Asian Journal of Fisheries and Aquatic Research
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Bibliometric Analysis and Ecological Challenges in the Era of Climate Change for Seagrass Conservation Research in Indonesia
No full textSeagrass ecosystems in Indonesia provide essential ecological services, including carbon sequestration, marine biodiversity support, and coastal protection. However, these ecosystems face significant threats from human activities, climate change, and pollution. This study was conducted due to the lack of comprehensive analysis on seagrass conservation research trends in Indonesia, aiming to address this gap and provide insights that can enhance conservation strategies. This study utilizes bibliometric analysis to examine research trends in seagrass conservation in Indonesia from 2007 to 2024, identifying 118 publications with an annual growth rate of 18.53%. Key research topics include biodiversity conservation, seagrass roles in climate change mitigation, and the management of protected areas. This analysis highlights the need to address research gaps, such as limited studies on community-based conservation approaches and the impact of local policies on seagrass management. The findings indicate a growing awareness of seagrass functions, such as carbon storage and support for fisheries, but highlight ongoing challenges related to limited financial resources and public awareness. By applying bibliometric analysis, this study provides a crucial tool for evidence-based decision-making, enabling more targeted and effective conservation policies. Community perceptions and participation, especially through community-based conservation initiatives, are crucial for the success of seagrass conservation efforts. This study uniquely contributes to the field by offering a clear map of research trends and gaps, guiding future research and policy to more effectively address seagrass conservation challenges in Indonesia. The study emphasizes the need for adaptive management strategies and collaboration among stakeholders to overcome the challenges of seagrass conservation in Indonesia
Effect of Stocking Density on Growth Performance, Proximate Composition and Hematology of Anabas testudineus in Biofloc Culture System
No full textIn a biofloc fish culture system, this experiment assessed the effects of stocking densities of 200, 250, and 300 fish/m3 at treatments T1, T2, and T3, respectively, on the growth and production performances of Anabas testudineus. With a mean final weight of 121.64 ± 1.354 g, T1 produced the largest weight, followed by T2 (111.63 ± 0.552 g) and T3 (104.65 ± 0.602 g). In addition, the feed conversion ratio in T1 treatment (0.97 ± 0.011) was noticeably lower than T2 (1.36 ± 0.020) and T3 treatment (1.67 ± 0.116). Survival rate in T1 treatment (86.66%) was substantially greater than T2 (80.71%) and T3 treatments (74.81%). The comparative analysis of proximate composition has shown lower total microbial colony count, higher protein and fat content, and lower moisture and ash content in biofloc system. There was no significant difference (p > 0.05) found in water quality parameter. Significant difference found (p < 0.05) in DO among three treatments. Comparing T1 (1.77 ± 0.017) to T2 (1.46 ± 0.005) and T3 (1.16 ± 0.047), BCR in T1 were higher. There was no significant differences found in HDL, LDL, Triglycerides and cortisol among three treatments but significantly found in control of A. testudineus. The higher level of HDL found in T1 and lower in control, LDL level lower in T1 and higher in control, triglycerides were lower in T1 and higher in control, cortisol higher in control and lower in T1. It might be concluded that the comparatively lower stocking density provides enhanced production and also be suitable in order to maintain better water quality parameters in biofloc culture system. This density is appropriate for the nation\u27s biofloc culture of A. testudineus, as evidenced by the lowest production costs and maximum income seen in T1
Length-weight Relationship and Condition Factor of Clarias gariepinus, Mormyrus rume and Synodontis budgetti in Dadin Kowa Reservoir, Gombe State, Nigeria
No full textLength-weight relationship and condition factor of Clarias gariepinus, Mormyrus rume rume and Synodondis budgetti were carried out for a period of eighteen month, (October 2022 to March 2024) in Dadin Kowa Reservoir. A total of 189 specimens of C. gariepinus, 81 specimens of M. rume and 272 specimens of S. budgetti were purchased from the local fishermen as soon as they returned from their catch and were brought immediately to the laboratory for analysis. The objective of the study is to determine the physiological well-being of the fishes in Dadin-Kowa reservoir. The length weight relationship of these species were calculated using the equation: W = aLb. Condition factor were calculated using the formula, K= 100W/L3. Regression gained of value b shows the growth patterns of C. gariepinus as negative allometric growth and isometric growth with values ranging from 2.430908 to 3.203496. M. rume as negative allometric growth, isometric growth and positive allometric growth with values ranging from 0.155529 to 4.409502 and S budgetti as negative allometric growth, isometric growth and positive allometric growth with values ranging from 2.465982 to 4.174956. The condition factor of C. gariepinus ranges from 0.05-10.26, M. rume, 0.03- 9.61 and S. budgetti from 0.02- 6.67 indicating that some are in good physiological condition while others are not
Comparison of the Sensory Quality of Fresh and Steamed Organic Tilapia
No full textThis study aimed to evaluate the sensory attributes of steamed and fresh organic tilapia and determine the acceptability of both preparations among consumers. Fifty respondents, aged 15-60 years, participated in the sensory evaluation. The organic tilapia used in the study was of the GET ExCEL 2010 strain, harvested with an average weight of 60-100 grams after a four-month culture period. Both steamed and fresh tilapia were assessed for five sensory attributes: shininess of scales, color of eyes, color of gills, odor, and firmness. The sensory evaluation was conducted using a consumer preference test, and statistical analysis was performed using descriptive statistics and paired t-tests. The results indicated that both steamed and fresh tilapia were generally well-accepted, with no significant differences in sensory attributes between the two preparations (p-value > 0.05). Steamed tilapia scored higher in odor, with a mean of 8.0, "Like Very Much," while fresh tilapia received slightly lower scores in visual attributes such as shininess of scales and color of eyes. However, both forms maintained moderate acceptability in terms of odor and gill color, key indicators of freshness. The findings suggest that organic tilapia, regardless of preparation method, offers a consistent sensory experience, making it a versatile and appealing option for consumers. This study highlights the potential of organic tilapia as a sustainable and high-quality freshwater fish choice in the market
Assessing Worker Conditions and Addressing Challenges in Dry Fish Processing: A Case Study from Cox’s Bazar, Bangladesh
No full textThe research aimed to determine the conditions and issues affecting dry fish processing workers and the drying centers. The data was collected with questionnaires by semi-structured personal interviews and focus group discussions (FGDs) of respondents and analyzed the data from major sites Nazirartek, Chowfalldandi, Khurushkul, and Nunierchara at Cox’s Bazar Upazila; Thakurtala, Ghotibhanga, and Sonadia at Moheshkhali Upazila and Shaporirdip and Shamlapur at Teknaf Upazila. The majority of the workers were male ranging from 59.95%-76.09% with female participation ranging between 8.94%-18.12%, children 5.28%-13.37%, and Rohingya refugees 7.17%-22.78% cumulatively in Cox’s Bazar. Road networks, landing center accessibility, electrical connections, ice plant shortage, inadequate marketing and processing facilities, inefficient sanitation and hygiene practices, low wage levels, and extended labour hours were some of the limitations observed. Better infrastructure, improvement of processing facilities, wage improvements, health and safety measures, ensuring gender equity, and providing administrative support are the possible ways forward of these constraints. The study suggests government and policy interventions to improve socio-economic conditions and infrastructure
Interventions in Selection of Fish Feed Ingredients with Special Reference to Leaves and Water Plants: A Review
No full textEfforts in managing leafy materials and aquatic plants as fish feed are essential approaches in sustainable fish farming. The purpose of this article is to explore the potential utilization of leaves, aquatic plants, and the processing methods involved in turning them into supplementary fish feed. The writing methodology employed is a literature review, involving stages such as journal search, journal selection, journal analysis, and journal synthesis. Based on the review of several relevant journals, it is evident that various leaf species such as Taro (Colocasia esculenta L.), Gamal (Gliricidia sepium), Lamtoro (Leucaena leucocephala), Cassava (Manihot utilissima), Noni (Morinda citrifolia), Turi (Sesbania grandiflora L.), Kale (Ipomoea aquatica), Papaya (Carica Papaya), and aquatic plants like Lemna Minor, Water Hyacinth (Eichornia crassipes), Azolla microphylla can serve as references for supplementary feed with beneficial content for fish growth. The utilization of these plants is a judicious step as it can reduce commercial feed costs, provide stable feed availability throughout the year, and mitigate negative environmental impacts while enhancing water quality. Managing plants as fish feed is not only economically favorable but also a positive stride towards sustainable and environmentally friendly fish farming
Zootechnical Performance of Cyprinus carpio Fry in Unfertilized Ponds Fed a Local Feed Formulated with Musca domestica Larvae Flour
No full textObjective: this study on the effect of the level of incorporation of Musca domestica maggot flour on some zootechnical performances of Cyprinus carpio fry in unfertilized ponds.
Study design: The study took place at the Laboratory of Aquaculture and Demography of Fisheries Resources (LADRHa) in the Yabassi District, Nkam department, coastal region-Cameroon and duration 2 months.
Methodology: 375 Cyprinus carpio fry with an average weight of 1.73±0.13g were used. After reception and acclimatization for two days. Five food rations were formulated T0+ (coppens), T0- without maggot flour and three other food rations T25, T30 and T35 were formulated from the basic ration T0- by incorporating 25%, 30%, 35% maggot flour. The fry were distributed in 15 circular basins of 40L each and a diameter of 395mm in a completely redomized device and repeated three times, installed in an unfertilized pond of 200m2 fed by a water retention dam. Each happa contained 25 fry. The fry were fed manually, 02 times per day at 10% of their ichthyo biomass until the end of the experiment. Control fishing was carried out every fourteen days.
Results: The survival rate was significantly higher (p˂0.05) with the T0- treatment and low with the T35 treatment. The highest average weight was recorded with the T0+ treatment (coppens) and the lowest with the treatment containing 35% maggot meal. Daily weight gain was high with the T0+ (coppens) treatment and lower with T35. The specific growth rate was higher with the T0+ (coppens) treatment and lower with the T30 treatment. The consumption index was lower with the T0+ treatment (coppens) and higher with the T35 treatment.
Conclusion: It emerges from this study that the fry of Cyprinus carpio nouris fed feed containing 25% of Musca domestica maggot meal recorded higher zootechnical performances compared to those fed feed containing 30 and 35%
An Inclusion Effect of Amino-acid (Histidine) in the Carcass Quality and Mineral Profile of African Catfish Clarias Gariepinus (Burchell 1822)
No full text150 fingerlings of African catfish (Clarias gariepinus) with initial mean weight of ±5.1g was stocked in a glass aquaria and were fed to satiation for 156 days. Histidine was used as a supplement to determine the mineral and carcass quality of African Catfish (Clarias gariepinus) fingerlings at varying inclusion levels (0, 0.2%, 0.4%, 0.6% and 0.8%) representing D1 – D5 in a formulated diet of 40% crude protein.
The carcass proximate and mineral composition were significantly improved by histidine supplementation but, exhibited no definite pattern of inclination while, moisture decreased significantly with increased histidine level up to diet D5. The calcium composition were significant different (P<0.05) with values ranging between 41.0 and 87.6 mg/gDM
Monoculture and Mixed Culture of Pacific White Shrimp Litopenaeus vannamei and Tiger Shrimp Penaeus monodon in Biofloc System: A Comparative Study
No full textThe microbial modification method known as Biofloc Technology (BFT) has been used regularly in prawn culture operations lately. The primary component of BFT culture systems, microbial Biofloc, is responsible for improving water quality, supplementing natural nutrition, and encouraging the growth and welfare of grown prawns. An attempt has been made to investigate the effects of adding probiotics (Bacillus licheniformis and Lactobacillus rhamnosus) and the Biofloc system on water quality parameters and the performance of shrimp Litopenaeus vannamei and Penaeus monodon. Various external carbon sources, such as molasses and tapioca flour combinations, were used for the development of Bioflocs in the present study both under monoculture and mixed culture operations. Experimental diets comprising one control, one supplemented with probiotics and bioflocs (combinations of tapioca flour and molasses developed with varying external carbon sources), and both monoculture and mixed culture operations of Litopenaeus vannamei and Penaeus monodon were used in feeding trail experiments for about 120 days. Because mixtures of both Probiotics and Bioflocs were added, all the water quality indicators remained in optimal condition and provided resistance and protection against Candidate species of cultivation. Along with acting as a food supplement for prawns, intense mechanical aeration also promotes the microbial community\u27s breakdown of toxic nitrogen and other pollutants. Productivity rates increased dramatically as a result. Therefore, BFT is an effective pathogen replacement, preserves ideal water quality, and boosts the growth and survival of prawns from L. vannamei and P. monodon. Probiotics and Bioflocs are used in combination in this work to maintain good water quality metrics and P. monodon and L. vannamei growth performance
Studies on Seasonal Variation of Zooplankton Population in Elanthakulam, Palayamkottai, Tirunelveli District, India
No full textA study of the zooplankton population in Elanthakulam pond, Tirunelveli District, and the plankton samples were collected during the winter season (August 2017–October 2017). Seasonal changes in the pattern of the zooplankton population have been driven by a combination of abiotic and biotic factors. Hence, the present study was undertaken to assess the zooplankton population in the Elanthakulam pond. The results indicate that 10 species belonging to four genera were recorded during the period of study. Out of 10 species, 4 belonged to rotifers, 3 belonged to caldoserans, 2 belonged to copepods, and one species belonged to Ostracoda. The present study concludes that zooplankton were not at their maximum in the monsoon season because of unfavourable environmental conditions, and they also slightly declined in August and September and increased again in October