Jurnal Perikanan Unram

THE EFFECT OF USING CLOVE POWDER AS A FEED ADDITIVE IN FEED ON THE GROWTH AND SURVIVAL OF TILAPIA (Oreochromis niloticus) RED STRAIN FINGERLINGS

2024-05-29T10:55:30+08:00

Feed additives or feed additives are now starting to become a necessity as additional feed in fish feed that can increase fish growth. This research aims to determine the effect of using clove powder as a feed additive in feed on the growth rate and survival rate of red tilapia fingerlings. The research was carried out at the Aquaculture Laboratory Building 4, Faculty of Fisheries and Marine Sciences, Padjadjaran University, Jatinangor from June to August 2023. The research method used is an experimental method using a complete randomized design consisting of four treatments and four repeats. The treatment used is the use of clove powder at doses of 0% (control), 0.5%, 1%, and 1.5% as feed additives in commercial feed. The observation parameters consist of specific growth rate, survival rate, and water quality. The results showed that the use of clove powder as a feed additive in commercial feed with a dose of 0.5-1.5% tended to increase the growth rate of red tilapia fry with specific growth rate values ranging from 1.17 ± 0.30%/day - 1.27 ± 0.12%/day. The survival rate of red tilapia fry with a dose of clove powder use of 1.5% tended to give the best results (97.50 ± 5.00%). The water quality of red tilapia fry maintenance during the study met the requirements of water quality standards for tilapia farming

PRELIMINARY STUDY OF THE POTENTIAL OF SHRIMP AND ITS MANAGEMENT PERSPECTIVE IN NEGERI SEJUTA BAKAU, WAROPEN REGENCY, PAPUA PROVINCE

2024-05-29T17:41:18+08:00

Shrimp are a superior commodity caught in the waters of the Land of a Million Mangroves, Waropen Regency, Papua Province. This research was carried out in February 2023 in the waters of Waropen Regency with the aim of assessing the potential of shrimp species and their management entities. This research uses a survey method in data collection and species identification is carried out by examining basic morphometric characteristics, namely (color and body shape). The results of the research show that there are 3 types of shrimp belonging to the Penaeid family, and 1 type belonging to the Palaemonidae family. The potential of shrimp at the research location is very potential. This is supported by the condition of the habitat and aquatic environment which is still good. Apart from that, utilization is still relatively low, where fishing tools and facilities are still relatively simple. However, to maintain its sustainability it is necessary to manage and utilize it in a measurable manner

STRATEGY FOR DEVELOPING CAPTURED FISHERIES IN PEMALANG REGENCY

2024-05-29T17:42:20+08:00

Pemalang Regency is one of the regencies that has abundant capture fisheries potential. However, there are several problems in developing capture fisheries. This research aims to identify and assess internal and external factors in the development of the capture fisheries sector and to develop a strategy for developing capture fisheries in Pemalang Regency. This research uses SWOT (Strength, Weakness, Opportunity, and Treat) analysis to develop a development strategy. The data collected includes primary data and secondary data. The research results show that the value of Internal Strategic Factors Analysis Summary (IFAS) and External Strategic Factors Analysis Summary (EFAS) have a positive value so it is in Quadrant I. Based on this, an aggressive strategy is the main priority in developing capture fisheries in Pemalang Regency.

RECIRCULATING AQUACULTURE SYSTEM FOR ORNAMENTAL FISH PRODUCTION (LITERATURE REVIEW)

2024-06-04T15:09:04+08:00

Ornamental fish have their own charm due to the beauty of their shapes and color patterns. Ornamental fish have good sales prospects and have high economic value, so many ornamental fish hobbyists and breeders are involved in them. Cultivating ornamental fish is certainly not free from obstacles, such as ponds or aquariums that have been contaminated with microbes which can cause fish to get sick or even cause death. One way to maintain fish health while increasing ornamental fish production is to monitor water quality. Efforts that can be made to overcome the above problems are to apply a recirculating aquaculture system. This study aims to provide information on the use of an effective aquaculture recirculation system to increase ornamental fish production while reducing ornamental fish mortality rates. The information that will be provided is a study from several journals regarding circuits for recirculation systems and optimizing the use of filter combinations in recirculation systems.

ANALYSIS OF TUNA PRICE VOLATILITY IN PRODUCTION CENTERS IN INDONESIA APPLICATION MODEL ARIMA (AUTOREGRESSIVE INTEGRATED MOVING AVERAGE)

2024-06-04T15:10:15+08:00

One of the marine biological resources in Indonesia is tuna which has a high enough economic value so that tuna can be used as one of the mainstays of non-oil and gas exports from the fisheries sector. The purpose of the study included: analyzing the form of the ARIMA model that most appropriately measures the price volatility of tuna fish in production centers in Indonesia and analyzes the price volatility of tuna fish in production centers in Indonesia. The study used 108 months of time series data from January 2012 to December 2020. In this study, the data analysis method used was ARIMA. The results showed that 1) the best models to measure tuna price volatility are National ARIMA model (3,1,2), Aceh model ARIMA (2,1,2), Bali model ARIMA (1,1,12), North Sulawesi model ARIMA (29,1,29), North Maluku model MA (0,1,2) and West Papua model ARIMA (2,1,1), 2) On the data on tuna prices at the producer level that has been analyzed with the best ARIMA model that the volatility of national tuna prices, Aceh, Bali, North Sulawesi, North Maluku and West Papua are high. The price of tuna in North Maluku cannot be analyzed due to the (0,1,2) moving average model

QUALITY AND MICROBIOLOGICAL CONDITIONS OF SMALL-SCALE SHRIMP PASTE PROCESSING IN CIREBON PRODUCTION CENTERS

2024-07-19T18:00:05+08:00

Terasi is a fermented product made from fish or shrimp, that undergoes a salting process. The small-medium scale of shrimp paste industry are widespread in Indonesia, particularly in the Cirebon area. Traditional processing of shrimp paste involves natural or spontaneous fermentation processes, which involves microbes from the surrounding environment that can grow and contaminate the shrimp paste. This study aims to analyze the microbiological conditions and quality of traditional shrimp paste produced in Cirebon production centers based on SNI 2716: 2016 for shrimp paste. The survey method used purposive sampling based on specific criteria to determine sample points. The observation parameters tested included pathogenic bacteria E.coli (presumptive) using the petrifilm method (3M^TM), Salmonella sp. and Vibrio parahaemolyticus using the PCR method, total mold using the ALT (Total Plate Number) method, a_w, pH, and proximate. The overall data was analyzed using quantitative descriptive analysis. The results showed that E.Coli counts ranging from 6.00 x 10² to 2.10 x 10⁴ CFU/g, thus not meeting SNI 2716: 2016 standard for shrimp paste. However, the final product did not show contamination by Salmonella sp, and Vibrio parahaemolyticus. The total mold contamination in the final shrimp paste product from processor A (Desa Jatimerta) and B (Desa Panjunan) ranged from 1.80 x 10² to 4.30 x 10³ CFU/g. The chemical analysist result of the final products from both processor generally met the SNI 2716: 2016 standards, except for processor B’s samples, where the water and ash content did not meet the standards.

Key words: Fermentation, Molecular Identification, Contamination, Pathogen, Shrimp Paste

EFFECTIVENESS OF DIFFERENT PHOTOPERIODS ON THE GROWTH PERFORMANCE OF FRESHWATER LOBSTER (Cherax quadricarinatus) SEEDS MAINTAINED AT AN ALKALINITY OF 80 MG/L.

2024-08-05T16:05:37+08:00

One of the freshwater commodities that is thought to have the potential to sell well on the world market in the future is freshwater lobster. This animal is a nocturnal animal commodity (animal that is active at night). This animal is thought to have the potential to sell well on the world market due to the high price and market demand which has not yet been met. Therefore, research efforts are needed on freshwater lobster seeds, to increase growth and survival. One of them is the use of alkalinity and photoperiod. The research design carried out was a Completely Randomized Design (CRD). consisting of 4 treatments with 3 repetitions. During the 40 day rearing period, pellets are given. Research shows that there are significant differences between each photoperiod in the growth of absolute weight, absolute length, molting percentage, daily growth rate and survival of freshwater crayfish. Treatments with different photoperiod times showed that the best results were obtained in treatment P2 with photoperiod time (16G:8T) and the lowest in treatment 3 (21G:3T). Based on research results, it is recommended that the use of photoperiod (16G:8T) is effective for increasing the growth and survival of freshwater lobsters. The results of this research can be used as information regarding the most effective photoperiod for freshwater lobsters

OPTIMALIZING THE ROLE OF FISHERIES EXTENTION WORKERS IN FRESHWATER AQUACULTURE IN EAST BALIKPAPAN SUB-DISTRICT AT BALIKPAPAN CITY

2024-10-05T10:27:42+08:00

The aim of this research is to assess the role of fisheries extension in the development of catfish farmer groups in East Balikpapan Subdistrict. The study was carried out from January to March in East Balikpapan Subdistrict, Balikpapan City, using a census sampling method. Data were analyzed using a quantitative descriptive approach with a Likert scale model. The findings indicate that the role of fisheries extension agents in the business development of catfish farming can be evaluated both partially and cumulatively. Partially, the role of extension agents is categorized as "Medium," with the following interval scores for each indicator: motivator at 9.47, educator at 9.79, catalyst at 9.32, organizer at 9.21, communicator at 8.42, and advisor at 9.79. Cumulatively, the role of extension agents in group development is also at a "Medium" level, with a score of 56. According to the catfish farmer groups, the role of extension agents in improving business productivity is deemed sufficiently effective in helping farmers enhance their cultivation skills toward better and more productive outcomes.

TEMPERATURE AND CHLOROPHYLL VARIABILITY DURING UPWELLING PHENOMENON IN THE SOUTHHERN WATERS OF BURU ISLAND TO SERAM ISLAND

2024-10-05T17:31:05+08:00

Upwelling is the rise of water mass in the lower layer to the surface. The rise of water mass is due to wind moving above the waters so that this wind will push the water mass on the surface as a result of which water from below replaces the emptiness above. The variation in SST distribution is relatively lower and the abundance of chlorophyll as an indicator of the occurrence of the upwelling phenomenon and the effect of wind on the upwelling phenomenon. The purpose of this study was to determine the variability of SST and chlorophyll in the waters of South Buru Island to Seram Island and its effect on the upwelling phenomenon. The method used is a quantitative method with the aim of describing the state of SST and Chlorophyll in the Waters of South Buru Island to Seram Island. The results of the study showed that the analysis of the distribution of SST and chlorophyll from June to October was an upwelling phenomenon with SST in June 28.15 ° C and chlorophyll-a 0.44 mg / m³ with an average wind speed of 4.58 m / s which was the beginning of the upwelling phenomenon. For July, the SST distribution was 27.21°C and chlorophyll-a 0.54 mg/m3 with an average wind speed of 5.42 m/s. In August, the SST distribution was 26.95°C and chlorophyll-a 0.58 mg/m³ with an average wind speed of 5.32 m/s. In September, the SST distribution was 27.73°C and chlorophyll-a 0.50 mg/m³ with an average wind speed of 4.09 m/s, while in October, the distribution was 28.97°C and chlorophyll-a 0.29 mg/m³ with an average wind speed of 2.65 m/s.

PRODUCTION PERFORMANCE OF VANNAMEI SHRIMP (LITOPENAEUS VANNAMEI) CULTURED IN INTENSIVE SYSTEMS WITH DIFFERENT STOCKING DENSITIES

2024-10-05T17:31:41+08:00

Vannamei shrimp (Litopenaeus vannamei) is a significant aquaculture commodity experiencing rapid global growth, including in Indonesia, to address the decline in production of tiger shrimp. This study aims to evaluate the impact of stocking density on vannamei shrimp production in an intensive aquaculture system. Conducted over four months at PT. Laut Biru Lombok’s intensive pond, the research compared two stocking densities (211 and 189 shrimp/m²) and assessed parameters such as growth, survival rate, feed conversion ratio, and productivity. Results indicated that a lower stocking density (189 shrimp/m²) generally provided better growth, survival, and feed conversion ratio, though productivity differences were not significant. In conclusion, a lower stocking density enhances the performance of vannamei shrimp in intensive aquaculture systems

REVIEW ARTICLE, UTILIZATION OF FISHMEAL FOR FOOD NUTRITION IMPROVEMENT

2024-10-21T09:48:57+08:00

Fishmeal is a processed fish product that has the potential to improve food nutrition. This article aims to review the utilization of fishmeal in improving the nutrition of food products. The method used was a literature study and systematic review by analyzing 26 research articles published between 2014-2024 and 1 ministry report in 2020. Data were analyzed descriptively comparatively, focusing on the preparation of fishmeal, proximate composition of fishmeal, and proximate composition of food products resulting from fishmeal substitution. Results showed that the best method of making fishmeal was steaming and fat extraction, resulting in a brighter and cleaner flour. The proximate composition of fishmeal varies depending on the type of fish. Substitution of fishmeal in food products such as cookies, flakes, pizza bases, and pastries significantly increased the nutrient content, especially protein, calcium, and phosphorus, while decreasing the moisture content. Despite this, the nutritional content of these products still meets quality standards and is safe for consumption. Fishmeal is effective in increasing the nutritional value of food products, making it a promising alternative for food diversification and fortification to address malnutrition in the community.

GROWTH PERFORMANCE OF NILE TILAPIA (Oreochromis niloticus) FRY IN THE STAGNANT WATER POND SYSTEMS WITH DIFFERENT FEEDING RATES

2024-10-29T09:55:52+08:00

The activity of cultivating nile tilapia in a stagnant water pond system allows fish to utilize resources in the form of natural food and commercial feed in a balanced manner, thereby reducing the amount of external feed. This research aims to evaluate the growth performance of tilapia fry in a stagnant water pond system with different feeding levels. This research was carried out using a completely randomized design (CRD) consisting of 3 treatments for rearing tilapia fry in a stagnant water pond system with different feeding levels with three replications each, namely 3% feeding rate, 4.5% feeding rate. % and feeding rate 6%. The test tilapia fish had an average initial weight of 2.66-3.06 g and were reared for 21 days with feed supplementation containing a commercial probiotic mix dose of 0.2% and a feeding frequency of 1 time per day. The results of the research showed that different levels of feeding had a significant effect (p<0.05) on feed efficiency, feed conversion ratio and amount of feed consumption, but could still provide optimum growth rates.

EFFECT OF LIQUID ORGANIC FERTILIZER OF BAT MANURE (Chiroptera sp.) ON THE ABUNDANCE OF Nannochloropsis sp.

2024-10-29T09:55:13+08:00

Nannochloropsis sp. is a seawater phytoplanton that is often used as a natural food in aquaculture. Nannochloropsis sp. has a high nutritional content, including proteins, lipids, omega-3 fatty acids, and essential vitamins and minerals that are important for fish growth. Nannochloropsis sp. culture media using bat manure organic fertilizer can increase the abundance of Nannochloropsis sp. and is economical for aquaculture farmers. Bat manure liquid organic fertilizer which has a natural nutrient content rich in nitrogen, phosphorus, and high potassium is used as a nutrient medium in Nannochloropsis sp. This study consisted of 4 treatments of 3 replicates of bat manure organic fertilizer doses, treatment A at 0 ml/L (control), treatment B at 80 ml/L, treatment C at 100 ml/L, and treatment D at 120 ml/L. The results obtained from this research are the use of different doses of bat manure fertilizer can increase the abundance of Nannochloropsis sp. The best Nannochloropsis sp. abundance value in treatment D (120 ml/L) was 24.99 x 10⁶ cells/ml.

CORRELATION BETWEEN TOTAL ORGANIC MATTER AND ABUNDANCE OF VIBRIO SP. BACTERIA IN INTENSIVE VANNAMEI SHRIMP (Litopenaeus vannamei) PONDS

2024-10-29T09:53:38+08:00

The cultivation of vannamei shrimp (Litopenaeus vannamei) requires attention to the quality of the rearing water to prevent the occurrence of Vibrio sp. bacterial infections. This study aims to analyze the abundance of Vibrio sp., Total Organic Matter (TOM), and the relationship between organic matter and the abundance of Vibrio sp. in the cultivation media. The research stages include sample preparation, KMnO4 standardization, TOM measurement, equipment sterilization, TCBS media preparation, bacterial inoculation, and the enumeration of Vibrio sp. The data obtained were analyzed for correlation using the SPSS26 application. The results showed that TOM levels in the water samples increased as the cultivation period progressed, with the lowest TOM level being 105 ppm at the early DOC and the highest 223 ppm at the late DOC. The abundance of Vibrio sp. fluctuated, with the lowest being 2,0×10²CFU/mL at DOC 54 and the highest at DOC 89, reaching 3.0×10³ CFU/mL. The correlation value between organic matter and Vibrio sp. abundance was 0.486, indicating a moderate relationship and showing a positive linear correlation, meaning the relationship was directly proportional. This study shows that TOM positively correlates with the abundance of Vibrio sp. bacteria in intensive vannamei shrimp farming.

IDENTIFICATION OF CATCH SPECIES BY KMN. SILIWANGI USING PURSE SEINE FISHING GEAR AT MAYANGAN COASTAL FISHING PORT

2024-10-29T09:53:06+08:00

The Fisheries Potential in Indonesia is vast and spread across the entire waters of Indonesia, which are divided into 11 Fisheries Management Areas (FMA). This regional division aids in fishing activities, resource protection, and fisheries innovation for sustainable utilization. The Mayangan Coastal Fishing Port (CFP) in Probolinggo serves as a facilitator and provider of capture fisheries services, utilizing purse seine fishing gear. This study aims to identify the species and morphology of fish caught by purse seine at the Mayangan CFP. Based on observations and interviews, five dominant fish species were found: Indian mackerel 22% (338,8 kg), Short-bodied mackerel 12% (184,8 kg), Yellowstripe scad 18% (277,2 kg), Round scad 24% (369,6 kg), and Anchovy 24% (369,6 kg). Morphological identification showed variations in size and body shape, influenced by genetic and environmental factors. These results provide important information for effective and sustainable fisheries resource protection and management policies.

HIGH INFLUENCE OF WATER AND ENVIRONMENTAL QUALITY ON RESPONSE, BEHAVIOUR AND GROWTH BATAK FISH FRY (Neolissochilus thienemanni)

2024-10-29T09:52:38+08:00

Batak fish (Neolissochilus thienemanni) is an endemic species that has important ecological, economic, and cultural values for the local people of North Sumatra. However, the population of this fish has experienced a drastic decline due to environmental factors such as water quality, climate change, and pressure from human activities, such as overfishing and water pollution. One of the important aspects in Batak fish cultivation is environmental conditions, especially water height or water depth factors. Water height plays a big role in determining the quality of fish habitats, including water temperature, dissolved oxygen levels. The purpose of this study is to determine the effect of water height variations on the response, behavior and growth of Batak fish in the aquaculture environment. The study was conducted with an experimental design using a Complete Random Design (CRD) consisting of three water height treatments: 15 cm, 20 cm, and 25 cm. Observations were made every 10 days to measure the weight, length of fish, and water quality. The results showed that the water height had a significant influence on the growth of the weight and length of Batak fish. Treatment with a water height of 25 cm indicates optimal growth, while treatment with a water height of 15 cm and 20 cm indicates lower growth. The results of the study obtained where the P3 treatment (25 cm) provided the average value of the growth rate of both weight and absolute length of the highest per treatment. In other words, the average P3 is different from P1 and P2. The water level of different cultivation media affects the total water volume and movement space for Batak fish in the same cultivation container on the aquatic environmental conditions and behavior of Batak fish.

THE EFFECT OF PERIODIC FATIGUING ON SEED GROWTH AND SURVIVAL JURUNG FISH (Tor soro)

2024-10-29T09:51:58+08:00

Jurung fish is one of the endemic freshwater fish in the Central Tapanuli river which is often called Batak fish (Neolossochilus thienemanni). Periodic fasting can increase the growth rate of fish to the same level or even higher when compared to fish that are not fasted. This research aims to determine the repetition of the feeding cycle followed by constant feeding on feed consumption and feed performance, as well as determine the level of feed requirements for Jurung (Tor soro) fry after a period of 2-3 days. The information obtained includes absolute weight, absolute length and viability (SR) as well as water quality. This research was carried out at the Production Laboratory of the Matauli College of Fisheries and Maritime Affairs in July-September 2024. The method used was an experimental method with an experimental design using a Completely Randomized Design (CRD) with 4 treatments and 3 replications. The fish tested were Jurung fish fry measuring 3-5 cm. with an average duration of 1.60 ± 0.00 cm and an average weight of 2.16 ± 0.23 g. Feeding is given at 08.00-08.10, 12.00-12.10, and 16.00-16.10. The fish are kept at a stocking density of 15 fish. The results showed that the feeding approach had a large influence (P<0.05) on absolute length and absolute weight, but had no significant effect (P>0.05) on survival. Treatment P1 gave absolute weight results of 2.16 ± 0.23c, absolute length of 1.60 ± 0.00c and survival of up to 93.33% which was the highest of the treatments carried out

ANALYSIS OF SEDIMENT TEXTURE AND ORGANIC CARBON CONTENT ON MACROZOOBENTHOS ABUNDANCE IN THE MANGROVE AREA OF KARANGTALUN NORTH CILACAP

2024-10-29T09:51:19+08:00

Mangrove forests have an important role in reducing the impact of global warming as a place to absorb carbon dioxide (CO₂) from the atmosphere which is mostly stored in sediment. Mangroves are a good habitat for aquatic biota such as macrozoobenthos. Macrozoobenthos are organisms that inhabit the bottom of sea waters and also exist in stable sediments. The aim of this research is to determine sediment texture, sediment organic carbon content, macrozoobenthos abundance and the relationship between sediment type and macrozoobenthos abundance. The method used in sampling was purposive sampling with a total of 3 stations. Sediment samples were taken using a core sampler at depths of 0-10 cm, 10-20 cm and 20-30 cm, while macrozoobenthos samples were taken using the hand sorting method. Organic carbon content was analyzed using the Loss on Ignition (LOI) method. The research results showed that the macrozoobenthos community structure at all stations produced low diversity and dominance indices and high uniformity indices. The type of sediment texture in the research area shows an average value of the sediment fraction of 4.43% sand, 71.11% dust and 24.45% clay. The highest organic carbon content was found at stations near brackish water areas with an average of 12.06%, while stations near factory areas had the lowest content at 5.89%. There is a strong relationship between the type of sediment texture and the abundance of macrozoobenthos in the Karangtalun mangrove area, North Cilacap.

MARINE WATER POLLUTION INDEX: A CASE STUDY OF LABUHAN SANGORO WATERS, SALEH BAY, SUMBAWA REGENCY

2024-11-26T09:39:37+08:00

Saleh Bay is a region in West Nusa Tenggara Province known for its significant marine resource potential, on which most coastal communities rely for their livelihoods. One of the most important activities for these communities is seaweed cultivation. Besides supporting the local economy, this activity has also made West Nusa Tenggara one of the largest seaweed producers in Indonesia. However, declining water quality has led to a decrease in seaweed production. This issue has occurred in certain areas of Saleh Bay, such as Labuhan Sangoro. This decline commonly happens during specific seasons (the rainy season) and as a result of ice-ice disease. Monitoring water conditions is essential to provide a reference for seaweed farmers on the water quality in their cultivation areas. This study was conducted in February 2024, coinciding with the rainy season. Water sampling was carried out using purposive sampling at six stations, which were cultivation locations (sampling stations from the previous year). Measurements of seawater chemical and physical parameters were conducted in situ and at the Lombok Marine Aquaculture Center Laboratory. The data obtained from these measurements were then analyzed descriptively using the Pollution Index method based on the Indonesian Minister of Environment’s Decree No. 115 of 2003. The Pollution Index evaluation indicated that in February 2024, the waters of Labuhan Sangoro remained at a moderate pollution level (PI=6.1), with some stations showing parameter values exceeding the quality standards.

MOTIVATION AND INCOME CONTRIBUTION TO THE ECONOMIC INDEPENDENCE OF FISHERMAN WIVES IN GUDANG LELANG BANDAR LAMPUNG CITY

2024-12-04T11:16:07+08:00

ABSTRAK

Mayoritas penduduk wilayah pesisir Gudang Lelang Kota Bandar Lampung bermatapencaharian sebagai nelayan yang memiliki pendapatan rendah, tidak menentu, tergantung pada alam. Hal demikan, membuat istri nelayan termotivasi untuk berperan aktif dalam kegiatan produktif yang dapat membantu perekonomian keluarga. Tujuan penelitian ini yaitu menganalisis pengaruh motivasi dan kontribusi pendapatan terhadap kemandirian ekonomi istri nelayan. Penelitian ini merupakan penelitian eksplanatif, dengan pendekatan kuantitatif. Metode penelitian dengan menggunakan metode survei. Pengumpulan data menggunakan teknik purposive sampling dengan responden sebanyak 70 orang. Pengolahan data menggunakan analisis jalur (path analysis). Hasil penelitian menyatakan bahwa motivasi dan kontribusi pendapatan berpengaruh terhadap kemandirian ekonomi istri nelayan, baik secara langsung maupun tidak langsung. Informasi yang terkandung dari data penelitian sebanyak 66,28% dapat dijelaskan oleh model penelitian ini, sisanya dijelaskan variabel lain di luar model dan error.

IMPROVEMENT THE Ca-Mg MINERAL RATIO OF MEDIA CULTIVATION ON STRESS LEVELS IN FRESHWATER PRAWNS (MACROBRACHIUM ROSENBERGII)

2024-12-10T21:58:37+08:00

Freshwater prawns (Macrobrachium rosenbergii) are a freshwater species that is intensively cultivated. Calcium (Ca) and magnesium (Mg) are important factors in supporting the biological and physiological activities of freshwater prawns. The presence of minerals in the form of calcium and magnesium in the environment will be utilized by giant prawns, especially after the molting process. Calcium and magnesium important for the osmoregulation process and carapace formation of freshwater prawns. This research aims to see the best ratio of minerals in the form of calcium and magnesium to environmental stress in terms of the parameters of calcium and magnesium content in the prawns body, osmotic gradient, oxygen consumption level, and water quality during rearing. The experimental design used in this research was a completely randomized design (CRD) with five treatments and three replications. The treatment given consisted of increasing Ca-Mg in the media: A: 30 mg l-1 Ca + 0 mg l-1 Mg (1:0); B: 30 mg l-1 Ca + 15 mg l-1 Mg (1:0.5); C: 30 mg l-1 Ca + 30 mg l-1 Mg (1:1); D: 30 mg l-1 Ca + 45 mg l-1 Mg (1:1.5) and E: 30 mg l-1 Ca + 60 mg l-1 Mg (1:2). Based on the result, treatment C: 30 mg l-1 Ca + 30 mg l-1 Mg (1:1) can reduce osmotic gradient values, oxygen consumption levels and glucose levels.