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All Journal Jurnal Ilmu dan Teknologi Kelautan Tropis METAMORFOSA Journal of Biological Sciences Journal of Marine and Aquatic Sciences Jurnal Biologi Udayana Bumi Lestari ILMU KELAUTAN: Indonesian Journal of Marine Sciences REKAYASA Jurnal Kelautan Tropis Jurnal Sumberdaya Akuatik Indopasifik Journal of Marine Research and Technology Musamus Fisheries and Marine Journal Advances in Tropical Biodiversity and Environmental Sciences Ulil Albab

Putra, I Nyoman Giri

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Author-ID : 998739

Religion Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Computer Science & IT Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Immunology & microbiology Library & Information Science Physics Social Sciences Veterinary

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Estimasi Stok Karbon Di Atas Permukaan Menggunakan Citra Sentinel-1A di Hutan Mangrove Karang Sewu, Bali Nikmah Fitria Nuraini; I Wayan Gede Astawa Karang; I Nyoman Giri Putra
Journal of Marine Research and Technology Vol 5 No 1 (2022): FEBRUARI 2022
Publisher : Department of Marine Sciences, Faculty of Marine Science and Fisheries, Udayana University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/JMRT.2022.v05.i01.p05

Karang Sewu mangrove is one of the forests in the tropics that can store a higher amount of carbon compared to other forest. The researh of carbon storage in the Karang Sewu mangrove forest is required to support government policies in mitigating blue carbon. Research about above ground and below ground carbons in the Karang Sewu mangroves has not provided spatial information, and one of the techniques that can be used is remote sensing with Synthetic Aperture Radar (SAR). This research used SAR Sentinel-1A C-Band sensor imagery to estimate above-ground carbon in mangroves because it can penetrate the canopy to branch vegetation so that the backscatter value is not disturbed by water on the surface. The purpose of this study was to determine the above-ground carbon value in the mangrove forest Karang Sewu, Bali, using Sentinel-1A imagery. Estimation of above-ground carbon in SAR images using the sigma nought Vertikal Horizontal polarization method based on carbon estimation models from field data and image data. The best carbon estimator model is a polynomial model with the equation y = 0.1055x2 + 4.1507x + 43,691, R2 = 0.3347. The Root Mean Square Error (RMSE) error rate is 0,7. Based on the RMSE value, it can be concluded that the difference between the field carbon and the image carbon results is relatively small The estimation result of the total above-ground carbon value using Sentinel-1A imagery is 59.85 tons/ha.

Genetic Diversity and Phylogenetic of Longtail Tuna (Thunnus tonggol) Landed in Pabean Fish Market, Surabaya Ida Ayu Astarini; Shella Ayu Ardiana; I Nyoman Giri Putra; Putu Dian Pertiwi; Andrianus Sembiring; Astria Yusmalinda; Danie Al Malik
Musamus Fisheries and Marine Journal Volume 3 Number 2, April 2021
Publisher : Faculty of Agriculture Musamus University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35724/mfmj.v3i2.3375

Indonesia is the biggest tuna exporter in Southeast Asia. With a high number of tuna catch, it is worried that the catch will decrease tuna population, specifically longtail tuna. To anticipate the decrease, there needs to be a conservation program to protect longtail tunas from scarcity. One method used to protect longtail tuna is by genetic conservation. The aim of this research is to understand the genetic and phylogenetic variety of the longtail tuna in Pabean Surabaya Fish Market. The polymerase chain reaction was used to amplify segment of the mitochondrial control region gene from members of these sample, used forward primer CRK 5’-AGCTC AGCGC CAGAG CGCCG GTCTT GTAAA-3’ and reverse primer CRE 5’-CCTGA AGTAG GAACC AGATG-3’. Based on the sequencing process, 28 out of 29 samples longtail tuna were analyzed successfully. The results of the 28 sample analysis of longtail tuna based on its genetic variety and phylogenetic tree reconstruction showed a haplotype variety (Hd) score of 1,00000, and nucleotide (π) variety of 0,1939. Genetic variety value showed that longtail tuna has great adaption capabilities toward environmental changes time to time. Phylogenetic tree reconstruction results showed 7 clades with a genetic range of 0,005 – 0,035, which shows that all samples are closely related. The results of this study can be used as basic information in forming regulations on longtail tuna sustainable management and genetic conservation.

Status Konservasi dan Keanekaragaman Jenis Ikan yang Diperdagangkan di Pasar Ikan Tradisional di Bali I Nyoman Giri Putra; Elok Faiqoh; I Gusti Ngurah Made Wiratama
Jurnal Kelautan Tropis Vol 25, No 2 (2022): JURNAL KELAUTAN TROPIS
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jkt.v25i2.13610

The high demand for fish for local consumption and export has led to overfishing and increased the trade of fish that are prohibited by law and international agreements. Therefore, this study aims to calculate species diversity and determine the conservation status of fish traded in traditional fish markets in Bali. Field sampling was carried out at fish markets located in Badung, Buleleng, Karangasem, and Jembrana. Samples are identified to the lowest taxa level that can be determined, based on morphological characters. Diversity parameters such as the Shannon diversity index (H), Simpson (Simp), Fisher Alpha, Species richness (S) and Pielou's evenness (J) were calculated using the Rstudio while the determination of conservation status refers to the IUCN Red List. The number of fish samples collected was 69 individuals from 23 families. Of the total 69 individuals, 61 individuals were successfully identified to species level, while the rest of it were identified to the genus level. The results showed that the family of Labridae/wrasses has the highest number of species (9 species) followed by Clupeidae and Scombridae (7 species each). The result of diversity indices showed that the Kedonganan fish market (Badung) has the highest diversity. Evaluation of the conservation status of traded fish showed that 80% of the traded fish species are still in LC (Least Concern) status, although one species identified as bigeye tuna, Thunnus obesus, is known to have VU (Vulnerable) status. Tingginya permintaan ikan untuk konsumsi lokal maupun ekspor menyebabkan terjadinya overfishing dan meningkatkan perdagangan ikan-ikan yang dilarang oleh undang-undang maupun kesepakatan internasional. Oleh sebab itu, penelitian ini bertujuan untuk menghitung keanekaragaman jenis dan menentukan status konservasi ikan yang diperdagangkan di pasar ikan tradisional di Bali. Pengambilan sampel dilakukan di pasar ikan yang terletak di kabupaten Badung, Buleleng, Karangasem, dan Jembrana. Sampel diidentifikasi sampai pada level taksa terendah yang bisa ditentukan, berdasarkan pada karakter morfologi. Parameter keanekaragaman seperti indeks keanekaragaman Shannon (H), Simpson (Simp), Fisher Alpha, Species richness (S) dan Pielou’s evenness (J) dihitung dengan Rstudio sedangkan penentuan status konservasi mengacu pada IUCN RedList. Jumlah sampel ikan yang dikumpulkan sebanyak 69 individu dari 23 famili. Dari total 69 individu, 61 individu berhasil diidentifikasi sampai pada level spesies sedangkan sisanya sampai level genus. Hasil penelitian menunjukkan bahwa Famili Labridae/wrasses memiliki jumlah spesies terbanyak (9 spesies) disusul oleh Clupeidae dan Scombridae (masing-masing 7 spesies). Hasil analisis keanekaragaman menunjukkan bahwa pasar ikan Kedonganan (Badung) memiliki keanekaragaman tertinggi. Evaluasi terhadap status konservasi ikan yang diperdagangkan menunjukkan bahwa 80% jenis ikan yang diperdagangkan masih dalam status LC (Least Concern) meskipun ditemukan juga satu spesies yaitu tuna mata besar, Thunnus obesus yang diketahui dalam status VU (Vulnerable).

Seagrass (Enhalus acoroides) as an Heavy Metal Bioindicator on Biomonitoring Water Quality in Sanur Beach Bali Ni Putu Putri Wijayanti; I Nyoman Giri Putra
Advances in Tropical Biodiversity and Environmental Sciences Vol 3 No 1 (2019): ATBES
Publisher : Institute for Research and Community Services Udayana University

Abstract. Heavy metal contamination is a major threat for marine ecosystem that directly affecting the organisms’ life. Some of marine organisms have an ability to response the heavy metal contamination in water, and could be used as bio-indicator. One of them is seagrass that used in this study to evaluate the water quality in Sanur beach. This study was held in Sanur beach, Denpasar, from July-August 2018. Sampling location determined by purposive sampling method and generated 4 research stations. Sediments and seagrass leaves (Enhalus acoroides) was collected and analyzed in Analytical Laboratory Udayana University using ICPE-9000. Water quality parameters measured in situ (temperature and salinity) and in Medical Laboratory Bali Province (pH and DO). The results showed if the water quality in all research stations were in safety range based on Governor Regulation No. 16 of 2016 about marine water quality for tourism and recreation. The highest content of heavy metal (Pb) in sediment is 16.207 mg kg-1 that possessed by the 1st station, while the lowest is 14.318 mg kg-1 at the 3rd station. The highest Pb content in seagrass leaves at the 2nd station is 5.646 mg kg-1, and the lowest at the 1st station is 4.926 mg kg-1. The 3rd station sediment had the highest Cd content is 2.252 mg kg-1 and the 4th station had the lowest is 2.044 mg kg-1, while for leaves with the highest Cd content was at the 4th station is 0.552 mg kg-1 and the lowest at the 3rd station is 0.458 mg kg-1. The Cu content in sediment was highest at the 1st station is 11.533 mg kg-1 and the lowest at the 3rd station is 8.501 mg kg-1. For leaves’ Cu content, the highest amount of Cu is 3.699 mg kg-1 at the 4th station, while the lowest at the 2nd station with 2.570 mg kg-1.

Struktur Komunitas Moluska pada Musim Barat dan Musim Peralihan I di Perairan Tanjung Benoa Badung, Bali Dewa Ayu Wedha Astiti; Elok Faiqoh; I Nyoman Giri Putra
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.p15

Tanjung Benoa is a waters in Bali that is influenced by the monsoon pattern system which has a different circulation pattern of water masses and varies between seasons. The difference in mass of water resulted in changes in the condition of the waters that affect the high and low productivity of the waters and abundance of mollusks in the waters of Tanjung Benoa. Mollusks have an important role for the aquatic environment, namely as a bio-indicator of environmental health and water quality. This study aims to determine the structure of the molluscs community and determine the environmental factors that influence the western season and the transition season I. Sampling is done in January 2019 (west season) and in March 2019 (Transition I). The results of the analysis showed a decrease in diversity and uniformity occurred in the fourth week (west season) and the seventh week (transition season I) with the category of moderate species diversity and medium type uniformity. The low value of uniformity and diversity in the western season is influenced by increasing pH values and decreasing waters nitrate values. When compared with the western season, in the transition season I the increase in temperature and a decrease in phosphate value occur in the seventh week. this result was obtained using principal component analysis (PCA) that used the environmental parameter index and the value of diversity and uniformity of mollusks. However, this value is still in the medium category. So it can be seen in the western season and the transition season. The state of mollusks in Tanjung Benoa waters is stable and can adapt to seasonal changes and environmental conditions.

Keragaman Genetik Ikan Tongkol Abu-Abu (Thunnus tonggol) yang Didaratkan di Pasar Ikan Sagulung, Batam, Kepulauan Riau Berdasarkan DNA Mitokondria Suryany Devy; Ida Ayu Astarini; I Nyoman Giri Putra; Andrianus Sembiring; Luh Astria Yusmalinda; M. Danie Al Malik; Ni Putu Dian Pertiwi
Journal of Marine and Aquatic Sciences Vol 7 No 2 (2021)
Publisher : Fakultas Kelautan dan Perikanan Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/jmas.2021.v07.i02.p06

Longtail Tuna (Thunnus tonggol) is one of the neritic species of tuna from the Scrombridae family. T. tonggol is oceanicromus and ussually found in tropical and subtropical waters in the Indo-Pacific region. Although known as one of the tuna species, the information of this species is very lacking, especially in Indonesia. Therefore, this study aims to determine the genetic diversity and kinship relationships of longtail tuna (T. tonggol) collected at Sagulung fish market, Batam, Riau Islands. Molecular analysis were carried out using genetic markers namely mitochondrial D-loop (control regian) with the stages of DNA extraction, PCR (Polymerase Chain Reaction), electrophoresis, sequencing, and data analysis. A total of 21 longtail tuna samples were identified using molecularly and confirmed as T. tonggol species, which have a base length ranging from 482 - 523 bp (base pairs). The value of haplotype diversity (Hd) of longtail tuna was 1,00000 and the value of nucleotide diversity (?) was 0,01654. The results of phylogenetic tree reconstruction showed that all samples collected were in the same group (clade) with the average genetic distance in one T. tonggol clade obtained a value of 0.010 which has a close relationship between samples. This result can be use as additional information for longtail tuna species in Indonesia.

Pemetaan Perubahan Luasan Mangrove Menggunakan Citra Sentinel-2A Pasca Kematian Massal Mangrove di Denpasar-Bali Rowand Danny Sebastian Adinegoro; I Dewa Nyoman Nurweda Putra; I Nyoman Giri Putra
Journal of Marine and Aquatic Sciences Vol 8 No 1 (2022)
Publisher : Fakultas Kelautan dan Perikanan Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/jmas.2022.v08.i01.p08

Province of Bali is one of the mangrove forests distributed in Indonesia, which is spread over three sites, including Tahura Ngruah Rai. The mangrove area in the Tahura, especially in Denpasar city, mangrove forest suffered due to human activities and natural factors. Therefore, there is a need to monitor the distribution of mangrove forests in the area. Remote sensing is one of the technologies that can be used to control the extent and distribution of mangrove in that area. The aimed of this study was to determined the best band combination on the Sentinel-2A in detecting the mangrove-specific land cover, which was then used to map the extent of mangrove areas after death. The Band combinations tested are the combinations of band 4-3-2, 11-8-4 dan 8-11-2 on the Sentinel-2A. The results indicated that the value of producer accuracy (PA) as well as user accuracy (UA) in the mangrove class with combined band of 4-3-2 (PA= 92.59%, UA= 98.04%), 11-8-4 (PA= 85.19%, UA=88.46%), and 8-11-2 (PA= 71.15%, UA= 84.09%). This study concluded that the band combination of 4-3-2 is able to detect the mangrove better than the band combination of 11-8-4 and 8-11-2 with the total accuracy and an accuracy of the kappa respectively around 91.24% and 91.15%. Mangrove forests of the Tahura Ngura Rai, Denpasar city, had decreased the extent of mangrove forests by 25.58 hectares over a period of four years in 2016 (before incident) until 2020 (after incident).

Korelasi indeks keanekaragaman dan kerapatan tegakan dengan simpanan karbon mangrove Estuari Perancak Casamira Gitta Prasetyo; I Dewa Nyoman Nurweda Putra; I Nyoman Giri Putra
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.p08

Land use change is a huge threat for mangrove ecosystems,which are known for their high carbon sequestration and storage capacity.Vegetation restoration efforts are often undertaken, but fail to restore optimal ecosystem carbon sequestration. The mangrove forest of Perancak Estuary with a history of restoration project was made the subject of this research. The objectives include: (i) estimation of mangrove biomass and sediment carbon stock; (ii) comparison of restored, mixed and natural mangroves’ total carbon stock; (iii) correlational analysis between stand density and diversity indices with ecosystem carbon stock. Nine sampling points were determined within three mangrove categories (mixed, natural, restored). Stand characteristics and diameter at breast height (DBH) were measured to allometrically estimate biomass carbon. Sediment carbon was analyzed with Loss on Ignition (LOI) method. Correlational analysis was done with Pearson’s correlation coefficient. Total ecosystem carbon stock is 4472,93 tonnes ha-1 (biomass C: 4046,31 tonnes ha-1; sediment C: 426,62 tonnes ha-1). Highest carbon stock value was found on restored mangroves due to high contribution of sediment C offsetting its low biomass C. Lowest carbon stock value was found on natural mangroves due to decreased root biomass production and increased decomposition due to change in tidal regimes. There is a strong positive correlation between stand density and biomass carbon. Simpson index of diversity has a stronger (though non significant) correlation with biomass carbon than Shannon-Wiener index.

Estimasi Simpanan Karbon di Padang Lamun di Perairan Sumberkima Buleleng, Bali Gilang Pratama; I Wayan Gede Astawa Karang; I Nyoman Giri Putra
Journal of Marine Research and Technology Vol 6 No 1 (2023): FEBRUARI 2023
Publisher : Department of Marine Sciences, Faculty of Marine and Fisheries, Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/JMRT.2023.v06.i01.p04

Seagrass is one of the vegetation that has the potential to absorb carbon in Sumberkima waters, Bali. This study aimed to determine the density of seagrass and the estimated value of carbon storage at the top of the substrate (leaves) and at the bottom of the substrate (roots and rhizomes) in Sumberkima waters, Bali. This research was conducted on two islands, namely Pulau Gisik and Pulau Pasir Putih, on September 11 to October 8, 2021, where each island was taken 5 stations with a quadrant transect size of 50cm x 50cm, where each line transect was taken seagrass every 0 m, 50 m, and 100 m. The types of seagrasses found on Pasir Putih Island were Thalassia hemprichii, Cyomodocea serrulata, and C. rotundata while on Gisik Island, the types of seagrasses found were Thalassia hemprichii, Enhalus acoroides, Cymodocea rotundata, C. serrulata, and Halophila ovalis. The density of seagrass on Pasir Putih Island was, on average, between 40 - 87 stands/m2 with the category of rare to somewhat dense, while on Gisik Island, the average is between 35 - 44 stands/m2, indicating a rare category. Estimated total carbon storage in the upper substrate (leaves) on Pasir Putih Island and Gisik Island. The value of carbon storage in Pasir Putih Island at the top of the substrate (leaves) was 0.04 tons/ha, while at the bottom of the substrate (rhizomes and roots) was 0.05 tons/ha, and the value of carbon storage in Gisik Island was at the top. the substrate (leaves) was 0.03 tons/ha, while at the bottom of the substrate (rhizomes and roots), it was 0.04 tons/ha

Kelimpahan dan Jenis Mikroplastik pada Sedimen Lamun di Perairan Nusa Dua, Bali Sartika Ristama Silitonga; I Gede Hendrawan; I Nyoman Giri Putra
Journal of Marine Research and Technology Vol 6 No 1 (2023): FEBRUARI 2023
Publisher : Department of Marine Sciences, Faculty of Marine and Fisheries, Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/JMRT.2023.v06.i01.p01

The Indonesian archipelago, especially Bali, has extensive coastline and marine waters. However, it is undeniable that some of these waters contain much plastic waste. Nusa Dua waters are located in the Bali Province area with many complex activities, ranging from port activities, water sports, tourism, restaurants, hotels, fishing activities, and others, so they have a high potential for plastic waste pollution. Plastic waste that floats in the ocean will degrade and become small debris called microplastics. Marine plastic debris is divided into several varieties based on size. It is called microplastic for those less than 5 millimeters in length; for those above 5 mm and up to 25 mm, it is mesoplastic. This study aimed to determine the abundance and types of microplastics found in Nusa Dua. This research was conducted in November-Desember 2021. Sampling was carried out in situ with the simple random sampling method of 400 grams of each sample at ten stations. Sediment sampling was carried out using a shovel. Then the ex-situ processing was carried out by drying wet sediment, weighing dry sediment, density separation, filtering, and visual sorting. The results showed that the seagrass sediments in Nusa Dua waters were contaminated with microplastic. Four types of microplastic were found: fragment, fiber/filament, film/soft plastic, and foam. As many as 17 particles fragment the type of microplastic that dominates. The dominant color is blue. The highest total abundance of microplastics was found at station 6, as much as 35.1 particles/kg with different densities of seagrass species at each station. The density of seagrass species itself reaches the range of 1.2 stands/m2

Co-Authors Alanis Ismi Akasia Andrianus Sembiring Andrianus Sembiring Andrianus Sembiring Andrianus Sembiring Anisa Dea Novianti Astria Yusmalinda Astria Yusmalinda Atmaja, Putu Satya Pratama Bertha Ayu Andhira Casamira Gitta Prasetyo Chloe Henderson Dandi Saleky Danie Al Malik Danie Al Malik Demianus Hukom, Frensly Dewa Ayu Wedha Astiti Dicky Septiady Dwi Budi Wiyanto Eka Andiani, Anak Agung Elok Faiqoh Elok Faiqoh Endang Wulandari Suryaningtyas Franceska Kendra Rossa S Gabrielle Aisya Gede Surya Indrawan Gede Surya Indrawan Gede Yuda Kamajaya Gilang Pratama I Dewa Nym. Nurweda P., I Dewa Nyoman Nurweda Putra I Gede Ening Sumantra I Gede Hendrawan I Gede Hendrawan I Gede Panji Agung Purnomo I Gusti Bagus Sila Dharma I Gusti Ngurah Putra Dirgayusa I Gusti Putu Bayu Arri Putra I Gusti Sila Dharma I Ketut Suta Negara I Putu Sugiana I Putu Yogi Darmendra I Wayan Arthana I Wayan Eka Dharmawan I Wayan Gede Astawa Karang IDA AYU ASTARINI Irman Rumengan Kadek Dwi Artama Kadek Widya Suryaningsih Ketut Popi Anjani Devi Luh Astria Yusmalinda M. Danie Al Malik Ni Luh Putu Emi Trisna Dewi Ni Luh Putu Ria Puspitha Ni Putu Dian Pertiwi Ni Putu Dian Pertiwi Ni Putu Putri Wijayanti Nikmah Fitria Nuraini Nur Ismu Hidayat Nurdyputra, I Gusti Ngurah Galih Ksatria Mahadhika Nyoman Dati Pertami Paul Helga Fernandez Potje, Emilian Ivarlyano Priscilla Princessa Amalo Putra Bagus Panji Pamungkas Putu Dian Pertiwi Putu Dian Pertiwi Putu Maya Witariningsih Rowand Danny Sebastian Adinegoro Sartika Ristama Silitonga Septi Novita Sari Shella Ayu Ardiana Simon P.O Leatemia Stephanus Tambunan Suryany Devy Wiratama, I Gusti Ngurah Made Yuanike Yuanike Yulianto Suteja

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