Asian Journal of Fisheries and Aquatic Research
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1022 research outputs found
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Optimizing Plankton Growth and Diversity in Biofloc Systems through Silica Supplementation
No full textBiofloc is a fish cultivation system that relies on a collection of microorganisms, such as bacteria, protozoa, and microalgae, that live in the form of flocs or clumps. This study aims to determine the effect of varying silica concentrations on plankton abundance and diversity index in biofloc systems. Conducted from February to March 2024, the research employed a Completely Randomized Design (CRD) method with four treatments (0 ppm, 15 ppm, 20 ppm, and 25 ppm) and three replications each. The parameters observed were phytoplankton abundance, zooplankton abundance, and diversity index. Observation of plankton abundance using a 10 x 10 magnification microscope using SRC (Sedgewick Rafter-counting Cell) with a volume of 1 ml and diversity index using the Shannon Wierner method. The results of this research are that the addition of a silica concentration of 15 ppm is the best concentration with a phytoplankton abundance value of 450,729 cells/L, a zooplankton abundance of 827,778 cells/L and a diversity index of 2,662
Socio-Economic Study of Seaweed Production in Lontar Village, Tirtayasa District, Serang Regency, Indonesia
No full textThe amount of seaweed production in Lontar Village is decreasing every year so it is necessary to carry out an analysis to increase the amount of seaweed processing production in Lontar Village. The analysis used is a SWOT analysis for the direction of development of the seaweed processing business. The results of the IFAS and EFAS analysis of internal and external factors contain 5 factors. This research was conducted at the seaweed processing business in Lontar Village, Tirtayasa District, Serang Regency, carried out for 3 months, namely from October-December 2023. The research method used in the research was the case study method. The case study method examines a case in detail, the subject in individual, group, institutional and organizational case studies. The sampling technique uses a purposive sampling technique so that the data held can be more representative. The results of the prospective analysis show positive value profits for processing seaweed derivative products, the B/C Ratio value is more than 1, the production value and total revenue are above the Break Even Point value and the Payback Period value is quite right at 1. Dried seaweed processing shows positive value profits, the B/C Ratio value is more than 1, and the production value and total revenue are above the Break Even Point value and the Payback Period value is less than 1. Based on the results of this analysis, the seaweed processing business in Lontar Village is located in Kudran I, so the strategy is Appropriately applied to the seaweed processing business in Lontar Village is the S-O (Progressive) strategy
Effect of Administering Serially Diluted Suprecur and Motilium (Dopamine Blocker) on the Breeding Performance of Clarias gariepinus
No full textThis study was designed to determine the effect of using serially diluted Buserelin acetate (Suprecur), which is a luteinizing hormone-releasing hormone analogue (LHRHa) with dopamine antagonist (Motilium) on the latency period, fecundity, percentage fertilization and percentage hatching of Clarias gariepinus. Treatments administered include 50ug/l, 40ug/l, 20ug/l and 10ug/l of Suprecur in tandem with 5mg/kg of Motilium. Metrics obtained include egg numbers, latency period, fertilization rate, hatching rates, and survival to first feeding. The results obtained demonstrated that the use of Suprecur (LHRHa) together with dopamine antagonist (Motilium) successfully induced ovulation in the experimental Clarias gariepinus broodfish. The highest fecundity was from the treatment T40 There was no significant difference in egg weights stripped from each treated group. The application of 50 µg/kg of Suprecur with 5mg/kg of Motilium resulted in earlier synchronization of ovulation (Latency period; 12 hours). Results of the fertilization percentage indicated that an increase in the dose of LHRHa did not significantly affect the fertilization rate in treated groups of broodfish. Overall superiority of 50 µg/kg of Suprecur plus 5mg/kg of Motilium in spawning induction was proved by significantly high hatchability, 83.56%. Broodstock used for the 40µg/kg dose had the highest fecundity. There was no significant correlation (p>0.05) between the water quality parameters and the breeding parameters. In conclusion, the result obtained clearly indicates an overall superiority of using 50 µg/kg of Suprecur together with 5mg/kg of Motilium to induce spawning with regard to the recorded high hatchability percentage
Development of a Traceability System for Fresh Tuna Loin (Thunnus sp) Quality Based on Various Handling Temperatures at FPU XYZ Using Quick Response (QR) Codes
No full textThis study aims to: (1) identify the supply chain at FPU XYZ in Gorontalo City; (2) determine the quality of fresh tuna loin at each stage of the supply chain based on handling temperatures; (3) evaluate the validity of the QR Code during scanning; and (4) analyze the implementation of a QR Code-based traceability system for fresh tuna loin. The research methodology involved surveys and laboratory tests. Sampling was conducted using non-probability purposive sampling, with 19 respondents from a total population of 30, comprising fishermen, collectors, and FPU staff. Laboratory results were obtained using a completely randomized design and analyzed with ANOVA. The results indicate that: (1) the traceability of fresh tuna loin quality at FPU XYZ involves three supply chain stations: fishermen, collectors, and FPU; (2) laboratory test results on histamine content, Total Plate Count (TPC), and Salmonella based on different handling temperatures and samples across the supply chain meet the standards of SNI 2354.10:2016, SNI 2332.3:2015, and SNI 01-2332.2-2006; (3) information from laboratory tests formatted as QR Codes has been validated by expert validators and deemed valid based on three assessment aspects; (4) the traceability system for fresh tuna loin quality based on QR Code can be accessed anytime and anywhere
Analyses of Heavy Metals Bioaccumulation in the Organs of Clarias gariepinus Following Exposure to Sub-Lethal Concentrations of Waste Burnt Tire Residues
No full textThis study evaluated the bioaccumulation of certain heavy metals of waste burnt tire residues (WBTRs) in certain organs (viz-gills, liver, kidney and muscles) of Clarias gariepinus following exposure to sublethal concentrations (SLCs) of water-soluble fractions (WSFs) of WBTRs. Clarias gariepinus (average weight of 47.95±0.34g and length of 15.54±0.36cm) were exposed to SLCs at different concentrations (0.00, 0.23, 0.47, 0.94, 1.87, and3.74 ppm) of WSFs of WBTRs for a period of fifty-eight days. Heavy metal concentrations in WBTRs and in the organs of the experimental fish were measured using a handheld X-Ray Fluorescence Analyzer (NitonXL3T). Results showed that strontium, lead, zinc, cobalt, bismuth, rubidium, gold, tungsten, iron, thorium, arsenic, copper, and niobium were detected in WBTRs although the maximum level of zinc was perceived however, no significant difference (P>0.05) was observed as compared to the control group regarding heavy metal accumulation in muscles, 53.10±12.78; liver, 56.30±76.96; kidney, 164.54±12.78; and gills, 241.36±146.87 of the exposed fish. The high levels of heavy metals present in WBTRs are of great concern as potential detrimentl pollutants to the aquatic ecosystem. These allochthonous inputs get into the aquatic ecosystem through sewage flow and runoffs effluents. Resident non-target communities particularly fishes from such polluted aquatic systems with WBTRs become vunerable and incriminated with attendant high levels of heavy metals that could be detrimental to human consumers
Analysis of Factors Influencing Fresh Fish Consumer Satisfaction at Supermarket X, Bandung Regency
No full textThis research is entitled Analysis of Factors Influencing Fresh Fish Consumer Satisfaction in Supermarket X, Bandung Regency. The purpose of this research was to determine what factors influence consumer satisfaction with fresh fish at Supermarket X in Bandung Regency. Supermarket X is one of the largest supermarkets in Bandung Regency, which provides basic needs products such as food ingredients for cooking including the availability of fresh fish. Data was obtained through a questionnaire distributed to 104 Supermarket X customers for 1 month, from mid-April to mid-May. The type of research used is descriptive research using a quantitative approach. To determine the value of each attribute using IPA analysis (Importance Performance Analysis), The results of this research show, in calculations using IPA (Importance Performance Analysis) the consumer satisfaction factor is divided into two, namely satisfied and disssatisfied. Satisfactory attributes are product performance, reliability, durability, conformance, price affordability, price compatibility with quality, price compatibility with benefits, tangible services, reliability, responsiveness, assurance and certainty, empathy, additional costs incurred and strategic location. While the unsatisfactory attributes, namely, the affordability of prices and the superior quality of fresh fish, are still inferior to other supermarkets
Assessing Colouration in Ichthyology: Insights from the Melanophore Index Perspective
No full textFish colouration significantly influences various aspects of their biology, including communication, camouflage, and mate selection. Among the pigment cells responsible for generating colours, melanophores are particularly significant due to their ability to produce dark pigments called melanin. The Melanophore Index (MI) quantitatively evaluates melanophore density and distribution across different fish species. This comprehensive review delves into the significance of fish colouration, the biology of melanophores, methods for assessing MI, factors influencing MI variations, and the ecological and evolutionary implications of MI in fish populations. By synthesizing current research and highlighting gaps in knowledge, this review aims to provide a foundational understanding of assessing fish colouration through the lens of the Melanophore Index
Investigation of Potential Probiotic Bacterium (Bacillus subtilis CCI3) in the Formulated Diets on Immunity, Growth Performance and Nutritional Quality of Cyprinus carpio
No full textIn the present investigation Bacillus subtilis CCI3 was evaluated for use as a probiotic supplement in the feeds for the fingerlings of Cyprinus carpio. The outcome of supplement on the feed utilization efficiency, growth performance, and immune response was evaluated. Cyprinus carpio fingerlings (avg. wt. 27.75 ± 0.045 g) were fed feed supplement with 2 x 104 (feed BS1), 2 x 105 (feed BS2) and 2 x106 (feed BS3) Bacillus subtilis cells per 100g feed for 60 days @ 5 % of the body weight per day in two equal installments in triplicate treatments. The control diet (CC) was not supplemented with the Bacillus subtilis. All the feeds are isocaloric and isonitrogenous. Feed BS2 fed fishes showed better growth, significantly (p ≤ 0.05) higher protein efficiency ratio (PER), highest RNA: DNA ratio and a lower feed conversion ratio (FCR) than the other experimental feeds. Feed BS2 fed fishes also showed highest carcass protein and lipid than the others. Intestinal protease and α – amylase activity was observed significantly higher (p ≤ 0.05) in BS2 feed treated fishes and also significantly (p ≤ 0.05) greatest GPT and GOT values were observed in feed BS2 fed fishes but lowest in control (C). Highest TSP, albumin, globulin was observed in BS2 treated fishes after 60 days feeding trial. But lowest glucose level was observed in the same treatment. TEC, TLC, Hct and Hb values were highest in BS2 treated fishes. After feeding trial the specific and non-specific immunity levels and disease resistance of fish were also studied. NBT, antibody titer and serum bacterial activity were highest in diet BS2 fed fishes. After feeding trial the fishes were challenged for 10 days by bath exposure to Aeromonas sp. (A2) [105 CFU ml-1, 1hr. and after 7 days 107 CFU ml-1, 1hr]
Comparative Analysis of Morphometric and Meristic Characters in Oreochromis niloticus (Linnaeus, 1758), Nile Tilapia across Diverse Ecological Zones in Nigeria
No full textThe present study investigated the comparative analysis of morphometric and meristic characteristics in Oreochromis niloticus (Linnaeus, 1758) from six lakes in different ecological zones across Nigeria. A total of 347 samples were collected. Twenty-nine morphometric characters were measured to the nearest 0.01 cm using Vernier calipers and nine meristic characters were counted in all the collected individuals. The results of the univariate analysis of variance (ANOVA) revealed that all observed morphometric and meristic characters were significantly different (P=0.05) across the study sites. Notably, O. niloticus from Asejire Lake had significantly higher values in all the morphometric characters. The multivariate analysis of variance (MANOVA) identified three morphometric and four meristic characters as the most discriminating traits among the studied populations. These findings align with previous research highlighting the utility of morphometric and meristic data in delineating fish populations based on habitat differences and genetic compositions. Significant differences in head-related (head length), swimming-related (anal fin length and caudal peduncle length), and feeding-related (both left and right gill raker) measurements further underscored environmental influences on morphological variation. The study suggests that ecological factors such as food availability and environmental conditions contribute to the observed variations. This research provides valuable insights into the population dynamics and adaptation strategies of O. niloticus in diverse aquatic environments across Nigeri
Spatio Temporal Distribution of SST and Chlorophyll a in WPP 718 Waters during the West Season: A Case Study of Merauke Regency Waters, Indonesia
No full textSea surface temperature (SST) and chlorophyll-a are critical factors for determining oceanographic conditions in water bodies. This research aims to analyze the spatial and temporal distribution of these parameters in the waters of the Merauke region using remote sensing technology. Descriptive methods and remote sensing techniques were used to collect and analyze data from Aqua-MODIS satellite images from December 2022 to February 2023. The results indicate that the waters of Merauke Regency are fertile and warm, with the highest surface temperature recorded in December 2022 (25.0 - 30.0 Celsius). C) and the lowest in January 2023 (25.0 – 28.0 degrees Celsius). Chlorophyll-a concentrations peaked in December 2022 (0.26-5 mg/m3) and were lowest in February 2023 (0.2-2 mg/m3). These results provide valuable insights for fisheries management and environmental monitoring, aiding in the sustainable use of marine