Jurnal Kelautan dan Pesisir merupakan jurnal ilmiah open access dan peer reviewed yang diterbitkan oleh Program Studi Ilmu Kelautan, Fakultas IPA dan Kelautan Universitas OSO semenjak tahun 2024. Jurnal ini bertujuan untuk mendiseminasikan hasil riset pada bidang Ilmu Kelautan dan serumpunnya. Jurnal diterbitkan setiap dua kali setahun (Bulan Juni dan Desember). Tiap artikel di review oleh ahli sesuai bidang dalam double blind peer-review sebelum diterima untuk dipublikasikan. Jurnal ini memuat artikel penelitian original, artikel review, dan short communication, dalam lingkup: Ekologi dan biologi kelautan dan pesisir, teknologi kelautan, bioteknologi, manajemen sumberdaya perairan, budidaya perikanan, proses dan dinamika kelautan, konservasi laut, pencemaran laut, pengelolaan sumber daya laut dan pesisir, teknologi pengolahan kelautan dan perikanan, geologi kelautan, teknologi penangkapan ikan, oseanografi fisika dan kimia.
Program Studi Ilmu Kelautan, FIPAK, Universitas OSO
THE EFFECT OF ENSO ON RAINFALL AND CHLOROPHYLL-A VARIABILITY IN THE WATERS OF PULAU LAUT
The waters of Pulau Laut have considerable marine and marine resource potential. The waters of the Pulau Laut cluster have been studied for the feasibility of mariculture (cage farming, floating nets) based on oceanographic and water chemistry parameters. Coastal areas and small islands such as Pulau Laut are also seen as potential locations for marine ecotourism development. This study aims to analyze the influence of the El Niño Southern Oscillation (ENSO) phenomenon on rainfall variability and chlorophyll-a concentration in the Pulau Laut waters. This study is relatively new, considering that there are not many previous studies that specifically discuss the relationship between ENSO, rainfall, and chlorophyll-a in this area. This study uses satellite-based observation data. The rainfall and chlorophyll analyzed cover a 16-year period, from 2007 to 2022. The rainfall data was taken from the Global Satellite Measurement of Precipitation (GSMaP) available through JAXA Global Rainfall Watch with a spatial resolution of 0.10°. Chlorophyll-a concentration data were obtained from the Ocean Color CCI (OC-CCI) Level 3 Standard (L3S) product provided by Marine Copernicus. The research method refers to a quantitative approach as described by, where numerical data are statistically analyzed and displayed through graphs and maps as a form of visualization. All temperature, wind, chlorophyll, and rainfall data are processed spatially using IDL (Interactive Data Language) software. Analysis of the relationship between ENSO and rainfall and chlorophyll-a in the waters of Pulau Laut shows that in the west season there is no significant relationship between ENSO and rainfall, indicated by a p-value of 0.595 (>0.05) with a correlation of -0.079, reflecting a very weak negative relationship. In the east season, the relationship becomes significant, with a p-value of 0.008 and a correlation of -0.378, indicating that the stronger El-Nino, the rainfall tends to decrease. In the west season, there is a significant relationship with a p-value of 0.000 (<0.05) and a correlation of -0.525. This indicates that during the west monsoon, an increase in ENSO (leading to El Niño) is associated with a decrease in chlorophyll-a concentration with a moderate relationship strength. ENSO does not significantly affect rainfall on Laut Island during the west monsoon, but it does significantly affect rainfall during the east monsoon because rainfall decreases when El Niño strengthens. Chlorophyll-a during ENSO actually shows a significant effect during the west monsoon, where its concentration decreases when El Niño increases, while in other seasons the effect is inconsistent.
Copyright (c) 2025 JKP - Jurnal Kelautan dan Pesisir
Correlation of C/N Ratio Value with Total Bacteria in Vaname Shrimp Aquaculture Wastewater in Gerokgak, Buleleng
Abstract The study was conducted in Pejarakan Village, Gerokgak District, Buleleng, Bali. The objective was to determine the value and correlation of the C/N ratio with the total bacteria in the wastewater of vannamei shrimp aquaculture. Bacteria spread in the water column and sediment surface and exhibit faster population growth when the C/N ratio is optimal. The study was conducted from October to December 2024 using a descriptive quantitative research method, with purposive sampling from two stations in different vannamei shrimp aquaculture locations. Carbon, nitrogen, and total bacterial content were measured using the Walkley-Black method, Kjeldahl method, and Total Plate Count (TPC), respectively. The results showed average C/N ratios of 12.84 ± 4.10 at station one and 15.94 ± 9.43 at station two. The average total bacterial counts were 1.0 x 105 CFU/ml at station one and 3.2 x 104 CFU/ml at station two. The C/N ratio and total bacterial counts were within safe values for aquaculture wastewater, while correlation tests showed a negative relationship at both stations, with a strong correlation at station one and a weak correlation at station two.
Design and Development of a Semi-Natural Turtle Egg Hatching Monitoring Tool “Turtle House” Based on the Internet of Things (IoT)
Manual monitoring of temperature and humidity in sea turtle egg incubation processes presents several limitations, particularly in terms of time efficiency, data accuracy, and continuous monitoring capabilities. To address these issues, this study aims to design and te st an Internet of Things (IoT)-based turtle egg incubator device called Turtle House. The device utilizes an ESP-32 microcontroller integrated with a DS18B20 temperature sensor, a DHT-22 humidity sensor, a heater, a fan, a mist maker, and a CCTV camera. This system allows real-time monitoring of temperature and humidity via the Thingspeak platform. The research was conducted from 2023 to 2024 for the design and development of the device, while placement and data collection were carried out in 2025 at the Instrumentation and Robotics Room, Fisheries, Marine, and Hatchery Laboratory, Faculty of Agriculture, Fisheries and Marine Sciences, University of Bangka Belitung. Turtle Eggs Recommended Brin Sdg Access Permit, East Belitung Regency, a conservation area actively managed through a collaboration between PT Penyu Lima Konservindo and the Natural Resources Conservation Agency and (DIRJEN KSDAE SIMAKSI). The sensor accuracy test results showed low Root Mean Square Error (RMSE) values, namely 0.18708 for temperature, 0.10801 for sand humidity, and 0.29664 for room humidity. These results indicate that the device operates accurately and is reliable for artificial incubation of sea turtle eggs.
Sea Turtle, Temperature, Humidity, Internet of Things, Turtle House
Hubungan Panjang–Berat dan Morfometrik Gastropoda di Ekosistem Mangrove Pulau Tunda
Penelitian ini mengkaji variasi morfometrik serta hubungan panjang–berat dua spesies gastropoda, Terebralia sulcata dan Clypeomorus batillariaeformis, yang menghuni ekosistem mangrove Pulau Tunda. Pengambilan sampel dilakukan menggunakan metode transek kuadrat pada tiga arah pengamatan (utara, timur, dan selatan), menghasilkan 59 individu dengan dominasi Terebralia sulcata. Analisis morfometrik menggunakan Principal Component Analysis (PCA) menunjukkan bahwa transek selatan memiliki keragaman bentuk terbesar, terutama dipengaruhi oleh ukuran aperture, sedangkan variasi pada transek timur dan utara lebih ditentukan oleh dimensi cangkang. Analisis hubungan panjang–berat menggunakan model regresi allometrik menunjukkan korelasi positif pada kedua spesies, dengan nilai koefisien determinasi lebih tinggi pada Terebralia sulcata, yang menandakan konsistensi pertumbuhan yang lebih stabil dibandingkan Clypeomorus batillariaeformis. Hasil ini menegaskan adanya perbedaan pola pertumbuhan dan karakter morfometrik antarspesies, yang mencerminkan strategi biologis masing- masing dalam memanfaatkan ruang dan sumber daya di ekosistem mangrove. Secara keseluruhan, penelitian ini memberikan gambaran komprehensif mengenai variasi struktur tubuh serta hubungan dimensi morfometrik kedua spesies gastropoda, sehingga dapat menjadi dasar bagi kajian lanjutan terkait ekologi, pertumbuhan, maupun dinamika komunitas gastropoda di kawasan pesisir.
gastropoda, morfometri, panjang–berat, Pulau Tunda
Primary Productivity of Kappaphycus alvarezii Based on Initial Biomass Differences in Bone-Bone Waters
Primary productivity is an important factor in marine ecosystems, as it plays a vital role in the carbon cycle and food chain for heterotrophic organisms. The purpose of this study was to determine the level of primary productivity and analyze how the initial biomass of K. alvarezii produced in Bone-Bone Waters differs. The benefit of this study is that it can provide information and help strengthen understanding of the role of K. alvarezii in supporting primary productivity and the balance of the Bone-Bone aquatic ecosystem. This study was conducted from November 2024 to March 2025 at Bone-Bone Beach, Bau-Bau City, Southeast Sulawesi. The results showed that the initial biomass treatment of 30 g produced the highest gross and net primary productivity values ​​compared to the 10 g and 20 g treatments. The respiration value in the treatment with a higher biomass was due to increased tissue metabolic activity. Higher biomass means there are more physiologically active cells, so the respiration process also increases.
Analysis of Primary Productivity of Waters in Jakarta Bay
The Jakarta Bay is a coastal area that receives input from 13 major rivers and various anthropogenic activities, making it vulnerable to environmental degradation. This study aims to analyze the primary productivity of Jakarta Bay by identifying limiting factors from physical, chemical, and benthic aspects. This research uses a quantitative descriptive approach by utilizing secondary data from previous studies, monitoring reports, and official data from relevant agencies. The results show that high turbidity, fluctuations in temperature, salinity, and low dissolved oxygen are the main physical factors that limit light penetration and reduce photosynthesis efficiency. From a chemical perspective, excess nutrients such as nitrates and phosphates, along with heavy metal pollution, trigger eutrophication, phytoplankton blooms, and oxygen depletion. From a benthic aspect, the dominance of tolerant species, low diversity, and the presence of foraminifera with abnormal shells indicate ecosystem degradation in coastal and estuarine areas, while relatively stable conditions are found in the open sea. To maintain the sustainability of the ecosystem, integrated management is required through the control of nutrient loads, periodic monitoring of water quality, and the restoration of coastal ecosystems such as mangroves, seagrasses, and coral reefs. These efforts are expected to preserve ecological functions while also supporting the continuity of coastal community activities.
Primary productivity, Jakarta Bay, water quality
Analysis of Community Sensitivity to the Sea Turtle Conservation Area in Serangan Village, Bali
The sea turtle conservation area in Serangan Village, Bali, has high ecological and socio-cultural value, so the success of managing this area really depends on the active participation of the local community. This study aims to find out how aware people are of the sea turtle conservation area and the factors that influence this awareness. The method used in this study is a quantitative and qualitative descriptive approach with data collection through questionnaires that were distributed to 364 respondents selected purposively. The results of the study show that the community has a high level of sensitivity due to their involvement in conservation activities, such as breeding, education, and ecotourism. Factors influencing awareness include local cultural values, environmental education, and the active role of community monitoring groups. This study emphasizes the importance of community empowerment, strengthening local institutions, and integrating sociocultural values into conservation policies to support sustainable management of the area.
Analisis Kesesuaian dan Strategi Pengembangan Ekowisata di Pantai Karang Jahe, Rembang, Jawa Tengah
Pantai Karang Jahe menjadi salah satu pantai dikawasan pesisir pantai utara yang dimanfaatkan sebagai kawasan wisata pantai dan menjadi salah satu pantai paling banyak dikunjungi di Kabupaten Rembang. Penelitian ini bertujuan untuk menganalisis kesesuaian Kawasan Pantai Karang Jahe, Kabupaten Rembang Jawa Tengah, sebagai destinasi ekowisata serta merumuskan strategi pengembangan kawasan secara berkelanjutan. Pantai Karang Jahe memiliki potensi ekowisata yang besar dengan di dukung oleh kondisi fisik dan adanya Kawasan konservasi ekosistem terumbu karang. penelitian ini dilakukan menggunakan metode survei langsung. Analisis yang digunakan meliputi pengukuran kualitas perairan, perhitungan indeks kesesuaian wisata (IKW), daya dukung kawasan (DDK), serta analisis SWOT untuk perumusan strategi pengembangan. Hasil penelitian menunjukan bahwa Pantai Karang Jahe masuk kedalam kategori “Sangat Sesuai” untuk dijadikan kawasan ekowisata rekreasi pantai. Berdasarkan hasil kuesioner, responden menunjukan presepsi dan aspirasi positif terhadap pengembangan ekowisata di Kawasan ini. Pengembangan perlu dilakukan dengan memeperhatikan aspek konservasi lingkungan, daya dukung Kawasan serta partisipasi aktif dari berbagai pemangku kepentingan untuk menjamin keberlanjutan dan manfaat ekonomi bagi masyarakat lokal.
Diversity, Evenness, and Dominance of Coral Biota on the Eastern and Western Sides of Tarahan Island, Bojonegara District, Banten
Tarahan Island is a small island located in the northern part of Banten Province, Indonesia. Its proximity to the industrial zone near Bojonegara, Banten, makes it susceptible to pollution, leading to a decline in the diversity, evenness, and dominance of biota inhabiting dead coral reefs in the area. The objective of this study was to determine the diversity index, evenness index, and dominance index of biota on dead coral at Tarahan Island, Banten. The research focused on two sampling stations: the western and eastern sides of the island, using a random sampling method. The findings revealed both similarities and differences in species composition between the two stations. At the western station, 4 phyla comprising 24 species were identified, while the eastern station recorded 4 phyla with 21 species. The calculated diversity index (H') was 2.83 for the western station and 2.55 for the eastern station. The evenness index (J') was 0.90 (west) and 0.84 (east), while the dominance index (D) was higher at the eastern station (0.12) compared to the western station (0.08). By analyzing these indices in relation to the aquatic conditions of Tarahan Island, conclusions can be drawn regarding the ecological stability of the biota inhabiting the dead coral reefs.
Arthropod Diversity in Seagrass Ecosystems in the Eastern part of Tarahan Island, Serang Regency, Banten
Tarahan Island, Banten, has the potential for coastal ecosystem wealth, including seagrass beds and various other biodiversity. However, scientific information on the diversity of Arthropods and the condition of seagrass there is still minimal, so researchers conducted research on information on the diversity of Arthropods and the condition of seagrass on Tarahan Island. Through a purposive sampling technique considering the density and distribution of seagrass in the research area, the results of the study showed the presence of a dominant seagrass species Thalassia Hemprichii with a seagrass ecosystem health index (IKEL) score of 0.25 indicating very poor conditions due to low seagrass cover and density. The Shannon-Wiener arthropod diversity index (H') of 3.07 indicates high diversity with the dominance of the Gastropoda class (15 species). However, the uniformity index (E = 0.11) indicates non-uniform species diversity, compared to the dominance index (D) which justifies the dominance of Gastropoda over other classes.
Comparative Analysis of Crustacean Diversity in Dead Coral and the Eastern Coastal Area of Tarahan Island.
In this study, the species diversity of crustaceans in two different habitats on the eastern side of Tarahan Island—coastal and dead coral reef areas—will be compared, and their link to water quality will be investigated. Purposive sampling and handpicking methods were used for the sample process. Dissolved oxygen (DO) and biochemical oxygen demand (BOD) metrics were used to evaluate the quality of the water. According to the findings, there were more species and individuals in the coastal area than in the habitat of dead coral. A balanced community was indicated by the moderate Shannon-Wiener diversity index (H') in both locations (1.94 and 1.96) and the low dominance index (C) (0.1). Water quality met aquatic life standards. The structure of crustacean communities is influenced by variations in habitat features and environmental quality, which also act as ecological indicators.
Crustacea, Keanekaragaman, Kualitas Air, DO, BOD
The Effect of Habitat Differences on the Distribution of Mollusc Communities on the North Coast of Tarahan Island, Banten
This study examines the diversity of mollusks in Tarahan Island, Banten Bay, which has coastal ecosystems such as coral reefs, macro algae, and debris. Samples were taken from three stations using purposive sampling method. Data analysis included ANOSIM to test for differences in community structure across habitats and nMDS to visualize species distribution patterns. The findings showed that coral reef ecosystems had the highest species diversity, while rubble had the lowest variation. Species such as Turbo argyrostomus contributed significantly to community variation between habitats. The R value obtained from ANOSIM showed that the differences between habitats were not statistically significant, suggesting that environmental factors such as food availability and water quality have more influence on mollusc distribution than habitat substrate type. This study confirms that Tarahan Island is a significant area for representing mollusc diversity, especially in recognizing the distribution and variation of species in its coastal habitats..
Mollusca, Tarahan Island, Biodiversity, Habitat
Study of Microplastics Content in Lorjuk Clams (Solen sp.) in Dusun Pesisir, Kaduara Timur Village, Sumenep Regency, East Java
Microplastics are very small fragments, which are less than 5 mm, the result of degradation of plastic waste. Solen sp. or lorjuk clams are included in the Solenidae family, which is a type of filter feeder animal or filters the surrounding water to get food so it is very likely that microplastics will also be eaten. The research location is located in Pesisir Hamlet, East Kaduara Village, Sumenep Regency where local residents still dispose of garbage into the sea. The purpose of this study was to analyze the concentration and characteristics of microplastics in Solen sp., as well as the relationship between length and weight of Solen sp. on the amount of microplastics. Sampling was carried out by random sampling method and obtained a total sample of 138 samples and divided into 3 classes based on the length of the shell. Class 1 shell length was 2.80 – 3.14 cm for 22 samples, class 2 was 3.15 – 3.54 cm for 78 samples, and class 3 was 3.55 – 4.00 cm for 38 samples. The average value of microplastic concentration in Solen sp. that is equal to 23.81 items/g in class 1, in class 2 that is 13.26 items/g, while in class 3 that is 7.11 items/g. The microplastic content found in lorjuk shells or Solen sp. 328 particles were found in the form of fragments, 251 particles in the form of pellets, 405 particles in the form of fibers, and 293 particles in the form of films. The colors of the microplastics found were black, blue, yellow, red, purple, green, white and transparent. Shell length and Solen sp weight have a very weak correlation to the amount of microplastics.
Analysis of Coral Life Form Based on Oceanographic Parameters in Ayer Island, Thousand Islands
Coral reefs are aquatic ecosystems that play a crucial role in marine life. Coral reefs have a highly sensitive relationship with oceanographic parameters, which can influence the diversity of coral growth forms. The purpose of this study is to understand the relationship between lifeform diversity and oceanographic parameters in Pulau Ayer, Kepulauan Seribu. The Underwater Photo Transect (UPT) method was used for data collection, and the CPCe (Coral Point Count with Excel extensions) software was employed for data analysis based on observations. Principal Component Analysis (PCA) was used in data processing and in analyzing the relationship between growth form diversity and oceanographic parameters. The data analysis results show that the most abundant or dominant growth forms in Pulau Ayer waters are the branching form with the genus Acropora (ACB), the encrusting form with the genus Acropora (ACE), and the massive form (CM). The diversity of these growth forms is influenced by oceanographic parameters; for example, ACB can thrive in clear waters with weak currents, while CM can live in areas with strong currents and high turbidity.
Distribution and Characteristics of Marine Debris in the Coastal Area of The villages of Banyubiru, Baluk, and Cupel, Bali
Marine debris is a living environmental problem that is now a global issue that attracts everyone's attention as it threatens marine ecosystems. The shipment of garbage from the State district crossing the Kaliakah and Ijogading rivers contributed to the scale of the waste distribution on the coast. The study aims to analyze the concentrations (quantity and weight), characteristics (type, weight, size and shape) and distribution of garbage stranded in the coastal areas of Banyubiru Village, Baluk and Cupel. The waste data collection method adopts the method developed by the Commonwealth Scientific and Industrial Research Organization (CSIRO) Global Plastic Pollution Project by naming the transec line vertically to the coastline three times. Deposits in the coastal areas of Banyubiru Village, Baluk and Cupel are scattered across the area with concentration values of marine garbage ranging from 1.20 to 6.71 items/m2 with an average of 2.74 items/m2 and the resulting concentration of massive marine waste ranges from 13.50 to 93.05 grams/m2, with average of 49.416 grams/m2. Based on the amount of garbage it is classified by the soft plastic class 30%, while weight it is dominated by the wood class 23%. The total weight of all types of marine waste is 37.370 grams. The size of trash is 16-21 cm2 29%. 46% of the waste in the coastal area is whole and 54% is fragmented. In general, coastal marine debris is mostly consumer products. Therefore, public awareness plays an important role in reducing the amount of garbage in the region.
Copyright (c) 2024 JURNAL KELAUTAN DAN PESISIR
Analysis of the Spatial Distribution of Flying Fish Catching Areas in the Arafura Sea Oceanographic Parameter Approach Maxent Method
The analysis of the spatial distribution patterns of flying fish (Hirundichthys oxycephalus) in the Arafura Sea is the main objective of this research, conducted using the Maximum Entropy (MaxEnt) methodology while considering oceanographic aspects. The data used includes the presence points of flying fish and oceanographic parameters such as sea surface temperature and chlorophyll-a concentration obtained from MODIS satellite imagery during the period from December 2023 to May 2024. The research results show that the MaxEnt model has good performance with an Area Under Curve (AUC) value of 0.748. The chlorophyll-a parameter contributes the most to the distribution of flying fish (69.8%) with a permutation importance value of 58.5%, while sea surface temperature contributes 30.2% with a permutation importance value of 41.5%. The potential fishing areas are concentrated in the central part of the Arafura Sea, with 66.10% of the catch points located in the Habitat Suitability Index (HSI) zone of 0.5-0.8. Flying fish show a habitat preference in the optimal temperature range of 29-31°C with a presence probability reaching 0.8-0.9. Jackknife analysis confirms that the combination of sea surface temperature and chlorophyll-a parameters produces a more accurate predictive model compared to the use of individual parameters. This predictive model can be used as a reference to optimize flying fish capture activities efficiently and sustainably in the Fisheries Management Area (WPP) 718.
Copyright (c) 2025 JURNAL KELAUTAN DAN PESISIR
Analysis of Oceanographic Parameter Distribution of Tembang Fish Using ArcMap Case Study of the Arafura Sea
The Arafura Sea is a water area that is rich in biodiversity, including tembang fish (Selar spp.), which have high economic and ecological value. However, fishermen often face obstacles in determining optimal fishing locations due to the lack of oceanographic information. This research aims to analyze the distribution of oceanographic parameters such as sea surface temperature (SST) and chlorophyll-a concentration using MODIS satellite imagery and ArcMap software. SST and chlorophyll-a data were processed using the Inverse Distance Weighting (IDW) method to produce a distribution map of oceanographic parameters in the Arafura Sea. The results show that the optimal SST for tembang fish ranges from 26°C to 28°C, with high chlorophyll-a concentrations (0.8–1.2 mg/m³) found in coastal areas. The combination of these two parameters identifies promising Fishing Potential Zones (ZPPI). These findings provide benefits for fishermen in reducing operational time and costs, as well as supporting the sustainability of fisheries resources. This research emphasizes the importance of using oceanographic data and geospatial technology to improve fishing efficiency and marine resource management.
Analisis Arah dan Kecepatan Arus Laut Di Perairan Pulau Pelapis, Kabupaten Kayong Utara
This research aims to examine the speed and direction of currents in the waters of Peputar Village, Dusun Raya, Karimata Islands District. Current data collection is carried out through direct measurements using conventional current kites at several observation points. The measurement results show that the current speed at the surface ranges from 0.0138 to 0.4082 m/s, with the dominant direction towards the southwest and northeast, indicating the influence of the monsoon winds. These data indicate the existence of weak current stratification, as seen from the relatively stable current speed at various depths. The current pattern found is also consistent with the Wyrtki current model, which explains the current circulation in Indonesian waters which is influenced by monsoon winds. The results of this study can be used to understand water dynamics that impact local ecosystems and local fishing activities.
Diversitas Fitoplankton Sebagai Bioindikator Kualitas Air Di Perairan Krueng Mane Aceh Utara
Phytoplankton is microscopic plants that live floating in the water column. Phytoplankton is organisms which lives depend on the quality of the water in a body of water. Phytoplankton also has a very important role in aquatic ecosystems. The function of phytoplankton as primary producers and links in the food web causes phytoplankton to often be used as a scale for measuring the fertility of waters. The aim of this research is to determine the diversity of phytoplankton as a bioindicator of water quality in the waters of Krueng Mane, North Aceh. The research was carried out in May 2024 in Krueng Mane waters using a purposive sampling method. A total of 16 types of phytoplankton were found. The types of phytoplankton that are most commonly found are Gyrososigma sp and Nitzschia sp which are included in the Bacillariophycea class. The total abundance of phytoplankton in this study ranged from 6350-7100 ind/l. In the research, the diversity index values ranged from 1.76 to 2.06, the uniformity index ranged from 0.80 to 0.85, the dominance index ranged from 0.17 to 0.20 and the saprobity index ranged from 0,35 to 1,00. The water quality parameter values are still in good condition for phytoplankton life.
Analisis Pasang Surut Perairan Pulau Pelapis, Kabupaten Kayong Utara
Pelapis Island is one of the islands located in Dusun Raya, Pelapis Village, District. Karimata Islands, Kab. North Kayong, Prov. West Kalimantan. The pelapis island consists of several other small islands, both inhabited and uninhabited. Pelapis village is a village that has a variety of potential natural beauty and abundant natural resources that can be enjoyed. Tides are one of the oceanographic parameters that have a big influence on waters. Tides are fluctuations in sea level due to the gravitational force of objects in the sky, especially the sun and moon, on the mass of sea water on earth. This research aims to analyze the characteristics of tides in the waters of Pelapis Island, North Kayong Regency. Analysis was carried out using a tide staff 350 cm long for 3 days every 1 hour for 24 hours. The results of the analysis show that the tidal pattern in the waters of Pelayang Island has a semi-diurnal tidal type or high and low tides that occur twice a day. From the observations we made in the waters of the Pelaway Island Water Pier, the lowest tide was at around 20.00 WIB, namely 61 cm and continued to rise slowly so that the highest peak tide occurred at 07.00-09.00 WIB at a height of 265 cm. Then sea water will experience a continuous decline. Factors that influence tidal characteristics in this region, such as astronomy, include the position of the moon and sun, as well as local meteorological conditions. In addition, this research also identifies the impact of climate change on tidal patterns, which can affect the ecosystem and economic activities of local communities.
Studi Kesesuaian Lahan Budi Daya Rumput Laut Eucheuma Cottooni Menggunakan Pendekatan Spasial Multi Kriteria Analisis di Pulau Pelapis
The research is aimed at finding a suitable location for sea grass cultivation in the waters of Pelapis Island, Karimata district, North Kayong, West Kalimantan Province. The research was done in June 2023. The method used in this research is quantitative with a field survey approach. The population in this study is the water area of Pelapis Island. The technique in sampling uses Purposive Sampling. The location of the samples is divided into 33 station points, based on the water area of Pelapis Island. The measurements were carried out against 10 water parameters that influenced the growth of seaweed, namely, current speed, brightness, wave, temperature, depth, pH, DO, salinity, nitrate, and posphate. From the overall results of the parameters obtained results with the sum of 2 categories of land suitability i.e. corresponding and not corresponding to the area of the criterion according to 667,201ha 96,47%, and does not correspond to the size of 24,3858ha 3,43%. Based on the results of this research, it can be concluded that the waters of the Pelapis islands are suitable for seagrass farming activities.
Seeagras, water quality, spatial analysis, pelapis island
Keanekaragaman Kepiting Bakau (Scylla spp.) di Kawasan Mangrove Desa Masbangun Kecamatan Teluk Batang Kabupaten Kayong Utara
Mangrove ecosystems as a coastal resource known as an important ecological function in supporting fisheries resources and is a very potential habitat for various aquatic biota. Mangrove crab (Scylla sp.) is one of the biota that has an ecological relationship with mangrove ecosystem areas with a high enough protein content to become one type of potential marine commodity. The purpose of this study was to determine the type and diversity of mangrove crabs found in the Mangrove Area of Masbangun Village, Teluk Batang District, North Kayong Regency. Determination of observation stations using purposive sampling method based on environmental hue. The results showed that the mangrove crabs found totaled 11 individuals consisting of 2 species, namely Scylla olivacea and Scylla tranquebarica. The diversity index value is low, ranging from 0-0.63, the uniformity value is high, ranging from 0-0.81, and the dominance value is moderate, ranging from 0.55-1. Aquatic environmental factors in the study area are included in the optimal range that can affect the presence and growth of mud crabs.
Mangrove Ecosystem, Mangrove Crab, Diversity
IDENTIFIKASI KOMPOSISI KEPADATAN SAMPAH LAUT (MARINE DEBRIS) DI WILAYAH PESISIR PULAU PELAPIS KEPULAUAN KARIMATA
Pelapis Island is part of the Karimata Islands which are located in North Kayong Regency, West Kalimantan. The island, which is located west of the Karimata Strait and close to the Karimata Islands Marine Nature Reserve, has tourism potential and abundant natural resources that can be utilized by the local community and the government. The cleanliness of the marine environment needs to be ensured in order to support sustainable economic continuity and support the tourism industry sector. This research aims to determine the density of marine debris using the shoreline survey method to determine the beach cleanliness index according to the clean-coast index (CCI), analysis of waste weight and type of waste was carried out at three stations spread across the coast of the island. The type of waste that dominates is wood with waste weight reaching 68% from the three stations. Plastic types with 21%, metal types with 7%, rubber types with 3% and then glass types with 1%. The beach cleanliness index measured at each research station showed different results. Based on the results of the CCI analysis, station 1 received a score of 35 and was included in the very dirty category, Statsuin 2 received a score of 12.96, which was included in the dirty category, a fairly low score at station 3, namely 4.04, which was included in the clean category. Overall, the results of data collection from three research stations show that Pelalui Island still has the potential to become a beach tourism destination by continuing to increase efforts to maintain cleanliness and environmental sustainability.
: Marine debris, Pelapis Island, shoreline survey, clean-coast index
IDENTIFIKASI TUTUPAN TERUMBU KARANG DI PANTAI WISATA PULAU LEMUKUTAN KABUPATEN BENGKAYANG
The coral reef ecosystem in West Kalimantan is mostly found on the Lemukutan Island Tourism Beach, Bengkayang Regency. Lemukutan Island has an area of 1,235 Ha and has potential marine resources that can be developed and utilized by the surrounding community and the government. The aim of this research is to determine the percentage of coral cover in Surau Bay and Cina Bay. The research used the Underwater Photo Transect (UPT) method with a line transect of 50 m and a square transect measuring (58 x 44) cm². The photo shoot results were then analyzed using Coral Point Count with Excel Extensions (CPCE) computer software to obtain coral cover data and coral lifeform categories. The research results for stations 1 and 2 show Hard Coral (HC) cover of 43.80% and 35.33%. HC cover at both stations is in the medium category. The percentage of Dead Coral (DC) for stations 1 and 2 is 21.73% and 19.40%. There are several coral lifeforms in the observation area, namely Acropora Branching (ACB), Acropora Tabulate (ACT), Coral Heliopora (CHL), Coral Mushroom (CMR), Coral Encrusting (ACE), Coral Foliose (CF), and Coral Massive (CM).
Identification, Cover, Coral Reefs, Lemukutan