Asian Journal of Fisheries and Aquatic Research

This study aims to determine the growth of Striped Catfish fingerlings (Pangasianodon hypophthalmus) and using Fine Bubbles (FBs) application with various pressures in the aquaponic system. The study was conducted at the Laboratory of Aquaculture, Ciparanje, Faculty of Fisheries and Marine Sciences, Padjadjaran University from 18^th September to 18^th October 2019. The method used in this study was the experimental method using Completely Randomized Design (CRD) with four treatments and three replicates. Treatment A: Control (without FBs), Treatment B: FBs with pressure 4.5 atm, Treatment C: FBs with pressure 5 atm, and Treatment D: FBs with pressure 5.5 atm. This research used water spinach as biofilter. The measured parameters in this study were fish growth, plant productivity, and water quality which includes levels of temperature, dissolved oxygen, nitrate, ammonia and phosphate. The results showed that the highest fish specific growth rate in treatment D is 6.68 ± 0.43%/day with a survival rate of 100 ± 0.00%, the highest plant productivity, with a stem length of 115.03 cm, a weight of 62.75 g, and leaf growth of 30 strands. While the water quality parameters including temperature, dissolved oxygen concentrations ranged from 24.2-27°C, 7.72-7.94 mg / l, nitrate 0.243-0.602 mg /, ammonia 0.001-0.010 mg / l and  phosphate 0.147-0.229 mg / l respectively.

Aquaponic is a combination of aquaculture and hydroponic systems. To increase fish production, aquaponic system can be used as an option because it can increase fish production with high density in limited land and water. The problem that often occurs in fish farming with high or intensive stocking densities is a decrease in dissolved oxygen concentration due to high oxygen consumption requirements. Handling that can be done to maintain the availability of dissolved oxygen concentration is by adding aeration by using Fine Bubbles (FBs). This research was conducted in October - December 2019 at the Green House Ciparanje Land Aquaculture Area, Faculty of Fisheries and Marine Sciences, UNPAD. The purpose of this research is to increase the growth of striped catfish with optimal density using the application of Fine Bubbles (FBs) and to improve the water quality of rearing media and plant productivity in aquaponic system. The research method used is an experimental method with randomized block design (RBD) consisting of four treatments and three repetitions. The treatment in this study is the spread of 375 striped catfish/150L, 450 striped catfish/150L, 525 striped catfish/150L and 600 striped catfish/150L. The parameters observed included specific growth rate (SGR), feed conversion ratio (FCR), fish survival (SR), water quality and plant growth. During the research, two harvests of water spinach were harvested in one cycle of fish rearing. The results show that the use of aquaponic systems and the addition of aerated FBs can increase the stocking density of striped catfish fingerlings to 600 striped catfish/150 L, with a high fish survival rate of 98% at a specific growth rate of 4.41 g and a feed conversion ratio of 1.00 g. The results of water quality observations for pH and DO parameters still meet the requirements but for temperature and ammonia, it has exceeded the safe threshold based on SNI (2000). The result of observation of water spinach plants, that the highest productivity in both harvests was in treatment C (525 striped catfish/ 150 L) up to 197.44 g, final plant height 44.54-47.10 cm and for the number of final leaves ranging from 9-10 leaves.

Long jawed mackerel resources are resources that are open access and common resources. The activity of catch mackerel in Indramayu district is increasing every year. In 2018 total fish production was 8423 tons while in 2019 there were 9047 tons. The utilization of long jawed mackerel resources must be based on economic and biological aspects as well as planning a sustainable use of long jawed mackerel. This study aims to analyze the conditions, efforts, and actual production of bloating fishing activities that are sustainable and optimal in Indramayu, as well as providing input into the direction of appropriate input and output management in bloating fishing activities in Indramayu Regency. The study was conducted in December 2019 to January 2020. The method used in this study was a survey method using quantitative descriptive analysis. Sample included 100 patients (age range 15-65 years) with respondents were owner fishermen, crew members, and/or boat captains, respondents were fishing using payang and purse seine. The data analysis method used is Gordon Schaefer's bioeconomic analysis. The results of the study found that the recommended fishing effort was in Maximum Sustainable Yield (MSY) 100.061 trip conditions and total production of 9011 tons, Maximum Economic Yield (MEY) conditions 98.756 trips and total production of 9.009 tons, and Open Access (OA) conditions in 197.513 trips and total production of 4.638 tons. The condition of long jawed mackerel in Indramayu Regency has experienced biological overfishing and economical overfishing. The policy recommendation is a limited entry of 27.242 trips (MSY) to 28.547 trips (MEY). Presentation of the reduction in the number of payang and purse seine fishing gear fleets under the conditions of MSY was 58% and 91,3% while for the MEY conditions were 59% and 91,7%.

This study aims to analyze the aspects of technical, social, and economic typologies of skipjack fisheries at Nizam Zachman oceanic fishing port, Jakarta. This research expected to provide information for decision-making in formulating policies in skipjack fisheries activities, thus they remain sustainable—this research conducted at Nizam Zachman oceanic fishing port, Jakarta from August 2019 to February 2020. The method used in this research is the survey method by interviewing the respondent through questionnaires for 100 respondents. The sampling method was done randomly, and the data were analyzed by descriptive qualitative. The social typology shows the orientation of Nizam Zachman as an industrial ocean fishing port is for commercial purposes. The main productive age level of fishers ranges from 35-39 years (33%) and the last education is a primary school (46%). Regarding the work experience, 38% had been fisher between 16-20 years. The technical typology shows the fishing gear that operated to catch skipjack at Nizam Zachman are purse seine, longline, also carrier vessel. In general, 74% of the size fleets were in 100-200 GT and the length of trips in 1-2 months (48%). The fishing ground area is in 572, 711 and 712 FMA. The economic typology shows skipjack production/trip by purse seine was 54%, longline (1%) and carrier vessel (57%).

Background: In order to meet the soaring demand for food, there is need for increased food production in Nigeria. Integrated Rice-fish farming is a significant approach to increase food production that will provide social, economic and environmental benefits.

Aim: To describe the socio-economic characteristics of integrated rice-fish farmers and to ascertain the availability of rice-fish farming technologies in the study area.

Study Design: This was a cross-sectional study. 243 farmers were assessed for their socio-economic characteristics and the availability of rice-fish farming technologies in the study area.

Methodology: Primary data were obtained from the field using structured questionnaire. The questionnaire contained questions that address the objectives of the study. Farmers were asked to indicate the rice-fish farming technologies available in the area. Descriptive and inferential statistical tools were used in achieving the objectives of the study in the form of Frequency score, Mean and Percentages.

Results: The result indicated that the majority (68.0%) of the farmers were male while 32.0% were female. The mean age of the farmers was 47 years. The result also showed that 79.8% of the farmers were, 9.5% of the farmers were single, while 10.7% were widowed. The result indicated that majority of the farmers 53.5% attained secondary school certificate, 21.8% had primary education. The result revealed that stocking of carp fish (78.60%), use of pests and disease resistant varieties (74.07%), use of organic fertilizer (61.73%), followed by transplanting of rice seedlings (69.96%) and skills in harvesting of rice before fish(53.50%) were the technologies perceived by the farmers as being the most available in the area.

Conclusion: The majority (68.0%) of the farmers were male while 32.0% were female and the technology that was most available to the farmers was stocking of carp fish.

Recommendations: There is need to encourage more females to engage in farming because female participation will have a positive multiplier effect not only on the family but on the entire community. Federal, State governments and Extension organizations must ensure that farmers are assisted in the use of available technology. The Extension agents should mount more aggressive awareness campaign in the area to enable more farmers embrace the practice of rice- fish farming.