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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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Pengaruh Derajat Keasaman (pH) terhadap Pertumbuhan Bakteri Toleran Kromium Heksavalen dari Sedimen Mangrove di Muara Tukad Mati, Bali Ibnu Fajar; 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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Abstract

The acidity (pH) is an important factor in bacterial growth, this affects the high and low density of the bacteria produced. The minimum and maximum pH values for bacterial growth are generally 4-9, but the optimal pH ranges from 6.5-7.5. This research aims to determine the effect of pH on the growth of hexavalent chromium or Cr(VI) tolerant bacterial isolates from mangrove sediments in Muara Tukad Mati. This research was conducted at the Laboratory of Fisheries, Faculty of Marine Affairs and Fisheries, Udayana University in March 2021. The method used in the research was the experimental method by giving four different pH treatments, namely pH 3, 5, 7, and 9. The stages of the study included preparation of the research sample, creation of growth media, preparation of inoculum, and measurement of growth of bacterial isolates, then analyzed descriptively in the form of pictures and graphics. It is known that the five bacterial isolates can grow well in a pH range of 5-7. Bacterial isolate A reached the optimal value at pH 7, while bacterial isolate B, C, D, and E reached the optimal value in the pH range 5-7. Based on the range of pH values in the growth media, the five bacterial isolates were included as acidophilic microbes that were able to live at pH 5 and mesophilic microbes that were able to live at pH 5.5-8.0.
Perbandingan Kandungan Logam Berat pada Sedimen di Kawasan Hutan Mangrove Perancak dan Tahura Ngurah Rai Yosua Febriyanto; 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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Abstract

Mangrove ecosystem is one of the coastal ecosystems which is greatly influenced by human activities around it. The Perancak mangrove forest area has unique characteristics with the condition of its water bodies being influenced by the tides of the Bali Strait. In addition, the Tahura Ngurah Rai mangrove forest area is a mangrove area located in the city center where there are many human activities that can produce household waste, industrial waste and so on. This study aims to determine the heavy metal content of mangrove sediments and the comparison of heavy metal content of mangrove sediments. The method used in this research is descriptive method. Meanwhile, the data collection process was carried out using purposive sampling method. Samples were measured using the spectrophotometric method with the IPC tool. The results of heavy metal measurements in Perancak Mangrove sediments for Pb ranged from 30.3 mg/L and in Tahura Ngurah Rai Mangrove sediments for Pb ranged from 59,9 mg/L. While the heavy metal content of Cd not detecded. Then the heavy metal measurements in Perancak Mangrove sediments for Hg ranges from 11 mg/L and in Tahura Ngurah Rai Mangrove sediments for Pb ranged from 22,1 mg/L . The heavy metal content in the Perancak Mangrove sediment is lower than the heavy metal content in the Ngurah Rai Mangrove sediment.
Studi Perubahan Kandungan Histamin Ikan Lemuru (Sardinella lemuru) Pada Kondisi Suhu Ruang/Terbuka Wafi Ayodhya Satyadharma; Ima Yudha Perwira; I Wayan Darya Kartika
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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Examination the quality of freshness of fish is important to increase the level of fish consumption (protein consumption) of Indonesian society. If the handling is not correct, the protein contained in fish will be used by microorganisms to reproduce and reduce the quality of the fish and the formation of histamine content. The purpose of this study is to determine the histamine content in sardine fish and the relationship between the histamine content in sardine fish that were left at room temperature. This research is conducted by taking sardine fish samples at PPN Kedonganan, then leaving them on a 2 hour time scale. After settling the sardine fish, the histamine content testing using the ELISA method. Histamine content in sardines (Sardinella lemuru) left for 2 hours ranges from 3.1-39.9 ppm, histamine content in sardines (Sardinella lemuru) which is left for 4 hours ranges from 30,0-40,5 ppm, and histamine content in sardines (Sardinella lemuru) which were left for 6 hours ranged from 42.1-100 ppm.The increase in histamine content in sardine fish (Sardinella lemuru) can be affected by room temperature, the longer the sardine fish is left at room temperature, the histamine content in sardine fish can increase.
Bioakumulasi Timbal (Pb) pada Bivalvia (Anadara antiquata, Anadara granosa dan Perna viridis) dari Perairan Lekok, Pasuruan Devi Ulinuha; Ima Yudha Perwira
Journal of Marine and Aquatic Sciences Vol 8 No 2 (2022)
Publisher : Fakultas Kelautan dan Perikanan Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/jmas.2022.v08.i02.p02

Abstract

Lead is one of inorganic material causes pollution in waters that have a high level of toxicity for organisms. Lead pollution in waters can be accumulated by several water organisms, such as Bivalves. Bivalves are type of shellfish that can accumulate heavy metals. This study aimed to know the bioaccumulation of Lead on the Bivalves (Anadara antiquata, Anadara granosa dan Perna viridis) found in Lekok water (Pasuruan, Jawa Timur). The amount of Lead in the water, sediment and Bivalves was measured by using Atomic Absorption Spectro-photometer (AAS). The bioaccumulation of Lead on the Bivalves was analyzed by using Bioconcentration Factor (BCF). The result showed that amount of Lead in the water and sediment were 0,356 mg/L and 21,245 mg/kg, respectively. The BCF value of Lead on the Bivalves of Lekok waters were <30 indicating low accumulation level.
Pengukuran Kandungan Senyawa Polisiklik Aromatik Hidrokarbon (PAH) di Pesisir Perairan Celukanbawang, Bali Putra pratama; Ima Yudha Perwira; Alfi Hermawati Waskita Sari
Current Trends in Aquatic Science Vol 7 No 1 (2024)
Publisher : Program Studi Manajemen Sumberdaya Perairan, Fakultas Kelautan dan Perikanan, Universitas Udayana

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Abstract

This study aims to determine the content of Polycyclic Aromatic Hydrocarbons (PAH) in seawater in Celukanbawang waters, Bali. Industrial activities that take place in Celukanbawang waters can affect the quality of the water and marine life around it, and can even have an impact on the environmental pollution of the waters. Data collection was carried out in February-March 2020. The method used in this research is descriptive method, with the seawater sampling method carried out randomly (random sampling) with the number of stations studied as many as 6 stations with a distance of 100 meters from the shoreline. This study also measured DO levels, temperature, pH, and salinity which were carried out directly at the research location and at the Fisheries Science Laboratory, Faculty of Marine Affairs and Fisheries, Udayana University. The results showed that the average value of Polycyclic Aromatic Hydrocarbons (PAH) from the six stations was 0.021 (mg / L). This shows that the levels of Polycyclic Aromatic Hydrocarbons (PAH) in Celukanbawang waters have exceeded the quality standard threshold in accordance with the Regulation of the Governor of Bali No. 16/2016.
Profil Bahan Organik Pada Air di Bagian Hilir Sungai Jangga, Kabupaten Karangasem, Bali. I Gede Duta Sunaryuga; Ima Yudha Perwira; I Ketut Wija Negara
Current Trends in Aquatic Science Vol 7 No 1 (2024)
Publisher : Program Studi Manajemen Sumberdaya Perairan, Fakultas Kelautan dan Perikanan, Universitas Udayana

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Abstract

Jangga river is one of the major rivers that pass through Karangasem Regency. The Jangga river flows from the Padangkerta Village (upstream), the Subagan Village and ends in the Tumbu Village at the downstream. Organic matter has an important role for the productivity of water ecosystems. The accumulation of organic matter in the mouth of the river can threaten the ecological system and reduce the quality of the river waters. This study aims to determine the level of pollution and water quality in the Jangga River, Karangasem, Bali. The method used in this study is a quantitative descriptive method. Parameters measured were BOT, ammonia, TSS, TDS, DO, pH, temperature and turbidity. The results showed that the condition of the waters in the Jangga River in general is still classified as unpolluted according to Government Regulation Number 22 of 2021, concerning the implementation of environmental protection and management.
Analisis Kelimpahan Mikroplastik pada Organ Insang dan Usus Ikan Nila (Oreochromis niloticus) di Perairan Tukad Badung, Bali: Analysis of Microplastic Abundance in the Gills and Intestines Organs of Tilapia Fish (Oreochromis niloticus) in Tukad Badung Waters, Bali Juliano, Kevin Wanang; Perwira, Ima Yudha; Saraswati, Ni Luh Gede Rai Ayu
JFMR (Journal of Fisheries and Marine Research) Vol. 9 No. 3 (2025): JFMR on November
Publisher : Faculty of Fisheries and Marine Science, Brawijaya University, Malang, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jfmr.2025.009.03.6

Abstract

Mikroplastik adalah sampah plastik yang berukuran sangat kecil yaitu 1 μm – 5 mm dan sering ditemukan di permukaan kolom atau dasar badan air. Mikroplastik yang telah terakumulasi ke lingkungan akan berpotensi mengkontaminasi biota akuatik dikarenakan proses rantai makanan yang terjadi pada lingkungan tersebut. Tujuan dari penelitian ini adalah untuk menganalisis kelimpahan dan karakteristik mikroplastik yang ditemukan pada organ insang dan usus ikan nila di perairan Tukad Badung, Bali. Penelitian ini dilaksanakan di Tukad Badung pada bulan Desember 2023 hingga Maret 2024. Sampel ikan nila diambil dari 3 titik yang berbeda dengan metode purposive sampling. Pengamatan partikel mikroplastik dilakukan dengan menggunakan mikroskop stereo dan bantuan software ImageJ. Hasil penelitian menunjukkan bahwa mikroplastik lebih banyak ditemukan pada organ usus (0,077 ± 0,035 partikel/g) daripada organ insang (0,051±0,024 partikel/g). Kelimpahan mikroplastik menurut bentuknya terdapat bentuk fiber dan fragmen. Kelimpahan mikroplastik menurut ukuran terdapat ukuran < 0,5 mm hingga > 3 mm, sedangkan kelimpahan mikroplastik menurut warna terdapat warna hitam, merah, biru, hijau, putih. Dominasi mikroplastik pada organ usus lebih tinggi dari organ insang. Hal ini menunjukkan lebih tingginya mekanisme biomagnifikasi daripada mekanisme biokonsentrasi mikroplastik.   Microplastic is small-size plastic waste, ranging from 1,0 μm to 5,0 mm, and widely found in the water column. Microplastics accumulation in the environment lead to the contamination the of aquatic organisms through food chain in the environment. This study aims to observe the abundance and characteristic of microplastics found on the gill and intestine of Tilapia caught in Tukad Badung, Bali. This study was carried out from December 2023 to March 2024. Tilapia fish sample was collected from 3 different station using purposive sampling method. Microplastic particle observation was performed by using Stereo Microscope and ImageJ Software. The results showed that microplastics were more abundant in the intestine (0.077 ± 0.035 particles/g) than in the gills (0.051 ± 0.024 particles/g). The abundance of microplastics based on their shape was in the form of fibers and fragments. The abundance of microplastics based on size ranged from <0.5 mm to >3 mm, while the abundance of microplastics based on color ranged from black, red, blue, green, and white. The dominance of microplastics in the intestine was higher than in the gills, indicating a higher biomagnification mechanism than the microplastic bioconcentration mechanism.
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