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Dony Prasetyo
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INDONESIA
Indonesian Journal of Tropical Aquatic
Published by Universitas Muhammadiyah Malang
ISSN : -     EISSN : 26224836     DOI : -
Core Subject : Agriculture,
Agriculture, Biological Sciences & Forestry
Indonesian Journal of Tropical Aquatic (IJOTA) is open access publishes papers two times a year in February and Augst. IJOTA will publish the research results useful for the sustainability of fisheries. IJOTA is a scientific journal that discusses the results of research in science, technology, marine and freshwater fisheries that have not been published. Articles should be created in a language that is easily understood by non-specialist readers in the topic of the article itself, but interested in research. This scientific article includes the results of research on Aquaculture (Fish Nutrition, Fish Health and Diseases, Water Quality, Fish Genetics Improvement and Breeding, Fisheries Engineering and Biotechnology), Aquarium Sciences, Aquatic Ecology (Marine, Brackish, Freshwater), Conservation of Aquatic Resources and also Coastal Management. A journal script should be written in English.
Arjuna Subject : Ilmu Pertanian dan Biologi (Semua) - Ilmu Perairan
Articles 78 Documents
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Ammonia reduction by different thickness coral shard filter in cultivation of Catfish (Pangasius sp) Desi Maria Sabu; Ade Yulita Hesti Lukas; Yuliana Salosso
IJOTA (Indonesian Journal of Tropical Aquatic) Vol. 5 No. 2 (2022): August
Publisher : Universitas Muhammadiyah Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22219/ijota.v5i2.22835

Abstract

Catfish (Pangasius sp.) is a consumption fish that is quite popular and has a selling value. Fish have tolerance standards for water quantity and quality, so water as a living medium should be managed in aquaculture. One of the water quality parameters that affect the survival of cultured fish is ammonia (NH₃). Ammonia at high concentrations can adversely affect fish, such as reducing the ability of the blood to carry oxygen, damage to body tissues, fish susceptible to disease, inhibiting growth and death. This research aimed to determine the thickness of the coral shard filter, which effectively reduces ammonia (NH₃) in catfish culture. This research was conducted at the Dry Fisheries Laboratory, Faculty of Animal Husbandry, Fisheries and Marine Science, University of Nusa Cendana. The research started from February 2022 - April 2022. The implementation of this research used a Completely Randomized Design (CRD) with 4 treatments and 3 replications, namely: without coral shards filter (A), treatment using a coral shard filter with a thickness of 5 cm (B), coral shard filter with a thickness of 10 cm (C) and coral shard filter with a thickness of 15 cm (D). Results show that filter coral shards treatment with 5 cm thickness can reduce the concentration of ammonia in the cultivation of fish catfish from a score beginning research of 0.02 mg/L to 0.018 mg/L in the end research.
Performance of Biofloc with Different Carbon Sources on the Growth of Catfish (Pangasius sp.) Christina Virginia Nince; Ade Yulita Hesti Lukas; Wesly Pasaribu
IJOTA (Indonesian Journal of Tropical Aquatic) Vol. 5 No. 2 (2022): August
Publisher : Universitas Muhammadiyah Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22219/ijota.v5i2.23700

Abstract

The purpose of this study was to determine differences in carbon sources on the growth of catfish (Pangasius sp). The research design used was a completely randomized design (CRD) with 3 treatments and 3 replications. The treatments used were tapioca flour, corn starch, and wheat flour with a dose of 2 g/l carbon source water, 0.01 ml/l probiotics, and 3 g/l salts. The research variables observed were the growth pattern of catfish (Pangasius sp), the number of floc volumes, and water quality. The results showed that the performance of bioflocs with different carbon sources resulted in different daily growth patterns of catfish in each treatment, where the highest daily growth pattern was in the 60th-day tapioca flour treatment reaching 1.96%/day, corn starch treatment 1.57 %/day, and wheat flour treatment 1.74%/day. The results of water quality measurements for each treatment were still in the optimal range for the life and growth of catfish. Ammonia reduction in tapioca flour treatment was 0.57 mg/l, corn starch treatment was 0.36 mg/l, while in wheat flour treatment there was no reduction in ammonia due to low temperature at the end of the study so it interfered with bacterial metabolism in assimilating nitrogen can still be tolerated by catfish (Pangasius sp).
Measured Catch Blue swimming crab (Portunus pelagicus) Based on the Walter-Hilbron Non-Equilibrium Model) Bangkalan Madura Waters Siti Naviah; Samsul Huda; Dyah Arini
IJOTA (Indonesian Journal of Tropical Aquatic) Vol. 5 No. 2 (2022): August
Publisher : Universitas Muhammadiyah Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22219/ijota.v5i2.24292

Abstract

Blue swimming crab (Portunus pelagicus) as an export product relies mostly on catches, one of which is in Fishery Management Area 712, where this research was carried out. The frequency of fishing efforts continues to increase because of its high economic value; however, there is not much information about the resource as a basis for following up on Law Number 45 of 2009 concerning measurable fish catches based on control output. Descriptive research method with the aim of mapping crab resources based on the "Walter-Hilbron Non- Equilibrium Model" The results showed that the maximum catch production (CMSY) was 63,886.114 kg/year with standard Trammel net fishing gear, intrinsic growth was 50.91%/year, the carrying capacity of the waters was 50195,336 Kg/year, dominant species was Portunus pelagicus, Optimum effort (Eopt) 6363750 trip/year with a resource potential of 25097.668 kg/year. This information forms the basis for resource mapping in order to increase inclusive and sustainable economic growth.
FEASIBILITY STUDY BY MEANS OF CAPTURE FISHING IN UPT PURSE SEINE PORT AND MANAGEMENT OF MARINE AND FISHERY RESOURCES (P2SKP) TAMBAK Rejo, BLITAR, EAST JAVA Cucuk, Onky; Adhywirawan, Ganjar; Samsundari, Sri
IJOTA (Indonesian Journal of Tropical Aquatic) Vol. 6 No. 1 (2023): February
Publisher : Universitas Muhammadiyah Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22219/ijota.v6i1.6015

Abstract

This research was conducted for 30 days, ie from 15 January to 17 February 2018 at UPT Port and Management of Marine and Fishery Resources (P2SKP) Tambakrejo, Wonotirto District, Blitar Regency, East Java Province. The purpose of this research is to know the process of purse seine work and business feasibility by using purse seine fishing equipment in Tambakrejo Village and to know the efficiency of purse seine fishing equipment to the people's income in Tambakrejo village.The method used in this research is descriptive method with survey technique. As for the object of his own research is the owner of the ship purse seine in Tambakrejo Village. Methods of data collection using several techniques of observation techniques, interview techniques, and literature study techniques. The collected data was then analyzed to determine the feasibility of purse seine fishing effort in Tambakrejo village.The result of this research shows that purse seine fishing business is very feasible to run as seen from NPV value of 15348.15, Net B / C Ratio of 2.00, IRR of 242.10%, BEP production of 178.62 Kg, BEP price of 2,399,999,51 and Payback Period of 0.44, from the value can be concluded that fishing effort by using purse seine fishing equipment in Tambakrejo Village is very feasible to run.Therefore research is done to provide a source of information to fishermen and boat owners that fishing effort by using purse siene fishing equipment is feasible to run because it will increase the economic value of fishermen communities.
UTILIZATION OF DRY NOODLE WASTE AS SUBSTITUTION OF WHEAT FLOUR AGAINST GRWOTH AND FEED EFFICIENCY ON TILAPIA (Oreochromis niloticus) Nurlaksana, Muchamad Nanafi; Sri, Samsundari; Zubaidah , Anis
IJOTA (Indonesian Journal of Tropical Aquatic) Vol. 6 No. 1 (2023): February
Publisher : Universitas Muhammadiyah Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22219/ijota.v6i1.6052

Abstract

Fish was one of the result waters consumed by many Indonesians. Tilapia (Oreochromis nilaticu) is one of the freshwater fishery products that people in demand, tilapia has a delicious taste, One of the factors that affect the growth of cultivated fish is feed. The cost of feed can reached 60-70% of production cost component. This research was conducted at Fisheries Laboratory of Faculty of Agriculture - Animal Husbandry University of Muhammadiyah Malang. The method used in this research is an experimental method using Completely Randomized Design. In the study there were 5 treatments with the addition of different dry noodle flour that is 0%, 25%, 50%, 75% and 100% and one treatment of noodle control use flour whear, each treatment was repeated four times. The pellet feed is administered adlibitum for 40 days. The main parameters used include the Specific Growth Rate (SGR), Total Feed Consumption (JKP) and Feed Efficiency (EP) were then analyzed using ANAVA and continued with BNT testThe results showed that the effect of Pellet form feeding was very significant (**) on Specific Growth Rate (SGR) Calculate 11.102> from F.Table 5% (3.11) 1% (5,03), and Feed Efficiency EP) F. Calculate 20.752> from F.Table 5% (3.11) 1% (5,03). The quality of tilapia in this study ranged from 25-27 0C, dissolved oxygen ranged from 5.2 to 6.7 and the pH ranges from 6.7 to 8.1.The conclusion of this study P5 treatment of 100% dried noodle flour additions is the best feed with the highest SGR 1.54% and the lowest 0.81.Key Words: Pellet-Formed Feed, Specific Growth Rate (SGR), Total Feed Consumption (JKP,) and Feed Efficiency (EP) Tilapia.
The Influence of Purslane Plant Extract (Portulaca oleracea) Against Molting Frequency And Giant Prawns Growth (Macrobrachium rosenbergii) Stadia Juvenile Roisy, Marits Alhan Urma Indra; Sri, Samsundari; Sutardjo3, Ganjar Adhywirawan
IJOTA (Indonesian Journal of Tropical Aquatic) Vol. 6 No. 1 (2023): February
Publisher : Universitas Muhammadiyah Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22219/ijota.v6i1.6405

Abstract

Galah prawns (Macrobrachium rosenbergii) are the largest freshwater shrimp with high economic value. However, the process of prawns cultivation (Macrobrachium rosenbergii) often encounters obstacles, especially on the ability of molting and slow growth rate. One of the factors that influence is the hormone ecdysterone in the body of the prawns (Macrobrachium rosenbergii). Efforts to improve molting and growth by adding oral hormone ecdysterone obtained from the extraction of purslane plants (Portulaca oleracea). Purslane plant (Portulaca oleracea) one of the plants containing ecdysterone with levels reaches 720 mg / l. The method used was experimental method, Completely Randomized Design (RAL) 6 treatment ie P1 (0 mg / g body weight), P2 (5 mg / g body weight), P3 (10 mg / g body weight), P4 (15 mg / g body weight), P5 (20 mg / g body weight), and P6 (25 mg / g body weight) and 3 replications. Data were analyzed using diversity analysis (ANAVA), and if there were differences followed by BNT test. The results showed that the effect of giving of Krokot (Portulaca oleracea) extract on Molting Frequency and Gava Prawn Growth (Macrobrachium Rosenbergii) Stadia Juvenil had no significant effect on molting frequency where F. Calculate 2,7429 <from F.Table 5% (3.11) F . Table 1% (5.06) and growth F. Calculate Absolute Weight 0.3516 <of from F. Table 5% (3.11) F. Table 1% (5.06), and F. Calculate Length F. Calculate 1,918 <of from F. Table 5% (3.11) F. Table 1% (5.06). The water quality of giant prawns for 30 is temperature ranging from 24˚C-30˚C, dissolved oxygen 4,6-8,1 mg / l, and pH ranges from 8,4 to 9,0.
THE EFFECTS OF TIME INTERVAL DIFFERENCES ON FEED EFFICIENCY, FEED CONVERSION RATIO AND FEED CONSUMPTION ON GOURAMI FISH SEEDS (Osphronemus gourami) Sutardjo, Ganjar Adhywirawan; Faradilla, Navis Jihanatul; Haryadi, Haryadi
IJOTA (Indonesian Journal of Tropical Aquatic) Vol. 6 No. 1 (2023): February
Publisher : Universitas Muhammadiyah Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22219/ijota.v6i1.6688

Abstract

The main issues in gourami cultivation is the high need for feed. In order to reduce the high need for feed, a strategy that was applied is gastric emptying. This study aimed to find out the effective time for mastering gourami (Osphronemus gourami) and maximizing feed efficiency, minimizing feed conversion ratios, and minimizing the amount of feed consumption needed. This research was carried out by maintaining gourami in aquariums using 4 various times, one day get fed and one day off , two days get fed and one day off, three days get fed and one day off, and fed daily, each treatment was repeated 5 times. The method used in this study is an experimental method with a completely randomized design (CRD). Feed was given ad-satition method for 40 days. The main parameters used are feed efficiency, food conversion ratio (FCR), and number of feed consumption. Data on this study were analyzed by using variance analysis. The results showed that gastric emptying at different time intervals had no effect on feed efficiency, did not affect the food convergence ratio, and affected the amount of feed consumption followed by the smallest real difference test and it was found that P1 treatment had no significant effect, P2 treatment and P3 had significant effect, and P4 treatment really had a significant effect on treatment. Water temperature in this study ranged 26-28 ° C, and pH ranged from 7.9 to 8. Thus, the best amount of feed consumption is 73.60 grams in P3 (three days get fed and one day off), the best feed efficiency is in P3.
DIFFERENT USE OF PROBIOTICS ON THE GROWTH AND WATER QUALITY OF VANNAMEI SHRIMP (Litopenaeus vannamei) Guantoro, Achmad Hidayah; Handajani, Hany; Sutarjo, Ganjar Adhywirawan
IJOTA (Indonesian Journal of Tropical Aquatic) Vol. 6 No. 1 (2023): February
Publisher : Universitas Muhammadiyah Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22219/ijota.v6i1.18815

Abstract

Vannamei shrimp (Litopenaeus vannamei) cultivation in the last 5 years has become excellent. Water quality is a determining factor for the success of cultivation. The purpose of this study was to determine the effect of using different probiotics on the growth and water quality of vannamei shrimp ( Litopenaeus vannamei ). This research was conducted at UPT. BAPL Bangil and UPT. Labkeskanling Pasuruan was held on 29 June – 29 July 2021. This study used a completely randomized design with 4 treatments and 3 repetitions with a dose of Control, As-One (0.009%), GDM (0.09%), and Epicin-D (0 ,09%). The research results were analyzed using ANOVA. The data obtained from the variance was then further tested with the BNT test. Treatment 4 (Epicin-D) had the highest value (absolute weight 28.24 gr, absolute length 14.71 cm, specific growth 7.88 gr) and treatment 1 (control) had the lowest value (absolute weight 20.73 gr, absolute length 8.92 cm, specific growth 6.11 gr). The results of observations of water quality during the study were temperature 27.70 oC – 28.30 oC, pH 7.50 – 7.52, dissolved oxygen 5.44 mg/l – 5.50 mg/l, salinity 9.88 ppt – 9.94 ppt, Ammonia 0.25 mg/l, nitrite 0.91 mg/l, and nitrate 55.21 mg/l. TPC results for Treatment 1 (2.5 x 108 Cfu/ml and 2.9 x 109 Cfu/ml), Treatment 2 (2.5 x 108 Cfu/ml and 2.4 x 109 Cfu/ml), Treatment 3 (2.5 x 108 Cfu/ml and 8.9 x 108 Cfu/ml), and Treatment 4 (2.5 x 108 Cfu/ml and 2.9 x 109 Cfu/ml). Based on the results of this study, it can be concluded that the observed parameters (absolute weight growth, absolute length, and specific growth rate) were significantly different but vannamei shrimp survival was not significantly different.

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