Asian Journal of Fisheries and Aquatic Research
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Effects of Teifairia occidentalis and Vernonia amygdalina Supplements on Growth Performance of Clarias gariepinus Fingerlings
No full textThis study examined the growth-enhancing potential of Telfaira occidentalis and Vernonia amygdalina leaf powder in Clarias gariepinus culture. The experiment was conducted at Tiddo Fish Farm Makurdi. One thousand juvenile catfish were obtained from the farm’s hatchery and allocated to five treatment groups identified as Control (0% supplement inclusion), T1 (10% fluted pumpkin leaf powder inclusion), T2 (20% fluted pumpkin leaf powder inclusion), T3 (10% bitter leaf powder inclusion) and T4 (20% bitter leaf powder inclusion). The fish were fed thrice daily for 8 weeks and water changed daily, to determine growth parameters of fish and physico-chemical parameters of water. Results obtained show that after the treatment period, Mean Weight gain and Specific Growth Rate was not significantly different (p>0.05). However, Specific Growth Rate and Percentage Survival rate differed significantly (p<0.05), highest (7.9% and 100%) in T3 respectively. Water quality parameters such as pH, Dissolve Oxygen and Temperature were within the recommended range and not significantly affected. Both plant species feed inclusions were utilized by fish, which was observed to facilitate the growth and survival of the fish species, with high percentage survival. In conclusion, T3 inclusion levels showed better growth performance
Seasonal Variation of Physicochemical Properties in the Lower River Benue, Nigeria
No full textThe study investigates the impact of seasonal changes on water quality in the River Benue, Nigeria. Conducted over eighteen months from January 2020 to June 2021, the research focuses on three locations: Ibi, Lau, and Mayo-Ranewo. Key physicochemical parameters such as temperature, pH, turbidity, conductivity, Biochemical Oxygen Demand (BOD), hardness, dissolved oxygen (DO), fluoride, and nitrate were measured to assess water quality. The findings reveal significant seasonal variations in these parameters, influenced by rainfall patterns, land use, and anthropogenic activities. Temperature ranged from 25.56°C to 30.70°C, remaining within acceptable limits for tropical waters, supporting stable biological processes. However, turbidity levels exceeded recommended values, indicating the presence of suspended solids that could impair water quality and harm aquatic life. Total dissolved solids (TDS) and conductivity showed potential contamination risks, likely due to agricultural runoff and urban discharges. Dissolved oxygen (DO) levels were generally adequate, especially during the wet season, enhancing oxygen content through increased photosynthetic activity and water inflows. However, BOD spiked with rainfall, signalling organic pollution and potential eutrophication risks. Seasonal shifts in pH and water hardness reflected changes in runoff and photosynthesis, with values largely within acceptable ranges for aquatic life. Fluoride and nitrate concentrations increased in the wet season, primarily due to agricultural runoff, highlighting the influence of land-based activities on water quality
Evaluating the Impact of Black Soldier Fly (Hermetia illucens) Larvae Meal on Growth Efficiency and Feed Utilization in Rainbow Trout (Oncorhynchus mykiss) Juvenile
No full textAims: Black Soldier Fly (BSF) larvae meal is a promising alternative protein source in aquafeed, offering high nutritional value and essential amino acid profiles like fishmeal. Nepalese Rainbow trout (Oncorhynchus mykiss) farming currently relies on imported shrimp meal, presenting economic and ecological challenges. The focus of this research was to examines the potential of BSFL meal to replace the shrimp meal in trout feed.
Place and Duration of Study: Fisheries Research Station (FRS), Trishuli Nepal, between May 1 to August 7, 2023.
Methodology: A feeding trial was conducted using 750 healthy Rainbow trout (mean individual body weight 5.39±0.55 g) randomly divided into five experimental groups, each having three replicates. The control diet contained no BSFL meal (CON), while experimental diets replaced 25% (BSF25), 50% (BSF50), 75% (BSF75), and 100% (BSF100) of shrimp meal with BSFL meal. Fish were raised in flow-through raceway tanks (300L) and fed twice daily until satiation. The growth efficiency parameters were measured.
Results: The results demonstrated that diets with 25-50% BSFL meal substitution (B25, B50) significantly enhanced growth efficiency compared to the control, reflected in higher final body weight and weight gain, and improved feed conversion ratios (P<0.05). Conversely, higher replacement levels (75% and 100%) negatively impacted growth, possibly due to increased chitin content affecting digestibility. Statistical analysis confirmed the optimal BSFL inclusion range for growth efficiency, with specific growth rates peaking in the B50 group.
Conclusion: In conclusion, BSFL meal can effectively replace 25-50% of shrimp meal in rainbow trout feed, offering a viable and sustainable protein source for trout farming in Nepal. This substitution could reduce dependency on imported shrimp, promoting more sustainable practices
Coastal Environment Profile (CEP) Presentation and Training-Workshop for Barangay Mana, Malita, Davao Occidental, Philippines: Engaging Stakeholders and Establishing a Community-Based Mangrove Nursery
No full textThe Coastal Environmental Profile (CEP) Presentation and Training-Workshop for Brgy. Mana, Malita, Davao Occidental, aimed to engage local stakeholders and establish a community-based mangrove nursery. Objectives included presenting the CEP to Barangay Local Government Unit (BLGU) officials and stakeholders, conducting a training-workshop on CEP, and establishing a mangrove nursery. The methodology involved forming a project team, conducting an inception meeting, courtesy calls, signing MOAs, and organizing a project orientation. Implementation included presenting the CEP, conducting a training-workshop with BLGU-Mana officials, BVBSNHS, and local organizations, and establishing the nursery. Significant findings revealed that the CEP provided comprehensive data on the coastal environment, including socio-political landscape, natural resources, and economic activities. The training-workshop raised environmental awareness and equipped participants with knowledge for coastal resource management. The community-based mangrove nursery was established to support conservation efforts. The project successfully enhanced local stakeholders\u27 understanding and commitment to sustainable coastal development, highlighting the importance of collaborative and inclusive strategies in achieving environmental resilience
Correlation of Coral Reef Cover with Catch Results of Target Fish Species in Supiori Waters Papua, Indonesia
No full textCoral reefs are a habitat for aquatic resources to grow and reproduce to continue their survival. This research aims to analyze coral reef cover and the composition of fish caught in areas around coral reefs on Wandos Beach, Supiori Regency. This research uses a descriptive quantitative approach. Sampling was carried out at six stations with the criteria of station one, two. three and four are fishing areas, station five is a community residential area and station six is a tourist area. The research results found that coral reef cover for all stations was in the poor cover category, ranging from 0.14-0.27%, with the most coral species found being Acropora followed by Coelastrea aspera. The catch for all stations was 66 fish consisting of 10 species. The highest catch composition of aquatic resources was obtained at station five with the condition of coastal coral reefs near residential areas totaling 43 individuals (65.15%) and the lowest at stations one and six each with two individuals (3.03%) with the condition the station is a fishing area. The composition of catch species in coral reef areas is dominated by Siganus Sp fish. as many as 37 individuals (56.06%), Charanx ignobilis nine individuals (13.63%), Etelis carbunculus six individuals (9.09%), Leptoscarus vaigiensis five individuals (7.57%), Lutjanus monostigma, Balistapus undulatus and Sphyraena sphyraena respectively two individuals each (3.03%). Scomberomorus commerson, Lutjanus campechanus and Tylosurus crocodilus one individuals each (1.51%). Station five with coral reef conditions near residential areas provided the largest catch of rabbitfish (Siganus Sp.). The lack of coral cover has an impact on the decreasing availability of fish resources, so that conservation efforts and control of fisheries management that damages coral reef ecosystems are needed
Effects of Smoking and Sun Drying on the Carcass Quality of Oreochromis niloticus (Linnaeus, 1758)
No full textThe effect of smoking and sun-drying processing methods on the carcass quality of Oreochromis niloticus were studied to determine its proximate composition and organoleptic qualities. Totally 40 samples of fish were collected, of which 20 samples were smoked dried in a smoking kiln while the remaining 20 were sun-dried. The samples were analyzed using standard methods according to AOAC (2005). The organoleptic quality was assessed using a structured questionnaire based on Hedonic scale 10, 8, 6, 4, and 2 for excellent, very good, good, fair and poor, respectively using a panel of 12 randomly selected judges. The sensory parameters for rating were taste, aroma, texture, appearance, and general acceptability. Statistical analyses were performed using IBM SPSS statistics 20.0 software. Results obtained showed that crude protein (52.57 ±0.03) and lipid content (8.90 ± 0.01) were higher in sundried carcass than in smoked carcass, with 47.88± 0.02 and 8.31±0.01 for crude protein content and lipid content, respectively. Smoked carcass maintained higher organoleptic quality with a higher acceptability ratio of 4.80±0.12 compared to the sundried samples (3.00±0.29). Sun-drying gave an optimal retention of nutrient content while smoking enhanced the organoleptic quality of the fish. It is concluded that both methods are effective for the preservation of fish. Sun-drying is however recommended for nutritional retention while smoking remains the better choice for enhanced flavour and consumer preference
Egg Quality and Fecundity of Clarias gariepinus Broodstock Cultured at Different Water Depths in Indoor Concrete Tanks
No full textAims: To investigate the fecundity and egg quality of C. gariepinus broodstock raised at 0.50 m, 0.75 m and 1.0 m pond water depth.
Study Design: Treatments were assigned using complete randomized design.
Place and Duration of Study: Fish Farm Complex of the Akwa Ibom State University (AKSU), Nigeria.
Methodology: Nine female broodstock of C. gariepinus averaging 2.51 – 2.53 kg and 64.30 – 67.24 cm were raised for six months at 0.50 m, 0.75 m and 1.0 m pond water depth; referred to as treatments A, B and C, respectively Experimental fish were fed 42% crude protein commercial feed. The fecundity, relative fecundity, gonadosomatic index (GSI), egg weight and size were assessed.
Results: The results revealed that the egg quality significantly (P=.00) increased with the water depth of the broodstock culture tank. Egg weight and GSI values from treatment C (363.40±0.57 g and 14.40±0.01 %, respectively) were significantly (P = .007) higher than those of treatment A (267.30±0.06 g and 10.66± 0.06 %, respectively) but showed no significant difference with those of Treatment B (331.07±1.20; 13.09±0.04 %). The corresponding egg diameter (1.01±00; 1.08±0.03 and 1.21± 0.01g), fecundity and relative fecundity of broodstock also increased with pond water depth (P = .003): 182,120.0±503.67, 72.66±0.40 > 185,618.3± 745.98, 73.37±0.18 > 188, 967.1± 295.19, 74.89±0.18, respectively.
Conclusion: The water depth of the broodstock maintenance pond enhances fecundity and egg quality; it is better at 1.0 m depth for successful fry production. Broodstock may be maintained at lower pond water depths for growth purposes; prior to breeding
An Overview of Etymology of Freshwater Fish Fauna in Pakistan
No full textDespite extensive work on species descriptions and taxonomic revisions, the etymology of scientific names in ichthyology has been largely neglected in Pakistan, leaving the origins and meanings of fish names poorly understood. The main objective of this study was to make it easy for the students and researchers to remember the otherwise obliviate and hard-Latinized scientific names of species. The manuscript provides an understanding of roots, meanings, and, in many cases, the associated morphological characteristics helpful in the identification of species. The collection of fish samples has been a lifelong activity that has used multiple fishing methods like cast nets, gill nets, electrofisher, and scoop nets in accordance with the recommended standard techniques. Pakistan has three main zoo-geographical components of fish fauna: the Oriental, West Asian, and the High Asian, which show its affinities with other countries of Asia. For etymological analysis, online dictionaries, relevant archives, books, and published material have been consulted. The river systems and watersheds of neighboring countries of Pakistan have remained connected in the geological past, which has facilitated the dispersal and distribution of fish fauna in these countries. Moreover, in the post-Tethyan period and before the orogeny of the Himalayas, the watershed of Pakistan remained connected with the river systems of Central Asia and China. Consequently, Pakistan has, to a variable extent, a commonality of fish fauna with neighboring countries like India, Bangladesh, Nepal, and Bhutan in the East and North East and with Afghanistan in the West as well as with the Central Asian states and China. Pakistan also shares its Western Asian component of the fish fauna with Iran, especially in the province of Baluchistan, which is adjacent to Iran. This article, therefore, will not only be beneficial for students, field workers and fish biologists of Pakistan but will also be advantageous for the concerned in almost all countries of South Asia
Length-weight Relationships and Condition Factors of Three Commercially Important Fish Species from Roseires Reservoir, Blue Nile, Sudan
No full textThis study aimed to investigating the length-weight relationships and condition factors of three commercially important fish species in Roseires Reservoir on the Blue Nile, Sudan. A total number of 387 specimens of Labeo senegalensis, 285 of Alestes dentex, and 318 Oreochromis niloticus) were collected from four sampling sites on the Roseires Reservoir, using gillnets with varying mesh sizes (4, 8, 10, and 12 cm) from November 2015 to October 2016; The total and standard lengths of each fish were measured to the nearest 1.0 mm, using measuring board; the body weight was recorded to the nearest 1.0 gm, using a digital weighing balance, version FRUIT 2000B. The results showed that the three species exhibited negative allometric growth (b < 3) in all sites, except Labeo senegalensis in Wad El Mahi site which showed positive allometric growth (b’ value 3.182), and moderate to high correlation coefficient (r = 0.442 - 0.998) The condition factor displayed average values ranged from 1.963- 3.751 (Labeo senegalensis) to 2.080 - 3.287 (Alestes dentex) and 2.336 - 3.287 (Oreochromis niloticus), indicating good health conditions and wellbeing of the three species investigated in the study area. The results of this investigation provide baseline data and valuable information on the growth pattern and health status of three fish species in the Roseires reservoir and can used as a basis for effective management measures of the three fish species in the Reservoir
Optimizing Acclimatization for Channa punctatus in Different Laboratory Environments
No full textThe present study was conducted to investigate the optimized acclimatization process of Channa punctatus, a freshwater air breathing fish in varying laboratory conditions, using four different tanks setups – glass bottom, sand bottom, sand-soil mix and mud bottom. The study aimed to identify the optimal condition for survival and adaptability. Observation also included mortality rates, changes in pigmentation and behavioral anomalies. Results indicated that tank with mud bottom provided the best environment for acclimatization, highest survival rates and least stress indicators. These findings offered a valuable insight for laboratory studies and conservation efforts involving Channa punctatus under controlled conditions