Asian Journal of Fisheries and Aquatic Research
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1022 research outputs found
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Histopathological Effect of Aqua Fix Supplementation on the Skeletal Muscle and Liver of Labeo rohita (Hamilton,1822) during Immunomodulation and Aeromoniasis
No full textThe impact of oral feeding diet (supplement) Aqua Fix was studied on the histopathological changes in skeletal muscles and liver of L.rohita during immunomodulation and aeromoniasis. Three groups (D,E,F) of six months old fish were employed; groups D and E were treated with Aqua Fix for 4 days, on day 5 fish of group E and F were infected with Aeromonas hydrophila @ 10-6CFU/fish(fish of group F were fed with normal diet for 4 days).Controls (group G) were untreated and uninfected. Histological examination of the skeletal muscle and liver tissues were carried out on selected days of experimentation (day 1 and day 4 of experiment). The stained sections were observed under microscope and histological changes were noted. Immunostimulated fish (group D) showed normal arrangement of muscle fibers and muscle bundles compared to other groups (E and F) of fish. Both the muscle fibers and muscle bundles were healthy as in controls (Group G). In infected group (untreated with Aqua Fix, group F), fragmentation of muscle fibers was noticed along with sarcoplasmic debris. Dermal lesions and moderate edema is noticed in necrotic muscle fibers. Liver in immunostimulated fish showed large, polygonal hepatocytes with distinct, round nuclei. Hepatic central vein and sinusoids were clearly visible. By day 1 of infection, liver exhibited necrosis of hepatocytes, pycnosis of hepatocyte nuclei, granulation and vacuolisation (group F). Dilation of hepatic vein and sinusoids were observed. Necrotic foci and haemorrhages were evident in the capillaries of liver and occurred more severely in group F compared to group E (treated with Aqua Fix and infected). The fish (group E) which received immunostimulant and infection showed moderate effect on liver suggesting that Aqua Fix supplementation ameliorate the ill effects of A. hydrophila, showing the positive influence of herbal immunostiomulant i.e, Aqua Fix in fresh water fish
Fisheries Research Based on Experimental Fishing Methods in the Coastal Area of Rembang Regency, Central Java, Indonesia
No full textRembang Regency coastal area is one of the central fishing production in Central Java Province. Various types of fishing gear are used by fishermen for fishing operations and are developed independently. Much research has been conducted in this area related to capture fisheries. This study aims to analyze the research development that uses experimental fishing methods. This study uses a systematic literature review method based on Published or Perish application tools. The results showed that 9 (nine) types of fishing gear were the object of research in the coastal area of Rembang Regency in 2013-2022. Experimental fishing methods have been carried out on 5 (five) types of fishing gear, namely small bottom trawl (arad), folding box traps (bubu lipat), longline (pancing rawai), squid jigging (pancing cumi), and gillnet (jaring insang). Experimental fishing research has been conducted on small bottom trawls, including towing speed and mesh size modification. Folding box traps were studied with escape gap and fishing time variables. Hooks and lines were studied with fish-hook materials and various bait variables. Gill net was studied with webbing modified. The results of this study provide knowledge of the potential for experimental fishing research that can be applied in the future, especially to understand fishing activities in the coastal areas of Rembang regency
Design and Construction of an Automated Solar-powered Aquaponic System for Teaching and Research Purposes Using Acrylic Glass
No full textThis research details the design and construction of an automated, solar-powered aquaponic system utilizing acrylic glass, aimed at providing a sustainable model for food production in Nigeria. The primary objectives were to design a functional system, evaluate the feasibility of acrylic glass as a construction material, and integrate automation and solar power for improved resource efficiency. Acrylic glass was selected for its transparency, durability, and insulating properties, while the automation system, built around an Arduino microcontroller, was designed to control key parameters such as water temperature and pH. Initial findings demonstrate the system\u27s ability to maintain stable environmental conditions and the potential for solar power to contribute significantly to energy needs. This system offers practical implications for farmers and entrepreneurs in Nigeria by providing a scalable and sustainable approach to urban and peri-urban agriculture, addressing challenges related to food, water, and energy security in the context of climate change. Future research will focus on long-term performance assessment of the acrylic glass, optimization for diverse plant species, and comprehensive resource efficiency analysis incorporating fish culture data, ultimately aiming to facilitate wider adoption of this smart agriculture model.
Fish Drying and Marketing Systems in Selected Areas of Bangladesh: A Comprehensive Study on Processing, Species Utilization and Socio-economic Impact
No full textFish drying is a traditional and vital method of fish preservation in Bangladesh, contributing significantly to the socio-economic conditions of coastal and inland communities. This study investigates the fish drying and marketing systems in selected areas of Bangladesh, focusing on the processing techniques, species utilized, and the socio-economic impact on local communities. The research was conducted in three drying yards (Nazirartek, Chalan Beel, and Kuliarchar) and three dried fish markets (Asadganj, Saidpur, and Massimpur) from January to December 2020. A total of 93 fish and shellfish species were identified for drying, with marine and freshwater species being processed through traditional sun-drying methods. The study highlights the importance of fish drying in providing livelihoods for thousands of people, particularly women, and its role in the national economy. However, challenges such as lack of modern technology, poor infrastructure, and contamination issues were identified. The paper concludes with recommendations for improving the quality, safety, and profitability of dried fish products through policy interventions, better infrastructure, and the adoption of modern drying techniques
Effect of Organophosphorous Pesticide Stress on Biochemical Parameters in Freshwater Fish Labeo rohita (Hamilton, 1822)
No full textBackground: India is an agrarian country with an agriculture-based economy. Agricultural practices increased crop yield, but indiscriminate use of agrochemicals creates problems like air, water, and soil pollution and affects non-target organisms like fish. Nowadays, organophosphorus pesticides have been widely used to control pests.
Aim: The main objective of this study was to investigate the acute effect of organophosphorus pesticides Profenofos and Chlorpyrifos on the biochemical content of protein and glycogen in the liver and kidney tissue of Labeo rohita (Hamilton).
Materials and Methods: The study was carried out with freshwater fish Labeo rohita (9.1±1.2 cm length & 7.2±1.2 g weight) exposed in sub-lethal concentrations (LC50/4 mg/L & LC50/2 mg/L) of organophosphorus pesticides Profenofos and Chlorpyrifos for an acute period of organophosphorus pesticides Profenofos and Chlorpyrifos for acute time period 48 hours and 96 hours. The physico-chemical analysis of water was carried out by following APHA methods. The biochemical content of protein and Glycogen in the tissue of the liver and kidney was determined.
Results: After acute exposure to Labeo rohita in Profenofos and Chlorpyrifos, the LC50 Value was determined 0.31mg/L & 0.53mg/L respectively. During acute treatment of pesticides, there were no changes shown in the control group. The amount of protein and glycogen content in the tissue of the liver and kidney gradually decreases in the treated group. This disrupts a normal metabolic pathway, which leads to an increase in the rate of mortality in the fish population.
Conclusion: The finding contributes to understanding the development of safer pesticide formulation and improved aquatic system management. The right amount and proper use of pesticides are very important to keep up the environment clean and maintain the ecosystem
The Effect of Polystyrene (Ps) Microplastic Exposure with Different Doses on the Growth and Survival of Rotifera (Brachionus sp.)
No full textAims: This study aimed to analyze the effect of exposure to polystyrene (PS) microplastics on the growth and survival of Rotifera (Brachionus sp.).
Study Design: Quantitative Experimental.
Place and Duration of Study: This study lasted for 20 days of Rotifera (Brachionus sp.) maintenance, starting from January 3-23, 2025 at the Fish Production and Reproduction Laboratory, checking the daily density of rotifera at the Fish Health Laboratory, and checking the abundance of microplastics at the Environmental Laboratory and Hydrobiology Laboratory, Department of Fisheries and Marine Sciences, Faculty of Agriculture, University of Mataram, Indonesia.
Methodology: This study used a completely randomized design (CRD) consisting of 4 treatments and three replications, so that 12 experimental units were obtained. The doses of microplastics used in this study were P1 (0 mg/L), P2 (0.5 mg/L), P3 (1 mg/L), and P4 (1.5 mg/L). At the same time, rotifers have an initial density of 10 ind/ml.
Results: The results of this study show that exposure to polystyrene microplastics has a significant effect on rotifera (Brachionus sp.), especially on the parameters of density, growth length, and accumulation of microplastics in the body. The higher the dose given, especially at a concentration of 1.5 mg/L, the greater the negative impact it causes. Although there was no real difference in the specific growth rate (SGR), a downward trend was observed. Since the water quality is in the optimal range, it can be concluded that the biological effects of microplastic exposure are not due to environmental factors. These findings indicate that microplastics are environmental stressors that can potentially interfere with the survival of microscopic organisms in waters.
Conclusion: Based on the study\u27s results, it can be concluded that exposure to polystyrene microplastics significantly influences the growth rate of rotiferas. The higher the concentration of microplastics given, the lower the daily specific growth rate of the rotifera. This suggests that microplastics inhibit the reproductive process and development of rotiferas, presumably due to physiological stress and disturbances in the digestive system due to foreign particles. The survival of rotifers decreases as the dose of microplastics increases
Himalayan Coldwater Fisheries in India: Status, Challenges and Opportunities
No full textThe exploitation of fishery resources in upland Himalayan regions mainly comes from capture fisheries. The fish production through culture practices is gaining momentum. At present, the total fish production from upland areas is about 3 % of the total inland fish production of India, which is very meagre to the total fish production. The cold water fishes adapted to Indian climatic conditions to live between 5°to 20°temperature. The high-altitude upland water of mountains and the spring water at low altitude in temperate regions remain cooler than the rest of the water body, supporting cold water fishery. These water bodies, comprising several hill streams, rapids, pools, lakes, and reservoirs, are abundantly found in the Himalayan region and in the Deccan plateau region of peninsular India. The aquaculture production potential of the cold water sector has not been exploited to its fullest extent. As far as cold-water fisheries are concerned, very few hill states like Kashmir valley, Himachal Pradesh, and other mountain regions of India are underexplored. The hill states are endowed with natural lakes and reservoirs that could be better utilized under culture-based capture fisheries program. An overview is presented on the cold water resources of India with reference to the cultivation of viable species in the hill region of India. Various initiatives have been taken to promote the cold water fishery by DCFR and various other government agencies, and entrepreneurs
Caulerpa sp. Seaweed Meal as a Nutrient-rich Supplement in Tilapia (Oreochromis niloticus) Diets
No full textThis study aims to analyze the effect of fish feed fortification using Caulerpa sp. seaweed flour on the growth and survival of cultured tilapia (O. niloticus). The research method used is an experimental method, using a completely randomized design (CRD) consisting of 4 treatments of fish feed fortification with Caulerpa sp. seaweed flour at different concentrations in tilapia (Oreochromis niloticus) cultivation with 3 replications, namely treatment P1 control (without the addition of Caulerpa sp. seaweed flour), P2 (Caulerpa sp. seaweed flour 4%), P3 (Caulerpa sp. seaweed flour 8%) and P4 (Caulerpa sp. seaweed flour 12%). This research was conducted in March-April 2025, at the Fish Seed Center, Mataram City Fisheries Service. Tilapia rearing was carried out for 50 days with the initial weight of the fish being 6.2g. The data obtained were analyzed using analysis of variance (ANOVA) with 95% confidence level and continued with Duncan\u27s further test. The research parameters were absolute weight, absolute length, specific growth rate (SGR), survival (SR) and water quality values. The results showed that fish feed fortification with different concentrations of Caulerpa sp. flour can affect absolute weight, absolute length, and specific growth rate, but did not affect the survival rate of tilapia fry. The treatment without Caulerpa sp. seaweed meal fortification is the best treatment because it can increase the absolute weight of tilapia by 14.60±1.41g, absolute length 3.53±0.20cm, SGR 2.57±0.22%/day and survival 96.66±5.77 with ad satiation feeding method. Meanwhile, the treatment with the addition of Caulerpa sp. flour at concentrations ranging from 4% to 12% resulted in an absolute weight gain of tilapia ranging from 9.23 g to 11.23 g, absolute length gain from 2.40 cm to 2.90 cm, specific growth rate (SGR) from 1.90%/day to 2.11%/day, and survival rate ranging from 93.33% to 100%
Blue Economy: Challenges and Contributions of the Fisheries and Aquaculture Sub-Sector in Boosting the Nigerian Economy
No full textThe concept of the blue economy encapsulates the sustainable use of ocean resources for economic growth, improved livelihoods, and job creation, while preserving the health of ocean ecosystems. Nigeria, with its vast aquatic resources, stands to benefit immensely from the blue economy, particularly through its fisheries and aquaculture sectors. Despite the recognized potential of Nigeria\u27s fisheries and aquaculture sectors, their contributions to the economy are below expectations. The country is yet to fully optimize its marine and inland water resources, resulting in continued dependence on fish imports to meet domestic consumption needs. This paper adopts a qualitative approach, drawing from a range of secondary data sources, including reports from the Food and Agriculture Organization (FAO), World Bank, and Nigerian Federal Ministry of Agriculture. Key data on fisheries and aquaculture production, employment, and trade were reviewed to assess the sector’s contribution to the Nigerian economy. Additionally, interviews with stakeholders in the fisheries and aquaculture sectors were conducted to identify challenges and potential solutions. Statistical data on fisheries production, trade, and environmental degradation were analyzed to provide a comprehensive view of the sector\u27s current status and future prospects. The results of the review showed that blue economy has many prospects in Nigeria. It also discusses challenges such as overfishing, environmental degradation, and policy constraints that hamper optimal performance. Recommendations are made for leveraging these sectors to promote sustainable development within the blue economy framework such as development of national plan of action for capture fisheries and aquaculture, strengthening regulatory framework among others
Effect of Guava (Psidium guajava) Leaves Flour on the Growth and Survival of Whiteleg Shrimp (Litopenaeus vannamei) Infected Vibrio parahaemolyticus
No full textAims: To evaluate the improvement of the immune system of vannamei shrimp with the addition of guava (Psidium guajava) leaves in feed infected with Vibrio parahaemolyticus bacteria.
Study Design: Quantitative Experimental.
Place and Duration of Study: This study was conducted over a period of 60 days, from January to March, at the Fish Health Laboratory, Aquaculture Study Program, University of Mataram, West Nusa Tenggara, Indonesia.
Methodology: The research was conducted for 60 days using the Completely Randomized Design (CRD) method consisting of 5 treatments and 3 replicates. Parameters observed included survival rate (SR), feed conversion ratio (FCR), specific weight and length growth, blood glucose levels, phagocytosis activity (AF), and water quality.
Results: The results showed that the addition of guava leaves flour had a significant effect on almost all parameters observed. The best treatment was obtained at a dose of 6% (P5) with the results of SR 94.67%, FCR 1.13, specific weight growth 1.37, specific length 4.37, glucose, phagocytosis activity 65%.
Conclusion: This study showed that the addition of 6% guava (Psidium guajava) leaves flour in feed had a significant effect on the growth and survival of whiteleg shrimp (Litopenaeus vannamei) infected with Vibrio parahaemolyticus