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Studi Kelimpahan Bintang Mengular (Ophiuroidea) di Pesisir Pantai Nyang-Nyang, Bali Yusuf Arifianto Purnomo; Devi Ulinuha; I Wayan Darya Kartika
Current Trends in Aquatic Science Vol 6 No 2 (2023)
Publisher : Program Studi Manajemen Sumberdaya Perairan, Fakultas Kelautan dan Perikanan, Universitas Udayana

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The goal of this study was to determine the habitat characteristics and population density of brittle stars in coastal area of Nyang-Nyang Beach, Bali. To facilitate the process, observations were made between November and January from 3:00 p.m. to 6:00 p.m., when the tide was at its lowest. The methodology of survey and descriptive comparative approach research was used. Purposive sampling was used to determine observation and sampling locations: two stations known to be brittle star habitats were chosen as research sites. The variables observed were two: biota community structure observations of brittle star variables at the genus level, such as abundance, diversity, evenness, and dominance, which were measured using 1 x 1 m plots. Environmental water quality variables such as beach characteristics, pH, salinity, water temperature, Dyssolved Oxygen, and current velocity are observed. Microsoft Excel was used to perform data analysis calculations. According to habitat analysis, the coast of Nyang-Nyang Beach provides an ideal habitat environment for Echinodermata, particularly the Ophiuroidea class, includes brittle stars. Nyang-Nyang beach had the brittle stars density, with 24 ind/m2 recorded. With an H' value of 0.514, but it was classified as having low diversity. The evenness index value on Nyang-Nyang Beach is 0,468, and there is no dominant genus along the coast of Nyang-Nyang beach because the dominance index value on this beach is close to 0.

Pengaruh Penambahan Senyawa Thiophenone terhadap Kelulushidupan dan Pertumbuhan Larva udang galah yang Diujitantang dengan Bakteri Vibrio harveyi Maulana Ilham Pratama; Pande Gde Sasmita Julyantoro; I Ketut Wija Negara
Current Trends in Aquatic Science Vol 6 No 1 (2023)
Publisher : Program Studi Manajemen Sumberdaya Perairan, Fakultas Kelautan dan Perikanan, Universitas Udayana

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Giant prawns are one of the freshwater aquaculture commodities with high economic value. The high demand for giant prawns is constrained by the low quality of larvae, which affect the prawn growth to reach consumption sizes. Conventional efforts have been made to treat the bacterial diseases in the prawn cultivation using antibiotics. However, it has risk of causing pathogenic bacteria to become resistant to antibiotics. Such issue can be overcome by using inhibiting quorum sensing from pathogenic bacteria, especially thiophenone compounds. This study aimed to determine the effect of adding thiophenone compounds on the survival and growth of giant prawn larvae from Center for Giant Prawns (BBUG) Klungkung, Bali tested with Vibrio harveyi. A completely randomized design of 4 treatments (A: control, B: Larvae and Vibrio harveyi (105 CFU/ml), C: Larvae and thiophenone (10ÂµM), D: Larvae, thiophenone (10ÂµM) and Vibrio harveyi (105 CFU/ml)) and 3 repetitions was done in laboratory. A total of 12 experimental units containing 20 larvae with 0.2liter seawater media at 28?C. The results showed that the survival rate of giant prawn larvae was significantly higher when the larvae challenged with Vibrio harveyi compared to un challenged larvae. Furthermore, there was no difference in prawn larvae growth between the treatments indicated by similar value of Larvae Stage Index (LSI). This study has demonstrated the benefit of employing thiophenone compounds to improve the quality of giant prawn larvae. Further study in challenging the thiophenone compounds with other bacteria that might threat the giant prawn growth is still needed.

Pengaruh Penambahan Saccharomyces cerevisiae pada Pakan terhadap Pertumbuhan Ikan Kakap Putih (Lates calcarifer) I Made Budiarsana; Pande Gde Sasmita Julyantoro; Alfi Hermawati Waskita Sari; I Gusti Ngurah Permana
Current Trends in Aquatic Science Vol 6 No 1 (2023)
Publisher : Program Studi Manajemen Sumberdaya Perairan, Fakultas Kelautan dan Perikanan, Universitas Udayana

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White snapper (Lates calcarifer) is one of the marine aquaculture commodities in Indonesia, which has high economic value and fast growth. This study aims to investigate the influence of Saccharomyces cerevisiae addition into feed on the growth of white snapper (Lates calcarifer). The growth observed was the absolute length growth, the absolute weight, feed conversion ratio, survival, and specific growth rate. This research used experimental methods with complete randomized design non-factorials. White snapper (size 2-3 cm) was maintained for 30 days at a stocking density of 1500 Ind/m3. There were 2 treatments conducted, K treatment (control) and S treatment (pellet + Saccharomyces cerevisiae 100 ml/kg feed). Data analysis was done using t-test. The result showed that the addition of Saccharomyces cerevisiae resulted in decreasing of feed conversion ratio. The absolute length and weight, specific growth rate and survival were higher than the treatment without the addition of Saccharomyces cerevisiae, but not statistically different (p>0,05). The S treatment resulted in higher value of the feed conversion ratio (2,28), growth (7,21 cm/month), absolute weight growth (13,75 g/ month), the specific growth rate (11,92 % /day) and survival of (84,07 % /month). Water quality values such as temperature ranged from 29-31,6 OC salinity 27-32 ppt, pH 7,11-7,57, and dissolved oxygen 1,74-5,64 ppm.

Kondisi Sosial Ekonomi dan Nilai Tukar Nelayan di Desa Sanur Kaja, Denpasar, Bali Ika Setiarini; I Wayan Restu; I Wayan Darya Kartika
Current Trends in Aquatic Science Vol 6 No 2 (2023)
Publisher : Program Studi Manajemen Sumberdaya Perairan, Fakultas Kelautan dan Perikanan, Universitas Udayana

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Important aspects that affect the level of welfare and the economy of fishermen are the socio-economic conditions and exchange rates of fishermen. The purpose of this study was to determine the socio-economic conditions and exchange rates of fishermen in the Sanur Kaja Village. Primary data was obtained based on observations, interviews, and questionnaires on respondents (samples) by purposive sampling, which includes data on social aspects (age, education, number of family dependents, and variety of jobs) and data on economic aspects (fishery income, expenses, and non-fishery income). All data were analyzed using a qualitative and quantitative approach, namely data analysis for calculating Fishermen's Exchange Rates (NTN). Based on the data obtained, the age range of fishermen is 28 years to 61 years, with varying levels of education ranging from not having finished elementary school, elementary school, junior high school, high school, and Diploma to Bachelor with the number of family dependents ranging from 1 to 6 people. The income earned varies from < IDR. 200,000 to IDR. 750,000 with expenses starting from IDR. 100,000 to IDR. 200,000 on 1 time went to sea. Based on the calculation results, the NTN is above 1, which is 1.59. With NTN above 1, this means that fishermen are said to be able to fulfill their basic needs.

Fluktuasi Nilai Fosfat dan Nitrat pada Pembesaran Ikan Nila dengan Sistem Aquaponik yang Diberi Tanaman Mint (Mentha arvensis) Made Sandi Kurniawan; I Wayan Arthana; Gde Raka Angga Kartika
Current Trends in Aquatic Science Vol 6 No 1 (2023)
Publisher : Program Studi Manajemen Sumberdaya Perairan, Fakultas Kelautan dan Perikanan, Universitas Udayana

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Nitrate and phosphate enrichment in Tilapia culture can be minimized using the concept of aquaponics by growing aquatic plants around the cultivation area. The purpose of this study was to determine fluctuations in phosphate and nitrate values ??in tilapia rearing using aquaponics technology using mint (M. arvensis) plants. B, and the three plants sink beyond the roots to the stem (C). The method that use in research is eksperiment with Random Project Complete (RAL). After a month, the highest average growth rate of mint (M arvensis) occurred in treatment A and the lowest in treatment C. The highest specific growth was in treatment A and the lowest was in treatment B. The highest survival rate was in treatment C and the lowest was in treatment B. The best phosphate absorption was found in treatment B with a decrease of 0,12 mg/L, and the lowest was in treatment C with a value of 0,08 mg/L. The best nitrate absorption was found in treatment A with a decrease of 1,38 mg/L, and the lowest in treatment C with an increase of 0,69 mg/L. The results of the One-Way ANOVA statistical test with Duncan's follow-up test showed significantly different treatments for phosphate and nitrate measurements.

Analisis Total Suspended Solid (TSS) Perairan Danau Toba di Kecamatan Girsang Sipangan Bolon, Sumatera Utara Angelina Juniarta Panjaitan; Devi Ulinuha; Ni Made Ernawati
Current Trends in Aquatic Science Vol 6 No 2 (2023)
Publisher : Program Studi Manajemen Sumberdaya Perairan, Fakultas Kelautan dan Perikanan, Universitas Udayana

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Lake Toba, one of the largest lakes in Indonesia, is located in the province of North Sumatera, which has a significant tourism sector. Increased human activity can place the aquatic ecosystem of Lake Toba under great ecological pressure. Total Suspended Solids (TSS) are an important water quality indicator. Various human activities are carried out on Lake Toba, including fish farming in floating net cages (KJA), tourism, and water transportation. This activity produces organic and inorganic substances that have the potential to reduce water quality. Based on the research results, the concentration of total suspended solids (TSS) at five sampling locations exceeded class II water quality standards. The TSS concentration has different variations from the other 4 water sampling points because the 4 water sampling points are not passed by shipping lanes. The large TSS values at the 5 water sampling points can be caused by domestic waste generated from port activities, water transportation, tourism activities, hotels, and offices.

Aplikasi Probiotik Probio One dengan Dosis yang Berbeda pada Pakan Ikan Nila Ni Made Ayuk Suardani; Gde Raka Angga Kartika; Hardiansyah Bama Saputra
Current Trends in Aquatic Science Vol 6 No 2 (2023)
Publisher : Program Studi Manajemen Sumberdaya Perairan, Fakultas Kelautan dan Perikanan, Universitas Udayana

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Various efforts have been made by the community to improve the quality and further accelerate the growth of nile fish. One of them is by mixing probiotics into fish feed. The probiotic used is probio one probiotic which is usually given to koi fish. This study was conducted to find out how the growth of tilapia given feed mixed with probiotics with different doses. The study was conducted with treatment A as a control, treatment B using a probiotic dose of 2,5 g/kg feed, treatment C using a probiotic dose of 5 g/kg feed, treatment D using a dose of 7,5 g/kg feed and treatment E of 10 g/kg feed. This research was conducted over a period of 40 days. Water quality parameters measured in this study included pH, temperature and DO as well as observations of fish growth in the form of absolute weight, specific growth rate (SGR), survival rate and feed conversion ratio. Growth observations were analyzed using One Way Analysis of Variance (ANOVA) and a follow-up test in the form of Duncan's Test. The results showed that the treatment using a dose of 7,5 g/kg feed gave a significantly different effect on absolute weight, specific growth rate and survival rate of tilapia. The water quality parameters measured included pH in the range of 7,98-8,20 while DO in the range of 6,8 â€“ 8,4 mg/L and temperature in the range of 26,64 -26,90Â°C.

Pola Pertumbuhan Mangrove Jenis (Bruguiera gymnorrhiza) dan (Ceriops tagal) dengan Metode Pembibitan menggunakan Substrat yang Berbeda di Pulau Serangan, Denpasar, Bali Alvin Agus Prambudy; I Wayan Restu; Ni Putu Putri Wijayanti
Current Trends in Aquatic Science Vol 6 No 1 (2023)
Publisher : Program Studi Manajemen Sumberdaya Perairan, Fakultas Kelautan dan Perikanan, Universitas Udayana

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This research was conducted to determine the growth pattern and percentage of survival as well as the growth rate of mangrove species Bruguiera gymnorrhiza and Ceriops tagal per unit time using different types of substrates This study used a completely randomized design (CRD) with five treatments) by 5 technique for example, Handling A with 100% sand substact, Handling B with 100% soil substract, Handling C with 50% soil and sand substract, Handling D with 30% sand and 70% soil substract, and Handling E with 70% sand and 30% soil substract, and 10 repetitions. Measurements were carried out every week starting after 1 week of planting for 2 months. Parameters observed were plant height, plant diameter, number of leaves, mangrove survival and mangrove growth rate. Quantitative data were analyzed statistically by ANOVA. The results of Bruguiera gymnorrhiza species has height between 8,87-27,88 cm, growth rate range 1,11-1,17 cm/week, diameter of growth 0,07-0,14 cm, and number of leaves as much 3-5 sheet, while mangrove results of Ceriops tagal has height between 0,76-1,42 cm, growth rate range 0,10-0,18 cm/week, diameter of growth 0,02-0,08 cm, and number of leaves as much 1-2 sheet for 8 weeks. The results showed that mangrove nurseries using a combination of substrates did not give a significant difference to the growth pattern, survival percentage and mangrove growth rate.

Intensitas dan Prevalensi Parasit Pada Insang Ikan Nila yang dibudidayakan di Balai Benih Ikan (BBI) Sentral Sangeh I Gusti Ayu Agung Purnama Sari; Pande Gde Sasmita Julyantoro; Dewa Ayu Angga Pebriani; Endang Wulandari Suryaningtyas
Current Trends in Aquatic Science Vol 6 No 2 (2023)
Publisher : Program Studi Manajemen Sumberdaya Perairan, Fakultas Kelautan dan Perikanan, Universitas Udayana

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Parasites in the body of cultivated fish will cause harm to the fish, because the parasites take nutrients from their hosts, it is necessary to study the intensity and prevalence of parasites in tilapia (Oreochomis niloticus) in order to determine the density of parasite attacks and the percentage of parasites in tilapia. Samples of tilapia (Oreochomis niloticus) were taken from the Central Sangeh Fish Seed Center (BBI). The research was conducted for 3 months from October 4th 2022 to December 13 2022 randomly sampling. Samples of tilapia (Oreochomis niloticus) examined were 36 samples of Nila Nirwana fish. The parasites found in the external organs (ectoparasites) were only found in the tilapia gills, while for the internal organs (endoparasites) parasites were not found in both the stomach and intestines of the fish. The ectoparasites found were Dactylogyrus sp. (2181 ind) and Gyrodactylus sp. (157 ind). The highest intensity was in the genus Dactylogyrus of 60.6 ind/fish including the severe category, while for the genus Gyrodactylus of 4.4 ind/head including the low category. The highest prevalence value was in the genus Dactylogyrus with 92% in the always category while in the genus Gyrodactylus it was 78% in the usual category. This studyâ€™s supporting data for water quality includes temperature, pH, DO, and ammonia. Where temperature during the study ranged from 28-30oC, pH or acidity ranged from 7.6-8.5, and DO or dissolved oxygen ranged from 7.3-8.4 mg/L. The water quality result in this study were normal for fish farming.

Kondisi Sosial Ekonomi dan Nilai Tukar Nelayan (NTN) Slerek di Pelabuhan Perikanan Nusantara (PPN) Pengambengan, Bali Serly Ayu Ulandari; I Wayan Restu; I Ketut Wija Negara; Bagus Sudananjaya; Made Ageng Astika
Current Trends in Aquatic Science Vol 6 No 1 (2023)
Publisher : Program Studi Manajemen Sumberdaya Perairan, Fakultas Kelautan dan Perikanan, Universitas Udayana

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This study aims to determine the socio-economic conditions and welfare level of slerek fishermen based on the Fisherman's Exchange Rate (NTN). Primary data was collected through interviews, observations and questionnaires with the criteria of fishermen using purposive sampling, where the number of samples was 110 respondents based on the slovin formula. The results of the study found 5 positions of slerek fishermen, namely 4 as stage mans, 10 as helmsmans, 6 as mechanics, 3 as tinsmiths and 87 as crews. Social conditions show the productive age range of fishermen between 19-59 years by 93.4%, with a relatively low level of education, namely elementary school graduates by 40.9%, then the highest number of family dependents is to bear 3 people by 36.3%. For access to health, 66.3% of respondents mostly used puskesmas as a place for treatment, by 77.2% of respondents having BPJS cards, then 91.8% had no history of illness and 94.5% of fishing families rarely got sick. The economic condition based on the highest income level of fishermen is in the position of a stage mans because it has a profit-sharing system of 3-4 times. The welfare level of the 5 positions of slerek fishermen based on NTN in April - May 2022 shows NTN ? 1, which means that slerek fishermen are declared prosperous. While the INTN results show a value of 100, which means that there is no development in the NTN value

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Contact Name
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Journal Mail Official
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Location
Kota denpasar,

Bali

INDONESIA