Studi Konstruksi Bagan Apung Milik Nelayan Kelurahan Batu Putih Atas Kota Bitung: Study of the Construction of Floating Fish Aggregating Devices Owned by Fishermen in the Batu Putih Atas Subdistrict, Bitung City

Bitung City is one of the centers for fisheries production, with the main commodity being capture fisheries, specifically small pelagic fish (mackerel scad (decapterus), mackerel fish (Rastrelliger), tuna (Euthynnus affinis) , and anchovy (Stolephorus indicus)). The purpose of this research is to describe the construction of a floating net cage to support the successful capture of small pelagic fish. The study was conducted from October to December 2024. The data collection methods used were observation and direct interviews with fishermen, and the data were analyzed using qualitative descriptive analysis. The results of the study show that the construction of the lift net includes: a wooden frame measuring 9.5 x 8.5 meters, wooden and net enclosures measuring 3x3 meters, 24 LED lights, a polyethylene net (Cang) measuring 9.5x8.5 meters, a guard house made of wood measuring 2x2 meters, 15 river stones as weights, 4 sand-filled anchors in bags, 12 brass rings, 1 wooden reel, and 24 styrofoam buoy floats

Evaluasi efektivitas padat tebar yang berbeda pada sistem ekstensif polikultur terhadap pertumbuhan dan kualitas agar rendemen rumput laut (Gracilaria verrucosa): Assessment of varying stocking densities in extended polyculture systems on the development and yield quality of seaweed (Gracilaria verrucosa)

Gracilaria verrucosa is a kind of seaweed with significant potential for pond culture, particularly among farmers, since it serves as the primary source of agar production, which is experiencing rising demand. Nonetheless, pond output remains insufficient to satisfy market demands, necessitating innovation in cultivation methods and enhanced production efficiency. The researcher intends to assess the efficacy of various stocking densities in an extended polyculture system on the growth and quality of agar production from Gracilaria verrucosa seaweed. This research employs a quantitative approach utilizing an experimental methodology. This study had a fully randomized design (CRD) with three treatments, each replicated three times. Treatment A (Density 150 g/cm³), Treatment B (Density 200 g/cm³), Treatment C (Density 250 g/cm³). This study method employs a test medium container designed as a net, into which seaweed lips are placed, followed by a 35-day observation of growth. Data analysis was conducted utilizing analysis of variance, succeeded by the Tukey test, with a confidence level of 95% (p<0.05). Varied stocking densities influenced the development of Gracilaria verrucosa, the effectiveness of good stocking density in treatment A (150g) obtained the highest absolute length of 8g for 35 days

Performa Teknis Kapal Handline Anita Jaya X di Pelabuhan Perikanan Samudera Cilacap: Technical Performance of Handline Vessel Anita Jaya X at Samudera Cilacap Fishery Port

The fishing industry is a vital sector for the global economy and food security because this industry plays a role in providing food and economic income for business actors. However, the fishing industry also often faces challenges such as competition to obtain supplies of fresh fish raw materials. The decline in the quality of caught fish is also influenced by handling that does not comply with standards or inadequate storage conditions. The loading capacity of a ship is influenced by the value of the ship's displacement, the ship's dead weight, and the weight of the empty ship. Therefore, this research aims to estimate the value displacement, empty ship weight (Light Weight Ton/LWT), ship dead weight (Dead Weight Tonnage/DWT), and the maximum amount of catch that can be loaded on the ship. Collecting research data by taking ship measurements and interviews. The sampling technique is carried out randomly accidental sampling. The research results show that the Anita Jaya X ship has value displacement amounting to 72.02 tons, empty ship weight (Light Weight Ton/LWT) of 12.15 tons, and ship dead weight (Dead Weight Tonnage/DWT) of 59.87 tons. Therefore, it can be concluded that to avoid a decrease in the quality of caught fish due to mismatches in the loading capacity and hold of caught fish then the Anita Jaya X can load up to 53.71 tons of fish

Variabilitas musiman terhadap hasil tangkapan Tuna Madidihang (Thunnus albacares): Seasonal variability of catch results of madidihang tuna (Thunnus albacares)

Fishermen in North Buru often depend on seasonal changes in tuna madidihang abundance to plan their fishing operations. However, a more comprehensive understanding of how this seasonal variability affects catches and its implications for fisheries management is still an important research subject. The research was conducted in Wailihang Village, Waplau District, North Buru Regency, between October and December 2022. The observational method was used for this study, where available and precise time series data owned by the Indonesian Community and Fisheries Foundation (MDPI) was collected. The collected data is the number of catch productions (kg) and the total length of fish (cm) from each haul. Yellowfin tuna production tends to fluctuate, with the highest catch (CPUE) occurring in September (63.8%) and the lowest in June (34.2%). The west season and east seasons have a total catch of 556 fish (45.42%), with 382 fish (31.21%) caught during the east season and 174 fish (14.22%) caught during the west season. The distribution of fish length varies in the east season compared to the west season. The west season catches more fish, but they are generally small-sized, while during the east season, large fish dominate, with the highest presentation (38.67%)

Kapasitas palka utama dan pemalkaan hasil tangkapan km dominica yang berpangkalan di PPP Tumumpa

Wawancara kepada Bapak Yusak pemilik kapal KM Dominica yang berpangkalan di PPP Tumumpa menyatakan bahwa adakalanya hasil tangkapan yang didaratkan mengalami penurunan kualitas yang disebabkan oleh faktor cuaca buruk maupun faktor penanganan di atas kapal yaitu susutnya es pada sistem rantai dingin. Tujuan penelitian ini adalah: 1) Mendeskripsikan sistem pemalkaan hasil tangkapan, 2) Mengetahui volume palka, nilai faktor penyimpanan, dan kapasitas muat hasil tangkapan. 3) Mengetahui kualitas akhir hasil tangkapan pada saat pembongkaran. Metode yang digunakan dalam penelitian ini adalah metode deskriptif. Hasil pengukuran volume palka 5 dan 6 sebagai tempat penyimpanan ikan adalah masing-masing sebesar 8,936 m3 dan 8,84 m3. Nilai faktor penyimpanan ikan yang diperoleh berkisar antara 0,25–0,37 ton/m3. Nilai perbandingan penyimpanan rata-rata antara ikan : es : air laut adalah 1:0,91:0,84. Kapasitas muat ikan yang diperoleh pada palka 5 dan 6 masing-masing adalah 3.04 dan 2.92. Metode pendinginan yang digunakan adalah menggunakan air laut yang didinginkan dengan es (ALDI). Rata-rata waktu pengontrolan air lelehan es adalah setiap 13.42 jam. Suhu akhir pada sampel lima ikan layang segar adalah 11°C. Hasil uji organoleptik kenampakan pada lima sampel ikan layang segar adalah 7.3 (SNI 2729:2013)

Rekonstruksi bentuk lambung kapal dalam format tiga dimensi (3D) dengan teknik fotogrametri

        Fishing boat has unique characteristics, such as seaworthiness, maneuvering, boat’s velocity, displacement, fishing gear layout, and catch storage facilities. With increasing development of photographic technology, photography is not merely an art but it has become a field of mathematics, making it a technique that can be integrated with software technology designed to produce digital data objects in the form of 3D images called Photogrammetric technique. This study is to obtain the reconstruction of the boat's hull based on the Photogrammetric software, to determine the effect of photography to obtain a 3D image, and to know the weakness and strength of 3D reconstruction of the boat’s hull. The images in this study were obtained using a POCO F3 smartphone camera integrated with the PIX4Dcatch application and analyzed with Agisoft Metashape Professional (Trial Version). From this research, we concluded that 1) the reconstruction of the boat hull can be obtained by using Photogrammetric techniques in the PIX4Dcatch application followed by the Agisoft Metashape Professional (Trial Ver.) software analysis; 2). With photographic equipment and several data processing software, the boat’s shape could be produced in 3D images, and 3). There are several advantages in reconstructing the ship's hull with the Photogrammetric technique, namely producing the ship's reconstruction of 3D images, obtaining the principal dimensions of the boat, such as the area and volume of the boat, that could be as the basic data for boat resistance and ship stability calculation, and the work could be done by one person only

Analisis produktivitas alat penangkapan gurita yang dioperasikan menggunakan umpan tiruan: Productivity analysis of octopus fishing gear operated using artificial bait

The objective of this study is to ascertain the differences in catches of octopus fishing, as well as to determine the productivity of octopus fishing gear using bole-bole and pocong-pocong. This research was conducted in October and November 2023 in the waters of Langkai Island and Lanjukang Island, Makassar City. The methodology employed in this research is a case study. Primary data were collected directly by following, recording, and identifying the number of catches, the size of the catch, and the length of time to operate the fishing gear. The data were then analysed using the T-test to determine the difference in catches on octopus fishing rods using bole-bole and pocong-pocong. The results of the study during 31 trips yielded a total of 92 fish. The catch of pocong-pocong is more likely to result in the capture of an octopus, with a value of 59% of octopus caught compared to bole-bole, which is 41% of the total hauling of 218 times. The pocong-pocong had a higher productivity with an average value of 57.81 grams per minute compared to bole-bole with an average value of 47.29 grams per minute during 31 fishing trips. The results of the statistical analysis using the T-test demonstrated that there were differences in the catches between the two fishing gears. The pocong-pocong had a higher catch than bole-bole

Kajian tentang jenis umpan buatan pancing tonda terhadap hasil tangkapan

The aim of this research is to determine the differences between two types of artificial bait on troll line on catches and to identify the composition of catch types based on bait type. This research was carried out in Tanawangko waters and was carried out from February to March 2023 using the experimental fishing method, where two pancing tonda  each using silk fiber and chicken feather bait were operated simultaneously in one boat for 5 trips which were then analyzed using the t test. The catch during the research was 24 individuals with 3 species, namely with silk fiber bait, 20 individuals were caught consisting of 3 species and using chicken feather bait, 4 individuals were caught consisting of 2 species. The analysis results show that tcount = 1.684 < t table = 2.776; so it accepts H0 and rejects H1. This explains that the use of chicken feather bait is not significantly different from silk fiber as trolling bait for catch results. The conclusion of this research is that using silk fiber bait resulted in more catches than chicken feather bait, but the results of the t test analysis showed that the two were not significantly different and the three species of fish caught were 15 skipjack tuna (Katsuonus pelamis), 7 baby tuna (Thunnus sp.), and 2 lemadang (Coryphaena hippurus)

Pengaruh kemiringan pada bagian sayap terhadap kelajuan tenggelam tali pemberat alat tangkap pukat cincin

Purse seine is a tool (gear) used to catch pelagic fish that form a swarm. As with other fishing gear, a purse seine unit consists of a net, a boat, and auxiliary equipment (rollers, lights, echosounders, and so on). Purse seine is a fishing gear classified in the surrounding net group. Purse seine is also known as a ring trawl because it is equipped with a ring that is used as a place to attach the coloring rope which is very important during the operation of the net. Because the net that was originally bagless will form a pocket at the end of the capture operation. The ring trawl itself has a different name in each region in Indonesia, in North Sulawesi it is known as soma pajeko. There are three technical factors that need to be considered for the success of ring trawl fishing, namely: (1) circular speed, (2) speed and depth of sinking ballast rope, and (3) speed of pulling the choir ropeThe speed of sinking is largely determined by the ballast, the type of material, the size of the thread and the size of the net bit, as well as the ratio of the length of the float rope and the ballast rope. The sinking speed of the ballast rope is calculated based on the relationship between the depth and the sinking time of the ballast rope needed. The speed of the ballast can be increased by increasing the weight of the ballast, but it must be considered because it will increase the tension of the net. Ballast weight per meter ballast ropeBut it should be considered because it will add tension to the net. Greater ballast weight per meter ballast rope will add greater sinking speed. The method used in this study is an experimental method, which is a study that looks for the influence of certain variables on other variables under tightly controlled conditions. The analysis in this study consisted of 4 net models with different slope percentages, namely 57%, 75%, 100% and 125% slopes. The results of the analysis showed that the more tilted the wing with a slope of 57%, 75% and 100%, the more the sinking rate of the ballast rope but for a slope of 125% it does not contribute to the speed of sinking 57% slope at a depth of 5.5 meters the required time is 16.37 seconds, 75% slope at a depth of 5.5 meters is 15.16 seconds, 100% slope at a depth of 5.5 meters the time required is 19.84 seconds and 125% slope the time required at a depth of 5.5 meters is 19.88 seconds. The best sinking speed of the four net models that have been made based on existing data is at 75% slope

Karakteristik dimensi utama kapal pukat cincin di Pelabuhan Perikanan Pantai Tumumpa: Main dimension of purse-seiner at Tumumpa Coastal Fishing Port

ABSTRACT The focus of this research is the Main Dimension Characteristics of Purse Seine Vessels based at the Tumumpa Coastal Fishing Port in Manado City, which includes the ratios or comparisons of the vessel's main sizes (LOA/BOA, LOA/D, and BOA/D), the relationships between the main sizes of the vessel (LOA vs BOA, LOA vs D, and BOA vs D), and the relationship of the main size of the vessel (LOA) with the carrying capacity (GT) and engine power (HP).The data analysis method was carried out using descriptive analysis through cross-tabulation and data presentation in the form of a curve of the relationship between the main ship sizes, the relationship between the main ship sizes, and the relationship between the main size of the ship's length (LOA) with load capacity (GT) and propulsion engine power (HP). Data analysis used the 'Curve Expert' application with a mathematical model: (1) the relationship between the main ship sizes using linear regression analysis Y=a+bx, and (2) the relationship between LOA with load capacity (GT) and propulsion engine power using non-linear regression analysis. The results of this study indicate that the comparison of the main dimensions of purse seine vessels in PPP Belang still has vessels that do not comply with the standard values proposed by Fyson (1985). There is a positive relationship between the main dimensions of the vessel (LOA/BOA, LOA/D, BOA/D) and between the main dimensions of the vessel (LOA) with load capacity (GT) and engine power (HP).