Journal of Aquaculture and Fish Health
ISSN / EISSN : 2301-7309 / 2528-0864
Current Publisher: Universitas Airlangga (10.20473)
Total articles ≅ 129
Latest articles in this journal
Journal of Aquaculture and Fish Health, Volume 10, pp 56-65; doi:10.20473/jafh.v10i1.20794
Fish farming including freshwater crayfish still has a dependency on the availability of fish meal as the main source of protein in feed. The purpose of this study was to evaluate alternative protein sources including poultry by-products, feather meal, lupine flour, soybean meal and meat, and bone meal for smooth marron (Cherax cainii) freshwater crayfish feed. A total of 150 juvenile marrons (9.09 ± 0.21 g) were kept for 90 days and distributed into 15 rearing tanks consisting of five treatments with three replications. The results indicated that there was no significant difference in the increase in biomass, survival rate, moulting rate (weight), feed efficiency ratio, and feed digestibility (P> 0.05). However, marron juvenile fed with a protein source of poultry by-products meal had the highest specific growth rate (0.31 ± 0.05 g / day). In addition, marron fed with fish meal protein resulted a significant increase in carapace length (P 0.05). Overall, the results of this study indicate that the general growth performance of marron is not affected by the replacement of fish meal in the feed. Alternative protein materials can be used as a protein source to replace fish meal in marron feed so that the use of fish meal can be reduced.
Journal of Aquaculture and Fish Health, Volume 10, pp 46-55; doi:10.20473/jafh.v10i1.19922
Surabaya as the capital of East Java Province has a tourism attraction based on mangrove ecosystems namely Wonorejo Mangrove Ecotourism. Interest to the growth of loyalty to the destination depends on service quality, motivation, and destination image. Service quality as the heart of marketing and one of the concepts of loyalty success determines the sustainability of a tourist destination in the future. In addition, motivation is also considered as the main driver for traveling. However, this depends on destination image in the minds of tourists. The purpose of this study was to analyze the direct and indirect relationship between service quality and motivation towards destination loyalty, which is mediated by destination image. From 276 online and offline questionnaires distributed to local tourists who visited or visited the Wonorejo Mangrove Ecotourism in the past years, 182 questionnaires were filled in completely. Data analysis used WarpPLS to examine the relationship of influence between variables. The results showed that service quality and motivation had a positive and significant effect on destination loyalty directly or mediated by destination image. Destination loyalty can be effectively increased by encouraging visitor motivation supported by an increase in destination image because the value of the total influence was at the largest of 0.443.
Journal of Aquaculture and Fish Health, Volume 10, pp 101-108; doi:10.20473/jafh.v10i1.22566
Tilapia is euryhaline fish which is commonly cultivated in former shrimp ponds, and belongs to mouthbreeders. The purpose of this study was to determine the hatching success of Tilapia eggs outside the mother's mouth, which was carried out in the salinity medium added with bromelain and papain enzymes. The research method was factorial CRD with enzyme (factor A) and salinity (factor B), with three replications. The research was conducted at the Fish Cultivation laboratory of the Faculty of Fisheries and Marine Sciences, Brawijaya University in January-February 2020. The results showed that papain had more effect on hatchability (93.77%), while the salinity of 5 ppt was the salinity that produced the highest hatchability (93.89%). Moreover, the hatchability was also influenced by the interaction between the enzyme and salinity, namely papain enzyme with a salinity of 5 ppt (98.89%). Meanwhile, bromelain had more effect on the survival of larvae (87.86%), and the salinity that produced the highest survival rate was at 5 ppt (85.75%), but the interaction between enzyme and salinity did not have an effect on the survival of larvae.
Journal of Aquaculture and Fish Health, Volume 10, pp 25-33; doi:10.20473/jafh.v10i1.18397
Red tilapia (Oreochromis niloticus) is one of the famous fish cultures in the aquaculture industry, especially in Malaysia. The appearance of redness makes the fish more attractive for customers to buy. Product appearance is one of the big criteria that customers choose when they buy food. Bright color effects give high expectations for high quality, nutritious, and healthy food. Therefore, to achieve quality products it is necessary to research how to improve the color quality of tilapia as desired by customers. The purpose of this study was to identify the dietary effect of red paprika used to enhance the coloration of red tilapia. This study is an experimental quantitative study. Red tilapia used as an experimental material was obtained from Freshwater Hatchery, University Malaysia Terengganu. A descriptive analysis was used to analyze the data in this study. This study shows that giving red paprika has an effect on the length and weight of red tilapia, where the highest length and weight gained (1.79 cm and 12.37 g) given red paprika 2% and the lowest length and weight gained (0.63 cm and 2.5 g) which given 4% red paprika. The findings of this study found that only 2% of red paprika treatment showed different growth performance. The crude protein, lipid, and moisture composition of tilapia were also higher at 2% red paprika treatment. Meanwhile, the highest composition of ash is feed with 4% red paprika content. The result of this research showed that the caudal and dorsal either muscle or fin showed the highest color at the fish which fed with 8% red paprika. The finding also found that 8% red paprika containing diet feed for six weeks could improve the coloration of the red tilapia. Future studies suggest the use of Dunaliella salina microalgae which is one of the richest sources of carotenoids used as dyes in food.
Journal of Aquaculture and Fish Health, Volume 10, pp 117-126; doi:10.20473/jafh.v10i1.21835
Prevention of disease in tilapia seeds can be done by increasing non-specific defense systems by improving and supplementing the nutritional content of the feed. This study aims to determine the effect of adding Moringa leaf meal combined with probiotics to feed on the survival rate of tilapia seeds and the number of seed blood cells that have been infected with Aeromonas hydrophila. The method used was an experimental method using a Completely Randomized Design (CRD) with 5 treatments and 3 replications. Treatment A = addition of 4% moringa leaf meal + 6 ml / kg of probiotic feed + A. hydrophila injection; Treatment B = addition of 6% moringa leaf meal + 6 ml / kg of probiotic feed + A. hydrophila injection; Treatment C = addition of 8% moringa leaf meal + 6 ml / kg of probiotic feed + A. hydrophila injection; Treatment D = feed + probiotic 6 ml / kg of feed (positive control) + injection of A. hydrophila; Treatment E = feed + probiotic 6 ml / kg of feed (negative control) + injection of physiological solution. The results showed the addition of Moringa leaf meal combined with probiotics got the best results in treatment C with a survival value of 86.67%, hemoglobin levels of 2.3 g%, erythrocytes of 2.20 × 106 cells, leukocytes of 11.5 × 104 cells, and the total number of intestinal bacteria was 10.34 × 106 cfu / ml.
Journal of Aquaculture and Fish Health, Volume 10, pp 95-100; doi:10.20473/jafh.v10i1.22222
Marketing is the main problem felt by salt farmers in East Lombok Regency, especially during the harvest season, which has an impact on the conversion of the salt pond land to cultivation land. This research aims to: 1) identify salt marketing channels in East Lombok Regency, 2) develop salt marketing strategy in East Lombok Regency. This research uses qualitative methods and the data will be analyzed by SWOT analysis.Efficient salt marketing occurs when the marketing channels include producers (salt farmers)-cooperatives /micro, small and medium enterprises-consumers, because it can shorten marketing channels and-reduce operational costs. Marketing of salt in East Lombok Regency can be carried out with several strategies, namely: 1) Maximizing the role of cooperatives and micro, small and medium enterprises in salt marketing, 2) Improving the quality of human resources in managing the salt business, 3) Formulating regulations on salt trading, and 4) Providing production technology training to salt farmers and salt micro, small and medium enterprises.
Journal of Aquaculture and Fish Health, Volume 10, pp 9-16; doi:10.20473/jafh.v10i1.18234
Digestibility is food substances from feed consumption that are not excreted into the feces, and the difference between food substances consumed and those excreted in the feces is the amount of food that can be digested. Information about the digestibility value of food is very important as a basis in assessing the quality of food and designing fish feed rations.This research was conducted to determine the level of the feed digestibility in nirvana tilapia (Oreochromis niloticus) feed with a combination of fish meal and maggot flour. This research was conducted at the Hatchery Campus of BAPPL STP Serang, Banten from September-December 2019. This study used a Completely Randomized Design (CRD) with 5 treatments and 3 replications. There were 225 fish used in the testing with an average weight of 0.16 grams. The culture media used was a plastic container with a size of 60 x 41 x 34 cm. Feeding was carried out for 50 days, with a frequency of twice a day, and the dose of feeding was 3% of the biomass.The results showed the total digestibility parameter of feed, protein digestibility of feed and the highest protein retention in the treatment of 50% of the combination feeds , with the highest total digestibility value of 56.97 ± 3.41 and the lowest of 42.08 ± 0.42, the highest protein digestibility with a value of 87.33 ± 0.95and the lowest of 83.11 ± 1.30 and the highest protein retention with a value of 14.83 ± 0.22and the lowest of 11.69 ± 1.05.
Journal of Aquaculture and Fish Health, Volume 10, pp 85-94; doi:10.20473/jafh.v10i1.20876
Pangasius catfish is freshwater fish for consumption that can be cultivated through fish farming. In order to produce optimal profits, Pangasius catfish farming must pay attention to the use of inputs in the form of seeds, feed and electricity. The purpose of this study was to analyze the optimization of Pangasius catfish production in Tondo Lestari fish cultivator group, Pagersari Village, Tulungagung Regency. Data collection techniques were in the form of interviews, observation and documentation. The data analysis used was linear programming using the POM-QM for Windows 5 software tool. The Pangasius catfish farming activities of the Tondo Lestari fish cultivator group have been optimal because they resulted in a low production difference between factual and optimal conditons of 3,05 kg or a profit of Rp. 10,502. . The optimal production of Pangasius catfish in a pond size of 200 m2 was 3,173.21 kg and the optimal production in a pond size of 300 m2 was 4,839.83 kg. Therefore, it can be concluded that Pokdakan Tondo Lestari can take advantage of additional feed and electricity input by reducing the use of seed input by 1.487 heads to increase profits.
Journal of Aquaculture and Fish Health, Volume 10, pp 1-8; doi:10.20473/jafh.v10i1.17088
Euchema cottoni or Kappaphycus alvarezii is one type of seaweeds that is widely cultivated in Indonesia. Water pollution caused by the accumulation of Pb heavy metals will affect the seaweed to grow and develop. This study is aimed to determine the tannin levels in K. alvarezii and the relationship of Pb heavy metal pollution level with tannin levels in K. alvarezii in different waters. This study used an observational experiment, and samples were taken from two different locations with 4 stations in each. From each sample in both locations, K. alvarezii was taken and was then measured for the tannin levels, water quality, and heavy metals (Pb) in water and in K. alvarezii. The results were analyzed at the Laboratory of PT. Sucofindo and the Laboratory of Testing Service Unit, Airlangga University Surabaya. The data were analyzed using a statistical test in the form of a t-test to determine the differences in samples in both waters, and a C-square test was used to determine the relationship between PB and tannin levels in K. alvarezii. The results showed that the level of Pb heavy metal pollution in the two waters did not show a significant difference due to water quality which was quite similar in both locations. Moreover, the tannin content in K. alvarezii in Bluto waters (0.053±0.004%) was higher than that in Talango waters (0.020±0.009%). Meanwhile, a t-test showed a significant difference in seaweed tannins in both waters. The relationship between Pb heavy metal pollution and tannins of seaweed in Bluto and Talango waters was that they did not affect each other, and tannin concentration was more influenced by chemical oxygen demand (COD), salinity of both waters, and the cultivation methods used.
Journal of Aquaculture and Fish Health, Volume 10, pp 17-24; doi:10.20473/jafh.v10i1.18102
In intensive shrimp culture, oxygen consumption of shrimp is an important indicator that greatly affects the physiological condition of shrimp as a reared organism. The purpose of this study was to dynamically determine the oxygen consumption of shrimp in intensive culture as well as the variables of water quality and shrimp growth. This research was conducted with the concept of ex-post facto causal design in intensive aquaculture ponds during the shrimp cultivation period. During the shrimp culture period, the rate of oxygen consumption of shrimp is inversely related with the sigmodial average increase in shrimp body weight. Meanwhile, based on the simulation analysis with the dynamic modeling concept, it is shown that oxygen consumption was linear to the dynamics of average daily gain and inversely proportional with the increasing rate of shrimp biomass in the ponds. In addition, oxygen consumption rate of shrimp in intensive ponds had a close relationship with water salinity and total organic matter. In conclusion, dynamically, the fluctuation of oxygen consumption rate and average daily gain of shrimp in intensive culture are closely related to the stability of the water quality conditions on the shrimp habitat.