemen Sumberdaya Perairan, Fakultas Kelautan dan Perikanan, Universitas Udayana

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Ayung River is the longest river in the Bali Island. There are a lot of antropogenic activities around this area. However, there is lack information about the nutrient (Phosphate) level in the water of this river. This study was aimed to observe the amount of nutrient (Phosphate) in the water of Ayung River. Water sampling was carried out in the upstream, middle stream, and downstream of Ayung River from December 2019 to January 2020. The phosphate amount was measured using Hanna HI713 reagent, Dissolved Oxygen (DO) of water was measured using Winkler method, pH of water was measured using digital pH meter, and water temperature was measured using Thermometer. The result showed that phosphate of the water was ranging from 0.3 to 0.9 mg/L. The amount of phosphate tends to be higher in the evening (0.9 mg/L) compared to that in the morning time (0.4 mg/L). The phosphate increase rate of middle stream to the downstream was higher (0.011 mg/L.km) compared to that of upstream to the middle stream (0.009 mg/L.km).
Tingkat Dekomposisi Bahan Organik pada Sedimen Tambak Udang Vanname di Desa Musi, Kecamatan Gerokgak, Buleleng, Bali Ahmad Fauzi; Ima Yudha Perwira; Made Ayu Pratiwi
Current Trends in Aquatic Science Vol 3 No 2 (2020)
Publisher : Program Studi Manajemen Sumberdaya Perairan, Fakultas Kelautan dan Perikanan, Universitas Udayana

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Penelitian ini bertujuan untuk mengetahui tingkat dekomposisi bahan organik dalam sedimen tambak udang Vanname. Penelitian dilaksanakan di desa Musi, Kecamatan Gerokgak, Kabupaten Buleleng, Bali. Kegiatan budidaya udang vannamei menghasilkan bahan organik yang terus-menerus terakumulasi pada substrat dasar tambak, sehingga dapat mengurangi kualitas media budidaya dan kualitas perairan di sekitarnya. Penelitian ini dilaksanakan pada bulan April 2019. Sampel sedimen dan sampel air dikumpulkan dari 10 kolam yang dipilih secara acak. Pengambilan sampel sedimen dilakukan melalui saluran pembuangan central/tengah. Sedangkan sampel air diambil secara langsung pada tambak. Karbon organik (OC) diukur dengan menggunakan Metode Walkley and Black, Total Nitrogen (TN) diukur menggunakan Metode disltilasi Kjeldahl secara titrasi, Total Bakteri (TB) diukur menggunakan Metode Total Plate Count (TPC) dengan tekhnik spread plate. COD air diukur menggunakan metode titrimetri berbasis permanganat, sedangkan DO diukur menggunakan Metode Winkler. PH air diukur menggunakan pH meter, dan suhu diukur menggunakan termometer. Hasil penelitian menunjukkan bahwa rata-rata Karbon Organik (OC) dalam sedimen adalah 20,2%, Total Nitrogen (TN) 1,0%, dan Total Bakteri (TB) 15 × 106 CFU/gram. Nilai rasio C/N pada sedimen didapatkan sebesar 22. Rata-rata COD air adalah 18,3 mg / L, DO adalah 7,4 mg / L, pH 6,8, dan suhu 30,2oC. Hasil ini menunjukkan bahwa dekomposisi bahan organik dalam sedimen tambak udang Vannamei di desa Musi dalam kondisi seimbang.
Kandungan Nitrat dan Fosfat pada Air di Sungai Telagawaja Kabupaten Karangasem, Bali Deta Miriam Br Sitepu; Ima Yudha Perwira; I Wayan Darya Kartika
Current Trends in Aquatic Science Vol 4 No 2 (2021)
Publisher : Program Studi Manajemen Sumberdaya Perairan, Fakultas Kelautan dan Perikanan, Universitas Udayana

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This study measured the amount of nitrates and phosphates in thewater of Telagawaja river. The water of this river is used for hygiene sanitation necessity of the people living in the surrounding area. Many antropogenic activities are exists in this area, such as: rafting and hotel, farming, and animal husbandry. This study aimed to know the status of nitrate and phosphate nutrient in the water based on the Indonesia Government Regulation Number 82 of 2001. The amount of nitrate was measured using Salifert Nitrate KIT, while phosphate was measured using Hanna HI 713 KIT. Measurement was also carried out on the total organic matter, dissolved solid, suspended solid, turbidity, dissolved oxygen, water acidity (pH), and temperature. The results showed that amount of nitrate (0.2-0.9 mg/L) and phosphate (0.1-0.4 mg/L) in the water of Telagawaja River was below the tolerance limit for all of usage class. The water of the center and the downstream might be used for fish culture, animal husbandry, irrigation water, and other usages in this standard.
Analisis Kandungan Karbon, Nitrogen Dan Jumlah Total Bakteri Pada Substrat Dasar Tambak Udang Vannamei (Litopenaeus vannamei) Pada Pertengahan Masa Tanam Di Desa Sanggalangit, Gerokgak, Buleleng, Bali. Nopita Sari Nadapdap; Ima Yudha Perwira; Ni Made Ernawati
Current Trends in Aquatic Science Vol 3 No 1 (2020)
Publisher : Program Studi Manajemen Sumberdaya Perairan, Fakultas Kelautan dan Perikanan, Universitas Udayana

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This study aims to determine the content of organic carbon, total nitrogen (TN), the total number of bacteria (TB) and the level of decomposition of organic matter in the bottom substrate of shrimp vannamei ponds (Litopenaeus vannamei) in Sanggalangit Village, Gerokgak District, Buleleng, Bali. Organic matter that is constantly accumulating on the pond bottom substrate can reduce the quality of the water. Data was collected in February-May 2019 using purposive sampling method with the number of ponds studied as many as 9 ponds. This research uses quantitative descriptive methods. Measurement of total nitrogen is done using the Indophenol method, organic carbon using the Walkley and Black method and total bacteria using the TPC (Total Plate Count) method. The results of this study obtained an average value of 29.34% organic carbon content, 1.15% total nitrogen and 15.2×106 total bacteria. The level of decomposition of organic matter in vannamei shrimp ponds (Litopenaeus vannamei) in Sanggalangit Village was included in the balanced category (C/N = 29.37). The measured C/N ratio indicates that the decomposition process of organic matter is going well so that the exchange of nutrients from the substrate to the pond water media is going well in supporting the pond productivity.
Evaluasi Kualitas Air dan Kondisi Lingkungan pada Lokasi Budidaya Rumput Laut (Eucheuma cottonii) di Perairan Pantai Pandawa, Bali Devita Eka Saputri; Ima Yudha Perwira; Ayu Putu Wiweka Krisna Dewi
Current Trends in Aquatic Science Vol 4 No 2 (2021)
Publisher : Program Studi Manajemen Sumberdaya Perairan, Fakultas Kelautan dan Perikanan, Universitas Udayana

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This research aimed to observe water quality and environmental conditions in the location of seaweed (Eucheuma cottonii) cultivation area in Pandawa Beach Waters. The research was conducted from December 2019 to January 2020. Water sampling was carried out at 3 different stations in the west side of Pandawa Beach Waters. Measuring temperature using a thermometer, salinity using a refractometer, water pH using a pH meter, and Dissolved Oxigen (DO) of water were measured using the Winkler method. Nitrate and phosphate in the water was measured using Salifert KIT. The result showed that water temperature was raning from 28.7 to 30oC, salinity was from 30 to 31 ppt, pH was from 7.5 to 7.66, and DO was from 5.60 to 6.03 mg/L. Analysis of nitrate showed range from 1.52 to 1.77 mg/L, while phosphate was ranging from 0.22 to 0.32 mg/L. These results showed that water quality in the location is suitable for the cultivation of seaweed.
Tingkat Dekomposisi Bahan Organik Pada Substrat Dasar Tambak Udang Vannamei (Litopenaeus vannamei) di Desa Patas Bagian Timur, Buleleng, Bali Yuli Andriani Situngkir; Alfi Hermawati Waskita Sari; Ima Yudha Perwira
Current Trends in Aquatic Science Vol 2 No 2 (2019)
Publisher : Program Studi Manajemen Sumberdaya Perairan, Fakultas Kelautan dan Perikanan, Universitas Udayana

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Abstract

Budidaya udang vannamei secara intensif memberikan konsekuensi peningkatan bahan organik yang diakibatkan oleh sisa pakan dan kotoran udang. Penelitian ini bertujuan untuk mengetahui tingkat dekomposisi bahan organik substrat dasar tambak udang vannamei intensif yang ada di Desa Patas Bagian Timur Buleleng. Sampel substrat dasar tambak diambil dari 8 petak tambak yang ada di Desa Patas Bagian Timur Buleleng. Sampel tersebut kemudian dianalisa kandungan C-organik, nitrogen total dan jumlah total bakterinya. Kandungan C-organik dianalisa dengan menggunakan metode Walkley and Black, kandungan nitrogen total dianalisa menggunakan metode Indophenol dan jumlah total bakteri dianalisa dengan menggunakan metode Total Plate Count. Berdasarkan hasil analisa diketahui bahwa rata-rata C-organik, nitrogen total dan jumlah total bakteri masing-masing sebesar 29,4%, 1,6%, dan 5,8×105 CFU/ml. Dari hasil tersebut diketahui nilai rasio C/N sebesar 20,33 dengan kata lain tingkat dekomposisi pada substrat dasar tambak dalam kondisi seimbang. Analisa korelasi menunjukkan bahwa terdapat hubungan antara rasio C/N dengan jumlah total bakteri (R2=0,7237). Kondisi kualitas air berada dalam kondisi yang optimal sesuai dengan baku mutu kualitas air menurut PERMEN-KP RI Nomor 75 Tahun 2016 tentang Pedoman Umum Pembesaran Udang Windu (Penaeus monodon) dan Udang Vannamei (Litopenaeus vannamei).
Profil Kandungan dan Kelimpahan Mikroplastik pada Ikan Kakap Merah (Lutjanus sp.) yang Didaratkan di PPI Kedonganan, Bali Gebi Gresi Martina Panjaitan; Ima Yudha Perwira; Ni Putu Putri Wijayanti
Current Trends in Aquatic Science Vol 4 No 2 (2021)
Publisher : Program Studi Manajemen Sumberdaya Perairan, Fakultas Kelautan dan Perikanan, Universitas Udayana

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This study aimed to determine the microplastic content and abundance on the stomach of Red Snapper (Lutjanus sp.) landed at Kedonganan Fishery Port (PPI), Bali. This study was conducted at The Kedonganan Fishery Port (PPI), Bali from November to December 2019. The fish samples used were: Lutjanus Malabaricus and Lutjanus Gibbus. The microplastic particles were extracted from the gut of the fish before analysis (type and amount of particles). The result showed that 77% of Red Snapper (Lutjanus sp.) landed at the PPI Kedonganan were contaminated by microplastics particles. The abundance of microplastics in Lutjanus malabaricus species was 7.86 particle/fish, while in the Lutjanus gibbus species was 4.46 particle/fish. The advances analysis showed that there were 3 types of microplastic particles found in this study: fragments (75 particles), film (45 particles), and fiber (65 particles).
Bahan Organik Terlarut dan Parameter yang Mempengaruhinya di Bagian Hilir Tukad Mati, Badung, Bali Muhammad Sholihin; Ima Yudha Perwira; Ni Made Ernawati
Current Trends in Aquatic Science Vol 4 No 1 (2021)
Publisher : Program Studi Manajemen Sumberdaya Perairan, Fakultas Kelautan dan Perikanan, Universitas Udayana

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This research aimed to determine the amount of dissolved organic matter (BOT) and its influencing factors in the downstream part of the Tukad Mati, Badung, Bali. The research was conducted in the downstream of Tukad Mati from July to September 2019. The parameters measured were BOT, TSS, Turbidity, TDS, NO3, DO, pH, and Temperature. The results showed the level of increase in BOT in the morning with an average of 22.1 mg/l and afternoon 24.3 mg/l had a difference of 2.2 mg/l, with a percentage increase of 9.95% . TDS measurement results in the morning and evening have an average value of 419 mg/l and 423 mg/l with a difference of 4 mg/l with a percentage decrease of 0.95%. The results of nitrate measurements in the morning and evening have an average value of 3.5 mg /l and 3.8 mg/l with a difference of 0.3 mg/l with a decrease percentage of 8.6%. The results of TSS measurements in the morning and evening had an average value of 8.9 mg/l and 11.8 mg/l with a difference of 11.8 mg/l with a reduction percentage of 32.5%.
Tingkat Dekomposisi Bahan Organik pada Sedimen di Tukad Daya Desa Bungkulan Kabupaten Buleleng, Provinsi Bali Dresti Ngurah Dwi Saputra; Ima Yudha Perwira; Alfi Hermawati Waskita Sari
Current Trends in Aquatic Science Vol 5 No 1 (2022)
Publisher : Program Studi Manajemen Sumberdaya Perairan, Fakultas Kelautan dan Perikanan, Universitas Udayana

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The purpose of this study were to know decomposition rate in the sediment, the ratio of C/N, and the supporting parameters (Ammonia, Nitrate and pH) in the sediment in Daya River. Sediment samples were taken from 6 points in Daya River by purposive sampling. Sediment samples were analyzed for organic carbon, total nitrogen, total bacterial number, ammonia, nitrate, and pH. The results showed that organic carbon content in the sediment was 27.96%, total nitrogen content was 1.12%, and total bacterial number was 7.1 x105 CFU/ml. Based on this result, the C/N ratio is around 28.71 indicating balance condition of decomposition. The average value of ammonia, nitrate and pH were: were 1.21 mg/L, 0.92 mg/L, 7.39, respectively. The supporting parameters in Daya River are pH and Nitrate in the sediment in Tukad Daya in optimal conditions to support the decomposition of organic matter in Daya River. Ammonia in the sediment in Daya River exceeds the optimal limit for living organisms during the decomposition process of organic matter.
Jumlah Total Bakteri dan Nutrien Nitrogen Pada Sedimen Mangrove Taman Hutan Raya (TAHURA) Ngurah Rai, Bali Hanna Santika Tinambunan; Ima Yudha Perwira; Ni Made Ernawati
Current Trends in Aquatic Science Vol 5 No 1 (2022)
Publisher : Program Studi Manajemen Sumberdaya Perairan, Fakultas Kelautan dan Perikanan, Universitas Udayana

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This research aims to find out the total amount of bacteria and nitrogen nutrients found in mangrove sediments in Ngurah Rai Forest Park (TAHURA), Bali. Sampling was conducted in 4 locations, namely from estuary Mertasari, estuary Tukad Mati, estuary Jimbaran, and Nuda Dua, where 1 location consists of 3 sampling points. The research was conducted at the Fisheries Laboratory of the Faculty of Marine and Fisheries of Udayana University in December 2020. The research phase is to prepare research materials, take measurements of ammonia, nitrates, total bacteria, pH, TDS, and electrical conductivity (EC). Measuring pH and TDS/EC using a pH meter and TDS/EC meter. Determining the total number of bacteria using the Total Plate Count. The results showed that the total number of bacteria by 33 × 107 CFU / g and while in nitrogen nutrients obtained from several parameters that have a result in nitrates of 2.8 mg / L, ammonia of 21.5 mg/L, dissolved solids (TDS) of 2100 mg/L,acidity (pH) of 6.6,electrical conductivity (EC) of 4259 ?S/cm. The fertility of mangrove ecosystem in Ngurah Rai Bali Forest Park (TAHURA) can be known from the measurement of physical and chemical parameters in sediment that has been done. Where the content of nitrogen nutrients, such as in the parameters of ammonia and nitrate content contained in mangrove sediment is not classified as polluting the waters because it is still in the category of safe, where the material of organik in sediment can be a source of fertility for mangrove growth.
Co-Authors Ahmad Fauzi Alfi Hermawati Waskita Sari Alfi Hermawati Waskita Sari Anisa Oka Dina Ayu Putu Wiweka Krisna Dewi Deta Miriam Br Sitepu Devi Ulinuha Devita Eka Saputri Dewa Ayu Angga Pebriani Dresti Ngurah Dwi Saputra Farhan Danu Fauzan Gebi Gresi Martina Panjaitan Hanna Santika Tinambunan I Gede Duta Sunaryuga I Ketut Wija Negara I Ketut Wija Negara Ibnu Fajar Ilham Misbakudin Al zamzami Juliano, Kevin Wanang Kartika, I Wayan Darya Kintanijaya Kintanijaya Made Ayu Pratiwi Mila Jeniarti Muhammad Sholihin Ni Luh Sari Risna Dwi Jayanti Ni Made Ernawati, Ni Made Ni Putu Putri Wijayanti Ni Putu Shinta Sainitha Dewi Ni Putu Wira Argiantini Nita Hayani Br. Tarigan-Sibero Nopita Sari Nadapdap Novita Wulandari Nyoman Dati Pertami Putra pratama Rani Ekawaty Rizki Andrianto Saraswati, Ni Luh Gede Rai Ayu Sri Samsundari Syahriyani Purba Theresia Alvianita Muga Tomtommy Haykal Wafi Ayodhya Satyadharma Yosua Febriyanto Yuli Andriani Situngkir