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All Journal Jurnal Pengolahan Hasil Perikanan Indonesia Jurnal Ilmu dan Teknologi Kelautan Tropis Ecotrophic, Journal of Environmental Science Jurnal Kelautan Tropis Jurnal Kebijakan Perikanan Indonesia International Journal of Marine Engineering Innovation and Research Depik Jurnal Ilmu-Ilmu Perairan, Pesisir dan Perikanan Policy Brief Pertanian, Kelautan, dan Biosains Tropika Depik Jurnal Ilmu-Ilmu Perairan, Pesisir, dan Perikanan Journal of Fisheries & Marine Advances in Tropical Biodiversity and Environmental Sciences
Meutia Samira Ismet
Department Of Marine Science And Technology, Faculty Of Fisheries And Marine Science, IPB University, Bogor, West Java. Indonesia
Agriculture, Biological Sciences & Forestry Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Immunology & microbiology Industrial & Manufacturing Engineering Library & Information Science Materials Science & Nanotechnology Mechanical Engineering Medicine & Pharmacology Physics Social Sciences Transportation Veterinary Other

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Analysis of Abundance and Composition of Culturable Bacteria and Their Relationship with Water Quality Parameters in Intensive Shrimp Ponds Setiabudi, Gede Iwan; Antara, Kadek Lila; Fain, Hamdanul; Ismet, Meutia Samira
Advances in Tropical Biodiversity and Environmental Sciences Vol. 10 No. 1 (2026): February 2026 (in progress)
Publisher : Institute for Research and Community Services Udayana University (LP2M Universitas Udayana)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/ATBES.2026.v10.i01.p01

Abstract

Intensive cultivation of Pacific white shrimp (Penaeus vannamei) is a crucial pillar of the aquaculture economy, but it faces sustainability challenges due to water-quality degradation driven by microbial activity. This study aims to analyze the total bacterial count (TBC) and total Vibrio count (TVC), identify the dominant culturable bacterial genera, and determine their statistical relationship with physicochemical water quality parameters in intensive shrimp ponds. The research methodology included regular sampling of water and sediment over one cultivation cycle. Water quality was analyzed using standard methods, while bacterial enumeration was performed using the spread plate technique on Marine Agar and Thiosulfate Citrate Bile Salts Sucrose Agar media. Pearson's correlation analysis was used to test the relationship between variables. The results show that some water quality parameters, particularly ammonia and TOM, tended to increase and exceed the SNI 01-7246-2006 quality standard as the cultivation cycle progressed. The abundance of TBC and TVC in sediment (average 106−107CFU/g) was significantly higher than in the water column (average 104−105 CFU/mL). Correlation analysis revealed a strong and significant negative relationship between DO and TBC (r=−0.85, p<0.01) and TVC (r=−0.79, p<0.01). Conversely, a strong and significant positive correlation was found between TOM and TBC (r=0.91, p<0.01) and TVC (r=0.88, p<0.01), as well as between ammonia and both TBC and TVC. It is concluded that the abundance of culturable bacteria, especially TBC and TVC, serves as a sensitive biological indicator of organic load and ecological stress in intensive pond systems. The strong predictive relationship between these microbial metrics and key parameters, such as DO and TOM, underscores the importance of microbiological monitoring for proactive management and improved sustainability in aquaculture.
Presenting identification keys and future study on seagrass Halophila major in Indonesia Darus, Robba Fahrisy; Bengen, Dietriech Geoffrey; Zamani, Neviaty Putri; Ismet, Meutia Samira
Depik Vol 14, No 2 (2025): JUNE 2025
Publisher : Faculty of Marine and Fisheries, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/depik.14.2.44166

Abstract

Halophila major is a new species with a wide distribution across various regions in Indonesia. The species was identified in 2020 through a combination of morphology and molecular approaches. Several studies have shown that it has a similar morphology to H. ovalis, which causes significant confusion during identification. Therefore, this study aims to describe the key identification and habitat of H. major and summarize seagrasses study opportunities based on the trend of published articles. A bibliometric analysis was used to summarize the habitat, morphometrics, molecular confirmation, and trend of seagrass topics in Indonesia. Based on the scientific articles, H. major has bigger morphometrics than H. ovalis. In addition, the number of paired and branching cross veins was reported to be an identification key of H. major. The species was also considered a deep ovalis found in 2-4 m depth. Genetically, the Internal Transcribed Spacer (ITS) gene marker was appropriate to showits phylogenetic tree. H. major was also classified into different clades with H. ovalis due to various factors. The results showed that genetics, tourism, and restoration were topics with the potential to be explored in the future. This study recommended collaborating in multi-institution to transfer knowledge, technologies, and project arrangements for seagrass exploration.Keywords:BibliometricHalophilaMarine angiospermaeMarin plantRediscoverySpecies
Biodegradation activities of microplastic polymers by Agelas conifera sponge-symbiotic bacteria Ismet, Meutia Samira; Srimariana, Endang Sunarwati; Cahyati, Nur Alam Dwi; Anggraini, Nurlita Putri; Simbolon, Lenni Mariana; Cakasana, Nadya; Rafi, Mohamad
Depik Vol 14, No 2 (2025): JUNE 2025
Publisher : Faculty of Marine and Fisheries, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Research on microplastic (MP) accumulation in marine organisms' tissue have been widely conducted, as well as research on microplastic biodegradation by microbial organisms from the environment.Agelas coniferasponge is proven to accumulate MP in its tissue as well as having bacteria as symbiotic organism. This research aims to screen and study biodegradation activities ofA. coniferasymbiotic bacteria on MP polymers, alsoto identify the species of those bacteria isolates. Bacterial Isolation ofA. coniferasponge tissue was using Zobell 2216E agar media. Screening and biodegradation assay of the bacteria isolates was conducted on Marine Salt Media agar that was added with 0,5 g of MP polymers, using Kroc-Boral method. Diameter of clear (bacterial growth) zone surrounding Kroc-Boral indicated the biodegradation activity of the bacterial isolates. Statistical analysis on the activity was using Two Way ANOVA. Results showed that there were 9 bacterial isolates of 53 that could degrade several MP polymers, with different activities (ANOVA, p value 0.05). High and low-density polymers (Linear- Low Density PolyEthylene/ LLDPE, Polyethylene/PE, and Polyvinyl Chloride/ PVC) were found to be degraded by all 9 isolates. Meanwhile, Polyethylen Taraphtalene (PET) and Polystyrene (PS) only degraded by 8 and 3 isolates, respectively. There are only 5 isolates that have high biodegradation index (1.5) on different polymers, which mostly on PET polymer. Isolate Ac8MP found to be the most bacteria that have degradation index on all polymers more than 1.This research proves that symbiotic bacteria could have a biodegradation mechanism on MP polymers that accumulates by sponge-host. However, further study needs to be done to understand the mechanisms and effectiveness of sponge-bacterial biodegradation activity.
Co-Authors Abrahamsz, Jodie G. Agung Putra Utama Ajie Imamsyah Anggraini, Nurlita Putri Arisandi, Defrian Marza Aziz, Nasrul Aznardi, Shodikin Aznardi Beginer Subhan Cahyati, Nur Alam Dwi Dedi Soedharma Dietriech Geoffrey Bengen Endang Sunarwati Srimariana Fadel Muhammad Fain, Hamdanul Fery Kurniawan Gede Iwan Setiabudi Hawis H Madduppa Hefni Effendi Husmayani, Wa Ode Ilham, Yuwanda Imanditya, Muhammad Fachriza Kadek Lila Antara M. Rafi Maestro Munru Miswandi, Muhammad Muhammad Irlan Assidiq Kusuma Ramadhan Muhammad Reza Cordova, Muhammad Reza Mujizat Kawaroe Munru, Maestro Nadya Cakasana Nasrul Aziz NEVIATY PUTRI ZAMANI Noferya, Efi Nurlita Anggraini Nyoman M N Natih Ocky Karna Radjasa Rahman, Lucky Rahmat, Fadhlan Basiluddin Retraubun, Alex S.W. Rita Andini RITA ANDINI Robba Fahrisy Darus, Robba Fahrisy Ryan Adhitia Muslim Sallatu, Muh Ashry Salsabila, Afviya Samsuardi Samsuardi, Samsuardi Sari, Anita Edya Melliana Sawalman, Rahmat Sembiring, Enny Rimita Setyaningsih, Wahyu Adi Shinta Werorilangi, Shinta Simatupang, Candida Putri Nauli Simbolon, Lenni Mariana Siti Maysaroh Siti Maysaroh Taqiyuddin, Muhammad Wijdan Yennafri, Yennafri yoman Metta N Natih Zakiyah Rahim