Portal Jurnal Ilmiah Sekolah Tinggi Ilmu Pertanian (STIP) Wuna Raha
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The effectiveness of fermented bait on dragon fruit orchard stems on catches in the Mangrove and Tebung Tourism waters
No full textThis study aimed to evaluate the effectiveness of fermented bait used in dragon-type fish traps (bubu naga) in enhancing fishing yields in the mangrove ecotourism waters of Lantebung. Fermented bait is expected to enhance attractiveness to fish, crabs, and shrimp due to the distinctive aroma produced during fermentation, which stimulates the olfactory organs of target species. The study employed bubu naga operated in shallow mangrove waters, with fermented trash fish used as bait. The catch composition included various aquatic species, with the swimming crab (Portunus pelagicus) being the dominant species, followed by whiteleg shrimp (Litopenaeus vannamei), mullet (Moolgarda seheli), and others such as dogol shrimp, mantis shrimp, kerong-kerong, and mud crab (Scylla serrata). A total of 151 individual organisms were recorded during the study. These results demonstrate that fermented bait is effective in enhancing catch performance, particularly for swimming crabs and shrimp. Thus, its use is recommended as a sustainable fishing strategy utilizing environmentally friendly gear in mangrove areas
Analysis of the stomach contents of the rabbitfish (Siganus guttatus Bloch, 1787) in the bottom trap fishing gear in the waters of Tanakeke Island
No full textThe study was conducted to identify the types of food consumed and to determine the percentage composition of each food category based on identification results. A total of 45 rabbitfish samples, divided into three size groups (small, medium, and large), were analyzed for their stomach contents using microscopic identification methods and quantified with the Index of Relative Importance (IRI). The results showed that the stomach contents of rabbitfish were dominated by macroalgae, particularly the Rhodophyta group, followed by seagrass (Enhalus acoroides) and detritus. The highest IRI value was found in red algae, which served as the primary diet, while seagrass and detritus functioned as supplementary food items. The conclusion of this study indicates that rabbitfish in the waters of Tanakeke Island exhibit an opportunistic herbivorous feeding pattern, dominated by macroalgae and seagrass. This feeding pattern highlights the ecological role of rabbitfish in maintaining the balance of seagrass ecosystems. These findings are expected to provide a scientific basis for supporting sustainable rabbitfish fisheries management and for promoting the conservation of coastal ecosystems
Habitat characteristics and distribution patterns of blood cockle Anadara antiquata (Linnaeus, 1758) in the Waters of Senggarang Besar, Tanjungpinang City
No full textThis study aims to identify the habitat characteristics and distribution patterns of the antique ark Anadara antiquata in the waters of Senggarang Besar, Tanjungpinang City. The research was conducted from July to September 2024. The research process included site surveys, field data collection, sample analysis, data processing, data analysis, and preparation of the final report. Sampling points were determined using purposive sampling at three observation stations. Antique ark samples were collected using the sweep area method at each station, with an observed area of 10 x 10 meters. The results showed that antique ark in Senggarang Besar prefer habitats with high organic content, relatively lower water temperatures within the optimal range (around 29.83°C), stable salinity (around 30 ppt), and low but still safe levels of dissolved oxygen (around 5.17 mg/L), with these characteristics being most evident at Station I. The distribution pattern analysis showed that all stations had an index of dispersion (Ip) value greater than 0.5, indicating a clumped distribution pattern of the antique ark population in the study area
Mangrove Health Index Using MonMang v2.0 Application In Sei Nyirih, Tanjungpinang City
No full textThe mangrove ecosystem is a plant that is closely related to water. Mangroves have an important role in preserving aquatic ecosystems, beaches and even land areas. The important role of mangroves in these waters will of course be directly related to the health condition of mangroves in an ecosystem. Mangrove health is an integral part of sustainable management of mangrove ecosystems. The research carried out on the mangrove ecosystem in the Sei Nyirih water area aims to determine the Mangrove Health Index, Community Structure and Important Value Index. This research method uses Purposive Sampling at three stations with three plots at each station. The results of the research in the Sei Nyirih mangrove area were divided into three categories, namely the Tree Category, Sapling Category and Seedling Category with the types found namely Rhizopora apiculata, Bruguiera gymnorhiza, Xylocarpus granatum, Schyphipora hysrophylacea, Ceriops tagal and Lumnitzera littorea. The Importance Value Index is dominated by the Rhizopora apiculata type in the Tree and Sapling Category, while in the Seedling Category it is the Xylocarpus granatum type. Then the Mangrove Health Index (MHI) obtained from the MonMang V 2.0 Application Station 1 with an average of 67.34% or in the Excellent category, Station 2 with an average of 66.57% or in the Moderate category and Station 3 with an average of 67.62% or in the Excellent category. Meanwhile, the Mangrove Health Index uses Excel Station 1 with an average of 76.07% or in the Excellent category, Station 2 with an average of 74.96% or in the Excellent category and Station 3 with an average of 78.62% or in the Excellent category
Mangrove litter productivity after community forest implementation in Busung Village, Bintan Regency
No full textMangrove ecosystems play a crucial role both ecologically and economically. However, in Bintan Regency, their area has significantly declined due to development activities. This research aims to determine the productivity of the mangrove ecosystem in Busung Village, Bintan Regency, following the implementation of HKm. The study was conducted from April to May 2025 using a purposive sampling method with three observation stations, each consisting of three plots. Observations were made on litter production, decomposition, and mangrove crabs (Scylla sp.) parameters. Litter samples were collected using three 1×1 meter litter traps per plot, while decomposition was measured using litter bags, and mangrove crab samples were collected using foldable traps. Data correlation analysis between parameters was performed using Pearson correlation heatmaps and Principal Component Analysis (PCA). The results show that litter production in the Busung Village mangrove ecosystem was dominated by leaf components (19.51 g dry weight/m2 /10 days), with an average total production of 84.74 g dry weight/m2/10 days. Correlation analysis across the three stations indicated that mangrove crabs play a role in regulating mangrove litter productivity through their fragmentation/shredding activities, with varying influences depending on the level of human activity and environmental conditions. In areas with minimal activity (Station 1), an increase in crab density and weight significantly reduced the amount of litter. In fishing areas (Station 2), a healthy nutrient cycle was observed with positive correlations between parameters, while crabs controlled litter stock through consumption and fragmentation. In aquaculture areas (Station 3), the productive environment supported crab growth, although litter availability had less direct impact on the crabs
Water quality analysis on the growth of seaweed (Kappaphycus alvarezii) off-bottom method, Ketapang District, South Lampung
No full textSeaweed Kaphapicus alvarezii is very popular in cultivation because it has high economic value and has quite large development potential in Ruguk Village, Ketapang District, South Lampung Regency. Water quality is a factor that influences the growth of seaweed, including the Kaphapicus alvarezii type, both physical and chemical water quality. This research aims to determine the condition of water quality in the seaweed cultivation area of Ruguk Village, Ketapang District, South Lampung Regency, meets the optimal living conditions for cultivating Kaphapicus alvarezii seaweed. This research is a type of descriptive research with a survey method carried out by taking water samples at seaweed cultivation locations and measuring the increase in seaweed growth every week for 4 weeks. The parameters observed in this research were the physical and chemical parameters of the water quality of the seaweed rearing media at the research location which consisted of temperature, brightness, current, pH, salinity, dissolved oxygen (DO), and phosphate and relative growth of the seaweed. Based on the results of observations during the research, it can be concluded that the water quality conditions, both physical and chemical water quality in the seaweed cultivation area in Ruguk Village, Ketapang District, South Lampung Regency, are in accordance with the standard quality requirements for the growth of Kaphapicus alvarezii seaweed, namely temperature 29.1-30.2⁰C, brightness 0,8-1.5 m, current strength 0.20-0.37m/sec, depth 0.8–1.5 m, pH 7.5-8.17, salinity 26-30 ppt, DO of 4.6-7.2 ppm, nitrate 0.2-0.92 mg/L and phosphate of 0.258-0.711 mg /
Effectiveness of using natural bait in bottom trap in North Galesong Waters
No full textThe bottom trap is a traditional fishing gear that is still widely used by fishermen in coastal waters. The purpose of this study is to ascertain the composition of catches in the waters surrounding North Galesong as well as the efficacy of natural bait in bottom traps. Three different kinds of bait—flying fish, mackerel, and yellow snapper—were used in the quantitative experimental investigation, which took place between May and June 2025. Over 16 excursions at three stations, each was put to the test. The results showed that demersal fish such as red snapper, grouper, and barracuda dominated the catch. Flying fish bait yielded the highest catch (847 fish/52.94%), followed by mackerel (718 fish/44.90%) and yellowtail (614 fish/38.38%). Effectiveness was influenced by bait aroma, texture, and oceanographic conditions. Floating bait proved to be the most effective and has the potential to sustainably increase fishermen's catch yields
The status of mangrove ecosystems on Keter Island, Tembeling Waters, Bintan Regency, Riau Islands
No full textKeter Island, located in Tembeling Tanjung Village, Bintan Regency, harbors a diverse mangrove ecosystem, predominantly composed of Rhizophora species. This study aimed to assess mangrove density at the tree level, evaluate vegetation cover, and determine the ecological status of the mangrove ecosystem based on its level of degradation. Field surveys were conducted to obtain an overview of ecosystem conditions, followed by systematic random sampling at sites within Tembeling waters where mangroves are distributed. The results indicate that mangrove tree density falls within the medium category, while canopy cover is classified as very dense with good ecological quality. Overall, the mangrove ecosystem on Keter Island is categorized as moderate, although it still displays favorable ecological characteristics. These findings suggest that while the mangrove ecosystem remains in a medium condition, degradation is ongoing, thereby necessitating further research and rehabilitation efforts. Given the vital role of mangroves in sustaining the ecological balance of small islands, direct monitoring and intervention by relevant authorities are essential to reduce degradation and ensure the long-term sustainability of the mangrove forest on Keter Island
Effect of chitosan from crab shells (Portunus pelagicus) on the chemical properties of liquid fertilizer
No full textSwimming crab shell waste is a fishery byproduct that has the potential to pollute the environment if not utilized properly. One alternative utilization is to process it into chitosan, which is then formulated into liquid fertilizer. This study aimed to determine the effect of chitosan concentration based on swimming crab shells on the chemical properties of liquid fertilizer. The study was conducted from February to March 2025. Chitosan and liquid fertilizer production was conducted at the Fishery Products Biochemistry Laboratory, Pangkep State Agricultural Polytechnic. The method used was an experimental laboratory with a Completely Randomized Design (CRD), with three treatments and three replications, with chitosan concentrations of 2%, 4%, and 6%. Data were analyzed using One-Way ANOVA and the W-Tukey HSD test. If the assumption of homogeneity of variance was not met, Welch ANOVA with the Games-Howell test was used to determine differences in effects between treatments. The results showed that the treatment had a significant effect (P<0.05) on most of the chemical properties of liquid fertilizer. The chemical properties of pH were (2.90 3.00 3.23), C-organic were (1.08% 2.72% 4.21%), macronutrients N + P2O5 + K2O were (0.76% 0.64% 1.19%). In conclusion, increasing the concentration of chitosan improves the chemical properties of liquid fertilizer, so that crab shell chitosan has the potential as a material for liquid organic fertilizer formulation
Content of sea grapes (Caulerpa racemose) which grow in the waters of The Button Strait and The Tiworo Strait
No full textSea grapes (Caulerpa racemosa) is a variety of green algae grown in coastal areas with bioactive compounds that have been used by humans as antitumors, antivirals, and antimicrobials. The coastal regions of Lohia district of Muna, including part of Buton Strait, and the western part of Muna district, specifically in the North Tiworo District of Muna West district, which is part of Tiworo Strait, cultivate sea wine. The purpose of this research is to identify the compounds contained in the sea wine grown in the waters of Buton Strait in Muna district, Lohía district, and Tiworo Strait in Muna West District of Tiworo North district. The methods used in this study are observation and determination of the sample take point, sampling, sample preparation, and identification of sample compounds using a spectroscopic photometer. It was found that the samples from the Buton Strait contained saponins, alkaloids, and tannins, with a water content of 15.13%, an ash content of 26.37%, a protein content of 5.24%, a fat content of 0.16%, and carbohydrates making up 53.10%. The samples from the Tiworo Strait, on the other hand, contained saponins, alkaloids, and tannins, with a water content of 15.35%, an ash content of 22.9%, a protein content of 5.20%, a fat content of 0.14%, and carbohydrates making up 56.62%