Portal Jurnal Ilmiah Sekolah Tinggi Ilmu Pertanian (STIP) Wuna Raha
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Marketing analysis of jerbung shrimp (Fenneropenaeus merguiensis) in Pengujan Village, Bintan Regency
No full textPengujan Village is one of the villages in Bintan Regency where the majority of the population works as shrimp fishermen. Fishermen sell their catch directly to end consumers, but they sell much more to large traders because they are dependent on them. The difference in selling prices between fishermen and marketing agencies makes the marketing chain long. The study aims to calculate the marketing margin, fisherman's share, and marketing efficiency of jerbung shrimp in Pengujan Village. The research was conducted in January-February 2025 in Pengujan Village, Teluk Bintan Subdistrict, Bintan Regency. The study used a quantitative method, collecting data through observation, questionnaires, and documentation. The results showed there are five marketing channels, where channels I and II have a marketing margin of Rp0, while channels III, IV, and V have a marketing margin ranging from Rp46,000 to Rp46,667 per kilogram of shrimp. The fisherman's share in marketing channels I and II is 100%, while the fisherman's share in marketing channels III, IV, and V ranges from 64% to 65%. Thus, the fisherman's share in all marketing channels is considered efficient. The marketing efficiency of channels I and II is considered efficient because the percentage ranges from 3% to 4%, while the marketing efficiency of channels III, IV, and V is considered inefficient because the marketing efficiency value ranges from 7% to 17%
Characteristics of coastal ecosystems in Tering Bay, Batam: Analysis of mangroves, seagrass, and coral reefs
No full textTering Bay in Batam City is a coastal area with potential ecological changes if reclamation activities are carried out. This study aims to describe the baseline condition of the aquatic ecosystem by identifying the distribution of mangrove, seagrass, and coral reef species and analysing ecosystem conditions based on density, coverage, and damage levels. A mixed-method approach was applied using purposive sampling at seven mangrove stations, six seagrass stations, and seven coral reef stations. Mangrove data were collected using quadrat and line transect methods, seagrass through 100-meter quadrat transects, and coral reefs using the Line Intercept Transect (LIT) method. Results showed mangrove density ranged from 700 to 2,600 trees per hectare, dominated by Rhizophora apiculata. Seagrass coverage varied between 23.49% and 69.32% (categorized as sparse to dense), dominated by Enhalus acoroides and Halophila major, while absent at two stations. Coral reef cover was generally poor (0–8.2%), except for two stations categorized as moderate (23.9–28.5%). Overall, these baseline findings indicate heterogeneous coastal ecosystems influenced by anthropogenic pressures, particularly shipping and sedimentation. This fundamental information is expected to serve as a reference for sustainable coastal ecosystem management, especially in anticipating additional pressures from future reclamation activities
Water quality of seaweed growth (Eucheuma cottonii) in Sampolawa Bay, South Buton Regency
No full textSampolawa Bay, located in South Buton Regency, is a coastal area utilized for various seaweed cultivation activities. Seaweed has become a livelihood that is much sought after by coastal communities. The purpose of this study was to determine the water quality at the Eucheuma cottonii seaweed cultivation location in Sampolawa Bay, South Buton Regency. This study was conducted for 45 days from February to April 2025. Located in the waters of Sampolawa Bay, South Buton Regency, Southeast Sulawesi Province. The determination of the research location in this study was based on the distance from the river mouth and the characteristics of the aquatic environment around the location, namely station I is ±500 m from the river mouth, station II ±1000 m and station III ±1500 m. Water quality sampling was carried out every morning and evening and for the growth of Eucheuma cottonii seaweed was carried out every 15 days. The main data are water quality parameters including physical factors, chemical factors, and supporting data, namely absolute growth and seaweed production. The data obtained will be analysed descriptively quantitatively. Based on the results of the study, it shows that physical factors including temperature, brightness, and current speed are within a reasonable range. Chemical factors including salinity, dissolved oxygen, pH, nitrate and phosphate are within a reasonable range. The highest average absolute growth of Eucheuma cottonii seaweed was at station I, which was 195.14 g, followed by station II 130.33 g and station III 88.83 g. The highest total production of Eucheuma cottonii seaweed was at station I, which was 4,726.83 g/m2, followed by station II 3,243.48 g/m2, and station III 2,233.25 g/m2
Microplastic characteristics of seagrass leaves (Enhalus acoroides) in Malang Rapat and Berakit Waters, Bintan Regency
No full textThe seagrass ecosystem is a shallow marine plant ecosystem with high biological productivity but is now threatened by human activities, especially the disposal of plastic waste into the sea, which degrades into microplastics measuring 0.3 –> 5 mm. This study aimed to identify the characteristics and measure the abundance of microplastics in the leaves of Enhalus acoroides in the waters of Malang Rapat and Berakit, Bintan Regency. The research was conducted in March–April using the purposive sampling method, with samples collected during the lowest tide using a 50×50 cm quadrat transect. Microplastic identification was carried out by scraping the surface of seagrass leaves, followed by processing with H₂O₂, Fe₂SO₄, and NaCl solutions, and observing the samples under a microscope to determine the type, color, and quantity of microplastics. The results showed three types of microplastics, namely fiber, fragment, and film, with the highest abundance found at the Berakit location at the 100-meter point of 9.07 particles/cm², dominated by the fragment type (5.67 particles/cm²). The identified colors were brown, transparent, black, red, blue, and green, with transparent being the most dominant (19.81 particles/cm²)
Empowering coastal women in improving family economy in Margasari
No full textThis study aims to see the empowerment efforts of coastal women in improving the family economy in Margasari Village, Labuhan Maringgai District, East Lampung Regency. This study used a qualitative research type with an ethnographic approach. The focus of the study was on four Poklahsar in Margasari Village. Data collection techniques were carried out through observation, interviews, and documentation studies. Then, qualitative data analysis was carried out with the stages of data reduction, data presentation, and data collection. The results of the study are that the empowerment of coastal women in Margasari Village through Poklahsar is carried out by providing various training, workshops, mentoring and assistance, both capital and production support facilities. Although the empowerment carried out has been quite massive, the impact of increasing income for families is still not significant because the marketing of processed food products produced by Poklahsar has not been optimal
Density and regeneration of mangrove ecosystems in open and natural areas in the waters of Kampung Batu Licin, East Bintan
No full textMangroves are vegetation communities that generally grow along the coastline and provide many functions ranging from ecological functions as habitats and economic functions as areas of utilization for humans. In the waters of Batu Licin Village there is an open mangrove area after bauxite mining, therefore it is necessary to conduct research on the level of density and mangrove regeneration seen from the presence of seedlings, saplings, and mangrove trees. This research was conducted in October 2024 in the waters of Kampung Batu Licin East Bintan, the method used in this study is purposive sampling which considers the area around the post-bauxite mine and the area that is still natural. By calculating mangrove density and analyzing the level of regeneration. At the research site found 8 types of mangroves such as Avicenia lanata, Bruguiera gymnorrhiza, Bruguiera cylindrica, Rhizhopora apiculata, Ceriops tagal, Rhizophora mucronata, Xylocarpus granatum, and Sonneratia alba. The density of mangrove seedlings on open land (post bauxite mine) has a high value with a value of 84,000 ind/ha, saplings with a value of 4,960 ind/ha, and trees with a value of 1,310 ind/ha are in the medium category. While on natural land for seedling density with a value of 54,000 ind/ha, at the stake level with a value of 5,240 ind/ha, and trees 1,760 ind/ha are in the very dense category. For the level of regeneration in the two areas is equally good because the presence of seedlings is more than saplings and saplings are more than trees
Nutrional analysis of male mackerel gyoza (Rastrelliger kanaguarta) fortififed with Kappaphycus alvarezii Seaweed
No full textFood is very important as a source of nutrient for the body every day. Currently, the trend of fast food is increasingly attracting people’s interest without considering the nutrional content in it. Gyoza is a fast food similar to dimsum that has a savory and taste in the from of jiozia. Modification of gyoza filling using male mackerel (Rastrelliger kanaguarta) and Kappaphycus alvrezii seaweed is made as an alternative to healthy fast food. This study aims to determine the characteristic of the chemical and sensory quality of male mackerel gyoza (Rastrelliger kanaguarta) fortifed with Kappaphycus alvarezii seaweed. This research method was carried out in March-June 2025 using the experimental laboratory method with three treatments and repetitions for chemical test. The addition of Kappaphycus alvarezii seaweed to the nutrition of male mackerel gyoza had a significant effect (p<0.005) based on the ANOVA test, highest protein content in sample A without seaweed 19.97%, the highest iodine content in sample C fortified with 20 grams of seaweed 20.06 µg/g, the highest fiber content sample C fortified with 20 grams of seaweed with a result of 9.55%
Domestication of the Papua endemic fish rainbow Kurumoi (Melanotaenia parva) through different feeding treatments for optimizing survival
No full textThe Rainbow Kurumoi ornamental fish (Melanotaenia parva) is an endemic species of Indonesia, originating from Lake Kurumoi in Papua, and is currently experiencing high levels of exploitation. Immediate efforts to rescue and conserve the Rainbow Kurumoi fish are crucial to prevent its extinction. The development of Rainbow Kurumoi fish farming has significant potential, particularly in South Sorong, which serves as a center for the germplasm of the Rainbow Boesmani fish species. This study was conducted to evaluate the growth and survival of Rainbow Boesmani fish using different feeding programs and water quality management to enhance their production. The research was designed using a Completely Randomized Design (CRD) with four treatments and three replications. The treatments tested were: A (pellets), B (Artemia), C (hair worms), and D (water fleas). Data were analyzed using a CRD, and if significant differences were found, a further Duncan’s test was performed. The results indicated that different feeding treatments had a significant effect on the absolute weight growth of Rainbow Kurumoi fish from the third to the sixth week. The feeding treatments also significantly influenced the increase in the absolute length of the fish from the first to the sixth week. The survival rate of the Kurumoi fish, when fed different diets, ranged from 70% to 83%, which is considered to be in the good category
Biomass and carbon sequestration of mangrove stands, necromass and substrates in Lantebung Ecotourism, Makassar
No full textMangrove ecosystems are recognized as one of the largest carbon stores among other coastal ecosystems. Its ecological role is vital, especially in absorbing and storing carbon in various compartments, such as live stands (branches and trunks), necromass (dead trees and branches), and soil substrates rich in organic matter. The diversity of mangrove species, such as Rhizophora mucronata, Avicennia alba, and Acanthus ilicifolius, contributes variably to biomass accumulation and carbon sequestration potential. This study was conducted at Lantebung Mangrove Ecotourism in Makassar to evaluate oceanographic parameters, biomass values, and carbon sequestration potential of the three components as a basis for sustainable coastal ecosystem management. Sampling was done by purposive sampling method in a 40 x 40 meter quadrant transect, and all parts of the vegetation were analyzed in the laboratory using the gravimetric method to measure the dry carbon content. The results showed that the oceanographic parameters of the mangrove habitat were ideal and in accordance with the seawater quality standards for biota; the biomass of necromass, branches and substrates of Avicennia alba was greater than that of Rhizophora mucronata and Acanthus ilicifolius; meanwhile the compartment capable of absorbing the highest carbon in mangroves was the branches of Avicennia alba, while the lowest was the substrate of Rhizopora mucronata
The effect of deacetylation temperature on quality crab chitosan (Portunus pelagicus)
No full textCrab (Portunus pelagicus) is a fishery export commodity, especially to Japan, the European Union and the United States. On the other hand, the crab part, namely the shell, is still not utilized optimally so it becomes waste. To make crab shells valuable, several studies have revealed the presence of useful substances known as chitin and chitosan. Therefore, this research was carried out with the aim of knowing the effect of deacetylation temperature on the quality of chitosan and the optimal deacetylation temperature so as to produce good quality chitosan. Method: This study employs an experimental methodology based on Fully Randomized Design (CRD) analysis. Several deacetylation temperature treatments (00C, 900C, 950C, 1000C, 1050C, 1100C, 1150C, 1200C) were repeated three times in this study's design. Analyses of yield, moisture content, ash content, protein content, and acetyl content serve as test parameters. Result: The results showed that the treatment using different deacetylation temperatures had a very significant effect (Fcrit > Ftable 1%) on water content, ash content, protein content, acetyl content and had no significant effect (Fcrit > Ftable 5%) on the yield. The optimal deacetylation temperature was 1200C, with a yield of 19.050%, water content of 8.340%, ash content of 0.022%, protein content of 0.198%, and acetyl content of 84.870%. Conclusion: The conclusion based on analysis that the best temperature deacetylation in producing quality chitosan crab is 1200C