DEPIK Jurnal Ilmu-Ilmu Perairan, Pesisir dan Perikanan
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The effect of lignosulfonate chemical stimulator to the metabolites of Euglena sp.
Full text linkEuglena sp. contains several metabolites that play a role in various sectors, likely biofuels, food, feed, and pharmaceuticals. Multiple treatments are required to increase the content of Euglena sp. to support its use. In this study, a chemical stimulant in the form of lignosulfonate was added to Euglena sp. in order to increase its natural potency as measured by lipid, carbohydrate, protein, paramylon content, and biomass productivity. lignosulfonate is a macromolecular polyelectrolyte and anionic surfactant which is unique and multifunctional. This lignosulfonate can act as an emulsifier, dispersing agent, binder, and stabilizer of lipids in Euglena sp. cells. This can help improve the physical quality of pellets in Euglena sp. cells. In addition to the lignosulfonate chemical stimulator, it can affect the growth process of Euglena sp. so that it can produce good-quality cells. In addition, it also aims to determine the accumulation of significantly different metabolites. The method used was a Completely Randomized Factorial Design (CRD) with three treatments and three replications. The results obtained indicated that the addition of lignosulfonate was significantly different in the cell and protein density tests. Therefore, the optimal concentration of lignosulfonate can be used as an agent to increase the growth rate and metabolites of Euglena sp. significantl
Ectoparasites and endoparasites on baree (Lingula anatina, Lamarck 1801) at Ujung Pancu Beach, Aceh Besar
Full text linkLingula anatina or also known as baree is an animal that has legs and no spine. Baree is one of the few marine avertebrates that has the most complete fossil record, this species can play a role in ecological monitoring and maintaining the health of marine ecosystems. This study aims to identify and analyze the types of ectoparasites and endoparasites as well as measure the prevalence and intensity of infection in Lingula anatina (baree) at Ujung Pancu Beach, Aceh Besar. The results showed the presence of ectoparasites Pedicellina cernua (Entoprocta) and Unitubilotestis sp. (Platyhelminthes), as well as endoparasites Perkinsus spp. (Perkinsozoa) and Hysterothylacium aduncum (Nematoda). The prevalence of ectoparasite infection ranged from 0.08%, with an intensity of 1 individual per sample, while the prevalence of endoparasites ranged from 0.03%-0.22% with an intensity of 1.45-2.81 individuals per sample. These findings add insight into the parasites infecting Lingula anatina and contribute to ecological monitoring and marine ecosystem health.Keywords:L. anatinaFilter feederNematodaPlatyhelminthe
Ectoparasite Analysis in Vaname Shrimp in Padang Pariaman, West Sumatra, Indonesia
Full text linkEctoparasites pose a significant threat to the health and productivity of vaname shrimp (Litopenaeus vannamei) in aquaculture settings, particularly in tropical regions. This study aimed to assess the prevalence, intensity, and dominance of ectoparasites in vaname shrimp ponds in Padang Pariaman, West Sumatra, and to identify factors influencing their distribution. Sampling was conducted across five different pond stations, with each station subjected to regular water quality assessments, temperature monitoring, and parasitological examinations. Ectoparasites were identified and quantified using standard microscopic techniques to determine prevalence, intensity, and dominance. Results indicated that Station II had the highest prevalence (100%) and intensity (69) of ectoparasites, likely due to poor water quality, fluctuating temperatures, and inadequate pond management practices. In contrast, Stations I, III, IV, and V exhibited lower levels of ectoparasite infestation, with Station I having moderate prevalence (80%) and intensity (21) and the remaining stations showing relatively low infestation levels. The dominant ectoparasites identified were Epystylis sp, Zoothamnium sp, Vorticella sp, and Ichthyobodo sp, with varying levels of dominance across the stations, suggesting a correlation with environmental conditions and pond management practices. Effective management of water quality, stocking densities, and regular monitoring can help mitigate ectoparasite infestations in shrimp ponds. This research provides essential insights into sustainable shrimp aquaculture practices, emphasizing the importance of improved pond management strategies to enhance shrimp health and productivity while minimizing the impact of ectoparasites on aquaculture systems in tropical regions
Community structure of bivalve in the Curah Ombo River Estuary, Java, Indonesia
Full text linkCurah Ombo River is an estuarine water body with a muddy substrate that serves as the optimal habitat for bivalves. However, this water body experiences fluctuations in water conditions originating from both terrestrial sources and climate change. The impacts of these conditions trigger changes in the biological conditions, including bivalves.The objective of this study was to determine the diversity index, uniformity index, dominance index, and species richness index of bivalve molluscs found in the Curah Ombo River from Marchto June. The research parameters included identification, diversity index values (H'), uniformity (E), dominance (C), and species richness (R). Water quality was also measured as a supporting factor, including depth, temperature, dissolved oxygen (DO), pH, salinity, and brightness. All data were analyzed for their relationships using Principal Component Analysis (PCA). The results obtained at three points revealed nine species: Paratapes sp., Anadara antiquata, Anadara transversa, Anadara granosa, Meretrix meretrix, Scapharca pilula, Mytilus placuna, and Atrina pectinata. Point 2 showed the highest values for most diversity index values (H'), uniformity (E), dominance (C), and species richness (R), exceeding points 1 and 3. The results of Principal Component Analysis (PCA) show that total bivalve mollusks are categorized into one category together with salinity, light intensity, location, dissolved oxygen (DO), depth, and temperature.Keywords:MarineAquacultureInvertebratesLife feedEnvironmentEconom
Sustaining grouper populations: eafm-based evaluation in the marine ecosystem of Sabang, Aceh
Full text linkSabang as the westernmost region of Indonesia and bordering the Indian Ocean and the Malacca Strait has fishery potential that must be maintained so that it is sustainable. Good management of grouper fish (Epinephelus sp.) resources is a solution so that fishery potential remains sustainable, one of which is the ecosystem approach. So far, many studies related to grouper management based on an ecosystem approach have been carried out in several regions in Indonesia, but none have focused on fisheries in Sabang. Therefore, this study aims to assess the status of grouper resource management, provide management recommendations and disseminate the results of the assessment of grouper resource management status in Sabang. This research was conducted from July to August 2022, located in Sabang, Aceh. Observation and direct interviews were conducted to collect the data and then analyzed by a multi-criteria analysis with composite index development. Based on the value of these indicators, it shows that the domain of grouper fish resources in Sabang caught using the hand line is good category with a green flag model and a composite value of 82. This means that the management of grouper fish resources in Sabang has not been running optimally. So, it is necessary to improve fisheries management in several aspects to support sustainable fisheries management.Keywords:GrouperEAFMSabangFisheriesSustainabilit
The role of women in fish smoking processing and its impact on culinary tourism image in Malalanda Village, Kulisusu Districti
Full text linkThis study aims to analyze the role of women in promoting culinary tourism and to determine the production volume of smoked fish in Malalanda Village, Kulisusu District, North Buton Regency. The research was conducted from March to April 2024 using a purposive sampling method, considering the village's reputation for smoked fish production managed mostly by women. The population consisted of 19 female smoked fish processors, all of whom were selected as respondents through a census approach. Data were collected via interviews using questionnaires, direct observation, and secondary data from related institutions and literature. The results show that women are actively involved in all stages of smoked fish processing, including preparation, cleaning, sorting, smoking, cooling, and marketing. Production occurs up to 28 times per month, yielding a total of 14,334 pieces of smoked skipjack and tuna monthly. The highest individual output reached 952 fish per month, with an average of 796 fish per woman. These activities not only sustain culinary tourism but also contribute significantly to household income. The development of culinary tourism in the area highlights the vital economic role of women in local fisheries-based enterprises.Keywords:Culinary tourismIncomeSmoked fishWomen's roleWelfar
Evaluation of the water suitability of floating net cages aquaculture in Kedung Ombo Reservoir, Central Java
Full text linkKedung Ombo Reservoir is one of the reservoirs in Central Java which is used for irrigation, tourism, and aquaculture activities. Common problems in reservoir waters are nutrient enrichment by organic waste from fish feed and other sources. The aim of this study was to evaluate the level of water suitability based on water quality. This study was conducted in June-August 2023. Sampling was carried out at three stations with different floating net cage densities. The water quality variables measured included dissolved oxygen (DO), temperature, pH, transparency, turbidity, ammonia, biochemical oxygen demand (BOD), nitrate, phosphate, and chlorophyll-a. Evaluation of the water suitability for floating net cage waters in Kedung Ombo Reservoir was determined by a weighting matrix and water suitability index. The water suitability evaluation of floating net cages in three stations was categorized as suitable. All variables were suitable except BOD at all stations and DO in stations 1 and 3.Keywords:Dissolved oxygenFloating net cageKedung Ombo ReservoirSuitabilityWater qualit
The effect of molasses, tapioca and sago flour on biofloc system and volume of growth performance in whiteleg shrimp Litopenaeus vannamei
Full text linkDespite the high commercial success the whiteleg shrimp industry has achieved, challenges related to water quality and disease remain major issues. One approach to address these problems is Biofloc Technology (BFT). Carbon sources have been one of the factors influencing the characteristics of BFT. Some organic carbon sources used include molasses, tapioca flour, and sago flour. This study aimed to evaluate and compare the use of molasses, tapioca flour, and sago flour as organic carbon sources in BFT. It focused on examining, their impact on floc density and the growth performance of whiteleg shrimp. The study was conducted from November to December 2023 using a completely randomized design with treatments including a control, molasses, tapioca flour, and sago flour, each with three replicates. Parameters measured included biofloc volume, weight gain, average daily growth, survival rate, and feed conversion ratio. The results showed that BFV treatments with molasses, tapioca flour, and sago flour had significant differences compared to the control group. Sago flour provided a significant increase in BFV. The growth performance of whiteleg shrimp in treatments with molasses, tapioca flour, and sago flour improved and showed significant differences compared to the control. The application of BFT using molasses, tapioca flour, and sago flour as organic carbon sources significantly enhanced the biofloc volume, growth performance, feed conversion ratio, and survival rate of whiteleg shrimp. Among the tested carbon sources, sago flour demonstrated the highest biofloc volume and the most significant improvement in shrimp growth and feed efficiency.Keywords:Biofloc technologyMolassesSago flourTapioca flourWhiteleg shrim
Spatial distribution of micronutrients in Pekalongan coastal waters: water quality and environmental impact assessment
Full text linkThe coastal areas of Pekalongan, which are densely populated with activities such as ports, industries, and settlements, are highly vulnerable to changes in water quality due to nutrient distribution. This study aims to explore the distribution patterns and abundance of micronutrients in Pekalongan coastal and their implications for water quality and environmental impacts. Samples were taken from Mrican River, Pencongan River, and Wonokerto Beach. The analysis involved spatial distribution, statistical tests with Principal Component Analysis (PCA), and water quality assessment using CCME-WQI. The results showed that the highest concentrations of micronutrients were found in iron in RW 6 of Mrican River, copper in SW 4 of Wonokerto Beach, and zinc in SW 5 of Wonokerto Beach. Based on the CCME-WQI, the quality of Pekalongan coastal waters is classified as poor, potentially posing a great risk to aquatic biota and the health of humans who consume polluted biota. These findings underscore the urgency of taking mitigation measures against micronutrient contamination in coastal areas.Keywords:Pekalongan CoastSpatial DistributionMicronutrientWater QualityCoastal Water
Effect of Extracellular Crude Protein (ECP) on expression IL-1, IL-6, IFN- in nile tilapia (Oreochromis niloticus)
Full text linkModern strategies incorporate preventive measures such as extracellular products, as soluble proteins with antigenic properties, as well as generating a broad immune response. The aim of research is to determine and analyze the effect of the extracellular product of E. tarda on enhancing the immunity of Nile tilapia (O. niloticus). The research design with treatment durations of d0, 3rd, 6th, 9th day, and control (A, B, C, D, K). ECP vaccination was injected intraperitoneally at a dose of 0.1 ml/fish. The parameters analyzed are the expression of IL-1, IL-6, and IFN-, phagocytic activity, leukocyte differential, total white blood cells, and relative percent survival. The results of phagocytosis activity were highest in treatment C at 84.18% 1.81. The highest leukocyte differential in treatment C was lymphocytes at 56% 2.00, monocytes at 28% 2.00, and 16% 0.00, with a total leukocyte count of 29 x 10^3 cells 2.64, and RPS values ranging from 83.33% to 100% over 9 days of post-vaccination maintenance. Then, post-vaccination, there was an increase in the expression levels of the cytokine genes IL-1 and IL-6, but there was no increase in the expression levels of the IFN- gene compared to the control in Nile tilapia. (O. niloticus).Keywords:ECPIL-1IL-6IFN-Immune Respons