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Dony Prasetyo
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Kota malang,
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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 98 Documents
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The provision of lemongrass oil (Cimbopogon Cirates) with different concentrations as an anesthetic material against the survival rate of Black Ghost Fish (Apteronotus Albifrons) within 12 hours Dina Widya Ningrum; Hariyadi Hariyadi; Sri Samsundari
IJOTA (Indonesian Journal of Tropical Aquatic) Vol. 7 No. 1 (2024): February
Publisher : Universitas Muhammadiyah Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22219/ijota.v7i1.8940

Abstract

Transportation and handling processes in ornamental fish culture often cause stress that can reduce fish survival and quality. One method to minimize stress during handling and transportation is the application of anesthetic agents. Natural anesthetics are increasingly preferred because they are environmentally friendly and safer than synthetic chemicals. Lemongrass oil contains bioactive compounds with sedative properties and has potential as a natural anesthetic for ornamental fish. Therefore, this study aimed to evaluate the effect of lemongrass oil on anesthesia induction time, recovery time, and survival rate of black ghost fish. The study employed an experimental method using a Completely Randomized Design (CRD) consisting of five treatments and three replications. The treatments included different concentrations of lemongrass oil: 1 mL/L, 1.5 mL/L, 2 mL/L, 2.5 mL/L, and 3 mL/L, while the control treatment was conducted without anesthetic addition. Observed parameters included induction time, recovery time, survival rate, and water quality parameters such as temperature, dissolved oxygen (DO), and pH. The results showed that lemongrass oil significantly affected the anesthetic response and survival rate of black ghost fish. The fastest induction time was obtained at 3 mL/L with an average of 3.34 minutes, while the fastest recovery time was observed at 1 mL/L with an average of 5.34 minutes. The highest survival rate (80%) was achieved at 1 mL/L, whereas the lowest survival rate (20%) occurred at 3 mL/L. Water quality remained within suitable ranges during the study. These findings indicate that lemongrass oil at 1 mL/L is the most effective concentration as a natural anesthetic for black ghost fish.
Analysis of intensive cultivation productivity of Catfish in Kampung Lele, Kembang Village, Pacitan Regency, East Java Dzakiyah Nanda Pratiwi; David Hermawan; Budi Setyono; Ganjar Adhywirawan Sutarjo; Soni Andriawan
IJOTA (Indonesian Journal of Tropical Aquatic) Vol. 7 No. 2 (2024): August
Publisher : Universitas Muhammadiyah Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22219/ijota.v7i2.10386

Abstract

Catfish (Clarias gariepinus) farming is an important freshwater aquaculture activity that contributes to food supply and local economic development. The productivity and profitability of catfish culture are influenced by several factors, including seed quality, feed efficiency, land area, and water quality management. Therefore, this study aimed to analyze the productivity, profitability, and factors affecting catfish farming performance in Kembang Village, Pacitan Regency. The study employed a survey method by collecting primary and secondary data from catfish farmers through interviews, observations, and water quality measurements. Parameters analyzed included productivity based on land area and production cost, Feed Conversion Ratio (FCR), Return on Investment (ROI), Revenue Cost Ratio (R/C Ratio), Payback Period, Break Even Point (BEP), and water quality variables such as temperature, pH, dissolved oxygen (DO), nitrate, nitrite, and ammonia. Data were analyzed descriptively and economically to evaluate farming feasibility. The results showed that catfish farming in Kembang Village had an average productivity of 27 kg/m², with production costs reaching Rp.13,143 per kilogram of fish. The average FCR value was 1.02, indicating efficient feed utilization. The average ROI and R/C Ratio values were 14% and 1.38, respectively, demonstrating that the farming business was economically feasible. The average Payback Period was 8.20 production cycles (approximately 2.5 years). Water quality parameters generally remained within suitable ranges for catfish culture, although nitrite levels exceeded the recommended threshold. In conclusion, catfish farming in Kembang Village is economically viable, with productivity influenced mainly by seed quantity, feed management, land area, and water quality conditions.
Spatial distribution of Microplastic Abundance in Pateguran Estuary, Pasuruan, East Java, Indonesia Prastyo Hendro Dwi Cahyono; Hariyadi Hariyadi; Anis Zubaidah
IJOTA (Indonesian Journal of Tropical Aquatic) Vol. 7 No. 2 (2024): August
Publisher : Universitas Muhammadiyah Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22219/ijota.v7i2.12318

Abstract

Indonesia ranks 2 countries with a high level of plastic pollution. Plastic waste entering the Indonesian sea is estimated to reach 0.48-1.29 million metric tons/year. This microplastic is the result of the degradation of plastic waste and textile waste that decomposes to small size in a very long time . The river is the headwaters of various rivers and streams which have the potential to carry plastic particles . This makes it likely that the waters of the north sea are also polluted by microplastics, one of which is sourced from rivers . This research was conducted to find out how contaminated the northern sea waters by microplastics, especially estuary areas. The area sampled to be studied is one of the river estuaries in Pasuruan, at the Pasuruan river estuary which is then analyzed at the Laboratory of Fisheries, University of Muhammadiyah Malang . The results of the analysis found three types of microplastics, fiber, film, and fragments. Station 2 is the sampling area of the middle estuary area which results in the most abundance of microplastic abundance of 611111.1 particles/m3 . Microplastic types found were dominated by fiber types up to 55%. The most common microplastics found in the estuary waters of the Pateguran river are microplastics with sizes ranging from 1-333.3 µm . Based on FTIR results, it is suspected that there are microplastics derived from nylon or polyamide (PA) and polypropylene (PP) types.
Physiological response of Cakul Wader Fish (Puntius Binotatus) fed with Pumpkin Seed flour (Cucurbita Moschata Durch) feed Rivaldy Rama Budiman; Hany Handajani; Dony Prasetyo
IJOTA (Indonesian Journal of Tropical Aquatic) Vol. 7 No. 2 (2024): August
Publisher : Universitas Muhammadiyah Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22219/ijota.v7i2.12356

Abstract

The physiological condition and reproductive performance of fish are strongly influenced by feed quality and nutritional supplementation. Yellow pumpkin seed flour (*TBLK*) contains various nutrients and bioactive compounds that potentially improve fish physiological responses, growth, and reproductive development. Therefore, this study aimed to evaluate the effect of TBLK supplementation in feed on the physiological responses of cakul wader fish, including the Hepatosomatic Index (HSI), Viscerosomatic Index (VSI), Gonad Maturity Index (GMI), and survival rate. This study employed an experimental method using a Completely Randomized Design (CRD) with four treatments and three replications. The treatments consisted of commercial feed without supplementation (control), commercial feed supplemented with 2.5% TBLK, 5% TBLK, and 7.5% TBLK, each combined with 3% CMC as a binder. Fish with an average body weight of 4.9 ± 1.0 g were stocked at 25 fish per aquarium containing 25 L of water and reared for 40 days. Feeding was conducted twice daily using paste-form feed. The results showed that TBLK supplementation affected the physiological responses of cakul wader fish. The best performance was obtained at the 5% TBLK supplementation level, which produced the highest Gonad Maturity Index (0–5.81%) and survival rate (86.67%), while maintaining favorable HSI (1.29–1.93%) and VSI (2.44–3.93%) values. Lower survival rates were observed in the 2.5% (68%) and 7.5% (66.67%) treatments. In conclusion, supplementation of 5% TBLK in feed was the optimal dose for improving physiological condition, gonad maturation, and survival rate of cakul wader fish
Effectiveness of Moringa Leaf (Moringa Oleifera) extract supplementation in feed on accelerating gonad maturation of Giant Freshwater Prawn (Macrobrachium Rosenbergii De Man) Hendra Adi Setiawan; Ganjar Adhywirawan Sutarjo; Dony Prasetyo
IJOTA (Indonesian Journal of Tropical Aquatic) Vol. 7 No. 1 (2024): February
Publisher : Universitas Muhammadiyah Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22219/ijota.v7i1.12435

Abstract

The reproductive performance of giant freshwater prawn (Macrobrachium rosenbergii) is an important factor determining the success of aquaculture production. One approach to accelerate gonad maturation is through nutritional supplementation using natural ingredients rich in vitamin E, such as moringa leaf (Moringa oleifera) extract. This study aimed to evaluate the effect of moringa leaf extract supplementation in feed on gonad maturation and survival rate of giant freshwater prawn broodstock. The study employed an experimental method using a Completely Randomized Design (CRD) with four treatments and three replications. The treatments consisted of different doses of moringa leaf extract in feed, namely 0 mg/kg feed (control), 134 mg/kg feed, 268 mg/kg feed, and 402 mg/kg feed. Broodstock were maintained in aquaria and fed twice daily using the ad satiation method. Observed parameters included gonad maturation level, survival rate, and water quality. The results showed that supplementation of moringa leaf extract influenced gonad maturation of giant freshwater prawn broodstock. The highest gonad maturation percentage was observed in the treatment of 402 mg/kg feed, reaching 30%, while treatments of 134 mg/kg and 268 mg/kg feed each resulted in 10% gonad maturation. No gonad maturation was observed in the control treatment. The highest survival rate was obtained in the control and 134 mg/kg feed treatments (60%), followed by 268 mg/kg feed (50%) and 402 mg/kg feed (40%). Water quality parameters during the study remained within suitable ranges for prawn culture. In conclusion, supplementation of moringa leaf extract at a dose of 402 mg/kg feed was effective in accelerating gonad maturation of giant freshwater prawn broodstock.
Analysis of water quality and the occurrence of Infectious Myonecrosis Virus (IMNV) in intensive Vannamei Shrimp (Litopenaeus Vannamei) farming Frans Yudistira; Anis Zubaidah; Hariyadi Hariyadi
IJOTA (Indonesian Journal of Tropical Aquatic) Vol. 7 No. 2 (2024): August
Publisher : Universitas Muhammadiyah Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22219/ijota.v7i2.13279

Abstract

Water quality plays an important role in maintaining the health and survival of cultured vannamei shrimp (Litopenaeus vannamei). This study aimed to analyze water quality parameters and determine differences in the occurrence of Infectious Myonecrosis Virus (IMNV) between two intensive vannamei shrimp farming companies. The study was conducted in two intensive shrimp farming companies located in North Lombok Regency, West Nusa Tenggara Province. Water quality parameters were observed during the culture period, and the data were analyzed using an independent-samples t-test. The results indicated that water quality conditions were generally suitable for intensive vannamei shrimp culture. However, nitrite concentrations increased when pond siphoning was not performed on time. The independent-samples t-test showed no significant difference in the occurrence of myo virus disease or IMNV associated with water quality between Company A and Company B (0.898 > 0.05). The absence of a significant difference may be related to the geographical proximity of the two companies, which are located within the same regency and obtain seawater from the same coastline. Consequently, both farms may experience similar water-quality conditions and may be exposed to the same disease or virus simultaneously or alternately.
Effect of Binahong Leaf Powder (Anredera Cordifolia) supplementation in feed on the growth performance of Vannamei Shrimp ( Litopenaeus Vannamei ) Anis Zubaidah; Dony Prasetyo; Novia Budii Lestari
IJOTA (Indonesian Journal of Tropical Aquatic) Vol. 7 No. 2 (2024): August
Publisher : Universitas Muhammadiyah Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22219/ijota.v7i2.45251

Abstract

Vaname shrimp (Litopenaeus vannamei) is a fishery commodity that has economic value. Vaname shrimp demand from year to year continues to increase. Increasing shrimp demand can be surmounted by accelerating shrimp growth. The purpose of this study was to know the best dose which most effective of binahong leaves powder in feed on the growth performance of vaname shrimp. Shrimp used are sized 5-6 grams. This study uses a Completely Randomized Design (CRD) consisting of 5 treatments and 3 replications to obtain 15 experimental units. In the control treatment without Binahong leaf powder, treatment 1 (10 grams/kg feed), treatment 2 (20 grams/kg feed), treatment 3 (30 grams/kg feed), and treatment 4 (40 grams/kg feed). The parameters measured are ADG / daily growth, absolute length growth, BWG / body weight gain, Mean Body Weight (MBW), survival rate, amount of feed consumption, feed efficiency, Feed Conversion Rate (FCR), and moulting frequency. The results of the study showed that the addition of Binahong leaf powder in feed significant effect (P<0,05) on the ADG / daily growth, absolute length growth, BWG / body weight gain, and feed efficiency, but not significcant effect on the Mean Body Weight (MBW), survival rate, amount of feed consumption, Feed Conversion Rate (FCR), and moulting frequency. The best results are obtained on the treatment 3 (30 grams/kg feed) with the value of ADG / daily growth harian 0,72 grams, absolute length growth 2,75 cm, BWG / body weight gain 92%, Mean Body Weight (MBW) 8,36 grams, survival rate 97,76%, FCR 1,24 grams, amount of feed consumption 113,43 grams, feed efficiency 42,33 grams and moulting frequency 18 shrimps
Effectiveness of red Chili Pepper Juice addition (Capsicum Annuum) on the growth and red color intensity of Comet Goldfish (Carassius Auratus) Anis Zubaidah; Ganjar Adhywirawan Sutarjo; Hikmah Perwita Sari
IJOTA (Indonesian Journal of Tropical Aquatic) Vol. 7 No. 1 (2024): February
Publisher : Universitas Muhammadiyah Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22219/ijota.v7i1.45255

Abstract

The quality of ornamental goldfish is highly influenced by body color brightness, which depends on carotenoid content. Since fish cannot synthesize carotenoids naturally, supplementation through feed is required to enhance pigmentation. Cayenne pepper is a natural carotenoid source that has potential to improve fish coloration. This study aimed to evaluate the effect of cayenne pepper extract supplementation on the red color intensity, growth, and survival rate of Comet goldfish. The research employed an experimental method using a Completely Randomized Design (CRD) with four treatments and three replications. The treatments consisted of different cayenne pepper extract concentrations in feed: 0% (control), 1%, 3%, and 5%. Comet goldfish with an average size of ±6 cm were stocked at a density of 10 fish per aquarium and fed three times daily at 5% of biomass. Water quality management, including siphoning and partial water exchange, was conducted every three days. The results showed that cayenne pepper supplementation significantly improved the red color intensity of Comet goldfish. The highest color intensity was obtained in the 5% treatment (22.77 ± 4.96). The highest length growth was also recorded in the 5% treatment (0.50 ± 0.13 cm), while the highest weight gain was observed in the 3% treatment (1.43 ± 0.07 g). The highest survival rate was achieved in the 5% treatment (96.67%). Water quality remained within suitable ranges throughout the study. These findings indicate that 5% cayenne pepper supplementation effectively enhances coloration, growth, and survival of Comet goldfish.
Effect of different salinity levels on the growth rate and survival of Barramundi (Lates Calcarifer) Iman Fauzi Sumarsono; Ganjar Adhywirawan Sutardjo; Soni Andriawan
IJOTA (Indonesian Journal of Tropical Aquatic) Vol. 8 No. 1 (2025): February
Publisher : Universitas Muhammadiyah Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22219/ijota.v8i1.12349

Abstract

Ikan kakap putih (Lates calcarifer) merupakan salah satu komoditas ikan air laut yang memiliki nilai ekonomis yang penting. Namun produksi kakap putih belum mencapai target produksinya. Tujian penelitian ini adalah kajian lanjut tentang pengaruh perbedaan salinitas terhadap laju pertumbuhan dan sintasan Ikan Kakap Putih (Lates  calcarifer). ikan kakap (Lates calcarifer) yang digunakan berukuran 6 cm. Penelitian ini menggunakan Rancangan Acak Lengkap (RAL) yang terdiri dari 4 perlakuan dan 3 kali ulangan sehingga diperoleh 12 unit percobaan. Pada perlakuan  P1  salinitas 0 ppt,  P2 salinitas 11 ppt, P3 salinitas 22 ppt, P4 salinitas 32 ppt. Parameter yang diukur berupa Pertumbuhan  Panjang spesifik, Pertumbuhan bobot spesifik, Pertumbuhan panjang mutlak, Pertumbuhan bobot mutlak, dan Tingkat kelangsungan hidup. Hasil penelitian diperoleh bahwa pengaruh perbedaan salinitas memberikan pengaruh nyata (P<0,05) terhadap  Pertumbuhan  Panjang spesifik, Pertumbuhan bobot spesifik, Pertumbuhan panjang mutlak, Pertumbuhan bobot mutlak, dan Tingkat kelangsungan hidup. Hasil terbaik diperoleh pada perlakuan 1 (0 ppt) dengan nilai panjang mutlak 0.71±0.15, bobot mutlak 1.22±0.30, pertumbuhan panjang spesifik 3.66±0.23, pertumbuhan bobot spesifik 3.30±0.42. Disimpulkan bahwa perubahan salinitas  terhadap laju pertumbuhan dan sintasan ikan kakap putih (Lates calcarifer) memberikan pengaruh nyata terhadap pertumbuhan ikan kakap putih. Kadar salinitas terbaik dalam penelitian ini adalah 0 ppt.
Analysis of microplastic abundance in Jerbung Shrimp (Fenneropenaeus Merguiensis) in wind sea water, Pasuruan East Java Province Meishela Dwi Lawidya; Riza Rahman Hakim; Hariyadi Hariyadi
IJOTA (Indonesian Journal of Tropical Aquatic) Vol. 8 No. 1 (2025): February
Publisher : Universitas Muhammadiyah Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22219/ijota.v8i1.12358

Abstract

Plastic production worldwide has increased the development of synthetic polymers in the mid-20th century. When disposed of in the marine environment, plastic can harm organisms in the sea. The plastic degradation process is very slow, and thus microplastic has the potential to last for a very long period of time in the marine environment (Hidalgo, et al , 2012). This can threaten organisms in the waters to consume microplastic continuously. The purpose of this study is to determine the captured shrimp in the waters are microplastic contaminated and to find out what type of microplastic is found. Shrimp sampling is done for two months, located in the Lekok Sea Waters, Pasuruan Regency, East Java. Shrimp samples that have been taken are then analyzed in the fisheries laboratory by taking shrimp intestines and shrimp meat and then adding 10% KOH at a ratio of 1: 3 and roasted using a temperature of 60˚C for 24 hours for the destruction process. Based on microplastic analysis of the shrimp, it was found that the largest abundance of microplastic was dominated by microplastic fiber types compared to other types such as fragments and films. The abundance results show that at station 1 the average is 1 - 43 particles / gram, station 2 the average abundance value of microplastic is 2 - 31 particles / gram, station 3 the average abundance is 2 particles / gram - 31 particles / gram with very diverse sizes.

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