Jurnal Sains dan Teknologi Perikanan

Study of Chlorella sp. Population Growth in The Laboratorium Scale

2025-10-25T01:15:23+00:00

Ketersediaan pakan alami dalam budidaya ikan ataupun udang menjadi tantangan, dimana bisa menjadi peluang untuk para pembudidaya agar dapat meningkatkan produksi perikanan budidaya. Pakan alami yang berkualitas tinggi sangat diperlukan untuk mendukung pertumbuhan larva ikan dan udang pada awal mula kehidupan. Pakan alami seperti Chlorella sp. dalam budidaya perikanan tidak bisa sepenuhnya bergantung pada alam sebagai sumber utama, melainkan diperlukan usaha pengkulturan untuk meningkatkan produksi Chlorella sp. sehingga para petambak dapat mengoptimalkan produktivitas budidaya mereka. Metode dalam penelitian ini terdiri dari persiapan bibit mikroalga, persiapan alat kultur, sterilisasi alat dan bahan, proses kultur, dan pemantauan setelah kultur dilakukan. Stoples ukuran 3 liter sebagai wadah kultur skala laboratorium. Kepadatan populasi mikroalga pada setiap sampel ditentukan dengan metode hitung langsung menggunakan haemocytometer dan mikroskop dengan perbesaran 10x. Beberapa faktor lingkungan dapat mempengaruhi pertumbuhan Chlorella sp. ini selama masa kultur seperti kualitas air dalam beberapa kondisi seperti kimia dan mediannya. Parameter fisik seperti suhu, intensitas cahaya, dan aerasi, serta parameter kimia seperti suhu, DO, pH, dan salinitas digunakan untuk mengevaluasi kualitas air. Penggunaan pakan alami sebagai tambahan nutrisi dapat meningkatkan kualitas hasil budidaya udang vaname.

The Effect of Adding Vaname Shrimp Shell Extract (Litopenaeus vannamei) to Wheat-Based Tekwan on Sensory Preference

2025-10-25T00:51:45+00:00

Wheat flour tekwan is tekwan made from wheat flour and tapioca.Its flavor is obtained by adding MSG and flavor enhancers. An alternative to adding flavor to wheat flour tekwan is to add shrimp shells, because shrimp shells contain chitin chitosan and glutamic acid from their constituent proteins. The purpose of this study was to examine the effect of adding vaname shrimp shells on wheat flour tekwan on its sensory preference levels, including color, aroma, taste, and texture, with treatments of 75 g, 100 g, and 125 g. The testing method used was a hedonic test with a Likert scale of 1-5 on 30 untrained panelists. Data were analyzed using ANOVA at a 5% confidence level and Duncan's multiple range test. Based on the test results at a 5% confidence level, it was found that the addition of shrimp shells did not affect the preference for color (F_count 1.91< F_table 3.15) and texture (F_count 0.52 < F_table3.15) of wheat flour tekwan at 75 g, 100 g, and 125 g; it affected aroma (F_count3.41 > F_table 3.15) and taste (F_count 3.65 > Ftable3.15) of wheat flour tekwan at 75 g, 100 g, and 125 g. The 125 g treatment was preferred over the others with an an average preference score of 3.97 (liked) for color; 3.93 (liked) for aroma; 4.2 (liked) for taste; and 3.97 (liked) for texture.

Ovulation Latency: A Case Study of Koi Fish (Cyprinus rubrofuscus) Spawning using Gonadotropin Hormones with Different Doses

2025-10-25T01:06:45+00:00

Spawning of koi fish (Cyprinus rubrofuscus) using gonadotropin hormone is a step in providing fish seeds. This study aims to determine the ovulation latency of C. rubrofuscus fish spawned using gonadotropin hormone with different doses on the resulting fecundity, fertilization rate, hatching rate and survival rate produced. The study was conducted using an ex post causal design method at a koi fish hatchery unit in the Sukabumi area. The experimental results were analyzed using ANOVA statistics to compare between treatments. The fastest ovulation latency and highest fecundity values were obtained at a dose of 0.5 ml/kg (sex ratio 1:1) which was 8.25 hours with a fecundity value of 120,000 eggs. While the highest FR value was obtained at a dose of 0.3 ml/kg (sex ratio 1:2) of 88%. The best HR value was obtained at a dose of 0.2 ml/kg (sex ratio 1:3) which was 80% with an SR value of 72%. The ovulation latency value was faster at a high dose so that it affected the fecundity value (p<0.05). However, the high fecundity number did not all represent the quality of the eggs produced, this can be seen in the lower FR value compared to the dose of 0.3 ml/kg (sex ratio 1:2). The results of the study showed that the FR and HR values were different due to different dose and sex ratio factors. The difference in sex ratio affects the hatching process which is caused by the uneven fertilization time of koi fish. In general, fecundity, fertilization rate, and hatching rate significantly influenced ovulation latency (p<0.05). The results of this study are expected to provide information regarding the use of gonadotropin doses in the spawning process, especially regarding ovulation latency and other spawning parameters.

Variability of Sound Speed Profile in the Banda Sea During West and East Monsoon

2025-10-25T01:38:31+00:00

Sound speed in the ocean is a key parameter for underwater acoustic applications, such as communication, navigation, and sonar systems. Sound speed is influenced by temperature, salinity, and pressure, making it highly sensitive to seasonal oceanographic dynamics. Although the Banda Sea is recognized as one of the strongest upwelling centers in Indonesia, studies specifically addressing the seasonal variability of sound speed profiles in this region remain limited. This study aims to analyze the differences in temperature, salinity, and sound speed characteristics between the west and east monsoon periods in the Banda Sea. Monthly temperature and salinity data for 2023 from the Copernicus Marine Environment Monitoring Service (CMEMS) with a spatial resolution of 0.083° × 0.083° were processed using Ocean Data View (ODV). Sound speed was analyzed in terms of its horizontal and vertical distributions at depths of 0, 150, and 300 m, as well as vertical profiles down to 500 m. During the west monsoon (January), surface temperature was higher (29.5–31 °C) and sound speed reached maximum values (1543–1546 m/s), with a deeper thermocline due to downwelling. In contrast, during the east monsoon (July), surface temperature was lower (26.5–28.5 °C), the halocline was shallower (34.7–35.2 PSU at 50–150 m), and surface sound speed decreased (1538–1541 m/s), reflecting seasonal upwelling. Minimum sound speed was consistently observed at 300–500 m (1496–1505 m/s). These findings highlight temperature as the dominant factor controlling sound speed, with important implications for the planning of underwater acoustic operations in eastern Indonesian waters.

Morphometric and Meristic Characteristics of Freckled Goatfish (Upeneus tragula) from Madura Strait, East Java

2025-10-25T01:51:13+00:00

The kuniran fish or goatfish, from genus Upeneus, is the most commonly found species in the world from the Mullidae family. This study aims to provide information regarding the morphological characteristics of Upeneus from the Madura Strait. The method used in this study is the survey method. This study was conducted in June 2023 in the Madura Strait (East Java, Indonesia). The parameters tested for the morphological identification of Upeneus fish are morphometric and meristic tests. Fish morphometric tests are quantitative measurements and analyses of the shape and size of fish body parts to identify fish species in terms of length or weight. Meanwhile, meristic tests are recording and analyzing the number of fish body structures that can be counted, such as the number of scales, fin rays, or certain bones. The results show that the kuniran fish/goatfish or Upeneus found in the Madura Strait was U. tragula which had the main morphometric characteristics of 17 cm SL, with a head length of 25.88, a head depth of 18.82, and a snout length of 5.88. This fish had two dorsal fins, one ventral fin, two pectoral fins, one anal fin, and a caudal fin. The ventral and anal fins were yellow, with a brownish-white caudal fin. In this study, U. tragula had meristic characteristics of VIII dorsal fin spines, 10 dorsal fin rays, 34 caudal fin rays, III + 6 anal fin rays, and 12 pectoral fin rays.

Catch Composition and Financial Feasibility of Senangin Gill Net Fishing Gear at the Fisheries Port UPT in Riau Province

2025-10-25T02:06:42+00:00

This study aims to analyze the catch composition and evaluate the financial feasibility of using senangin gill nets at the Fisheries Port Technical Implementation Unit (UPT) in Riau Province. Primary data were collected through direct observation and interviews with boat-owning fishermen, while secondary data were obtained from relevant institutions. The results indicated that senangin fish (Eleutheronema tetradactylum) was the main catch with the highest CPUE values during the 2020–2023 period. The by-catch included mullet (Mugil cephalus), pomfret (Pampus argenteus), and catfish (Arius thalassinus). The financial feasibility analysis showed that the fishing operation is viable, with a positive Net Present Value (NPV), an Internal Rate of Return (IRR) exceeding the discount rate, a Payback Period (PP) of less than five years, and a Benefit-Cost Ratio (BCR) greater than one. Therefore, the use of senangin nets is considered ecologically sustainable and economically beneficial for local fishermen.

The Potential Of Honeycomb Bait in Increasing Catches Results Of Umbrella Fish Traps in Teluk Merbau Village

2025-10-25T02:34:28+00:00

Teluk Merbau Village is a village that is included in small scale fisheries by fishing using umbrella fish traps. The potential catches in umbrella fish traps gear in Teluk Merbau Village is not optimal. Based on this, this study was conducted with the aim of identifying the potential influence of honeycomb bait on the catches of umbrella fish traps in Teluk Merbau Village. In this study, a comparative descriptive analysis method was used by calculating the composition of the main catch and discard catch on 6 umbrella fish traps using honeycomb bait and without bait. The results of this study show that there is a difference in the number of catches between honeycomb bait and no bait with a catch of 5,5 kg with bait and 3 kg without bait. The catch showed that honeycomb bait had the potential to increase the proportion of the main catch by 18% with a percentage of 91% with bait compared to no bait by 73%. The main catch obtained consisted of jerbung shrimp (Penaeus merguiensis) and rock shrimp (Metapenaeus ensis). These findings provide an indication that honeycomb bait can be an alternative bait that supports the optimization of fishermen's catches.

Characteristic of Physical and Chemical in Randusanga Kulon Waters, Brebes for Suitability of Green Mussel (Perna viridis) Cultivation

2025-10-25T08:31:13+00:00

Randusanga Kulon waters as a habitat of green mussels had potential as a cultivation area. The prospect of the economy of green mussels cultivation is high due to rapid growth, available annually, and can tolerate the environmental changes. This study was aimed to identify the water quality in Randusanga Kulon waters for green mussel cultivation, there are physical and chemical characteristics such as temperature, turbidity, water clarity, TSS, TDS, and salinity, pH, DO, ammonia. The sampling was conducted on December 2024 using purposive sampling method by setting up 3 stations based on distance, the results are compared with quality standard of PP No. 22 2021. The result of physical characteristic, average temperature at three station is 31°C, turbidity range between 4-27 NTU, water clarity range between 15-50 cm, TSS range between 72-93 mg/L, TDS range between 204-304 mg/L. The results of chemical characteristic, average salinity at three station is 25 ‰, average pH is 7, DO range between 4-5 mg/L, ammonia range between 0.092-0.199 mg/L. The results showed some of parameters were exceed the quality standard of PP No. 22 2021 therefore the conditions of Randusanga Kulon waters still suitability for green mussel cultivation.

Scientific Review: Utilization of Market Segmentation in Fish Brain Marketing

2025-10-25T10:00:08+00:00

This study aims to review various studies discussing market segmentation strategies for processed fish cakes in Indonesia. The method used is a qualitative descriptive literature study. A total of five relevant scientific journals were analyzed to review the application of market segmentation in the marketing of fish otak-otak in various regions in Indonesia, covering both urban and rural areas, as well as the upper-middle and lower-middle economic market segments. The results of the review show that geographic and demographic segmentation are the most dominant approaches used, both explicitly and implicitly, in identifying consumer groups, while psychographic and behavioral approaches are still limited. The main conclusion of this review is that the success of fish brain marketing is highly dependent on understanding the local market and specific demographics, followed by innovative product adaptation and promotion to meet the preferences and purchasing behavior of modern consumers. These findings can be the basis for MSMEs to design marketing strategies that are adaptive to local market characteristics and adaptive to changes in modern consumer behavior trends.