DEPIK Jurnal Ilmu-Ilmu Perairan, Pesisir dan Perikanan
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Characteristics of the edible film made from Kappaphycus alvarezii of Sumenep seawaters, Madura
Full text linkEdible film is a primary packaging in the form of a thin layer that covers food products, and it is usually made from hydrocolloids, lipids, and mixtures of both. Edible film from seaweed carrageenan (Kappaphycus alvarezii) extracts may serve as an alternative to plastic packaging, which is environmentally friendly and safe for consumption. This research aims to analyze the proximate composition ofKappaphycus alvareziisamples (lab-scale drying and conventional drying) and investigate its effects on physical characteristics (thickness values, solubility in water, water vapor transmission rate, elongation,and tensile strength) of the edible film. The research was carried out in several stages: sampling, sample preparation, carrageenan extraction, and edible filmmaking. The research was carried out using a completely randomized design with five treatments, namely the addition of 1%, 2%, 3%, 4%, and 5% (w/v) carrageenan extract. The research results showed significant differences in proximate values(water, ash, fat, fiber, and carbohydrates) between seaweed dried by farmers and seaweed dried in the laboratory. The addition of carrageenan extract significantly affected the edible film's thickness, water solubility, and tensile strength. The best characteristics were obtained at a concentration of 2% carrageenan extract, resulting in a thickness of 0.12 mm, solubility in water of 60.43%, water vapor transmission rate of 5.77 g/cm2/hour, elongation of 251.33%, and tensile strength of2.42 Mpa.The results of this research are essential for the development of packaging technology in the future
Current Patterns and Distribution of Suspended Solids on the Sea Coast
Full text linkThe ocean faces a variety of environmental challenges, including pollution, overfishing, habitat destruction, and climate change. These threats can have significant impacts on marine ecosystems and the livelihoods of coastal communities. The sea is also affected by currents, which are the continuous and directional movement of seawater. A number of variables, including wind, temperature, salinity, and the earth's rotation, influence ocean currents. Ocean current patterns are complex and can vary greatly depending on the region and time of year. Ocean current patterns can significantly impact the distribution and movement of suspended solids in the ocean. High levels of suspended solids can reduce water clarity, making water appear cloudy. The value of the concentration of suspended solids in a body of water greatly affects how high its turbidity is. Hydrodynamic models are used to study the movement of water and sediment in estuaries and coastal areas, including tidal, wave, and current effects. Understanding the movement of suspended solids in the ocean is important because it can help predict the spread of pollutants, determine sediment transport patterns, and understand the impact of suspended solids on marine ecosystems
Bioactive profile and anti-UV activities of ethyl acetate extract of Rhizophora apiculata leaves
Full text linkMangroves plants such as Rhizophora apiculata are known to possess a diverse array of bioactive compounds with antioxidant and photoprotective properties. This study aimed to evaluate the anti-UV activity and bioactive composition of the ethyl acetate extract of R. apiculata leaves. The extraction was performed using the maceration method over 3 24 hours with ethyl acetate as the solvent. UV absorption was assessed using UV-Visible spectrophotometry, while compound identification was carried out through Gas ChromatographyMass Spectrometry (GC-MS). The extract exhibited significant UV absorption in the 290320 nm range, with Sun Protection Factor (SPF) values ranging from 2.5300.03 (low protection) to 37.0800.47 (high protection), indicating strong potential as a natural sunscreen agent. GC-MS analysis revealed several bioactive constituents, including lupeol, friedelan-3-one, cyclohexane-1,3,5-triphenyl, -tocopherol, and 1,3,5,7-cyclooctatetraenecompounds recognized for their UV-absorbing and antioxidant activities. The synergistic action of these phytochemicals is believed to contribute to the extracts overall photoprotective efficacy.Keywords:Rhizophora apiculataBioactive compoundsAnti-UVExtractEthyl Acetat
Productivity of trap catches in different fishing ground at Lhok Kuala Daya, Aceh Jaya
No full textoai:jurnal.usk.ac.id:article/50266Trap fishing gear offers several advantages, including high selectivity, the ability to keep fish alive, and support for sustainable fisheries. The productivity of catches around coral reefs and fish aggregating devices (FADs) is important to study in order to evaluate fish diversity in deeper waters across biological, genetic, species, and ecological levels. Such assessments are crucial for environmental conservation and for management based on diversity and dominance indices. This study aimed to determine the productivity, diversity, and dominant species composition of trap catches in two fishing grounds (FGs): coral reef areas and FAD zones at Lhok Kuala Daya, Aceh Jaya. The research employed an experimental fishing method, conducting five fishing operations in each zone. The overall diversity index of trap catches in Lhok Kuala Daya was 1.26, indicating a moderate level of diversity. The diversity index for catches around coral reefs was 1.15, while around FADs it was 1.58. The overall dominance index value of trap catches was 2.74, with dominance values of 0.74 in coral reef areas and 2.00 in FAD zones. These results indicate a low level of species dominance and a moderately diverse fish community in both fishing zones.Keywords:ProductivityTrapcatchFishing groundKuala day
Small island seagrass ecosystem management based on ecosystem approach fisheries management principles
Full text linkHealthy seagrass beds have high ecological value, characterized by high diversity and even distribution in the water. However, currently, the health condition of seagrass beds is threatened both naturally and by human activities. For example, the loss of seagrass meadows due to human activities in coastal areas, including on Maitara Island, North Maluku Province, Indonesia. The objective of this research is to identify the community structure of seagrass, and the proper management options to minimize negative impacts on damage to the seagrass meadow ecosystem and sustain seagrass resources. The study was conducted in the South Maitara and the North Maitara, during the dry season from September to October 2020 using vertical transect methods. The result shows that the average index of diversity, evenness, and dominance on Maitara Island of 1.0970, 0.6470, and 0.5892, respectively. The beaches of South Maitara and North Maitara have poor diversity, a good category for evenness, and a stable community. Enhalus acoroides has the highest density of 294 ind/m2, followed by Thalassia hemprichii around 287 ind/m2. Based on the ecosystem aproach fisheries management (EAFM) analysis, to effectively manage seagrass ecosystems in Maitara Island, a social development strategy is needed through community awareness, counseling, and capacity building in the management and utilization of seagrass ecosystems in Maitara Island to effectively manage the seagrass ecosystem in Maitara Island, a social development strategy is needed through public awareness, counseling, and capacity building in the management and utilization of the seagrass ecosystem in Maitara Island.Keywords:Seagrasscommunity structurediversitydensityevennessMaitara Islan
Ecosystem approach to coral fish management domain fishing techniques at PPI Ie Meulee, Sabang City
Full text linkThe study was conducted froam June to July 2024 located in PPI Ie Meulee, Sukajaya District, Sabang city, Aceh Province. The data collection methods include primary data (interviews and questionnaire) and secondary data (from relavant institutions and references). The sampling was done using the purposive sampling method with 21 respondents. Data analysis used was ordinal-based on liker 1,2,3 to each indicator, such as destructive or illegal fishing methods, modifications to fishing gear and auxiliary equipment, fishing capacity and effort, catch selectivity, the compliance of the function and size of fishing vessels with legal documents, and the certification of fishing crew members according to regulations. The overall average indicator score are 3. The results of the study showed that the fishing technique domain was categorized as good, with a composite value of 75.00.Keywords:EAFMFishing TechnuquesKota Saban
Characteristics of tuna fisheries in the Indian Ocean, especially in Quota Based Fishing in the Zone 04 (IFMA 572 and 573)
Full text linkIndonesia is one of the worlds leading tuna-producing countries. Under the Quota Based Fishing (Penangkapan Ikan Terukur/PIT), its Exclusive Economic Zone (ZEEI) in the Indian Ocean is designated as zone 04 of PIT. This research aims to analyzing the characteristics of tuna fisheries in the zone 04 (Indonesian Fisheries Management Area/IFMA 572 and 573), including tuna production by fishing gear and by port landing, species composition by gear, Landing per Unit Efforts (LPUE) by gear and by tuna species. The most dominant fishing gear for tuna is lines (hand lines, troll lines, kite lines, and rod handlines). Purse seines and longlines also caught a lot of tuna, but their percentages were still lower. The dominant tuna species caught was yellowfin tuna, which came from all types of fishing gear. The average LPUE in 2024 for gillnets was 28.6 kg/days, lines 56 kg/days, purse seine 161 kg/days, longline 58.5 kg/days, and pole and line 268 kg/trip/day. The abundance of ALB was highest in July, but the trend has been increasing since March and began to decline in last year. Pole and line and purse seine were the most productive fishing gear for catching tuna. The abundance of YFT varied greatly with high abundance in March, July, and October. The abundance of BET was high in February, July, and September. SBT is highly abundant in March, April, and July, with some months being empty. Benoa Public Port is recorded as the port with the highest production within Zone 04.Keywords:Tuna fisheriesIndian OceanTuna ProductionComposition speciesLPUEFishing Quota
Microplastics contamination of sea surface water in Banda Aceh City and Aceh Besar District, Aceh Province, Indonesia
Full text linkPlastic debris is one of the serious problems in urban cities, including Banda Aceh city and Aceh Besar district, Indonesia. This waste is degraded into a small particle called microplastics. This waste has the potential to pollute the waters in the coastal area. The objective of the present study was to analyse the microplastic contamination of the sea surface waters of Banda Aceh City and Aceh Besar District. Sea surface water was sampled from three locations, namely Gampong Jawa (Station 1), Alue Naga (Station 2), and Krueng Raya (Station 3) during January to March 2024. The results showed that there were four forms of microplastics found in the sea surface water sample, namely fragments, fibers, films, and pellets with nine colours, namely black, brown, blue, clear, red, yellow, green, pink, and purple. The fragments and black are the dominant form and colour of microplastic in the sea surface water of Banda Aceh city. The highest number of microplastic particles was found in Alue Naga waters (21.04 particles/L) and the least in Gampong Jawa waters (16.6 particles/L). Therefore, it is concluded that the surface of the seawater studied in this study has been contaminated with microplastics.Keywords: Microplastics Sea surface water Plastic waste Banda Aceh City Aceh Besar Distric
Acoustic target strength measurement of striped goatfish (Upeneus vittatus)
Full text linkThe Striped Goatfish (Upeneus vittatus) is a demersal species of significant ecological and economic value, particularly for small-scale fisheries in Aceh Province. Accurate biomass estimation and species identification in hydroacoustic surveys rely heavily on precise target strength (TS) reference values. This study aimed to establish reference TS values for U. vittatus by examining the relationship between TS and fish morphology. Specimens collected from northern Aceh waters were measured for total length (TL: 17.328.3 cm) and weight (W, g). TS measurements were conducted using a single-beam echosounder (Simrad EK15) operating at 200 kHz with a pulse duration of 0.16 ms in a controlled water-tank environment. This approach enabled the assessment of TS variability across specimens with different TLs. A robust relationship between TL and weight revealed positive allometric growth (b = 3.2932, R = 0.94) in the study. Furthermore, TS analysis demonstrated a logarithmic increase with TL (R = 0.6459), in alignment with theoretical predictions. These findings contribute to more accurate biomass estimation and support sustainable management strategies for U. vittatus populations in northern Aceh, Indonesia. Future research should encompass a broader range of fish sizes and incorporate additional biological variables to refine TS prediction models further.Keywords:GoatfishAcehLWRTSMullida
The effect of differences in silvofishery pond types and gender on the growth performance of mud crabs (Scylla serrata)
Full text linkMangrove crabs are one of the important fisheries commodities in Indonesia which have made a significant contribution to the lives of coastal communities. This study aims to analyze differences in growth performance of mud crabs reared in different silvofishery ponds to find out the effect of gender and to determine the interaction patterns between silvofishery pond type and gender. This research method uses a Factorial Randomized Block Design (FRBD) which consists of two factors, namely pond type (core pond, trench pond) and sex (male, female) so that it has 6 treatment combinations and 3 replications for each treatment. The initial weight of the test mud crab was 70-75 g. Test animals were kept for 56 days in crab baskets. The results showed that the interaction between pond type and sex had a significant influence on daily growth rate and absolute weight growth but did not significantly influence the feed conversion ratio and feed utilization efficiency. Duncan's further tests showed that the type of pond had a real influence on the feed conversion ratio and feed utilization efficiency. The best Feed Conversion Ratio was found in the core pond treatment with 3.80 1.05 with the highest feed utilization efficiency of 27.67 3.23 %.The survival rate shows values that are not significantly different between all treatments (86.67 100%.). The water quality measurement values during the research were still optimal for the growth of male and female mud crabs. Treatment of core ponds with female crabs (T2K2) showed the best performance in terms of daily growth rate and absolute weight growth of mud crabs. Core pond treatment with female crabs showed the highest daily growth results of 0.82% 0.01% and absolute growth of 42.00 1.00.Keywords:Mud crabSilvofisheryCore PondDitch PondGenderGrowt