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Laju penempelan macrofouling pada tiang pancang jembatan Suramadu Wildan Al-Kautsar; Rizqi Abdi Perdanawati*,; Noverma Noverma
Jurnal Ilmu Kelautan Kepulauan Vol 3, No 2 (2020): Jurnal Ilmu Kelautan Kepulauan
Publisher : Fakultas Perikanan dan Kelautan. Universitas Khairun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33387/jikk.v3i2.2587

Peristiwa korosi atau degradasi komponen beton dan baja jembatan di lingkungan lautdapat disebabkan oleh penempelan biota laut (macrofouling).Penempelan macrofouling pada tiang pancang jembatan Suramadu akan menyebabkan kerusakan akibat kehadiran biota tersebut. Tujuan penelitianadalah untuk mengetahui laju penempelan macrofouling pada tiang pancang jembatan Suramadu.Metode yang digunakan dalam penentuan titik pengamatan adalah purposive sampling dengan pertimbangan cahaya matahari dan jarak titik pengamatan dengan garis pantai. Data individu macrofouling diperoleh menggunakan kuadran ukuran 20×20 cm. Hasil pengukuran parameter oseanografiasih mendukung terhadap penempelan macrofouling karena masih dalam batas toleransi untuk kehidupan dan penempelan macrofouling. Laju penempelan macrofouling menunjukkan peningkatan selama masa penelitian dengan lajupenempelan macrofouling pada stasiun I3175ind/m2/minggu titik A (sisi timur) dan 3875 ind/m2/minggu titik B (sisi barat), stasiun pengamatan II memiliki laju penempelan 8700ind/m2/minggu titik C (sisi timur) dan 16544ind/m2/minggu titik D (sisi barat).Kata kunci: Macrofouling, laju penempelan, tiang pancang, jembatan Suramadu

Analisis Korelasi Parameter Oseanografi Terhadap Hasil Tangkapan Jaring Purse Seine di Perairan Kranji, Kecamatan Paciran Kabupaten Lamongan Nova Elasari; Rizqi Abdi Perdanawati; Mauludiyah Mauludiyah
Jurnal Perikanan dan Kelautan Vol 27, No 3 (2022): October
Publisher : Fakultas Perikanan dan Kelautan Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jpk.27.3.371-381

Kranji waters have potential fishing grounds for the development of large marine fisheries. Kranji fishermen often face obstacles in their fishing efforts due to a lack of information about the season and potential fishing areas. The oceanographic factor of the waters can be one of the clues to determining a good catch. The purpose of this study was to determine the condition of the oceanographic parameters of the fishing area, determine the catch rate and determine the correlation of oceanographic parameters to the catch of ring trawlers. The data used in this study were temperature, salinity, depth, current velocity and catch for 10 fishing trips. Oceanographic parameters in the Kranji fishing area for 10 fishing trips were as follows: temperature ranged from 29.9- 31.8°C, water salinity ranged from 29-31.1‰, water depth ranges from 50-70 m and the current velocity ranges from 0.09to 0.34 m/s. The variability of ring trawl production during 10 times of capture found 5 species caught. The variability and composition of purse seine catches were as follows: Tongkol Walang with a percentage of 54.42%, Tongkol Lorek with a percentage of 38.13%, belo fish with a percentage of 6.37%, juwi with a percentage of 0.53%, and the lowest. the percentage is bagong by 0.52%. The correlation of oceanographic parameters with purse seine catches is as follows: Current velocity has the highest correlation value with a correlation coefficient of 0.814. The temperature has a strong category value with a correlation coefficient of 0.756. Salinity has a negative correlation value with a value of -0.658. Depth has a strong category value with a correlation coefficient value of 0.657.

Assessing vulnerability and community knowledge of climate change impacts on Bawean Island, Indonesia Mubarok, Mohammad Fahmi; Sawiji, Asri; Perdanawati , Rizqi Abdi
Journal of Marine Resources and Coastal Management Vol. 5 No. 1 (2024)
Publisher : UIN Sunan Ampel Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29080/mrcm.v5i1.2170

Bawean Island, located in Gresik Regency, is highly vulnerable to the impacts of climate change due to its coastal position. One of the significant impacts is sea level rise, which increases the risk of tidal floods. Effective and timely decision-making is essential to mitigate and manage these risks. This study focuses on mapping vulnerability and assessing the level of community knowledge regarding climate change to evaluate the island's susceptibility. The objectives include identifying data, measuring community knowledge levels, and analyzing vulnerability. The findings reveal that 323 hectares fall into the vulnerable category, while 1 hectare is classified as very vulnerable. The community's knowledge level is predominantly high, with 73% of respondents scoring high and 27% moderate. Inundation predictions for the next 20 years, based on a sea level rise of 3 cm per year, estimate an inundation area of 319,398 hectares in 2024 with a sea level rise of 2.64 cm. By 2044, the highest high-water level (HHWL) of 4.00 cm could inundate an area of 442,625 hectares. These findings underscore the urgent need for adaptation strategies to mitigate the risks of tidal floods and enhance the resilience of coastal communities on Bawean Island.

Correlation Analysis of Oceanographic Parameters to Catching of Purse Seine Nets in Kranji Waters, Paciran District, Lamongan Regency Elasari, Nova; Perdanawati, Rizqi Abdi; Maulidiyah, Maulidiyah
Jurnal Perikanan dan Kelautan Vol. 27 No. 3 (2022): October
Publisher : Faculty of Fisheries and Marine, Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/

Kranji waters have potential fishing grounds for the development of large marine fisheries. Kranji fishermen often face obstacles in their fishing efforts due to a lack of information about the season and potential fishing areas. The oceanographic factor of the waters can be one of the clues to determine a good catch. The purpose of this study was to determining the condition of the oceanographic parameters of the fishing area, determine the catch rate and determine the correlation of oceanographic parameters to the catch of ring trawlers. The data used in this study were temperature, salinity, depth, current velocity and catch for 10 fishing trips. Oceanographic parameters in the Kranji fishing area for 10 fishing trips were as follows: temperature ranged from 29.9- 31.8°C, water salinity ranged from 29-31.1‰, water depth ranges from 50-70 m and the current velocity ranges from 0.09 to 0.34 m/s. The variability of ring trawl production during 10 times of capture found 5 species caught. The variability and composition of purse seine catches were as follows: Tongkol Walang with a percentage of 54.42%, Tongkol Lorek with a percentage of 38.13%, belo with a percentage of 6.37%, juwi with a percentage of 0.53%, and the lowest. the percentage is bagong by 0.52%. The correlation of oceanographic parameters with purse seine catches is as follows: Current velocity has the highest correlation value with a correlation coefficient of 0.814. The temperature has a strong category value with a correlation coefficient of 0.756. Salinity has a negative correlation value with a value of -0.658. Depth has a strong category value with a correlation coefficient value of 0.657.

Correlation Analysis of Oceanographic Parameters to Catching of Purse Seine Nets in Kranji Waters, Paciran District, Lamongan Regency Elasari, Nova; Perdanawati, Rizqi Abdi; Maulidiyah, Maulidiyah
Jurnal Perikanan dan Kelautan Vol. 27 No. 3 (2022): October
Publisher : Faculty of Fisheries and Marine, Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/

Kranji waters have potential fishing grounds for the development of large marine fisheries. Kranji fishermen often face obstacles in their fishing efforts due to a lack of information about the season and potential fishing areas. The oceanographic factor of the waters can be one of the clues to determine a good catch. The purpose of this study was to determining the condition of the oceanographic parameters of the fishing area, determine the catch rate and determine the correlation of oceanographic parameters to the catch of ring trawlers. The data used in this study were temperature, salinity, depth, current velocity and catch for 10 fishing trips. Oceanographic parameters in the Kranji fishing area for 10 fishing trips were as follows: temperature ranged from 29.9- 31.8°C, water salinity ranged from 29-31.1‰, water depth ranges from 50-70 m and the current velocity ranges from 0.09 to 0.34 m/s. The variability of ring trawl production during 10 times of capture found 5 species caught. The variability and composition of purse seine catches were as follows: Tongkol Walang with a percentage of 54.42%, Tongkol Lorek with a percentage of 38.13%, belo with a percentage of 6.37%, juwi with a percentage of 0.53%, and the lowest. the percentage is bagong by 0.52%. The correlation of oceanographic parameters with purse seine catches is as follows: Current velocity has the highest correlation value with a correlation coefficient of 0.814. The temperature has a strong category value with a correlation coefficient of 0.756. Salinity has a negative correlation value with a value of -0.658. Depth has a strong category value with a correlation coefficient value of 0.657.

Correlation Analysis of Oceanographic Parameters to Catching of Purse Seine Nets in Kranji Waters, Paciran District, Lamongan Regency Elasari, Nova; Perdanawati, Rizqi Abdi; Mauludiyah, Mauludiyah
Jurnal Perikanan dan Kelautan Vol. 27 No. 3 (2022): October
Publisher : Fakultas Perikanan dan Kelautan Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/

Kranji waters have potential fishing grounds for the development of large marine fisheries. Kranji fishermen often face obstacles in their fishing efforts due to a lack of information about the season and potential fishing areas. The oceanographic factor of the waters can be one of the clues to determine a good catch. The purpose of this study was to determining the condition of the oceanographic parameters of the fishing area, determine the catch rate and determine the correlation of oceanographic parameters to the catch of ring trawlers. The data used in this study were temperature, salinity, depth, current velocity and catch for 10 fishing trips. Oceanographic parameters in the Kranji fishing area for 10 fishing trips were as follows: temperature ranged from 29.9- 31.8°C, water salinity ranged from 29-31.1‰, water depth ranges from 50-70 m and the current velocity ranges from 0.09 to 0.34 m/s. The variability of ring trawl production during 10 times of capture found 5 species caught. The variability and composition of purse seine catches were as follows: Tongkol Walang with a percentage of 54.42%, Tongkol Lorek with a percentage of 38.13%, belo with a percentage of 6.37%, juwi with a percentage of 0.53%, and the lowest. the percentage is bagong by 0.52%. The correlation of oceanographic parameters with purse seine catches is as follows: Current velocity has the highest correlation value with a correlation coefficient of 0.814. The temperature has a strong category value with a correlation coefficient of 0.756. Salinity has a negative correlation value with a value of -0.658. Depth has a strong category value with a correlation coefficient value of 0.657.

Correlation Analysis of Oceanographic Parameters to Catching of Purse Seine Nets in Kranji Waters, Paciran District, Lamongan Regency Elasari, Nova; Perdanawati, Rizqi Abdi; Mauludiyah, Mauludiyah
Jurnal Perikanan dan Kelautan Vol. 27 No. 3 (2022): October
Publisher : Fakultas Perikanan dan Kelautan Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/

Kranji waters have potential fishing grounds for the development of large marine fisheries. Kranji fishermen often face obstacles in their fishing efforts due to a lack of information about the season and potential fishing areas. The oceanographic factor of the waters can be one of the clues to determine a good catch. The purpose of this study was to determining the condition of the oceanographic parameters of the fishing area, determine the catch rate and determine the correlation of oceanographic parameters to the catch of ring trawlers. The data used in this study were temperature, salinity, depth, current velocity and catch for 10 fishing trips. Oceanographic parameters in the Kranji fishing area for 10 fishing trips were as follows: temperature ranged from 29.9- 31.8°C, water salinity ranged from 29-31.1‰, water depth ranges from 50-70 m and the current velocity ranges from 0.09 to 0.34 m/s. The variability of ring trawl production during 10 times of capture found 5 species caught. The variability and composition of purse seine catches were as follows: Tongkol Walang with a percentage of 54.42%, Tongkol Lorek with a percentage of 38.13%, belo with a percentage of 6.37%, juwi with a percentage of 0.53%, and the lowest. the percentage is bagong by 0.52%. The correlation of oceanographic parameters with purse seine catches is as follows: Current velocity has the highest correlation value with a correlation coefficient of 0.814. The temperature has a strong category value with a correlation coefficient of 0.756. Salinity has a negative correlation value with a value of -0.658. Depth has a strong category value with a correlation coefficient value of 0.657.

Environmental friendliness of traditional fishing gear in the northern coastal waters of East Java, Indonesia Rahmany, Cindy Ananda; Samudra, Muhammad Farhan Satya Bintang; Wijaya, Amelia Rachma; Ramadhan, Yusril Ilhami; Perdanawati, Rizqi Abdi
Journal of Marine Resources and Coastal Management Vol. 6 No. 1 (2025)
Publisher : UIN Sunan Ampel Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29080/mrcm.v6i1.2272

The northern waters of East Java are classified as semi-enclosed marine areas, characterized by relatively mild wave activity and shallow depths. Seasonal monsoon winds significantly influence ocean currents in this region, creating favorable conditions for the exploitation of coastal and marine resources. Communities living in these coastal areas exhibit a high socio-economic dependency on marine ecosystems. This study aims to assess the types of fishing gear used by communities along the northern coast of East Java, focusing on gear design, construction materials, catch composition, and environmental sustainability. The findings reveal that fishermen in Surabaya City and Sidoarjo Regency primarily utilize traditional fishing gear such as nets, traps, rods, and region-specific tools locally known as serok, sonder, cager, nyatak, pancalan, and garit. An environmental friendliness assessment based on FAO (1995) criteria yielded high scores: gillnets (28.21), waring nets (31.25), garit (31.74), and traps/bubu (33.26). These results place all gear types within the "very environmentally friendly" category (score range: 26–36), indicating the ecological sustainability of traditional fishing practices in the region. This study highlights the importance of supporting traditional fishing gear to promote sustainable fisheries and preserve marine ecosystems in East Java.

Potensi Antifouling Ekstrak Teripang (Phyllophorus sp.) Terhadap Bakteri Biofilm Di Beton Perairan Jembatan Suramadu Arnanda, Nisya; Maisaroh, Dian Sari; Perdanawati, Rizqi Abdi
Jurnal Kelautan Vol 18, No 2: Agustus (2025)
Publisher : Department of Marine Sciences, Trunojoyo University of Madura, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/jk.v18i2.27332

ABSTRAKPenempelan biota pada permukaan beton diawali dengan tahapan penempelan koloni bakteri dan mikroalga (biofilm). Fenomena ini terjadi pula pada beton di jembatan Suramadu. Biofilm yang nantinya berkembang menjadi makrofouling rentan menimbulkan kerusakan sehingga diperlukan upaya untuk menghambat penempelan biofilm. Penelitian ini bertujuan untuk menganalisa kemampuan antifouling ekstrak teripang (Phyllophorus sp.) terhadap biofilm yang muncul di perairan jembatan Suramadu. Pengambilan sampel biofilm didapatkan dari permukaan rendaman beton di perairan jembatan Suramadu. Tahapan penelitian dimulai dari identifikasi bakteri biofilm secara morfologi, pembuatan ekstrak teripang dan pengujian antifouling dengan uji fitokimia dan uji zona hambat. Uji zona hambat ekstrak teripang (Phyllophorus sp.) dilakukan dengan hasil rendemen sebesar 5,64% dengan 2 variasi ekstrak uji yaitu 100% ekstrak dan 50% ekstrak. Bakteri biofilm diketahui terdiri dari bakteri gram positif kokus, gram positif basil, gram negatif kokus dan tidak ditemukan gram negatif basil. Hasil uji fitokimia sebagai agen antifouling yang dapat menghambat pertumbuhan biofilm antara lain fitokimia alkaloid, flavonoid dan terpernoid. Tingkat hambat ekstrak dengan kategori kuat ditemukan pada variasi ekstrak 100% yaitu 2,34–10,92 mm pada 5 isolat, pada ekstrak 50% zona hambat pada kategori lemah. Hasil ini menunjukkan adanya potensi penggunaan ektrak teripang (Phyllophorus sp.) terhadap biofilm yang muncul di perairan jembatan Suramadu.Kata kunci: Antifouling, Biofilm, Biofouling, Ekstrak Teripang, Jembatan SuramaduABSTRACTBiofouling on the concrete surface begins with the adhesion of bacterial and microalgae colonies (biofilm). This phenomenon also occurs on the concrete of the Suramadu Bridge. Biofilms, which eventually develop into macrofouling, are prone to causing damage, necessitating efforts to inhibit biofilm attachment. This study aims to analyze the antifouling potential of sea cucumber extract (Phyllophorus sp.) against biofilms found in the waters of the Suramadu Bridge. Biofilm samples were obtained from the surface of concrete submerged in the waters around the Suramadu Bridge. The research stages included the morphological identification of biofilm bacteria, preparation of sea cucumber extract, and antifouling testing through phytochemical analysis and inhibition zone tests. The inhibition zone test of the sea cucumber extract (Phyllophorus sp.) yielded a 5.64% extract with two variations tested: 100% extract and 50% extract. The biofilm bacteria were identified as gram-positive coccus, gram-positive bacilli, gram-negative coccus, but none of gram-negative bacilli found. The phytochemical analysis indicated that alkaloids, flavonoids, and terpenoids in the extract served as antifouling agents capable of inhibiting biofilm growth. A strong inhibition was observed in the 100% extract variation by the diameter 2,34 – 10,92 mm for 5 isolats, while the 50% extract showed weak inhibition. These results demonstrate the potential use of sea cucumber extract (Phyllophorus sp.) in controlling biofilm formation in the waters surrounding the Suramadu Bridge..Keyword: Antifouling, Biofilm, Biofouling, Sea Cucumber Extract, Suramadu Bridge

Effect of local sea cucumber (Phyllophorus sp.) methanol extract as natural antifouling against macrofouler (Nerita sp.) Hasanah, Himatul; Maisaroh, Dian Sari; Perdanawati, Rizqi Abdi
Journal of Marine Resources and Coastal Management Vol. 2 No. 1 (2021)
Publisher : UIN Sunan Ampel Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29080/mrcm.v2i1.1128

This study aims to find out the activities of local sea cucumber methanol extract (Phyllophorus sp.) as a natural antifouling against macrofouler Nerita sp. This study uses experimental methods laboratory. Laboratory-scale data collection is carried out by observation of biota paste activities fouling on the aquarium (antifouling rate) as well as its regaining rate. This research uses research design complete random design (RAL) with three repetitions. Local sea cucumber methanol extract (Phyllophorus sp.) contains bioactive compounds such as saponins, alkaloids, tannins, steroids and phenolics. Methanol Extract local sea cucumber (Phyllophorus sp.) affects the antifouling rate by reducing the Nerita sp. macrofouler paste rate with increasing concentration. It's the same thing,occurs where the increasing concentration of local sea cucumber methanol extract (Phyllophorus sp.) provides a significant decrease in Nerita sp. macrofouler regaining capability. The results lethal concentration 50 or LC50 obtained a value of 185.18. This means the concentration of the extract sea cucumber (Phyllophorus sp.) is deadly 50% of all biota test at a concentration of 185.18 mg/ml. Based on antifouling rate analysis and regaining rate it is known that the concentration of the most effective that can be used as an antifouling is a concentration of 75 mg/ml. This is because a concentration of 75 mg/ml of local sea cucumber methanol extract (Phyllophorus sp.) can already inhibit paste macrofouler Nerita sp. The concentration of 75 mg/ml also has a large regaining rate of 85%.

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