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Pemberian Pakan Limbah Lemuru pada Pertumbuhan Ikan Cupang (Betta splendens) Indra Nur Cahyati; Nyoman Dati Pertami; Gde Raka Angga Kartika
Current Trends in Aquatic Science Vol 5 No 2 (2022)
Publisher : Program Studi Manajemen Sumberdaya Perairan, Fakultas Kelautan dan Perikanan, Universitas Udayana

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Betta fish (Betta splendens) is an ornamental fish that is in great demand by the community from adults to children. This fish has features such as beautiful body color, unique fin shape, and easy to maintain in a low oxygen environment. The growth rate is still slow causing the maintenance period to be relatively long so that the profits obtained are relatively small. Feeding is one of the important factors in the growth optimization process. Feed that has high protein can be used as a solution in betta fish cultivation. The feed used in the study was lemuru waste (head and bones). This study was conducted to determine the growth of betta fish (Betta plendens) fed lemuru waste feed. The study was conducted with the control jar treatment, the treatment jar A using a dose of 3%, the treatment jar B using a dose of 6%, the treatment jar C using a dose of 9%. This research was conducted for 42 days. Betta fish growth in the form of absolute weight, absolute length, specific growth rate (SGR), survival rate (SR), feed conversion ratio (FCR). Water quality parameters measured in this study include temperature, pH and DO. The results of the ANOVA study showed that survival had no significant effect on fish growth, while absolute weight, absolute length, SGR and feed conversion ratio had a significant effect on the growth of betta fish. The water quality parameters measured included temperature ranging from 27.20 to 27.69 0C, DO with a range of 3.00-3.03mg/L and a pH of 6.60-6.68.

Kandungan Nutrien (Nitrat dan Fosfat) di Sungai Seruai, Sumatera Utara Bryan Baginta Gurusinga; Ima Yudha Perwira; Alfi Hermawati Waskitasari
Current Trends in Aquatic Science Vol 5 No 2 (2022)
Publisher : Program Studi Manajemen Sumberdaya Perairan, Fakultas Kelautan dan Perikanan, Universitas Udayana

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Seruai River is a river located in the administrative area of ??Deli Serdang Regency, North Sumatra. The Seruai River has the potential to influence the increase in nutrient content in the watershed, because there are many interactions between land and water that cause changes in nutrient content in the Seruai River. The study was carried out during July 2021. The analysis used a descriptive method and used Indonesian Government Regulation Number 22 of 2021 as a comparison of water quality. Determination of sample points using purposive sampling method. The water parameters measured in this study were nitrate, phosphate, DO, pH, temperature and TDS. Based on the results of the study showed that there was an increase in the content of nitrate and phosphate content from upstream to downstream. The nitrate content from upstream to downstream ranged from 5.5 mg/L to 16.9 mg/L, while the phosphate content from upstream to downstream ranged from 0.2 mg/L to 1.8 mg/L. The rate of increase in nitrate upstream to the middle is 0.026 mg/L.km while the middle to downstream is 0.123 mg/L.km. The rate of increase in phosphate from upstream to midstream is 0.005 mg/L.km while the middle to downstream is 0.010 mg/L.km. The highest nitrate and phosphate content was in the sampling week 04/07/2021 while the lowest nitrate content was in the 25/07/2021 week and the lowest phosphate was in the sampling week 18/07/2021.

Analisis Potensi Pasar Komoditas Garam di Pantai Selatan Kabupaten Malang Abd. Aziz Amin; Adi Tiya Yanuar; Zulkisam Pramudia; Yogita Ayu Dwi Susanti; Lutfi Niâ€™matus Salamah; Rika Kurniaty; Riski Agung Lestariadi; Lukman Hakim; Citra Satrya Utama Dewi; Tri Budi Prayoga; Gatot Ardian; M. Nasirudin Yahya; Muhammad Amenan; Andi Kurniawan
Current Trends in Aquatic Science Vol 5 No 2 (2022)
Publisher : Program Studi Manajemen Sumberdaya Perairan, Fakultas Kelautan dan Perikanan, Universitas Udayana

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Salt is one of the marine mineral products that has great potential in Indonesia. Salt production in Indonesia is mostly located on the island of Madura and the north coast of Java. Indonesia still imports salt to meet salt needs, especially for industrial salt needs. In increasing national salt production, one of the strategic steps that need to be taken is to increase the area of ??salt ponds in Indonesia. To increase the area of ??salt land, one important strategy is to open salt ponds outside the North Coast of Java and Madura Island. One alternative location is the beaches in the southern region of Java Island. Salt production on the South Coast of Java has not been done much. On the South Coast of Malang Regency, there is no salt production business. The creation of salt production in the South Coast of Malang Regency needs to be based on an analysis of market potential. This study aims to analyze the market potential of salt commodities in the South Coast of Malang Regency. This study is the first study to analyze the market potential for the development of salt production in the South Coast of Malang. The results of this study indicate that the main market potential for salt production in the South Coast of Malang is salt for fishery activities and salt for livestock. In addition, there is a potential market for salt education activities and consumption salt. Based on the results of this study, the development of the salt commodity market in the South Coast of Malang can be developed with a Niche Marketing approach.

Kandungan Bahan Organik Total (BOT) dan Kekeruhan pada Air di Estuari DAM, Badung, Bali Ahmad Alfian Rahman; Ima Yudha Perwira; I Wayan Darya Kartika
Current Trends in Aquatic Science Vol 5 No 2 (2022)
Publisher : Program Studi Manajemen Sumberdaya Perairan, Fakultas Kelautan dan Perikanan, Universitas Udayana

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This study aimed to know the Total Organic Matter (TOM) of water and the water quality in the Estuary DAM, Badung, Bali. This study was carried out for 1 month along March of 2021. Water samples were collected from 4 stations representing: the inlet (station 1), the middle part (station 2 and 3), and the outlet (station 4). The TOM of water was measured using Permanganate Test titrimetrically. Dissolved Oxygen (DO), pH and water turbidity were measured using: DO meter, pH meter, and Turbidimeter. Result of the study showed that the TOM of water in the Estuary DAM was ranging from 1,8 to 13,9 mg/L. The TOM of water at Week 2 and 4 was relatively low compared to other period which might be caused by dilution regarding to the high rainfall in this period. The DO level was ranging from 4,0 to 6,5 mg/L, pH was ranging from 6,0 to 6,2, and turbidity was ranging from 3,73 to 13,82 mg/L

Pendederan Ikan Nila (Oreochromis niloticus) Tahap II Menggunakan Pakan Fermentasi dengan Agen yang Berbeda Annas Cesar Mayasha; Pande Gde Sasmita Julyantoro; Ni Putu Putri Wijayanti
Current Trends in Aquatic Science Vol 5 No 2 (2022)
Publisher : Program Studi Manajemen Sumberdaya Perairan, Fakultas Kelautan dan Perikanan, Universitas Udayana

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Fermented feed application for fish nursery have been known could improve nutritional value, growth, and increase digestibility of cultured fish. The purpose of this study was to determine the effect of fermented feed with different fermentation agent on the performance of stage II tilapia nursery. The fermentation agent used in this study were fermipan containing 25 g/kg of yeast (Saccharomyces cerevisiae) and probio?7 containing 25 ml/kg of bacteria (Bacillus sp.). The study was performed by 3 treatments and 3 replications each treatment. The treatments were treatment A (control), treatment B (fermentation using S. cerevisiae 25 g/kg), and treatment C (fermentation Bacillus sp. 25 ml/kg). The observation for 2 months showed that the highest of specific growth rate of tilapia (Oreochromis niloticus) was found in treatment B with 5,12%/day, followed by treatment C (4,90%/day), and the lowest was treatment A (4,80%/day). The highest survival of tilapia (O. niloticus) was found in treatment B of 70%, followed by treatment C (63,33%), and the lowest was treatment A (60%). The results of the One-Way ANOVA statistical analysis with Duncan's post hoc test showed significantly different between treatments for the specific growth rate and survival of tilapia (P<0.05). The highest feed conversion ratio (FCR) was found in treatment A of 2,49, followed by treatment C (2,35), and the lowest was in treatment B (2,29). This FCR results were not significantly different between treatments (P>0.05). Water quality parameters measured include dissolved oxygen (DO), degree of acidity (pH), temperature, ammonia, nitrate, and nitrite were still within optimal range for Tilapia nursery culture.

Kandungan Nitrat dan Fosfat pada Air Sungai Yeh Ho Tabanan, Bali Lasmana Prasat; Ima Yudha Perwira; Dewa Ayu Angga Pebriani
Current Trends in Aquatic Science Vol 5 No 2 (2022)
Publisher : Program Studi Manajemen Sumberdaya Perairan, Fakultas Kelautan dan Perikanan, Universitas Udayana

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This study aimed to determine the value of nitrate, phosphate, and the quality state of the water in the Yeh Ho river Tabanan Regency Bali based on the Government Regulation Number 22/2021. This research was conducted at 3 different location (upstream as station 1, middle stream as station 1, and downstream as station 3) of the Yeh Ho River (Tabanan, Bali) during February 2021. Water sample was analyzed for nitrate, phosphate, and the other water quality parameters (pH, temperature, and DO). Nitrate was measured using KIT Salifert Nitrate, phosphate was measured using KIT Hanna HI713, pH was measured using pH meter, water temperature was measured using thermometer, and DO was measured using DO meter. The result showed that nitrate in the water of Yeh Ho river was ranging from 0.25 to 0.29 mg/L, while phosphate was ranging from 0.10 to0.19 mg/L. The average value of pH, temperature, and DO in the water were: 6,95 mg/L, 27,15oC, and 5,2 mg/L, respectively. This result indicates that nitrate and phosphate value in the water of Yeh Ho river is belong to Class II and III which can be used for aquaculture and recreational use.

Pengaruh Penggunaan Substrat yang Berbeda terhadap Tingkat Keberhasilan Pemijahan Ikan Pelangi Boesemani (Melanotaenia Boesemani) Muhammad Sulthon Subekhi; I Wayan Restu; Bastiar Nurdin
Current Trends in Aquatic Science Vol 5 No 2 (2022)
Publisher : Program Studi Manajemen Sumberdaya Perairan, Fakultas Kelautan dan Perikanan, Universitas Udayana

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boesemani Rainbow fish (Melanotaenia boesemani) is one of the endemic freshwater ornamental fish species originating from Papua which has economic value. Rainbow fish cultivation techniques have now developed but there are not many publications so it is necessary to study the cultivation process, especially the hatchery stage. The research was conducted in August-October 2018 at the Ornamental Fish Cultivation Research Institute (BRBIH), Depok, West Java. This study aims to determine the effect of using different substrates on the rate of fertilization and hatching of Boesemani Rainbow Fish eggs. Data were collected by spawning male and female sires that had matured gonads 15 times with 3 treatments and 3 repetitions. The substrates used as media were treatment A (raffia rope), treatment B (palm fiber), and treatment C (apu-apu water plant). Water quality measurements include temperature, pH, DO. The data analysis technique used is the analysis of variance (ANOVA). Based on the measurement results, the total number of eggs with treatment A was 709 pieces, treatment B was 771 pieces, and Treatment C was 511 pieces. The highest percentage of fertilization rate was found in treatment B (98.4%Â±0.7). The highest percentage of hatching rate was found in treatment A (90.8%Â±5.6). The results of the analysis showed that the use of different substrates did not significantly affect the rate of fertilization and hatching of Boesemani Rainbow Fish eggs.

Studi Kelimpahan dan Keanekaragaman Tumbuhan Air di Danau Tamblingan, Bali I Kadek Tobing Ascahya; I Wayan Arthana; Ni Putu Putri Wijayanti
Current Trends in Aquatic Science Vol 5 No 2 (2022)
Publisher : Program Studi Manajemen Sumberdaya Perairan, Fakultas Kelautan dan Perikanan, Universitas Udayana

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This research aimed to know the diversity abudance and water quality conditions of the life of aquatic plants in Lake Tamblingan. Sampling used methods of observation and purposive sampling. Analysis method used value of diversity indices and abudance. Aquatic plants discovered in Lake Tamblingan were 5 types, divided into 3 types of habitat, namely the type of free floating, floating leaved and emergent. Free float type (free floating) consists of Salvinia molesta, floating-leaved plants (floating leaved) consists of Myriophyllum aquaticum, Nymphoides indica plants sticking out (emergent) consists of Alternanthera philoxeroides, Persicaria decipiens. The highest diversity index value was in stations 3 (far from setlement) of 1,42. The highest abundance value of water plants found in station 2 (close to water recreation site) of 148,20 ind/mÂ² with water plant species of Nymphoid indica. Water quality of DO, pH, Temperature, brightness, depth, nitrate and phosphate showed that the waters of Tamblingan Lake was still on the threshold for the growth of aquatic plants and the diversity was in the medium category.

Fluktuasi Nilai Fosfat dan Nitrat pada Pembesaran Ikan Nila Yang Diberi Tanaman Seledri (Apium graveolens) Rachmat Andi Saputra; I Wayan Arthana; Gde Raka Angga Kartika
Current Trends in Aquatic Science Vol 5 No 2 (2022)
Publisher : Program Studi Manajemen Sumberdaya Perairan, Fakultas Kelautan dan Perikanan, Universitas Udayana

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Aquaculture activities leads to increase the nitrate and phosphate due to nutrient input from the leftover fish farming feed. Nitrate and phosphate enrichment can be minimized by using concept of aquaponics and growing aquatic plants around the cultivation area. This study tries to find out the fluctuation nitrate and fosfat value on tilapia fish growing given celery (Apium graveolens) in tilapia fish farm. Celery plants were planted with three different treatments, namely the plants were planted using a flannel wick, the roots touched the water surface, and submerged beyond the plant roots to the stems. The results of observations for 1 month showed the highest average growth rate of celery (A. graveolens) in treatment A and the lowest in treatment C. The highest relative growth was in treatment A and the lowest was in treatment C. The highest survival was found in A and the lowest was in treatment C. The best phosphate absorption was in treatment B with 0.32 mg/L, and the lowest was in treatment C with 0.00 mg/L. The best nitrate uptake was in treatment A with 0.66 mg/L, and the lowest was in treatment B with 0.84 mg/L. The results of the One-Way ANOVA statistical test with Duncan's follow-up test showed significantly different treatments for phosohate and nitrate.

Pertumbuhan Ikan Tongkol Lisong (Auxis rochei Risso, 1810) di Perairan Kedonganan, Bali Ghina Nafis Rahmatullah; Nyoman Dati Pertami; Made Ayu Pratiwi
Current Trends in Aquatic Science Vol 5 No 2 (2022)
Publisher : Program Studi Manajemen Sumberdaya Perairan, Fakultas Kelautan dan Perikanan, Universitas Udayana

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Bullet tuna (Auxis rochei) is a type of pelagic fish that has important economic value and is a source of livelihood for fishermen in the waters of Kedonganan, Badung, Bali. This study aims to determine the growth of bullet tuna (Auxis rochei) by analyzing the length frequency distribution, growth patterns, condition factors, age groups, and growth parameters. Sampling of bullet tuna was carried out from January to March 2021, as many as 6 times sampling with a span of once every 14 days. The total samples of bullet tuna obtained were 638 individuals. The distribution of the length distribution of bullet tuna is between 268-376 mm. The results showed that the growth pattern of male and female bullet tuna was negative allometric which indicated that the fish's length increased faster than its weight gain. The condition of bullet tuna in Kedonganan waters based on the results of the study showed that bullet tuna were in a less good condition. The value of the condition factor of the female bullet tuna decreased from January to March, while the condition factor of the male bullet tuna decreased only in February. There was a shift in the age group from observations 1 to 5 in the age group to the right, in contrast to observations from 5 to 6 there was no shift in age groups. The growth coefficient (K) of bullet tuna is 0.57 per year, where the asymptotic length is 387.07 mm and the theoretical age of fish at length 0 is -0.854. Based on the parameters of the growth coefficient, it can be seen that the annual growth of bullet tuna in Kedonganan waters is not fast and not large.

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Contact Name
-

Contact Email
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Journal Mail Official
-

Editorial Address
-

Location
Kota denpasar,

Bali

INDONESIA