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Kelimpahan Bakteri Selulolitik di Muara Sungai Gunung Anyar Surabaya dan Bancaran Bangkalan [The Total of Cellulolytic Bacteria in Gunung Anyar Surabaya and Bancaran Bangkalan Estuaries ] Moch. Amin Alamsjah; Didya Sinatryani; Sudarno Sudarno; Kustiawan Tri Pursetyo
Jurnal Ilmiah Perikanan dan Kelautan Vol. 6 No. 2 (2014): JURNAL ILMIAH PERIKANAN DAN KELAUTAN
Publisher : Faculty of Fisheries and Marine Universitas Airlangga

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20473/jipk.v6i2.11299

Abstract Most organic materials utilized mangrove detritus such as mangrove leaves fall throughout the year. Organic particles or litter into a place to live for bacteria, fungi and other microorganisms. One of organic compounds in the soil is cellulose. Deciduous leaves on the ground allows that the cellulose content in the soil is high, it is possible to find cellulose degrading bacteria in the mangrove ecosystem. Soil sampling conducted in April 2014 located in Gunung Anyar Surabaya estuaries and Bancaran Bangkalan estuaries. After taking the samples, the isolation of cellulolytic bacteria and bacteria calculation were conduct using standard Total Plate Count (TPC). Based on the results of the calculation of total number bacteria, obtained the highest total number of cellulolytic bacteria at station E (Bancaran) of 4.9 x 104 CFU/ml. The highest percentage of cellulolytic bacteria obtained at station D (Bancaran) with a percentage of 27.09%. According to the whole calculation of the total number of bacteria, total number and percentage of cellulolytic bacteria, it was found that the area of Bancaran Bangkalan has higher abundance of cellulolytic bacteria than Gunung Anyar Surabaya mangrove areas.

Analisis Potensi Sonneratia sp. di Wilayah Pesisir Pantai Timur Surabaya Melalui Pendekatan Ekologi dan Sosial-Ekonomi [Potency Analysis Of Sonneratia sp. At East Coast Surabaya Through Ecology and Social Economy Studies] Kustiawan Tri Pursetyo; Wahju Tjahjaningsih; Sapto Andriyono
Jurnal Ilmiah Perikanan dan Kelautan Vol. 5 No. 2 (2013): JURNAL ILMIAH PERIKANAN DAN KELAUTAN
Publisher : Faculty of Fisheries and Marine Universitas Airlangga

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20473/jipk.v5i2.11395

Abstract The damages in mangrove forest recently rise due to the exploitation, either in farming or housing. It can cause the loss of mangrove function as marine ecosystem, affect marine biota survival, environment damage and reduce fishermen income in the future. For solving these problems, some efforts can be done by maximize the mangrove forest potential. Mangrove economic value analysis was done through two approaches. The first was Direct Use Value which use for knowing the benefit of the mangrove directly. The second was statistic analysis by multiple linear regression. The result of the research shows as many as 20 % of respondent make use of Sonneratia directly, either fruits, leaves or woods. Others, as many as 80% of respondents felt the benefit of Sonneratia indirectly. The research was done at mangrove forest of the Surabaya East Coast, East Java, Indonesia.

Pengaruh Pemupukan Ulang Kotoran Ayam Kering Terhadap Populasi Cacing Tubifex tubifex [The Effect Of Remanuring Dry Chicken Manure In Tubifex tubifex Population] Kustiawan Tri Pursetyo; Woro Hastuti Satyantini; A. Shofy Mubarak
Jurnal Ilmiah Perikanan dan Kelautan Vol. 3 No. 2 (2011): JURNAL ILMIAH PERIKANAN DAN KELAUTAN
Publisher : Faculty of Fisheries and Marine Universitas Airlangga

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20473/jipk.v3i2.11604

Abstract Tubifex tubifex is one kind of natural food for fish larva. This worm has an important role because it can support the fish growth faster than another natural food like Daphnia sp. or Moina sp. It is caused by its has high nutrition. Dry chicken manure can be used for manuring worm media because it have high organic matter. The purpose of this research was to know the effect of remanuring dry chicken manure to the population of Tubifex tubifex and to know the remanuring of dry chicken manure which is gives high population of Tubifex tubifex. The method used was experimental method. Completely Randomize Design was used in this research with 4 dose manuring treatments and 4 replication : PI (dose 0,08 g/cm2/l days), P2 (dose 0,4 g/cm2/5 days), P3 (dose 0,8 g/cm2/10 days) dan P4 (dose 1,2 g/cm2/15 days). The analysis result showed that the treatment of PI (dose 0,08 g/cm2/l day), manuring of dry chicken manure could give the highest population of Tubifex tubifex was 505 individuals reached at days20. At days-30 there was decreasing total number population so that the harvesting of Tubifex tubifex could be done at days-20. The water quality during this research were pH 6,4 - 7; DO 1,2 - 3,8 mg/1; water temperature 28 - 30 °C and ammonia 0,06 mg/1. The water quality was in optimum condition for Tubifex tubifex growth.

Community structure of bivalve in the Curah Ombo River Estuary, Java, Indonesia Pursetyo, Kustiawan Tri; Masithah, Endang Dewi; Idris, Mohd Hanafi; Sari, Luthfiana Aprilianita
Depik Jurnal Ilmu Ilmu Perairan, Pesisir, dan Perikanan Vol 14, No 3 (2025): SEPTEMBER 2025
Publisher : Faculty of Marine and Fisheries, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/depik.14.3.46308

Curah Ombo River is an estuarine water body with a muddy substrate that serves as the optimal habitat for bivalves. However, this water body experiences fluctuations in water conditions originating from both terrestrial sources and climate change. The impacts of these conditions trigger changes in the biological conditions, including bivalves.The objective of this study was to determine the diversity index, uniformity index, dominance index, and species richness index of bivalve molluscs found in the Curah Ombo River from Marchto June. The research parameters included identification, diversity index values (H'), uniformity (E), dominance (C), and species richness (R). Water quality was also measured as a supporting factor, including depth, temperature, dissolved oxygen (DO), pH, salinity, and brightness. All data were analyzed for their relationships using Principal Component Analysis (PCA). The results obtained at three points revealed nine species: Paratapes sp., Anadara antiquata, Anadara transversa, Anadara granosa, Meretrix meretrix, Scapharca pilula, Mytilus placuna, and Atrina pectinata. Point 2 showed the highest values for most diversity index values (H'), uniformity (E), dominance (C), and species richness (R), exceeding points 1 and 3. The results of Principal Component Analysis (PCA) show that total bivalve mollusks are categorized into one category together with salinity, light intensity, location, dissolved oxygen (DO), depth, and temperature.Keywords:MarineAquacultureInvertebratesLife feedEnvironmentEconomy

Framework for Sustainable Management of Shellfish Resources Based on Eco-Biology and Socio-Economic Conditions in Sedati, Sidoarjo, Indonesia Pursetyo, Kustiawan Tri; Idris, Mohd Hanafi; Zein, Alfian; Masithah, Endang Dewi
Jurnal Ilmiah Perikanan dan Kelautan Vol. 17 No. 1 (2025): JURNAL ILMIAH PERIKANAN DAN KELAUTAN
Publisher : Faculty of Fisheries and Marine Universitas Airlangga

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20473/jipk.vi.62841

Graphical Abstract Highlight Research Sustainable Management: Developing strategies for the long-term sustainability of shellfish resources in Sedati, Sidoarjo. Eco-Biological Considerations: Emphasizing the role of ecological and biological factors in managing shellfish populations. Socio-Economic Integration: Balancing economic activities and community welfare with the preservation of shellfish resources. Regional Focus: Tailoring management practices specifically to the unique environmental and social conditions of Sedati, Sidoarjo. Abstract Sedati is one of the subdistricts producing fishery products, namely milkfish, shrimp, and shellfish. Some of the products are further processed generate long-term income. Economic variables profoundly influence shellfish harvesting, as heightened catches immediately enhance fishermen's revenue. Nonetheless, increased income may lead to intensified fishing activities, potentially jeopardizing the viability of shellfish populations if not adequately regulated. This study develop to the framework for sustainable management of shellfish resources based on eco-biology and socio-economic conditions. This research used a survey research method with primary and secondary data. The samples collected from this study were spread across 224 respondents who are fishermen. The hauling process is carried out while catching shellfish 100-150 times. Shellfish fishing activities are carried out 20–26 days a month. This study found that catch factors having no significant effect on sustainable fisheries management, ecological factors and shellfish capture and sustainable fisheries and sustainable fisheries management social factors and the capture of shellfish. Biological factors and shellfish catchment and management economic factors influence the shellfish capture showed significant influence on the fisheries management. The development of this model can serve as a benchmark for shellfish fishing activity in this coastal water. Overfishing or activities in this area can be monitored using this model. The purpose is to control or monitor the stock and the inventory of the shellfish fisheries to preserve them for further use. Economic factors have a significant effect on shellfish caching because the more shellfish caught, the income of shellfish fishermen will directly increase, economic factors also have a significant influence on the sustainable management of shellfish. The greater the income of fishermen, the greater the availability of shellfish stocks will be because the fishing effort carried out by fishermen will be massive. This research in the future can provide information on how to balance ecological, economic, and social factors to ensure the long-term viability of shellfish populations and the ecosystem support.

Community structure of bivalve in the Curah Ombo River Estuary, Java, Indonesia Kustiawan Tri Pursetyo; Endang Dewi Masithah; Mohd Hanafi Idris; Luthfiana Aprilianita Sari
Depik Vol 14, No 3 (2025): SEPTEMBER 2025
Publisher : Faculty of Marine and Fisheries, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/depik.14.3.46308

Curah Ombo River is an estuarine water body with a muddy substrate that serves as the optimal habitat for bivalves. However, this water body experiences fluctuations in water conditions originating from both terrestrial sources and climate change. The impacts of these conditions trigger changes in the biological conditions, including bivalves.The objective of this study was to determine the diversity index, uniformity index, dominance index, and species richness index of bivalve molluscs found in the Curah Ombo River from Marchto June. The research parameters included identification, diversity index values (H'), uniformity (E), dominance (C), and species richness (R). Water quality was also measured as a supporting factor, including depth, temperature, dissolved oxygen (DO), pH, salinity, and brightness. All data were analyzed for their relationships using Principal Component Analysis (PCA). The results obtained at three points revealed nine species: Paratapes sp., Anadara antiquata, Anadara transversa, Anadara granosa, Meretrix meretrix, Scapharca pilula, Mytilus placuna, and Atrina pectinata. Point 2 showed the highest values for most diversity index values (H'), uniformity (E), dominance (C), and species richness (R), exceeding points 1 and 3. The results of Principal Component Analysis (PCA) show that total bivalve mollusks are categorized into one category together with salinity, light intensity, location, dissolved oxygen (DO), depth, and temperature.Keywords:MarineAquacultureInvertebratesLife feedEnvironmentEconomy

PENDAMPINGAN MANAJEMEN PAKAN PADA BUDIDAYA NILA SISTEM BIOFLOK DI BATAM UNTUK PENINGKATAN PRODUKSI Sulmartiwi, Laksmi; Satyantini, Woro Hastuti; Pursetyo, Kustiawan Tri; Saputra, M. Rafly Nur Wahyu Dwi; Mardiana, Intan Fajriya; Martianasari, Puji Dwi; Kurniawati, Cicik
Jurnal Abdi Insani Vol 13 No 1 (2026): Jurnal Abdi Insani
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/abdiinsani.v13i1.3264

This community service program was carried out to enhance the knowledge and skills of fish farmer groups (POKDAKAN) in Batam City in implementing the biofloc system efficiently through feed management and probiotic application. Batam City has substantial potential for Nile tilapia aquaculture; however, challenges such as high feed costs and declining water quality remain major constraints. The biofloc system offers a solution by utilizing microorganisms to convert organic waste into supplemental feed, thereby reducing production costs and maintaining water quality. The objective of this community service program is to improve the partners’ understanding and competencies in feed management and probiotic application. It is expected that the adoption of this technology will address the partners’ challenges, increase productivity, and ultimately enhance their income. The methods employed in this program included counseling, demonstrations, and hands-on practice related to probiotic application and the measurement of water quality parameters in culture ponds. Evaluation results showed that 80% of participants understood the biofloc technology, 65% were able to form and maintain flocs, and 80% recognized its benefits for aquaculture. Participants also reported increased knowledge regarding floc management, probiotics, and water quality parameters that were previously not well understood. The training strengthened participants’ understanding of the importance of controlling temperature, pH, dissolved oxygen (DO), and ammonia in supporting Nile tilapia growth within a biofloc system. Field practice activities received very positive responses and encouraged more effective implementation of biofloc technology among fish farmers in Batam. Therefore, continued assistance and systematic monitoring are necessary to ensure optimal application of biofloc technology and to provide long-term benefits for the aquaculture community.

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