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RESIDUE ANALYSIS IN VANNAMEI SHRIMP (Litopenaeus vannamei) AQUACULTURE IN TUBAN REGENCY
Full text linkFood safety is a crucial aspect of vannamei shrimp (Litopenaeus vannamei) aquaculture, particularly regarding the use of chemicals that may leave harmful residues. This study aims to analyze the compliance of chemical usage in vannamei shrimp farming in Tuban Regency with food safety standards. Data were collected through interviews with farmers and fish health analysts, as well as laboratory testing of shrimp samples from several pond locations. The analysis results showed that all samples from the tested sites were compliant, meaning they met the permitted residue limits. Therefore, it can be concluded that shrimp farming practices in this region have been carried out responsibly and in accordance with prevailing safety standards. This study may serve as a reference for the development of guidance and monitoring efforts toward sustainable shrimp farming in other regions
EFFECT OF MICROENCAPSULATED Lactobacillus sp. ON CATFISH (Pangasius hypophthalmus) INFECTED WITH Aeromonas sp.
Full text linkThe prevention of fish infections caused by Aeromonas sp. bacteria can be achieved using Lactobacillus sp. bacteria. This study aims to identify and analyse the effect of Lactobacillus sp. using the microencapsulation method to treat catfish infected with Aeromonas sp. The identification of Lactobacillus sp. bacteria was conducted through microbiological and molecular tests. After obtaining the test results, the research continued with the application of microencapsulation using the emulsion technique. The impact of this microencapsulation was evaluated on catfish through an experimental approach employing a completely randomised design (CRD), with 10 catfish tested in each experimental aquarium. The study included five treatments, designated as A, B, C, D, and E. Treatment A served as the control, without the administration of Lactobacillus. Treatment B involved the application of Lactobacillus without microencapsulation. Treatments C, D, and E utilised varying doses of Lactobacillus at 0.003, 0.005, and 0.007 g/L, respectively. Each treatment was conducted in triplicate. Microbiological and molecular testing identified encapsulated Lactobacillus sp., specifically Lactobacillus helveticus and Lactobacillus johnsonii. The results indicated that treatment D, comprising a dose of 0.005 g/L of Lactobacillus helveticus and Lactobacillus johnsonii, was the most effective in promoting the healing of catfish infected with Aeromonas hydrophila bacteria.Keywords: Completely randomized design, bacterial infection mitigation, probiotic bacteria, emulsion technique
WATER QUALITY ASSESSMENT ON THE COAST OF DESA MUSI, KECAMATAN GEROKGAK, BALI
Full text linkThe northern coast of Bali possesses significant natural resource potential, particularly in Desa Musi, Kecamatan Gerokgak, which serves as a site for fish and seaweed cultivation managed by the local communities. However, some of these aquaculture activities lack adequate wastewater management systems. This study aimed to evaluate the water quality along the coast of Desa Musi, Kecamatan Gerokgak, Bali. A quantitative descriptive approach was employed, with purposive sampling conducted at selected locations along the coastal area. The water quality parameters assessed included salinity, pH, temperature, phosphate, ammonia, lead, and cadmium concentrations. The findings revealed that the coastal waters of Desa Musi generally support marine biota. However, the concentrations of lead and cadmium exceed the threshold values stipulated by Kep-51/MenKLH/2004. These results underscore the need for regular water quality management and monitoring to ensure environmental sustainability and support the livelihoods of the local community.Keywords: Coastal ecosystems, environmental monitoring, heavy metals
LENGTH-WEIGHT RELATIONSHIP OF Trichopodus pectoralis IN THE SPEECTRA (SPECIAL AREA FOR CONSERVATION AND FISH REFUGIA) OF PATRA TANI FLOODPLAIN, PALEMBANG
Full text linkFloodplains are dynamic freshwater ecosystems characterized by significant ecological shifts between dry and rainy seasons. The snakeskin gourami (Trichopodus pectoralis), a resilient blackfish species, thrives in these extreme environments due to its specialized labyrinth breathing organ. However, its wild populations are declining, necessitating sustainable conservation strategies. This study evaluated the effectiveness of the special area for conservation and fish refugia (SPEECTRA) model, developed by BRPPUPP, in Patra Tani, Palembang. The SPEECTRA model leverages seasonal fish migration from rivers to floodplains during inundation, capturing fish in designated conservation ponds to facilitate spawning, protection, and production enhancement. Over a 30-day period at the Patra Tani Installation, purposive sampling was employed to collect T. pectoralis specimens. Growth patterns were analyzed using length-weight regression, and Fulton’s condition factor (Kn) was calculated. Results demonstrated that W=0.0108 L3.1076 with R2=0.9469. The growth pattern of the studied fish exhibited positive allometric characteristics, indicating that the population is likely in a favorable condition. This finding indicated the effectiveness of SPEECTRA as a fishery sanctuary, safeguarding key species such as T. pectoralis while mitigating anthropogenic pressures on aquatic ecosystems.Keywords: Aquatic organisms, sustainability, condition factor
INTERACTION OF STOCKING DENSITY AND DIFFERENT PLANT TYPES IN CULTIVATING SANGKURIANG CATFISH (Clarias gariepinus var. Sangkuriang) AQUAPONIC TECHNOLOGY
Full text linkThis study investigated the impact of varying stocking densities and plant species interactions within an aquaponic framework. Conducted over a 45-day period (August-October 2023) at the Experimental Farm of Tadulako University, Palu, Central Sulawesi, the research utilized juvenile Sangkuriang catfish (Clarias gariepinus var. Sangkuriang) as the focal organism. Employing a factorial design, with stocking densities 12, 20, and 28 fish per 40 liters of water and three distinct plant species (Ipomoea aquatica, Brassica rapa subsp. chinensis, and Lactuca sativa), the study aimed to elucidate optimal growth conditions. Key findings revealed that the stocking density of 12 fish per 40 liters of water, coupled with pakchoi plants, yielded the most significant growth enhancements. Specifically, this configuration demonstrated a specific growth rate of 6.66±0.7% and absolute weight growth of 14.06±1.0, along with a specific length growth rate of 2.10±0.6% and absolute length growth of 4.48±0.6%. Notably, water quality parameters remained within acceptable limits across all treatments, ensuring an environment conducive to catfish growth. In conclusion, this research underscores the critical role of stocking density and plant selection in optimizing aquaponic systems. The findings offer valuable insights into enhancing both fish and plant growth dynamics within integrated aquaponic frameworks. Keywords: Catfish farming, aquaponics, growth rate, survival rate
SPATIAL AND TEMPORAL PATTERNS OF FISHING USING PAYANG NETS IN STARING BAY, SOUTH KONAWE DISTRICT
Full text linkStaring Bay is a semi-open bay that has a relatively large potential for fishery resources, so it is widely used by fishermen in South Konawe Regency to carry out capture fisheries activities. One of the fishing gear operated by fishermen is payang fishing gear. This fishing gear is operated to catch small pelagic fish. The purpose of this study was to determine the spatial and temporal patterns of fishing with Payang fishing gear in the waters of Staring Bay, South Konawe Regency. The research was conducted from December to January 2022 in the waters of Staring Bay, South Konawe Regency. The analytical method consists of catch composition analysis, CPUE analysis, correlation and determination analysis. Based on the research results, it was found that the fish catch was directly proportional to the distance from the fishing area. The distance of the fishing area that is far from land is 5.50 miles with a catch of 450.00 kg/trip, while the distance of the fishing area that is close to land is 3.35 miles with a catch of 82.50 kg/trip. Apart from that, fishing time also influences catch results, where the highest catch occurs in January reaching 211.91 kg/trip and the lowest catch occurs in December reaching 12.66 kg/trip.Keywords: Payang catch, spatial and temporal patterns, Staring Ba
ANALYSIS OF THE SUSTAINABILITY OF THE UTILIZATION OF THREADFIN BREAM (Nemipterus sp.) LANDED AT LEMPASING FISHING PORT, BANDAR LAMPUNG
Full text linkThe waters of Lampung Bay have high potential resources for threadfin bream (Nemipterus sp.). This fish has significant economic value as a diverse food ingredient. However, currently, the body size of threadfin bream found tends to be uniform and even smaller due to continuous overfishing. The research was conducted to assess the status of utilization of threadfin bream resources in the waters of Lampung Bay based on five important aspects, namely ecology, economics, social, technological and institutional. The research was carried out in May 2023 at Lempasing Fishing Port, Bandar Lampung City, with data collection through observation and interviews. Data analysis used the multi-dimensional scaling (MDS) method using the Rapfish (rapid appraisal for fisheries) application to evaluate the sustainability of the use of threadfin bream. The results of the analysis show that the sustainability index value for the use of threadfin bream in the waters of Lampung Bay is as follows: ecological dimension 48.59; economic dimension 36.80; social dimension 75.00; technology dimension 49.91; and ethical dimension 61.64. Based on these results, it can be concluded that the use of threadfin bream in the waters of Lampung Bay is quite sustainable, with an average index value of 54.39.Keywords: Ecological dimension, multi-dimensional scaling, Rapfish, sustainability index
PHYSICAL FEASIBILITY OF HYDRO-OCEANOGRAPHY FOR MARINE CULTURE WITH FLOATING NET CAGES ON THE EAST COAST OF PANGANDARAN
Full text linkThis study aimed to analyze the physical feasibility of hydro-oceanography for marine culture business locations with floating net cages in the east coast area of Pangandaran, West Java. The method used in this study was a case study method with secondary data collected from satellite images and publication results. The results of this study showed that the location of the marine culture business with floating net cages on the east coast of Pangandaran is physically feasible for the cultivation of several commodities. Standard parameters for grouper culti-vation (Epinephelus sp.) are as follows: temperature 25-33 °C, salinity 20-35 ppt, pH 6.5-8.9, DO >4 mg/l, and ocean currents 10-75 cm/s. Standard parame-ters for lobster cultivation (Nephropi-dae) are conditionally: temperature 25-32 °C, salinity 25-37 ppt, pH 7.5-8.5, DO >4 mg/l, and ocean currents 5-100 cm/s. Standard aquatic parameters for barramundi cultivation (Lates calcarifer) are conditionally: temperature 26-32 °C, salinity 15-35 ppt, pH 7-8.5, DO >4 mg/l. Hydro-oceanographic parameter data from field measurements showed: temperature 27-30 °C, salinity 33-34 ppt, pH 7-8, DO 5.55-6.5 mg/l, and currents <100 cm/s. This means that hydro-oceanographic parameters for the marine culture on the East Coast of Pangandaran for lobster, grouper, and barramundi commodities are within the feasible category. Keywords: Lobster culture, ocean data view, water qualty
STUDY OF WATER QUALITY AND POLLUTION LEVEL AT KETAPANG BEACH, PESAWARAN REGENCY, LAMPUNG
Full text linkKetapang Beach, situated in Pesawaran Regency, Lampung, is a well-known tourist spot frequented by many visitors. The beach features a pier and a boat lane used for transporting tourists to nearby islands. Additionally, the surrounding area is home to residential communities and small-scale fish farming. Despite this activity, a comprehensive analysis of the beach’s water conditions had not been conducted previously, and there is limited information available on its water quality and pollution levels. Given the extensive human activity, it is crucial to monitor the water quality regularly, as these activities can significantly impact the ecosystem. This study collected data on several physical, chemical, and biological water parameters, such as temperature, total suspended solids (TSS), pH, salinity, dissolved oxygen, biochemical oxygen demand (BOD5), ammonia, nitrite, orthophosphate, lead (Pb), and total coliform bacteria. These parameters were measured to evaluate the water quality using the Pollution Index (IP), with reference to the seawater quality standards for marine tourism and aquatic life. The findings revealed that several parameters—such as salinity, dissolved oxygen, BOD5, ammonia, orthophosphate, and lead (Pb)—exceeded the recommended thresholds. Based on the Pollution Index assessment, the waters at Ketapang Beach were classified as moderately polluted.Keywords: Ammonia, pollution index, purposive sampling, water pollution
ANALYSIS OF THE TROPHIC STATUS OF THE BABON RIVER, SEMARANG
Full text linkThe Babon River watershed, located in Semarang, Central Java, is an important resource for the local community in their daily activities. Effective river management is essential to maintain the surrounding ecosystem. This research aimed to provide information on the trophic status and water quality of the Babon River. Sampling was conducted in November 2021 and January 2022 using a purposive sampling method. The trophic state index (TSI) was used to assess water fertility, with measurements focusing on variables such as brightness, total phosphate, and chlorophyll-a. Additional parameters supporting water quality assessment included nitrate, dissolved oxygen (DO), pH, discharge, current velocity, and water temperature. The results indicated that the parameters measured were still within the standards for class II and III river water quality as outlined in Government Regulation (PP) No. 22 of 2021. Multiple linear regression analysis revealed non-simultaneous effects of nutrients (nitrate and total phosphate) on chlorophyll-a content, with a determination value of 21.3%. This suggests that low nutrient levels influence the presence of chlorophyll-a in the waters, while the remaining 78.7% of chlorophyll-a variability is attributed to other factors.Keywords: Babon River, chlorophyll-a, nitrate, trophic state index, total phosphate