Jurnal Teknologi Perikanan dan Kelautan

BIOMETRIC CHARACTERISTICS AND STRESS LEVELS OF GLASS EEL (Anguilla sp.) IN THE SOUTHERN ESTUARIES OF SUKABUMI, WEST JAVA

2025-02-04T15:06:46+07:00

Palabuhanratu Bay is the terminating flow for some rivers, i.e. the Cimandiri River, Ciletuh River, Cikaso River, and Cibuni River, where the estuary is the entry route for glass eels (Anguilla spp.) or fish seeds from sea waters to these estuaries. Different rivers have different water quality conditions that may imply differences in the quality and quantity of eels entering the estuary. This research aims to determine locations with superior seeds, and seeds with low quality based on studying biometric characteristics and stress levels of eel seeds in several estuaries in the south of Sukabumi, West Java. The information gathered is subject to determining the highly recommended use of glass eels as seeds in eel aquaculture, as well as determining the area where habitat rehabilitation and conservation. The research was carried out in four locations, namely the Cimandiri, Ciletuh, Cibuni, and Cikaso River Estuaries, from December 2021 to January 2022, the peak time for eel seed migration. The parameters observed include water physics and chemistry, biometrics, and blood glucose. The research results show that each location has different physical and chemical water parameter values but has relatively the same stress level. The best biometric value of eel fish seeds was found in eel seeds originating from the Cimandiri River, while the lowest one was at the mouth of the Cibuni River. Therefore, eels that are suitable for cultivation activities come from the Cimandiri River Estuary, while the eel location that needs conservation is the Cibuni River Estuary.

DETERMINING GROSS TONNAGE OF PURSE SEINERS USING A PHYSICAL MODELING APPROACH IN TEGAL, CENTRAL JAVA

2025-02-04T15:10:13+07:00

The research was carried out at the dock and shipping companies, PT. Indonesian Fisheries, PT. Tiara, and village cooperative unit (KUD) Karya Mina, at Tegal, Central Java, in October 2023. The research aims to determine the percentage change in shape of the ship’s hull below deck, Cb (coefficient block) and GT (gross tonnage) values of purse seiners in the Tegal using a physical model that is dipped in water. The Cb and GT values research was focused on KM. Himalaya SB with 84.44% accuracy. The results at the three dock and shipping companies showed that the change in the shape of the ship’s hull below deck, on average, in part I, II, III, IV, and V were 14%, 20%, 30%, 11%, and 25%, respectively, and in the case of KM. Himalaya SB part I, II, III, IV, and V were 15%, 18%, 29%, 9%, and 29%, respectively. The shape was dominated by shapes III and V. The ones that increase Cb and GT values were shape III with a U shape. The results of the average percentage change in shape for 6 ships, including the case example purse seiner, have a pattern that tends to be the same. The Cb value obtained from the experimental results was 0.82 > 0.70 from the "f" factor coefficient according to Minister of Transportation Regulation Number 8 of 2013. Based on the GT calculation, it was obtained that the value increased by 17% when compared to the regulation.

DOMAIN ASSESSMENT OF BALI SARDINELLA RESOURCES THROUGH ECOSYSTEM APPROACH AT ARCHIPELAGO FISHING PORT (PPN) PENGAMBENGAN

2025-02-05T19:39:13+07:00

Bali sardinella is a fish species that contributes greatly to the Archipelago Fishing Port (PPN) Pengambengan. The potential of Bali sardinella fishery resources is abundant and of high economic value. The purpose of this study was to assess the performance of fish resource domain status with an ecosystem approach. The research was conducted for seven months from January to July 2023. Data collection was done through observation and interviews. The data analysis used was a multi-criteria analysis approach with assessment and visualization of the composite index with a flag model. Six indicators in the fish resources (SDI) domain were studied, namely standardized CPUE trends, Bali sardinella size, proportion of juveniles caught, species composition of the catch, range collapse of fish resources, and endangered, threatened, and protected species (ETP). Indicators in the fish resources domain indicate that the trend of standardized CPUE is decreasing, the trend of Bali sardinella size is relatively fixed, the proportion of juveniles caught is 53%, the species composition of the catch is a higher proportion of target fish, the range collapse of fish resources for fishing grounds is relatively fixed depending on the target species, and for ETP species caught but released. The final result of the assessment of the status of Bali sardinella fish resources based at PPN Pengambengan received a composite score of 70, so it is in a good category.

ESTIMATION OF THE FIRST MATURITY SIZE OF SILVER BARB (Barbonymus gonionotus) IN SIDENRENG LAKE, SOUTH SULAWESI

2025-02-07T14:04:20+07:00

Silver barb is a popular introduced species in Sidenreng Lake, South Sulawesi. Its presence has been highly beneficial for local fishers due to its significant economic value. Fishers make this fish their primary target for fishing. The fishing activity for the silver barb was carried out year-round using gill nets with various mesh sizes, ranging from small to large (1.5”, 2”, 2.5”, 3”, and 3.5”). These activities have led to a decline in the fish population in the Lake. Therefore, information related to the fisheries biology of the fish is crucial. This study aims to determine the length at first capture (Lc), length at first maturity (Lm), and the appropriate gill net mesh size for catching suitable silver barb. The sample data were analyzed using descriptive and comparative statistical tests. The study results showed that the size at capture for the silver barb in the Sidenreng Lake was Lc = 132.66 mm. Male and female fish reach their first length of maturity at fork lengths (FL) of 173.08 mm and 140.95 mm, respectively. The recommended gill net mesh size for catching suitable silver barb was 3”, as the average FL caught was larger than the Lm value.

THE EFFECT OF AUTOMATIC FISH FEEDING TECHNOLOGY ON THE QUALITY OF TILAPIA FISH CULTURE PRODUCTS

2025-02-10T10:15:07+07:00

Fish culture has an important role in achieving food security in Indonesia. Tilapia is one of the fish that can be obtained through aquaculture activities. Several factors influence the growth of tilapia, such as water quality, feeding process, and quality of the feed provided. Too little feed can cause tilapia to experience slow growth, while too much feed can cause poor water quality because food is not eaten or eaten too late. The objective of this study is to analyze the use of an automatic feeder compared to conventional methods. The results can be a viable option for specific fish culture practices to achieve optimal yields. The results of the application of technology show that the feed conversion ratio reached 97.6%, the survival rate reached 94.4%, and the specific growth rate reached 3.58%. This is better compared to several other treatments in fish culture, so it can result in faster harvest results with efficient use of feed and maximum harvest quantity.

WAGE PATTERN AND COMPOSITION OF PURSE SEINE SHIP CREW: CASE STUDY OF KM. SUMBER MAJU

2025-02-11T12:39:52+07:00

The purse seine used in Batam City is a type of waring, known as a purse seine waring. Each crew member's income has a different share depending on the amount of catch and the position level on the ship. Calculation of the profit-sharing system for purse seine waring fishermen in Batam is determined by the company. The purpose of this study is to calculate the income results during 3 trips, determine the wage pattern, and analyze the composition of wages for crew and purse seine crew based on the amount of catch per trip. The study was conducted from February to May 2022. The method used was observation and interviews over 3 trips. Data analysis used descriptive analysis. The research results showed that during the 3 trips, the catch was 74 tons, amounting to 138,674,300 IDR. Fishermen's income was adjusted to their organizational position on the ship. The captain got 3 parts; the engine room chief (ERC) was 2.5 parts; the assistant ship's mate, the mate, the boatman, and the ERC I deputy were 2 parts, respectively; the bowman, the deputy canoe master, the Stoneman, the ERC II deputy, and the chef were 1.5 parts, respectively; and the crew member was 1 part. The crew's income sources were divided into 6 types, namely basic wages 1, 2, and 3; fixed allowances; and non-fixed allowances 1 and 2. Each fisherman gets income based on his position on the ship.

DEVELOPMENT STRATEGY OF SEAWEED (Kappaphycus alvarezii) CULTIVATION BUSINESS IN THE WATERS OF PANTAI AMAL OF TARAKAN CITY

2025-02-14T14:53:25+07:00

Kappaphycus alvarezii seaweed is one of the fishery commodities developed in Tarakan City, especially in the water of Pantai Amal, Tarakan City, since 2009, with fluctuating production. This research aims to analyze the financial feasibility of the seaweed cultivation based on internal and external factors and to develop appropriate strategies to increase seaweed production in the Tarakan City. Sampling technique was conducted purposively with a qualitative approach using a questionnaire. The SWOT (strengths, weaknesses, opportunities, and threats) and QSP (quantitative strategic planning) analysis results show five internal strengths and five weaknesses with an IFE (internal factor evaluation) value of 2.57, as well as four threats and five external opportunities with an EFE (external factor evaluation) value of 2.86. Based on the IE (internal-external) matrix, the business is in the growth phase (cell V), so the right strategy is to develop the K. alvarezii seaweed cultivation business using the longline method in Tarakan City through empowering members and groups to increase business (with a score of 5.83), expanding cultivation land (score 5.65), and improving technical cultivation skills to increase product quality and quantity (score 5.52).

ANALYSIS OF RESISTANCE AND STABILITY IN THE MODIFICATION OF OUTRIGGED FISHING BOAT DESIGN IN THE PUGER WATER, JEMBER

2025-02-16T07:58:07+07:00

Fishing boats are one of the essential means of transportation for fishers. In Puger, fishing boats are crafted by traditional boat builders who have passed down their skills through generations. However, the effectiveness of the bow stem design of these fishing boats remains unknown. This research aims to analyze the impact of the bow stem shape on the resistance and stability values of the boat. This research utilized an outrigger fishing boat design with the following dimensions: a length overall (LOA) of 11 m, a beam (B) of 1.5 m, a height (H) of 1.5 m, and a draft (T) of 0.5 m. We compared the boat's original design and its modified bow design. The results of this study indicate that the modified design has a 16.327% lower resistance. Regarding stability, the modified design shows a 12.7% greater GZ (upholding arm value) and a 2.1% smaller heel compared to the initial design. Additionally, the modified design has a rolling period that is 5.8% faster than the original design. The modified design has better resistance and stability than the initial design.

GLUCOSE AND CORTISOL VARIATIONS: PRELIMINARY STUDY ON PHYSIOLOGICAL RESPONSE OF MUD CRAB AFTER TRANSPORTATION ACTIVITY

2025-02-19T14:26:21+07:00

The system of transporting mud crabs (Scylla spp.), carried out by the community by placing them in styrofoam boxes, was suspected of triggering stress in the biota. This study aims to determine the glucose and cortisol variation values of mud crabs as physiological response of the biota after transportation activity. Analysis was carried out on 2 groups of mud crab populations (I, II). Each population was observed 3 times, the crab had just arrived from the field (H₀), had been cultivated for 5 days (H₅), and had been cultivated for 10 days (H₁₀) in a plastic box (30x25x20 cm³) in cement pond (180x180x75 cm³) filled with seawater (25 PSU). Crabs were fed with fish pieces twice per day. In population I, the average glucose and cortisol values of H₀ ranged 78.3±30.5 mg/100 ml and 0.5±0.1 ng/dL, H₅ ranged 42.7±4.9 mg/100 ml and 1.0±0.3 ng/dL, and H₁₀ ranged 47.0±8.5 mg/100 ml and 0.6±0.2 ng/dL, respectively. In population II, H₁ ranged 60.4±37.4 mg/100 ml and 0.5±0.2 ng/dL, H₅ ranged 44.2±3.6 mg/100 ml and 0.9±0.3 ng/dL, and H₁₀ ranged 75.2±19.7 mg/100 ml (glucose). Based on these observations, the glucose values in the two mud crab populations varied (3.6-37.4 mg/100 ml), and according to the ANOVA test, they are insignificantly different (p>0.05). However, there is a downward trend from H₀ to H₅.

STATUS OF FACILITIES AND INFRASTRUCTURES AVAILABILITY OF THE CAPTURE FISHERIES AREA IN WEST SUMATRA

2025-02-21T19:53:29+07:00

The great potential of fishery resources in the Indian Ocean can be optimally utilized by the community of West Sumatra if adequate fishery infrastructure is available. The development of this infrastructure should ideally synergize with the outputs and outcomes of previous coastal area development programs in West Sumatra. One initial step to create this synergy is to analyze the conditions of the capture fisheries and the available infrastructure in the coastal areas, namely fisheries facilities and infrastructures, as well as the capture fisheries area development programs. This research utilized data and information obtained from field observations, interviews, focus group discussions (FGDs), questionnaire surveys, and secondary data from government agencies. The readiness of the area was assessed by the index of infrastructure availability relative to the infrastructure needs for the planned targets. The analysis concludes that the availability of fisheries facilities and infrastructures had a moderate category status, respectively 63% and 72%. Among several types of facilities, some still need to be constructed, such as clean water supply and ice factories to maintain the quality of fish.