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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

Author-ID : 285975

Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Earth & Planetary Sciences Education Energy Engineering Environmental Science Other

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Phytoplankton Diversity as Ecological Indicator in Jimbaran Bay Waters Perwira, Ima Yudha; Ulinuha, Devi
Journal of Environment Vol 1 No 1
Publisher : Graduate Study of Environmental Sciences, Postgraduate Program of Udayana University

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A study was carried out to evaluate the ecological condition in Jimbaran Bay Waters by using Phytoplankton Diversity Index. The study was conducted at Balangan, Pemuda, Jimbaran, Kedonganan, Kelan and Segara Beach located in Jimbaran Bay. Shannon-Wiener diversity index was used to analyze the ecological condition, supported by analysis on water quality including dissolved oxygen (DO), biological oxygen demand 5 days (BOD5), water pH, and water salinity. There were 51 species of phytoplankton classified to 5 classes had been observed from this study: Bacillariophycae, Cyanophyceae, Zygnemophyceae, Dinophyceae, and Chlorophyceae. Balangan beach showed higher diversity index (H) and evenness index (E) (H = 1.19; E = 0.29) compared to the other site (Pemuda: H = 0.89, E = 0.25; Jimbaran: H = 0.89, E = 0.26; Kedonganan: H = 0.96, E = 0.28; Kelan: H = 0.85, E = 0.20; and Segara: H = 0.91, E = 0.33). However, overall ecological condition showed diversity index more than 1 (H = 1.44; E = 0.27). Measurement of water quality showed that the highest quality of water was shown by Balangan Beach (DO 5.2 mg/L, pH 7.2, salinity 29 ppt, and BOD5 0.9 mg/L), while the lowest was shown by Kelan Beach (DO 4.2 mg/L, pH 7.2, salinity 29 ppt, and BOD5 2.9 mg/L). Result of the study showed that ecological status of Jimbaran Bay Waters was having moderate diversity, sufficient productivity, and medium ecological pressure (pollution).

Study on Mollusk and Algae or Phytoplankton Community in Southeast Waters of Bali Ulinuha, Devi; Perwira, Ima Yudha
Journal of Environment Vol 1 No 1
Publisher : Graduate Study of Environmental Sciences, Postgraduate Program of Udayana University

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A study was carried out to observe the relation between mollusk with algae or phytoplankton in southeast waters of Bali. The study was conducted at Mertasari, Sindhu, Serangan, Purnama, and Kethewel beach. Shannon-Wiener diversity index was used to analyze the ecological condition, supported by analysis on water quality including dissolved oxygen (DO), biological oxygen demand 5 days (BOD5), water pH, and water salinity. There were 34 species of phytoplankton found in this study. The most predominant phytoplankton species in each beach were Navicula sp at Mertasari, Nitzschia sp at Sindhu, Pseudo-nitzschia sp at Purnama, Chaetoceros sp at Kethewel. Observation on macro algae showed that Ulva sp was to be the most predominant species in Serangan, Mertasari, and Sindhu beach (17.95, 16.25, and 17.81%). In mollusk observation, gastropod groups showed to be higher number than bivalve group. Nassarius sp showed to be the most predominant in Serangan beach (13.33%), while Ruditapes sp was predominant in Mertasari and Sindhu beach (11.59% and 14.81%). The highest diversity index of phytoplankton was shown by Kethewel beach (H = 1.35), while the lowest was shown by Shindu beach (H = 0.95). The highest diversity index of macroalgae was shown by Serangan beach which showed H = 2.08, while the lowest was shown by Purnama beach which showed H = 0.69. Serangan beach showed the highest diversity index (H = 2.72) with E = 0.66 compared to another locations, while Kethewel beach showed the lowest diversity index (H = 0.69 and E = 1). There was a relation between the existences of gastropod as the highest number of mollusk and Ulva sp as the gastropod feed.

KAJIAN DAMPAK PENCEMARAN LOGAM BERAT DI DAERAH SEKITAR LUAPAN LUMPUR SIDOARJO TERHADAP KUALITAS AIR DAN BUDIDAYA PERIKANAN Sri Samsundari; Ima Yudha Perwira
Jurnal Gamma Vol. 6 No. 2 (2011): Maret
Publisher : Jurnal Gamma

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Sri Samsundari1 & Ima Yudha Perwira21Staf Pengajar & 2Alumni Jurusan Budidaya Perairan, Fakultas Pertanian-PeternakanUniversitas Muhammadiyah MalangAlamat Korespondensi : Jl. Raya Tlogomas 246 MalangEmail: srisamsundari@umm.ac.idABSTRACTSidoarjo as one potential area of aquaculture ponds very wide. Aquaculture sector can contributelarge revenues for Sidoarjo regency, but with the emergence of mudflow case PT. Lapindo led to adecline in production in the aquaculture sector. One of the factors that can affect the productiondecline is the pollution of mudflow PT. Lapindo, which is heavy metal. The purpose of this studywas to conduct a study of the impact of the mudflow events in the District Sidoarjo for aquacultureactivities. Samples were tested heavy metal content in this study is the gill and shrimp meat andpond water samples and water reservoir. While heavy metals identified are lead (Pb), Mercury (Hg),Copper (Cu) and cadmium (Cd). Observations on heavy metal content of pond water samples andorgan gill and shrimp meat showed a relatively high number compared with the water quality standardfor production and consumption. In the area range first (5 km), the highest heavy metal contentsare shown in black tiger shrimp gill samples, the 0255 ± 0029 ppm (Lead), 0142 ± 0041 ppm(Mercury), 0694 ± 0048 ppm (Copper) and 0035 ± 0007 ppm (Cadmium). While in the area of thesecond range (10 km), the metal content highest weight indicated on the shrimp gill samples, namely0124 ± 0009 ppm (Lead) 0089 ± 0018 ppm (Mercury), 0356 ± 0013 ppm (Copper) and 0023 ±0004 ppm (Cadmium). In the third range area (15 km), similar results are shown in sample Gill 0049± 0007 ppm (Lead), 0062 ± 0015 ppm (Mercury), 0091 ± 0018 ppm (Copper) and 0019 ± 0006ppm (Cadmium). The farther the distance from the center spurt pond, the less content heavy metalswas observed. However, the heavy metal content has been identified the majority of the area wasalso the third range has exceeded the water quality standard as well as production for consumptionexcept Lead (Pb) and Cadmium (Cd) on samples of pond water and mercury (Hg) in the samplesgills and shrimp meat.Keywords: heavy metals, aquaculture, shrimp

Dekomposisi bahan organik pada sedimen di Tukad Mati dan Tukad Badung, Bali Ima Yudha Perwira; Rani Ekawaty; Alfi Hermawati Waskita Sari; Devi Ulinuha
Journal of Marine and Aquatic Sciences Vol 5 No 2 (2019)
Publisher : Fakultas Kelautan dan Perikanan Universitas Udayana

The sediment properties of Mati and Badung River, Bali were observed in this study. This study was aimed to know the relation between carbon, nitrogen and total bacterial number in the sediment of those rivers. This study was carried out in Mati and Badung River located in Southern part of Bali, Indonesia. Total carbon (TC), total nitrogen (TN), and total bacterial number of the sediment were observed in this study. Slow stirring method was used to estimate the total bacterial number in sediment, based on their environmental DNA intensity after agarose gel electrophoresis. TC of sediment was analyzed by using total carbon analyzer after combustion at 900oC, while TN was analyzed by using indophenol blue method after digested using Kjeldahl at 420oC for 1.5 hours. The result showed that TC of sediment in the Mati and Badung River were 6,100 and 7,000 mg/kg, respectively. TN of sediment in the Mati and Badung River were 380 and 440 mg/kg, respectively. The pH and electrical conductivity (EC) of sediment in the Mati River were 6,88 dan 0,10 µs/cm, while in the Badung River were 6,80 dan 0,11 µs/cm. Total bacterial number in the Mati river was lower (4.8 × 108 cell /g) than that in the Badung river (3.8 × 108 cell/g). The high value of R2 between total bacterial and TC (0.91), and between total bacterial number and TN (0.83), indicating the high influence of bacteria on the decomposition of organic materials in the sediment.

Tingkat dan laju penurunan kualitas air di DAS Brantas Malang Raya Ima Yudha Perwira
Journal of Marine and Aquatic Sciences Vol 5 No 2 (2019)
Publisher : Fakultas Kelautan dan Perikanan Universitas Udayana

The decrease level of water quality of Brantas Watershed in Malang Raya was observed in this study. The aim of this study was to observe the decrease level of water quality of Brantas Watershed from Batu to Malang City. This study was carried out in the Brantas Watershed of Malang Raya (8 stations: A, B, C, D, E, F, G, and H) for 18,4 Km. The water quality parameters observed in this study were: CODmn (permanganometry), CODcr (CODmn correlation based analysis), dissolved oxygen (DO) (Winkler iodometry), TDS and electrical conductivity (EC) (EC meter), pH (pH meter), and turbidity (Turbidity meter). The result showed the value of CODmn: 1,8-10,2 mg/L, CODcr: 5,6-31,5 mg/L, DO: 4,0-6,1 mg/L, TDS: 204-289 mg/L, EC: 430-617 µS/cm, pH: 7,1-7,6, and turbidity: 2,02-10,30 NTU. There are 3 stations (A, B, and C) with 1st class water quality, 1 station (D) with the 2nd class water quality, and 4 stations (E, F, G, and H) with 3rd class water quality. The decrease of water quality in the Brantas Watershed from Batu to Malang City was up to 3 times with a decrease rate of 2,3 mg/L-1Km-1. The decomposition of organic materials in the water of Batu City and western part of Malang City is relatively better than that of central parts of Malang City which might be caused by the over capacity of recovery (Self-purification mechanism).

Biomarker Histopatologi Hati Ikan Belanak (Mugil cephalus) Sebagai Peringatan Dini Toksisitas Kromium(Cr) di Muara Tukad Badung, Bali Alfi Hermawati Waskita Sari; Ima Yudha Perwira
Journal of Marine and Aquatic Sciences Vol 5 No 2 (2019)
Publisher : Fakultas Kelautan dan Perikanan Universitas Udayana

The impact from the increased discharge of domestic and industrial waste, as well as other human activities, has had a significant negative impact on the quality of water in the TukadBadung River Estuary, which is a natural habitat for mullets (Mugil cephalus). In seeking to understand the response of aquatic organisms to this environmental change, one important biomarker of environmental stress is the histopathological features of fish liver. The measurement of water quality parameters in TukadBadung Estuary showed a normal range of dissolved oxygen (8.07), pH (7.01) and temperature (28.50C). However, the measurement results for the heavy metals chromium (Cr) in Station I (0.086 mg/L), Station II (0.099 mg/L), and Station III (0.099 mg/L) all exceeded the water quality standard threshold, based on the KepMen Negara LH No. 51 Tahun 2004 standard for seawater quality (seawater biota). The results of the observation of histopathological features of the liver organ of mullets (Mugil cephalus) in the TukadBadung Estuary revealed various physical damage, including signs of haemorrhagic, congestion, vascular degeneration, and focal necrosis.

Profil Nitrat dan Fosfat pada Air secara Vertikal di Danau Batur, Bali Ima Yudha Perwira; Nyoman Dati Pertami; Devi Ulinuha; Farhan Danu Fauzan
Journal of Marine and Aquatic Sciences Vol 7 No 1 (2021)
Publisher : Fakultas Kelautan dan Perikanan Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/jmas.2021.v07.i01.p04

The aimed of this study was to determine the reproductive biology aspects of longtail tuna, namely the gonad maturity level, gonadal maturity index, fecundity and length of first maturity. Fish samples were obtained from the catches of fishermen in the Bali Strait which landed at PPP Muncar from December 2018 to February 2019. Gonad maturity level of longtail tuna in December 2018 was mostly found in immature conditions (TKG I). TKG III and IV are most commonly found in February. The highest IKG value was found in February 2019 (0.017). This can be interpreted that lontail tuna experienced peak spawning and was actively reproducing in February. The sex ratio of gray tuna is dominated by male. Fecundity at TKG III ranged from 18,800 to 33,200 grains and at TKG IV of 154,000 grains. The length of first maturity of longtail tuna was 495 mmFL (male) and was 487 mmFL (female).

Biomonitoring Kesehatan Kerang Abalone (Haliotis squamata) Hasil Tangkap di Perairan Mengening, Bali Dengan Pengamatan pada Aktifitas Fagositosisnya Devi Ulinuha; Ima Yudha Perwira
Journal of Marine and Aquatic Sciences Vol 5 No 1 (2019)
Publisher : Fakultas Kelautan dan Perikanan Universitas Udayana

The health level of captive abalone (Haliotis squamata) in Mengening waters, Bali Island, was observed through observation on the phagocytosis activities. This study was aimed to determine the health level of abalone in the Mengening waters influenced by their environmental factors. The method is in this study was descriptive, through observation on any parameters of the immunity including: Total hemocyte count (THC) and Percentage of Fagocytosis. Water quality in the location was also measured, including Dissolved Oxygen (DO), pH, water temperature, and water salinity. THC of Abalone in Mengening waters was 2.03 x 106 celss/ml, while the percentage of phagocytosis was 75,9%. Water quality during the study showed optimal condition (DO: 5.9-6.1 ppm; pH: 7.8; water temperature: 25.1-31.5oC; and water salinity: 33-34 ppt), even there was fluctuation on the water temperature (>5 oC) between morning and afternoon.

Kapasitas Penyerapan Limbah Fosfat oleh Dua Tanaman Air yang Melimpah di Bali (Eichornia crassipes dan Salvinia molesta) Kintanijaya Kintanijaya; Ima Yudha Perwira; Ni Putu Putri Wijayanti
Bumi Lestari Journal of Environment Vol 21 No 2 (2021)
Publisher : Environmental Research Center (PPLH) of Udayana University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/blje.2021.v21.i01.p05

Phosphate is known to be one of many pollutants in the aquatic environment causing environmental degradation. This study aimed to know the absorption rate of phosphate by two most abundant water plant in Bali (Eichornia crassipes and Salvinia molesta). This study used three treatments: treatment A (using Eichornia crassipes), treatment B (using Salvinia molesta), and treatment C (combination of both plants). Each treatment was performed in triplicate. The phytoremediation process was carried out in 14 days, and the measurement of phosphate in the water was carried out in every 7 days (day 1, day 7, and day 14). The other parameters measured in this study were: temperature, pH and Total Dissolved Solid (TDS). The concentration of phosphate was measured using Hanna HI-713 KIT, while temperature, pH and TDS were measured using: thermometer, pH meter, and TDS meter, respectively. Result showed that the most efficient treatment to absorb the phosphate in the water was shown by treatment using Eichornia crassipes (up to 37.4%).

Kandungan Nitrat, Fosfat, dan Silikat di Perairan Pantai Pandawa, Bali Mila Jeniarti; Ima Yudha Perwira; I Ketut Wija Negara
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 measure the concentration of nitrate, phosphate, and silicate in the water of Pandawa Beach waters. This study was conducted at the Kutuh Village (Badung, Bali, Indonesia), from December 2019 to January 2020. The water sample was collected from the location every week for one month. The water sample was taken from the surface, middle, and bottom of the water. Measurement of nitrate and silicate was performed using Salifert KIT Nitrate and Silicate, while measurement of phosphate was performed using Hanna 713 KIT analysis. The result showed that concentration of nitrate in the Pandawa Beach Waters was ranging from 0,91 to 2,00 mg/L. Concentration of phosphate was ranging from 0,32 to 1,93 mg/L, while silicate was ranging from 0,07 to 0,52 mg/L.

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

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