Asian Journal of Fisheries and Aquatic Research
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Income Analysis of Tuna Fish Meatball Business (Case Study at CV Olahan Berkah Sadayana in Karangpawitan District, Garut Regency)
No full textThis research aims to analyze the income from the sales of tuna meatball products by CV Olahan Berkah Sadayana. This research was conducted from March 2023 to May 2023 at CV Olahan Berkah Sadayana which is located in Karangpawitan District, Garut Regency. The research method is using case study research and data was taken with people who work in production and marketing staff. Quantitative data processing was carried out using Excel tools and then the data was analyzed using descriptive statistics to describe the data. Analysis of the data used in the analysis of income which includes analysis of total production costs, revenue, and analysis of profit. Tuna meatball products by CV Olahan Berkah Sadayana are available in several packages, there are 350 grams, 450 grams, and 550 grams. The results of the income analysis show that the total cost of producing tuna meatballs per year is IDR 1,988,395,500 which includes the fixed costs is IDR 21,679,500 and the variable costs are IDR 1,966,716,000, annual revenue of tuna meatball products is IDR. 2,310,000,000/year and the profitability is IDR 321,604,500/year. The profit received by CV Olahan Berkah Sadayana shows that the tuna meatball business is feasible to continue
Supplementation Effect of Dietary Carvacrol and Thymol Polyphenols from Oregano Origanum vulgare on Growth Performance and Health Condition of Pacific White Shrimp Litopenaeus vannamei
No full textTwo growth trials were conducted for 60-days using aquaria tanks (growth trial 1) and 50-days using commercial culture tank (growth trial 2) to assess the potential effect on using phytogenic feed additives (Regavit AquaTM, Ecopharm Hellas, Greece) containing thymol and carvacrol extracted from Oregano plant Origanum Vulgare (OP) by incorporating the OP powder into the diet formulation for trial 1 and top-dressing process of OP liquid for trial 2. The antimicrobial properties of carvacrol and thymol polyphenols were also determined by using minimum inhibitory concentration (MIC) analysis against Vibrio harveyi and Vibrio parahaemolyticus. From the aquaria tank (trial 1), the growth performance, including final average body weight (ABW), percentage weight gain (PWG) and thermal growth coefficient (TGC) of group of shrimp fed with OP were compared to the control treatment. Using top-dressing process (trial 2), the top coating process to the commercial diet enhance the growth performances of shrimp treated with OP compared to the control treatment. From, trial 1, there was clear evidence for elevated hemocyte activity and increased lysozyme in shrimp fed diets supplemented with OP compared to the control treatments. MIC analysis performed in the present study also revealed the ability of OP to inhibit the growth of bacteria at the concentration of 2 × 101 µg mL-1. The results indicate that the inclusion of OP up to 0.6% both in direct inclusion within the diet or using top-dressing process significantly increases the growth and non-specific immune in white shrimps L. vannamei
Effects of Different Ethanol Concentrations on the Morphometric Characteristics of Clarias gariepinus and Oreochromis niloticus
No full textThe effects of ethanol (90% and 95% concentration) preservation on the morphometric characteristics of Clarias gariepinus and Oreochromis niloticus were investigated. The morphometric characters observed were total length, standard length, head length, body depth, eye diameter, and total weight for the period of sixty-three (63) days. Samples were first euthanized before taking the morphometric characteristics after which the samples were individually preserved in separate bottles filled with respective concentrations (90% and 95%) for nine weeks (63 days). Morphometric characteristics of the samples were later measured at the end of the 63 days to determine any possible changes. The results indicated that varying degree of shrinkage was common in all the observed morphometric characters in both species even though they both reacted differently to different concentration of alcohol. The results also revealed that the percentage shrinkage in all measured morphometric characters was higher in C. gariepinus than in O. niloticus and higher in 95% concentration than in 90% concentration
Effect of Different Feeding Rates on Growth Performance and Survival Rate of Tilapia (Oreochromis niloticus L. 1758) Fingerlings Reared in Rectangular Hapas
No full textThe objective of the study was to determine the effect of feeding ration on the growth and survival of Oreochromis niloticus. Three experimental hapas (T1, T2 and T3) were studied for a total of 8 weeks. The hapas had a rectangular shape and the same size (0.0725 decimal). In each of the three experimental conditions, 420 fish/decimal were stocked. The fish were fed 8% of their body weight in T2 and 12% of their body weight in T3. In T1, the fish were reliant on food that occurred naturally in their environment. In T2 and T3, fishes were fed twice daily. The proximate composition of the experimental diet was as follows: 11% water, 30% protein, 6% fat, 10% ash, and 7% fiber. Throughout the trial period, it was determined that the range of water quality parameters (water temperature 28-32°C, dissolved oxygen 5.6-7.8 mg/l, and water pH 7.5-8.6) were suitable for Tilapia culture. The initial mean weight of Tilapia fry in each of the three treatments was 3g, and their final mean weight gain was 6.8±4.77 g for T1, 9.88±5.76 g for T2 and 19.2±9.9 g for T3, respectively. The average initial length for the three treatments was 5 cm, and the average final length gain was 8.2±6.15 cm, 9.86±7.36 cm, and 12.2±8.23 cm for T1, T2 and T3, respectively. The T3 group, which was fed at a rate of 12% of body weight, attained the highest length and weight, whereas the T1 group, with no supplemental nutrition revealed the least gain in terms of length and weight
Ichthyofauna in the Lomami National Park and Its Hinterlands, Democratic Republic of the Congo
No full textThis investigation deals with freshwater fish populations in thirteen sampling rivers of Lomami National Park (LNP) and its hinterlands. The study aimed to inventory the ichthyofauna in freshwater bodies of LNP and its hinterlands; determine fish species with high economic value according to preference by riparian communities; and assess the conservation status of fish species. Intensive fish sampling was conducted thirteen rivers of LNP and its hinterlands using gill nets with stretched mesh sizes of 9.5, 10, 12, 15 and 20 mm in 2016. A survey questionnaire was administered to fishermen in order to determine fish species with high economic value. A total of 2985 fish were caught in thirteen rivers belonging to 129 species, 54 genera, 20 families and 8 orders. The family of Mormyridae dominated in the fish collection with 30 species followed by family of Alestidae with 23 species. Clarias spp., Schilbe spp., Chrysichthys spp., Auchenoglanis occidentalis, Polypterus spp., Hydrocynus spp., Alestes spp., Parachana spp. and species of Mormyridae were recorded as fish species with high economic value. The majority of species was least concerned, but one was reported as endangered species (Nannothrissa sterwarti) and another vulnerable (Labeo rectipinnis). The analysis displayed that all rivers were diverse with a minimum observed in the Onema River. The probability of catching two individuals of different species in the same river was high in all rivers, but it was higher in the Amboko, Lodja, Lomami and Yalo Rivers (96%); and it was slightly low in the Onema River (73%). The Kruskal–Wallis result showed statistical differences among sampling rivers (P = 0.0000).
Our findings provided valuable information for the conservation and management of fish species in the freshwater of Lomami National Park and its hinterlands
Comparison of Fishery Products Packaging Methods
No full textThe purpose of packaging is to contain the product, protect it from harm, serve as its identity, improve performance, protect from outside influences, promote the use and marketing of the product, increase consumer appeal, serve as a means of information and advertising, and make the product easier to use. Because of it\u27s purpose and use of packaging, it is very important in the food processing industry. In general, packaging serves to protect the product from factors beyond its control that can accelerate the deterioration of the food it contains. In addition, packaging still has other equally important purposes, such as simplifying product distribution or control, and continues to play an important role as a means to disseminate information and promote the goods it contains
Potential Biodegradable Sticker Based on Carrageenaan and Chitosan with Addition of Lauric Acid: A Mini Review
No full textPlastic pollution is a significant problem with detrimental effects on the environment and human health. Conventional plastic stickers, widely used in various sectors, contribute to plastic waste accumulation and slow degradation. To address this issue, review has focused on developing biodegradable stickers made from natural polymers such as carrageenan and chitosan. Carrageenan, derived from red seaweed, forms gels and has potential as a biodegradable film due to its stability and high fiber content. Chitosan, derived from crustacean waste, is non-toxic and can act as a stabilizer, thickener, and protective layer in food products. However, chitosan alone has limitations in terms of brittleness and rigidity. Lauric acid, a medium-chain fatty acid found in coconut oil, can be added as a film-forming material to improve the mechanical properties and reduce water vapor permeability. Biodegradable films thickness, tensile strength & Percent elongation, and surface morphology play important roles in their quality characteristics. Biodegradable stickers made from lauric acid-based biodegradable films offer ink resistance, biodegradability, water resistance, and water solubility as key characteristics
Toxicity Evaluation of Dual Fungicide SAAF (Carbendazim 12% and Mancozeb 63%) through Physiological Markers in Oreochromis mossambicus
No full textThe study was designed to evaluate the acute toxicity induced by SAAF in freshwater fish, Oreochromis mossambicus. Fungicides are widely used for pest management and increase crop output. When used in excessive doses, they are also exceedingly dangerous to non-target organisms. The present investigation is about changes in biochemical parameters in Oreochromis mossambicus due to toxicity induced by the application of fungicides in paddy-cum-fish ecosystem in India. The SAAF fungicide, a mixture of carbendazim (12%) and mancozeb (63%) is used to combat fungal diseases such as sheath blight, sheath rot, blast, and leaf spot diseases of rice plants. The present research aimed to determine the toxicity and evaluate the effect of sublethal concentrations of SAAF on some biochemical, haematological, and histological parameters of Oreochromis mossambicus after 10, 20 and 30 days. Oreochromis mossambicus were exposed to different concentrations of SAAF (10.5 mg/lit, 11.5mg/lit and 12.5 mg/lit) respectively and LC50 was determined. LC50 for SAAF was detected to be 13.5mg/lit using SPSS Vs.21. After 30 days of exposure, the individuals exposed to toxicity were sacrificed and the parameters were checked in the treated fish. Among biochemical parameters, total glucose, cholesterol, stress-related enzymes AST and ALT showed a significant increase while total protein showed a substantial decrease, whereas among haematological parameters, Haemoglobin, RBC, and PCV had risen and WBC and MCV showed a marked decrease. The tissue necrosis was quite prominent in the gill, heart, liver, kidney, and muscle after 30 days of exposure to the fungicide
Assessing the Health Risks of Emerging Trace Elements in Fish, Bobo Croaker (Pseudotolithus elongatus) from Buguma Creek, Southern Nigeria
No full textThis study investigates the health risks associated with trace elements in Bobo Croaker (Pseudotolithus elongatus) from Buguma Creek, Southern Nigeria. Fish samples were conducted monthly from May to August 2023, and muscle tissues were analyzed for potential health risks posed by elevated levels of hazardous metals. Heavy metal concentrations of As, Fe, Zn, Pb, and Cd were analyzed using atomic absorption spectrophotometry (AAS). Cd was found in the EDIs of heavy metals in P. elongatus from three stations for adults and children, with minimal variation between stations. For adults, there were no significant discrepancies, but for children, there were substantial differences, especially at Stations 2 and 3. The EDI value for Zn varies significantly across all stations, with the highest value being recorded at Station 3. Fe showed notable differences between stations, while Cu and As had consistent EDI values. The study reveals potential health risks for both adults and children due to heavy metals, with Cd, Pb, and Zn exposure exceeding safe thresholds for both adults and children, while Pb and As have values below safe thresholds, indicating negligible cancer risk. The study calls for further evaluations and mitigation strategies, emphasizing the importance of sustainable practices and acceptable exposure limits, particularly at Stations 2 and 3, to protect vulnerable populations. HI values surpass 1 for both age groups, indicating potential health risks from trace elements in P. elongatus, particularly for Cadmium. The study highlights the potential health risks from trace elements in P. elongatus. It emphasizes the importance of sustainable practices and acceptable exposure limits, particularly at Stations 2 and 3, to protect vulnerable populations
Efficacy of Tannin Extract from Cape Gooseberry Root Physalis peruviana L. as Egg De-Adhesion Agent during Artificial Propagation of African Catfish Clarias gariepinus Burchell
No full textThe study assessed the best immersion period and concentrations of the Cape gooseberry root Physalis peruviana that can efficiently remove egg adhesiveness of Clarias gariepinus. One male and one female C. gariepinus brood stock weighing 1.0 kg and 1.3 kg respectively, were used for the experiment. Three different concentrations (0.5%, 1%, and 2%) of tannin extract from Cape gooseberry root were used. Tannic acid (0.75g) diluted in 1 litre of water was used as reference de-adhesion agent, while water was used as control. The fish eggs were rinsed with the solutions at different durations of 0.5, 1 and 2 minutes. Each concentration and rinsing time was recorded in triplicates. Data generated were subjected to Univariate Analysis of Variance Test, and third order Polynomial regression analysis was then used to determine the best concentration and immersion period that neutralizes adhesiveness in eggs of C. gariepinus. Results of the study showed that there were no significant differences (p≤0.05) in the non-adhesive eggs and hatching of eggs immersed in tannin extract from Cape gooseberry root and Tannic acid solution but significantly different from the control. Therefore, this study showed that tannin extract from Cape gooseberry root at 1% concentration and 1 minute immersion period is more efficient for egg adhesion and increase hatching in C. gariepinus