Jurnal Teknologi Perikanan dan Kelautan

PENGUKURAN NILAI TARGET STRENGTH ANAKAN IKAN GABUS (Channa striata) KONDISI TERKONTROL DENGAN SIMRAD EK-15 ECHOSOUNDER

Gracia Tiffany Siahaan — 2024-09-27

Snakehead (Channa striata) is a carnivorous fish widely caught because of its savory meat taste. The existence of the snakehead in Indonesia is widely spread, but threats that continuously run over the snakehead juveniles might make them end up in extinction. It’s become important to analyze the relationship between Target Strength (TS), and total length of snakehead juveniles using SIMRAD EK15 echosounder for resource management, as well as evaluating the health of the fish populations. The study was conducted using 15 individuals with a body length ranged 10-15 cm, and the average TS value ranged from -46.80 dB to -45.01 dB. The relationship between the total length of snakehead fish and the value of the target strength has a strong relationship (r-value of 0,8531 and a coefficient of determination (R²) of 0,7279), with the equation TS= 64,439ln(L) -215,66.

PENILAIAN DOMAIN SOSIAL EKONOMI DARI PENDEKATAN EAFM PADA PERIKANAN LEMURU DI PERAIRAN SELAT BALI

Yulia Estmirar Tanjov — 2024-09-27

Bali Sardinella (Sardinella lemuru) is a small pelagic species that is the focus of commercial fisheries and the primary target catch for fishermen at the fishery port of Pengambengan. This research aims to assess the management status of the Bali Sardinella fisheries at the fishery port of Pengambengan based on social and economic domains using the Ecosystem Approach to Fisheries Management (EAFM). This study is a survey research with a quantitative descriptive approach, using interviews and observations as data collection instruments. The data are obtained from interviews and observations of fishermen at the fishery port of Pengambengan. Fishermen respondents were randomly selected and considered representative, focusing on the lemuru species caught using purse seine fishing gear. Data analysis uses the EAFM analysis on social and economic domains, the flag model technique, and management actions for Bali Sardinella in the Bali Strait Waters. In terms of the social domain, fishermen at the fishery port of Pengambengan had a high category and were given a green flag, while in the economic domain, fishermen in the fishery port of Pengambengan fell into the low category, thus being given a red flag. The management actions for Bali Sardinella fisheries in the Bali Strait Waters, particularly those landed at PPN Pengambengan, are prioritized in the economic domain by increasing household income and savings ratio to improve the future economic condition of the fishermen at PPN Pengambengan.

BIOLOGI REPRODUKSI IKAN BELANAK (Planiliza subviridis) DI PERAIRAN PANTAI CILINCING, TELUK JAKARTA

Dwi Indah Susilowati — 2024-09-27

Anthropogenic activities trigger water pollution on the coast of Jakarta Bay, which can threaten the existence of mullet (Planiliza subviridis) stocks. This research aims to examine the reproductive biology of the fish in the Cilincing coastal waters. Sampling was carried out for 6 months (February-July 2023) in the waters using a gill net with a mesh size of 0,5-1,5 inches. The total samples of the fish collected were 204 individuals (123 males and 81 females), with a total length distribution of 15.50-26.25 mm. The results show that sex ratio (M/F) of the fish was 1.5:1. Based on the gonad maturity stages, quite a lot of fish were found in the mature and spent conditions in June-July. The highest mean values of the gonad maturity index (GSI) of the fish were in May and July (male), and April and July (female). The gonad maturity index of the female mullet was higher than the male one. The size of the first mature gonads of the fish were 163-175 mm (males), and 150-162 mm (females). The spawning season occurs in July with quite high reproductive potential. The fecundity of the fish ranged from 267,333 to 956,676 oocytes. Based on the distribution of the oocytes, mullets are thought to have a total spawner type of spawning.

STRATEGI PENGEMBANGAN PEMBUATAN KAPAL PERIKANAN FIBER DI PT JELAJAH SAMUDERA INTERNASIONAL

Muhammad Dhafa Dermawan — 2024-10-02

Fishing boat is the main capital of the fishing business. PT Jelajah Samudera Internasional, a shipyard company that builds fiberglass boats in Jepara Regency. This study aims to analyze critical aspects of the PT Jelajah Samudera Internasional shipyard, including human resources, fiberglass ship construction techniques, and business feasibility through descriptive and financial analysis, as well as to develop appropriate business development strategies. The research method used descriptive and purposive sampling methods. Research analysis included financial and SWOT analysis. Financial aspects were calculated using the NPV, PI, R/C Ratio, PP, and IRR methods, while SWOT analysis was used to determine development strategies. The research results show that PT Jelajah Samudera Internasional had well-organized human resources, a clear organizational structure, and consisted of permanent and temporary workers. The technical aspects of ship construction were in accordance with standards, with a lamination process using the hand-lay-up method according to SNI 8961:2021 and a complete ship design, including line plans, construction profiles, transverse construction, general arrangement, propeller shaft design, and electricity systems. The company's economic aspects were also feasible, with an NPV value of IDR 10,113,527,932, IRR 16%, a payback period of 1.49 years, an R/C ratio of 1.53, and a profitability index of 1.89. An effective business development strategy uses a vessel quadrant I strategy, namely by increasing production through optimal use of facilities and workforce. PT Jelajah Samudera Internasional has eight development strategies that can be implemented.

KONDISI OSEANOGRAFI DAN KESESUAIAN LOKASI BUDIDAYA LOBSTER DI PERAIRAN TELUK PIDADA, LAMPUNG

Mochamad Tri Hartanto — 2024-10-02

Oceanographic conditions and site selection are important factors in the success and sustainability of lobster culture using a floating net cage system. One of the obstacles to lobster cultivation is that there are no specific criteria yet regarding the suitability criteria for the aquaculture locations. This research aims to determine the requirements and appropriate locations for lobster aquaculture around Pidada Bay. The basic criteria used were the suitability of oceanographic conditions and seawater quality for the construction of floating net cages and the natural habitat of lobsters. Spatial analysis methods used a geographic information system, based on a weighted system to assess the suitability of oceanographic conditions for aquaculture, including transparency, turbidity, TSS, chlorophyll-a, dissolved oxygen, nitrate, phosphate, ammonia, pH, total organic matter, and salinity. The results showed that 9 of 15 criteria were classified as very suitable for lobster cultivation. The area suitability analysis study showed that 78.8% of the waters, or 2.890,8 ha, were categorized as suitable areas; only 21.2%, or 755.2 ha, are classified as suitable, and no unsuitable category was found in the waters of Pidada Bay. The majority of the bay area is suitable for lobster cultivation, some areas located quite far from land are unsuitable for cultivation activities due to high levels of nutrients runoff.

KAJIAN VALUASI JASA EKOSISTEM MANGROVE DESA CITEUREUP, KABUPATEN PANDEGLANG

Faradian Nurul Hapsari — 2024-10-04

The coastal and marine areas of Banten Bay are unique ecosystems that hold various potentials and problems in the utilization of natural resources as well as, the role of mangrove forests become important to mitigate and control the various problems identified in the coastal and marine areas of the Banten Province. This study aims to estimate how much economic value will be lost from contact activities within the coastal areas in the research location. This valuation could provide an overview of the current health of the ecosystem and become the basis for mangrove management in the future. The research method used was the economic valuation method to provide an overview of the current condition of ecosystem health and to become the basis for future mangrove management strategies in the Citeureup Village, Panimbang District, Pandeglang Regency, Banten Province. The analytical method used in this study included the economic valuation of mangrove forests, fisheries productivity, and the economic value of coastal lands. The results showed that the Total Economic Value (TEV) of the Citeureup Village was IDR 20,290,350,289 per year with a total study area of 3 ha of mangroves. The Citeureup Village community had utilized the mangrove forests for food sources, coastal protection, and support the recreation sector.

POLA MUSIM DAN KELAYAKAN USAHA PENANGKAPAN PANCING ULUR DI PELABUHAN PERIKANAN PANTAI PONDOKDADAP KABUPATEN MALANG

Mohammad Imron — 2024-10-10

Changes in fishing season patterns, main catches, and the increase in fishing boat can result in losses for handline fishermen. Therefore, an analysis of seasonal patterns and the feasibility of handline fishing operations is necessary. This research aims to analyze the seasonal fishing patterns and the feasibility of handline fishing. Primary data including investment values, operational costs, and income values, were collected from fishing vessels sized 10-19 GT and 20-29 GT, representing the predominant vessel sizes. Additionally, secondary data, such as handline fishing vessel logbook data, were obtained through literature studies. The results reveal six main catch species, with tuna being the most dominant. The peak season for tuna occurs from May to August, while skipjack tuna peaking in June and mackerel tuna in October. Handline fishing boats with the size of 10-19 GT and 20-29 GT yielded net profits of IDR 132,849,798.00 and IDR 211,122,924.00, respectively. The R/C ratio were 1.77 and 1.83, with payback periods of 2.35 and 2.85 years. The sales break-even point (BEP) were IDR 72,868,128.00 and IDR 98,133,162.00, corresponding to unit BEP values of 3,234 kg and 5,205 kg. The return of investment (ROI) was 43% for 10-19 GT vessels and 35% for the 20-29 GT vessels

PENAMBAHAN KANTONG DAN PENAJU: UPAYA MENINGKATKAN HASIL TANGKAPAN GOMBANG

Muhammad Natsir Kholis — 2024-10-10

A tidal trap (gombang) is a traditional fishing gear with construction weaknesses, including the absence of a trap cod-end and limited wings. The purpose of the research is to determine the differences in the composition of fish species and their weights caught under four different treatments, and demonstrate that the addition of a cod-end, leader net, and a combination of both will affect the weight composition of the tidal trap catch without reducing the diversity of species. The method used for this study was experimental fishing, conducted from May to August 2023in the waters of Prapat Tunggal Village, Bengkalis Regency, Riau Province. Fishing trials were carried out over 17 trips. The results show that both the control and treatment tidal trap caught the same 12 fish species: acetes shrimp (Acetes sp.), red shrimp (Solenocera depressa), tiger shrimp (Penaeus monodon), shorthead hairfin anchovy (Ilisha sp.), longjaw thryssa (Thryssa setiostris), rainbow sardine (Dussumieria acuta), serra spanish mackerel (Scomberomorus brasiliensis), wolf-herring (Chirocentrus sp.), croaker (Johnius trachycephalus), largehead hairtail (Trichiurus lepturus), bombay duck fish (Horpodon neherus), and cuttlefish (Sepia sp.). Differences in the treatments of tidal traps impacted the catch results. The cod-end and leader net tidal trap (P3) yielded the highest total weight at 1,710.82 kg (40.16%), followed by the cod-end tidal trap P1 at 1,158.90 kg (27.20%), the leader net tidal trap P2 at 824.27 kg (19.35%), and the control tidal trap P0 at 566.36 kg (13.29%).

PENGARUH PEMBERIAN PAKAN TAMBAHAN CACING SUTRA TERHADAP PERTUMBUHAN IKAN GABUS (Channa striata)

Cessi Wulandari — 2024-10-10

The snakehead (C. striata) is a freshwater fish species that inhabits swampy areas and rivers. It has high economic value, with its selling price determined per centimeter of its body length and is very useful in the medical and industrial sectors. Snakehead fish has good nutritional content, especially albumin. The growth of snakehead fryis largely determined by the quality of feed provided. This study aims to analyze the growth rate of snakehead fry by providing additional feed in the form of Tubifex sp. The experiment utilized four plastic aquariums measuring 40 x 30 x 30 cm, calipers, digital scales, a dissolved oxygen (DO) meter, a total dissolved solids (TDS) meter, and a pH meter. The materials used in the experiment included freshwater, fish pellets (PF 1000) produced by Prima Feed, snakehead fish, and silkworms. The research method used a Completely Randomized Design (CRD) with four treatments: P1 (100% pellets), P2 (75% pellets + 25% silkworms), P3 (50% pellets + 50% silkworms), and P4 (25% pellets + 75% silk worms). Results indicated that the addition of silkworms significantly affected in the growth in weight, length, and width of snakehead fry. The best growth was observed in treatment P4 (25% pellets + 75% silk worms), with an average absolute length of 24.31±9.89 mm, an average absolute width of 3.41±1.66 mm, and an average absolute weight of 18.28±6.40 g.

KOMPOSISI DAN PRODUKSI HASIL TANGKAPAN DI PELABUHAN PERIKANAN PANTAI LARANGAN, KABUPATEN TEGAL

Roza Yusfiandayani — 2024-10-10

The Larangan Coastal Fisheries Port is a center of capture fisheries activities in Tegal Regency, dominated by small-scale fishermen. The main fishing gear utilized in the Larangan fishery port includes mini purse seines and seine nets. Improper management of these fishing methods can lead to a decline in fish stocks and disruption of the marine ecosystem. Productivity calculations were carried out to determine the production capacity of fishing boats by comparing the number of production with the duration of fishing operations. This study aims to analyze the economic value derived from the number of catches, as well as the composition of the main catch and bycatch. The results of this study are expected to provide deeper insights into the operational efficiency of mini purse seine and seine net fishing gear. Based on the results of the study, there are five main species of catch: Commerson’s anchovies (Stolephorus commersonnii), Indian anchovies (Stolephorus indicus), fringescale sardinella (Sardinella fimbriata), mackerel (Rastrelliger sp.), and ponyfish (Leiognathidae). Additionally, seven bycatch species were identified: tank goby (Glossogobius giuris), Asiatic glassfish (Ambassis naula), rainbow sardine (Dussumieria acuta), squid (Loligo sp.), shrimp (Metapenaeus monoceros), wolf-herring (Chirocentrus dorab), and largehead hairtail (Trichiurus lepturus). The highest production value of catches landed at PPP Larangan occurred in 2022, with a value of IDR 19,665,602,500, while the lowest production value in 2019 was IDR 10,355,377,500.