Jurnal Ilmu dan Teknologi Perikanan Tangkap
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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)
Full text linkGracilaria 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
Full text linkThe 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
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
No full textBitung 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
Pengaruh kemiringan pada bagian sayap terhadap kelajuan tenggelam tali pemberat alat tangkap pukat cincin
Full text linkPurse 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
Kajian tentang jenis umpan buatan pancing tonda terhadap hasil tangkapan
Full text linkThe 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)
Kontribusi perikanan pukat cincin yang berpangkalan di Pelabuhan Perikanan Pantai Tumumpa terhadap PDRB Kota Manado di masa Covid-19
Full text linkCovid-19 brought their intensive effects in marine fishery subsector in Manado by the end of 2019. The research aimed at finding out how far the effect of purse seine fishery contribute on Gross Regional Domestic Product (GRDP) Manado between before and after Covid-19. Secondary data collected from of BPS Manado dan North Sulawesi in 2018 - 2022, while primary data i.e purse seiner’s catches and its value production from the annual reports of Tumumpa coastal fishing port by direct observation on board. Data was analyzed using Location Quotient (LQ) approach. The result of data analysis showed, there was a declining production during Covid-19 due to a lack of fishing operation activities, having a consequence in fish production value decreasing, because the fish distribution obstruction from the centres of producer to the centres of consumer. Before Covid-19 period, it gained the average catches of 10,7 million tons.yrs-1 (increasing 17,46% yrs-1), with production value of Rp. 159,6 billion yrs-1 (increase 23,23% yrs-1). During Covid-19, average cathes of purse seiner was 11,3 billion tons yrs-1 (decline 8,25% yrs-1) and production value of Rp. 204,3 billion yrs-1 in average (decline of 8,30% yrs-1). Purse seine fishery contribution on GRDP Manado decrease from 0,10% yrs-1 before Covid-19 (2017-2019) to - 0.42% yrs-1 during Covid-19 (2020-2012). During these two periods, (marine) fishery subsector had a LQ < 1, meant that this subsector was really not a basis of the subsector. To fulfill the Manado society consumption on fishes, it is required to supply fishes from other locations. The other side, the business of purse seiner fishery brought an agreeable advantage
Rekonstruksi bentuk lambung kapal dalam format tiga dimensi (3D) dengan teknik fotogrametri
Full text link 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
Kapasitas palka utama dan pemalkaan hasil tangkapan km dominica yang berpangkalan di PPP Tumumpa
Full text linkWawancara 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)
Studi pemanfaatan fasilitas di pangkalan pendaratan ikan Amurang Kabupaten Minahasa Selatan
Full text linkIt can be said that a fishing port has carried out its functions properly if all the facilities owned by the port, including the main facilities, functional facilities, and supporting facilities, are in accordance with what is expected. This research was carried out by following the descriptive method. The data taken in this study are primary data and secondary data. PPI conditions were analyzed descriptively. The steps taken to analyze the condition of the facilities are (a) taking an inventory of the types and conditions of existing facilities; (b) collect data on the size and capacity of each facility, and (c) look at the procedures for using the facility, whether it is in accordance with its function. The main facility is a facility at a fishing port that is used for mooring and berthing of fishing vessels and minimizes natural disturbances and shipping safety. The main facilities at the Amurang Fish Landing Base include the Harbor Pool Pier, Complex Roads, Mooring Poles. Functional facilities are said to be superstructures where these facilities function to increase the use value of the main facilities that can support activities at fishing ports. These facilities, among others, do not have to exist in a port, but these facilities are provided in accordance with the operational needs of the port. Functional facilities at the Amurang Fish Landing Base include Fish Auction Sites, SPDN (Solar Packed Fishermen Dealers), Cold storage, Packing Buildings Supporting facilities are facilities at fishing ports that can indirectly help and support the activities of fishing communities and even the general public Mess Office Extension Post Guard Post
Variabilitas musiman terhadap hasil tangkapan Tuna Madidihang (Thunnus albacares): Seasonal variability of catch results of madidihang tuna (Thunnus albacares)
Full text linkFishermen 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%)