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Pendekatan Ekosistem pada Pengelolaan Perikanan Lemuru Skala Besar Melalui Penilaian Domain Teknik Penangkapan Ikan di Perairan Selat Bali Arip Arip; I Wayan Restu; Made Ayu Pratiwi
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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Fishery activities Sardinella lemuru in the waters of the Bali Strait are the largest source of economy for fishermen in Pengambengan, Jembrana Regency, Bali. The purpose of this study was to determine the condition of the lemuru fishery in the Pengambengan Fishing Port by assessing the domain of fishing techniques in fisheries management using an ecosystem approach (EAFM). The results of the assessment of the indicators of destructive and/or illegal fishing methods get a score of 3, the indicator of modification and fishing aids gets a score of 1, the indicator of fishing capacity and fishing effort gets a score of 3, the selectivity of fishing gets a score of 3, the suitability of functions and the size of the vessel according to legal documents get a score of 1 and fishing boat crew certification following regulations gets a score of 1. Based on the results of the composite score, the value obtained is 73.33 which means that the lemuru fishery in Pengambengan Fishing Port based on the fishing technique domain is good with a colored flag model light green.

Hubungan Postur Ikan dengan Jumlah Endoparasit pada Ikan Tongkol (Auxis rochei) yang Didaratkan di Pantai Kedonganan, Bali Annisa Millenia Putri; Pande Gde Sasmita Julyantoro; Dewa Ayu Angga Pebriani
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 various types of parasites that infect tuna, their abundance, prevalence, level of parasite intensity and the effect of fish length on the number of parasitic infections. Fish samples were obtained from Kedonganan Beach, Bali from November-December 2021. This study used a descriptive method and data collection using simple random sampling. The total samples examined were 35 fish. The endoparasites found in the internal organs of fish which include the intestines, liver, and gonads consist of 3 different genera, namely: Rhadinorhynchus sp., Anisakis sp., and Lecithocladium sp. The highest abundance was found in the genus Rhadinorhynchus sp., the highest prevalence was found in the genus Rhadinorhynchus sp., and the highest intensity level was found in the genus Lecithocladium sp. The relationship between length and number of parasites was classified as "very weak" because the correlation between the two relationships ranged from 0.00-0.199. So, it can be concluded from the research that has been done related to the relationship between fish posture and the number of endoparasites that infect the tuna (Auxis rochei) which was landed on the beach of Kedonganan, Bali. There is no relationship between fish body posture and the number of endoparasite infections or can be classified into the category of a "very weak" relationship.

Identifikasi Sampah Laut (Marine Debris) di Pantai Petitenget, Bali Cindy Claudya Br Sembiring; Devi Ulinuha; Ni Luh Gede Rai Ayu Saraswati
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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Marine debris has caused various problems to the environment, including transporting contaminants and invasive species. Moreover, it also, has an impact on socio-economic of coastal community and on the sustainability of marine biota and its cosystem. The aim of this research is to identify the characteristics and quantity of waste generation (weight, composition, and density) in Petitenget Beach. The study was conducted from October to December 2022. The data collection method was carried out by purposive sampling based on Ministry of Environment and Forestry 2020 Beach Waste Monitoring Guidelines. The results showed that the majority types of macro-inorganic waste found on Petitenget Beach were plastics, which was categorized as foamed plastic, glass, rubber, cloth, metal, and other materials. For this type of inorganic waste, meso-inorganic waste consists of plastic and foamed plastic. Plastic has the highest mass, waste composition and density of inorganic waste found on Petitenget Beach, 0.2017 gr/mÂ², 93,5% and 0.0733 items/mÂ², respectively. Overall, this study shows that plastic waste has polluted both beaches with high mass, amount, type composition, and density. The oceanographic conditions during the study, namely the highest current speed occurred in November, namely 0.7 m/s, the wave height of the sea water at Petitenget Beach during the study period ranged from 1.1 m-2.5 m. The highest water movement at high tide reaches 2.17 m and at low tide reaches 0.25 m.

Analisis Laju Pertumbuhan Karang Acropora sp. Hasil Transplantasi di Pantai Geger Bunga Divia Arimbi; I Wayan Arthana; Ni Made Ernawati
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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Coral transplantation is one of the efforts to rehabilitate a damaged coral reefs. The successful growth of transplantation is influenced by water quality. This study aims to determine the relation between water quality parameters and the growth rates of Acropora sp. transplantation in Geger Beach. This research was conducted for 3 months during February until Aprils 2022, carried out in every 2 weeks at difference point. The observations was measuring length, width, high, and the increased of total corals fragment. The results showed the averages of length growth rate is 1.39 mm/2 weeks on each points. While the high growth rate on point 1 and 2 had a 0.14 mm/2 weeks different high, and each point had a values of 0.61 mm/2 weeks and 0.76 mm/2 weeks. On the width growth rate, each of point had a values of 2.06 mm/2 weeks and 1.50 mm/2 weeks, with 0.56 mm/2 weeks difference. The average of increased total corals fragment has the same growth, with 2 fragment at each point. The quality of waters in Geger Beach supported the growth of coral transplantation with temperatures ranging from 29.50-29.60 Â°C, brightness of 100%, depth of 0.97-1.1 m, currents of 0.16-0.18 m/s, salinity of 33.33-33.16â€°, pH of 7.80-7.87, and DO of 6.27-6.29 mg/l. The results of Pearsonâ€™s test showed that waters parameters have correlations and significant relationship with the growth rates of Acropora sp., with all the values of signification is more than 0.05.

Keseragaman dan Kondisi Karang Family Acroporidae di Kukusan Besar, Labuan Bajo, Flores, Nusa Tenggara Timur Johannes Lumban Tobing; I Wayan Arthana; 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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Kukusan Besar, Labuan Bajo, which is located in East Nusa Tenggara is one of the fertile waters that was a diversity of marine biota in the form of coral reefs. The purpose of this study was to determine the uniformity and condition of corals, especially the corals of the Acroporidae Family. This research was carried out from November 2021â€“April 2022. Determination of coral data collection points used a purposive sampling method. Retrieval of coral data using the underwater photo transect (UPT) method, with the transect spread along 50 meters in the direction of the coastline at every point of depth of 3, 5 and 7 meters. Underwater photos were analyzed using CPCe software. Coral cover at a depth of 3 meters is 29.12%. The depth of 5 meters is 36.54% and at a depth of 7 meters is 42.18%. At depths of 3 and 5 meters the corals of the Acroporidae family are dominated. The highest diversity index is found at a depth of 7 meters with a value of 2.20. The highest uniformity index was found at a depth of 5 meters with a value of 0.69. Family Acroporidae at a depth of 3 and 5 meters found 4 genera namely Acropora, Montipora, Astreopora and Anacropora, while at a depth of 7 meters there were only 2 genera namely Acropora and Montipora.

Pengaruh Pemberian Pakan Pelet dan Artemia sp. terhadap Kualitas Warna Ikan Badut (Amphiprion ocellaris) Rai Ayu Ratri Chandra Pandunita; Pande Gde Sasmita Julyantoro; 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 study aims to determine the effect of different feeding on the color quality and growth of clown fish. The feed used in the form of pellets nd Artemia sp. with three treatments and three repetitions. The treatments used were pellet feed (treatment A), Artemia sp feed. (treatment B), and the combination feed of pellet feed and Artemia sp. (treatment C). The research method used is experimental method using Completely Randomized Design (CRD). This research was conducted at PT Agung Aquatic Marine for 1 month October until November. This study used 18 clown fish fed 3 times a day with a dose of 1.5 g of Fengli pellets and 1.5 ml of Artemia sp. for one administration. The parameters measured in this study was color quality parameters. Parameter measurements were carried out once a week. The media used was a aquarium with a volume of 2500 ml with a size of 40 Ã— 30 cm. Color quality parameters are measured with a color chart paper base called M-TCF and then ranking according to the numbers on the paper. The results of this study showed that the quality of the body color of clown fish fed pellet feed, Artemia sp. feed, and combination feed faded. Based on the results of the research that was tested by ANOVA analysis, it can be concluded that this different feeding had no significant effect (P>0.05) on the color quality of clown fish.

Pengaruh Penggunaan Poly Aluminium Chloride (PAC) terhadap Air Limbah Budidaya Ikan Nila Ima Yudha Perwira; Devi Ulinuha
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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Nile Tilapia culture is potential to provide waste containing high organic matter and turbidity. Therefore, it is important to perform waste water treatment on this culture to reduce the environmental polution risk caused by this activity. This study aimed to reduce the organic material amount and other substances in the waste water of Nile Tilapia culture by using Poly Aluminium Chloride (PAC). The study was performed experimentally by using 4 treatments: PAC 0 mg/L (control), PAC 10 mg/L, PAC 15 mg/L, and PAC 20 mg/L. Total organic matter (BOT) was measured using permanganate method, water turbidity was measures using Turbidimeter, total suspended solids (TSS) was measured using Gravoimetric method, ammonia was measured using Nessler method, nitrite was measured using NED dihydrochloride-Sulfanilamide method, nitrate was measured using cadmium-reduction method, and phosphate was measured using Ascorbic acid method. The study showed that PAC 15 and 20 mg/L drastically reduced the BOT and turbidity (>30%), while the reduction of TSS was not more than 25%. Ammonia, nitrite, nitrate, and phosphate were not influenced by the application of PAC.

Analisis Laju Pertumbuhan Karang Acropora sp. Pada Transplantasi Di Pantai Pandawa dan Pulau Serangan, Bali Diah Eka Pratiwi; Ni Luh Watiniasih Watiniasih; Made Ayu Pratiwi Ayu Pratiwi
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 growth rate of Acropora corals with the relationship of water parameters at Pandawa Beach and Serangan Island. Coral growth rate in this study was measured by the increase in coral width, fragment width, height, and total number of coral fragments. The results showed that the growth of Acropora sp. corals in Serangan Island experienced a faster increase with Pandawa Beach. Based on the correlation results that the water quality at Pandawa Beach and Serangan Island has a correlation relationship to the growth rate of Acropora sp. corals. water quality parameters at Pandawa Beach and Serangan Island are in accordance with the quality standards of seawater for marine biota. The water quality parameters of Pandawa Beach and Serangan Island are in accordance with the quality standards set by the Decree of the Minister of Environment No. 51 of 2004 concerning Seawater Quality Standards for marine biota. Based on the results of water quality research for 3 repetitions and taken every 2 weeks, the characteristics of water quality values at Pandawa Beach are temperature values of 26.2 - 28.5, brightness of 100%, depth of 0.8-1.5m, salinity of 32-34â€°, current speed of 0.1-0.2m/s, pH of 7.7-7.9, Do of 6-7.6. The characteristic values of water quality in Serangan Island are temperature of 27.7-30.1, brightness of 50-75%, depth of 2.4-2.8m, salinity of 31-33â€°, current speed of 0.2-0.3m/s, pH of 7.7-7.9, Do of 4.6-7.6.

Teknik Budidaya Lele Dumbo (Clarias gariepinus) dengan Sistem Booster Putri Nurhanida Rizky; Daniel Bona Simamora; Moh. Zainal Arifin; Nazran Nazran
Current Trends in Aquatic Science Vol 7 No 1 (2024)
Publisher : Program Studi Manajemen Sumberdaya Perairan, Fakultas Kelautan dan Perikanan, Universitas Udayana

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Booster system fish farming has been widely used by cultivators since 2014. Booster system farming is a way of cultivating fish by emphasizing water, feed and health management applications to reduce the risk of crop failure. This study aimed to examine the production performance and cultivation techniques of African catfish with a booster system on an industrial scale, without experimental design. Feed management in this cultivation system is carried out by adding grotop boosters, aquavita premix boosters and progol boosters in 1 kg of feed. The average weight of African catfish when stocking was 6.03 ± 0.06 g/fish with a density of 2,025 in 4 concrete pond units. This studies showed after 77 days of culture, the highest fish weight gain was in pond T4 of 80.17 ± 0.56 g/fish, followed by T2 of 79.94 ± 0.97 gr/fish, T1 of 78.92 ± 0 .91 gr/fish, and T3 of 78.27 ± 0.33 gr/fish. The survival rate in this study was also high where the survival rate was >90% with an FCR value of 1.2.

Pola Pertumbuhan Rumput Laut pada Lokasi Tanam yang Berbeda di Perairan Pantai Pandawa, Bali Bona Rizky Simanungkalit; Pande Gde Sasmita Julyantoro; Ayu Putu Wiweka Krisna Dewi
Current Trends in Aquatic Science Vol 7 No 1 (2024)
Publisher : Program Studi Manajemen Sumberdaya Perairan, Fakultas Kelautan dan Perikanan, Universitas Udayana

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Seaweed cultivation is one of the leading commodities in the fishing sector and is still occupied by most coastal communities. One of the types of seaweed that can be cultivated is Eucheuma cottonii. One of the areas in Badung Regency that was once a place for seaweed cultivation is the South Kuta District, Badung Regency, Pandawa Beach, to be exact. The problem most often faced by seaweed cultivators is that seaweed cannot grow properly. The cause of seaweed not being able to grow properly occurs due to predators eating the seaweed thallus. Therefore, a study was conducted to determine the appropriate location on the Pandawa Beach for the cultivation of seaweed Eucheuma cottonii. The research method was carried out by planting Eucheuma cottonii seaweed in 3 different locations seen from the distance from the tourism position (water sport) in the waters of Pandawa Beach, first location in the water sport area, second location is 100 m to the west of the one location, third location is 100 m to the west of two location. The results of this study indicate that the average weight of seaweed at location 1 in the first to sixth week range 119,6 g – 399,7 g, location 2 range 121,80 g – 413,5 g, and at location 3 it ranged 123,35 g – 430,75 g. The Growth Rate (SGR) at Location 1 is 3,3%, Location 2 is 3,37%, and Location 3 is 3,47.%.

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Kota denpasar,

Bali

INDONESIA