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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 7 Documents
 1 
Search results for , issue "Vol. 5 No. 1 (2022): February 2022" : 7 Documents clear
The effect of addition of calcium oxide (CaO) on the cultivation of Litopenaeus vannamei in freshwater Husnul Ayu Juniarti; Nanda Diniarti; Andre Rachmat Scrabra
IJOTA (Indonesian Journal of Tropical Aquatic) Vol. 5 No. 1 (2022): February 2022
Publisher : Universitas Muhammadiyah Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22219/ijota.v5i1.17899

Abstract

Indonesia, as the fourth-largest global producer of Vannamei shrimp, is facing increasing demand for shrimp, necessitating higher production. In response, the cultivation of Vannamei shrimp in freshwater has gained traction. However, freshwater environments are limited in essential calcium minerals required for shrimp growth. To address this issue, research on the addition of calcium oxide (CaO) in freshwater Vannamei shrimp cultivation was conducted. The main objective of this study was to assess the impact of calcium oxide (CaO) and determine the optimal dosage for the survival rate and growth of Vannamei shrimp in freshwater. The experimental method was employed, consisting of five different dosage treatments: seawater control, freshwater control, 40 ppm, 80 ppm, and 120 ppm of calcium oxide. The findings of this study revealed that the treatment with 120 ppm of calcium oxide exhibited the most favorable growth, with a weight of 16.40 g in the freshwater treatment. Additionally, the 80 ppm treatment demonstrated the highest survival rate, reaching 67% in the freshwater treatment.
Blood profile of Tilapia (Oreochromis niloticus) fed fortification feed with seaweed flour (Gracilaria sp.) Linda Linda; Dewi Nur'aeni Setyowati; Dewi Putri Lestari
IJOTA (Indonesian Journal of Tropical Aquatic) Vol. 5 No. 1 (2022): February 2022
Publisher : Universitas Muhammadiyah Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22219/ijota.v5i1.18616

Abstract

Seaweed Gracilaria sp. is a marine plant that contains secondary metabolites that can be used as an immunostimulant in tilapia (Oreochromis niloticus). The blood picture can be used as an evaluation material for the physiological response of fish. The aim of the study was to determine the effect of fortification of seaweed flour Gracilaria sp. on the blood profile of tilapia. The study used an experimental method with 4 treatments, namely, P1: control feed; P2: flour fortification of Gracilaria sp. 4%; P3: 8%; and P4: 12% respectively. The research data were analyzed by linear regression for the blood profile and variance for the absolute weight, SR, and FCR data. The results showed that fortification of seaweed flour Gracilaria sp. the feed did not have a significant effect on hemoglobin levels, hematocrit, erythrocyte counts, and leukocytes. However, it has a significant effect on increasing absolute weight, survival, and feed conversion rates. Flour fortification of Gracilaria sp. with a concentration of 8% or 80g/kg of feed is the best concentration that can affect the blood profile
The effect of additional Silk worm (Tubifex sp.) on artificial feed on the number of larva Guppy fish (Poecilia reticulata) Ashari Kautsar; Muhammad Marzuki; Andre Rachmat Scrabra
IJOTA (Indonesian Journal of Tropical Aquatic) Vol. 5 No. 1 (2022): February 2022
Publisher : Universitas Muhammadiyah Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22219/ijota.v5i1.18828

Abstract

Aquaculture does not only cover consumption fish production, there is also ornamental fish production. Guppy fish (Poecilia reticulata) is one of the popular ornamental fish because of its many varieties and easy maintenance and cultivation.The aim of the study was to evaluate the effect of giving silk worms (Tubifex sp.) on spawning parent guppy (Poecillia reticulata) and to analyze the appropriate dose of silk worms on spawning brood guppy (Poecillia reticulate). This study used an experimental method with the addition of tropical almond leaf powder. The experimental design used was a completely randomized design (CRD) consisting of 5 treatments, namely treatment P0 (100% artificial feed/control), P1 (95% artificial feed, 5% silk worms.), P2 (90% artificial feed, silk worms). 10%), P3 (85% artificial feed, 15% silk worms), P4 (80% artificial feed, 20% silk worms) and each treatment was repeated 3 times. The results showed that the addition of silk worms (Tubifex sp.) in artificial feedsignificant effect on the parameters of absolute weight growth of broodstock, feed conversion ratio, gonadosomatic index, and the number of larvae produced. Meanwhile, the survival rate parameters for both broodstock and guppy larvae had no significant effect.The highest average value of each parameter occurred in the P4 treatment.
Utilization of Herbal Ingredients on Vannamei (Litopenaeus vannamei) In Instalasi Budidaya Laut, Tasikmadu Village, Sub-District Watulimo, Trenggalek Regency, East Java, Indonesia Putri Nurhanida Rizky; Mita Nur Malasari; Atika Marisa Halim; Anna Fauziah
IJOTA (Indonesian Journal of Tropical Aquatic) Vol. 5 No. 1 (2022): February 2022
Publisher : Universitas Muhammadiyah Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22219/ijota.v5i1.20220

Abstract

The purpose of this study was to conduct a technical analysis on vannamei (L. vannamei) rearing activities that utilize herbal ingredients including cultivation systems, preparation, fry stocking, feed management, water quality management, harvesting and post-harvesting in Instalasi Budidaya Laut (IBL), Trenggalek, East Java, Indonesia. Data analysis using descriptive analysis. In this study, the pond preparation process included washing tubs, drying for 3 days, liming at a dose of 30 ppm on the walls and bottom of the pond, filling water with a height of 80 cm and stocking with 300 ppm of Organic Fertilizer (POT). Shrimps acclimatized by adding 1 ml of Bionutren. The stocking density is 800 post larvae/m2 with a total stocking of 5,500 individuals. The feed was fermented for 3 days with the addition of Liquid Organic Fertilizer (POC). Feed management uses an acceleration system, which is feeding 24 hours non-stop according to anco control. The results of water quality monitoring obtained are temperature 28◦C – 32◦C, salinity 12 – 28 ppt, DO 3 – 5 mg/l, pH 6.2 – 7.1. Water quality control is carried out by spreading water POC at a dose of 60 ppm and siphoning is carried out every day starting from DOC 17. Herbal ingredients from temulawak and ginger in bionutren products produced FCR 1.3, SGR 10.42%, shrimp tonnage 60 kg/pond, and the survival rate 53.57%.
Habitat prediction of Shrimp Barong (Panulirus spp) in East Java Waters Samsul Huda; Siti Naviah
IJOTA (Indonesian Journal of Tropical Aquatic) Vol. 5 No. 1 (2022): February 2022
Publisher : Universitas Muhammadiyah Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22219/ijota.v5i1.20364

Abstract

The production of barong shrimp (Panulirus spp) is mostly caught from the sea, although restocking efforts have been initiated, the results have not had an impact. The high demand and its economic value increase the frequency of catching efforts, therefore information on the stock condition of barong shrimp (Panulirus spp) and their distribution habitat is needed to create a sustainable resource. This study aims: to obtain the stock of sustainable potential and the distribution of their habitat in the waters of East Java. The research method uses the Walter-Hilborn model approach, the results conclude that the standard type of fishing gear is Trap, the prediction of potential biomass stock in open access conditions in 2030 is 37,763.64 Kg, the remaining stock in 2030 is 21 percent ( %), sustainable fishing effort 143,2000 trips/year, maximum sustainable catch 45820.15kg/year, fishing power 0.0000004, habitat distribution dominance in Water Management Area 712.
Screening of amilolytic bacteria in the digestive tract of Red Snapper (Lutjanus campechanus) as probiotic candidates Desi Indah Ramadani; Anis Zubaidah; Ganjar Adhywirawan Sutarjo
IJOTA (Indonesian Journal of Tropical Aquatic) Vol. 5 No. 1 (2022): February 2022
Publisher : Universitas Muhammadiyah Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22219/ijota.v5i1.20365

Abstract

Fish utilize energy from carbohydrate sources in small amounts because of the low secretion of the enzyme amylase for digestion. One alternative is to increase the availability of exogenous digestive enzymes by utilizing bacteria from the digestive tract that have amylolytic activity. This study aims to isolate amylolytic bacteria in the digestive tract of Red Snapper as a probiotic candidate. This study used several methods, namely amylolytic test on starch, test for resistance to acid conditions (pH 3), observation of bacterial growth for 30 hours, antagonistic test against pathogenic bacteria, test for attachment to the stomach, gram staining test, and pathogenicity test on shrimp. Screening of amylolytic bacteria in the digestive tract of red snapper produced five isolates, namely A1, A2, A3, A4, and A5. From the results of the amylolytic test, only three isolates were further tested, namely A1, A2, and A4. The three isolates were able to survive in acidic conditions of pH 3 and pH 7 for eight hours with density values ​​(OD) in isolates A1 (0.630), A2 (0.597), and A4 (0.601). Isolates A1, A2, and A4 respectively produced antagonistic values ​​with inhibition zones of 8.4 mm, 7.5 mm, and 10.3 mm. Next. the ability to attach bacteria to isolates A1 (6.6 x 102 cfu/ml), A2 (11.8 x 102 cfu/ml) and A4 (16.5 x 102 cfu/ml). After that, the pathogenicity test was carried out aimed at proving that the isolate was not pathogenic to the host. Based on the results of the study, there were three bacterial isolates (A1, A2, and A4) in the digestive tract of red snapper that had met the requirements for probiotic candidates in fish/shrimp and the best was A4 isolate.
Growth performance of seaweed (Kappapicus alvarezii) in tissue culture with immersion of NPK and TSP fertilizer Sinung Rahardjo; Ratna Suharti; Deby Tiara Sandi; Hany Handajani
IJOTA (Indonesian Journal of Tropical Aquatic) Vol. 5 No. 1 (2022): February 2022
Publisher : Universitas Muhammadiyah Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22219/ijota.v5i1.20581

Abstract

Kappapicus alvarezii is an important economic commodity of seaweed to be developed in Indonesia. In the context of its development, seeds from tissue culture are needed.The aim of this research is to examine the growth of seaweed by immersing NPK, TSP and combination fertilizers between NPK + TSP on absolute weight, Specific Growth Rate (SGR) and morphological growth including talus length and seaweed talus diameter. This research was conducted from March 2 to May 15, 2020 in the waters of Sumberkencono Village, Wongsorejo Sub-District, Banyuwangi District, East Java. This study uses Kappaphycus alvarezii seaweed seedlings from tissue culture results from the Situbondo Brackish Aquaculture Fisheries Center, and uses treatment fertilizers, namely NPK fertilizer with 15% Nitrogen (N) composition, Phosphate (P2O5) 15%, and Potassium (K) 15% at a dose of 2 g / l and TSP fertilizer with an element composition of Phosphate (P2O5) 18% at a dose of 2 g / l, as well as a combination of NPK fertilizer 1 g / l and TSP 1g / l soaked for 15 minutes and control or without soaking. From the results of the research, obtained weight growth of seaweed by immersing NPK + TSP obtained good growth (Absolute Weight 57.48 grams, SGR 7.21%, talus length 8.5 cm, diameter 6.52 mm), then NPK treatment (Weight Absolute 37.80 grams, SGR 6.13%, Talus length 8.1 cm, diameter 6.43 mm), TSP treatment (Absolute Weight 31.6 grams, SGR 5.69%, Talus length 7.9 cm, diameter 6.36 mm) followed by control (Absolute Weight 24.8 grams, SGR 5.10%, Talus length 7.6 cm, diameter 6.32 mm).

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