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All Journal Journal of Marine and Aquatic Sciences Buletin Udayana Mengabdi Jurnal Bakti Saraswati Jurnal Pengelolaan Perikanan Tropis (Journal Of Tropical Fisheries Management) Current Trends in Aquatic Science Journal of Marine Research and Technology Samakia: Jurnal Ilmu Perikanan TRITON : Jurnal Manajemen Sumberdaya Perairan Advances in Tropical Biodiversity and Environmental Sciences PAPALELE : Jurnal Penelitian Sosial Ekonomi Perikanan dan Kelautan Ulil Albab
I Ketut Wija Negara
Program Studi Manajemen Sumberdaya Perairan, Fakultas Kelautan Dan Perikanan, Universitas Udayana
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Journal : Current Trends in Aquatic Science

 1 
Kandungan Nitrat, Fosfat, dan Silikat di Perairan Pantai Pandawa, Bali Mila Jeniarti; Ima Yudha Perwira; I Ketut Wija Negara
Current Trends in Aquatic Science Vol 4 No 2 (2021)
Publisher : Program Studi Manajemen Sumberdaya Perairan, Fakultas Kelautan dan Perikanan, Universitas Udayana

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Abstract

This study aimed to measure the concentration of nitrate, phosphate, and silicate in the water of Pandawa Beach waters. This study was conducted at the Kutuh Village (Badung, Bali, Indonesia), from December 2019 to January 2020. The water sample was collected from the location every week for one month. The water sample was taken from the surface, middle, and bottom of the water. Measurement of nitrate and silicate was performed using Salifert KIT Nitrate and Silicate, while measurement of phosphate was performed using Hanna 713 KIT analysis. The result showed that concentration of nitrate in the Pandawa Beach Waters was ranging from 0,91 to 2,00 mg/L. Concentration of phosphate was ranging from 0,32 to 1,93 mg/L, while silicate was ranging from 0,07 to 0,52 mg/L.
Identifikasi dan Potensi Hasil Tangkapan Pukat Cincin (Purse Seine) pada Kapal Supala Sari di Perairan Kabupaten Buleleng I Ketut Wija Negara; Dewa Ayu Angga Pebriani
Current Trends in Aquatic Science Vol 2 No 1 (2019)
Publisher : Program Studi Manajemen Sumberdaya Perairan, Fakultas Kelautan dan Perikanan, Universitas Udayana

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Abstract

The sustainable potential of fish capturing in Buleleng sea waters is 14.243,3 tons/year which consist of large-pelagic, small-pelagic, demersal, and other reef fish. This research was conducted to identify the catch of purse seine in Buleleng Regency, then found out the potential of capture fisheries resources. The location of this research was carried out around the waters of Buleleng Regency. It also involved fishing base of fishing fleet which is located at Fishing Base (PPI) of Sangsit. This research was conducted from May to August 2018. Fish identification resulted from purse seine during purse seine fishing gears are 8 species, namely Auxis thazard, Decapterus macarellus, Rastrelliger kanagurta, Caranx sexfasciatus, Elagatis bipinnulata, Canthidermis maculata, Kyphosus cinerasces dan Acanthocybium solandri. The composition and potential of the catch obtained during the purse Purse Seine is the most dominant are Auxis thazard and Decapterus macarellus. The total catch of Auxis thazard is 5.943 and Decapterus macarellus are 4.741 kg. The potential for fishing in the region of Buleleng Regency by using Purse Seine fishing gear is very large with the number of 10.903 kg in 5 times of operation.
Analisa Usaha Penangkapan Ikan dengan Longline pada KM. Hiroyoshi 6 Milik PT. Intimas Surya di Benoa, Bali Diah Ayu Safitri; I Wayan Restu; I Ketut Wija Negara
Current Trends in Aquatic Science Vol 2 No 2 (2019)
Publisher : Program Studi Manajemen Sumberdaya Perairan, Fakultas Kelautan dan Perikanan, Universitas Udayana

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Abstract

This study objectives is to analyze longline fisheries business, by analyzing business feasibility aspects and operational costs and business income. The method used is descriptive quantitative, and determining respondent by purposive sampling. The data collection process is carried out for 3 months. MS. Hiroyoshi 6 which is based in Benoa Harbor which is a wooden ship measuring 120 GT, with longline fishing gear. In one year the ship can make 6 trips. The composition of the catch consists of 9 types of fish, which are dominated by tuna. The investment costs incurred are Rp. 2,750,000,000, and operating costs are Rp. 805,410,000 in one year. The average boat production yield is 73,407 kg, with revenues of Rp 4,157,275,000 and profits of Rp 1,559,465,000. The results of the business feasibility analysis, payback period 1.7, B / C ratio 1.6, and Break Even Point units of 25,000 kg and Break Even Point sales of Rp 1,415,852,000. Based on the results of the analysis, the longline fisheries business is feasible to continue.
Analisis Kelayakan Usaha Penangkapan Ikan Teri (Stolephorus sp.) Nelayan Tradisional di Desa Sanggalangit, Kecamatan Gerokgak, Kabupaten Buleleng, Provinsi Bali. Ni Kadek Dwi Widyanti Putri; I Wayan Restu; I Ketut Wija Negara; I Gede Wahyu Surya Wirawan
Current Trends in Aquatic Science Vol 4 No 1 (2021)
Publisher : Program Studi Manajemen Sumberdaya Perairan, Fakultas Kelautan dan Perikanan, Universitas Udayana

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Abstract

Sanggalangit is one of the villages in Gerokgak District, Buleleng Regency, Bali Province. This village located at the coastal area. The main catch of fishermen in there is anchovy (Stolephorus sp.). The feasibility analysis of anchovy fishing business by traditional fishermen in Sanggalangit aims to determine the condition of the fishing business and analyze the feasibility of anchovy fishing business in Sanggalangit. This research took place from December 2019 to January 2020. Primary data were obtained by interview and direct observation in the field. Sampling was done by purposive sampling for 30 times fish landing (30 trips). Based on the data obtained, the fishing business classified as small scale (traditional) with a profit sharing system. Profit sharing system were 50% for owner's fishermen and 50% for working fishermen. Investment costs incurred in the amount of Rp. 58,200,000. The fixed cost per trip is Rp. 70,529 and the average variable cost per trip is Rp. 425,708. Average revenue per trip Rp. 706,417 with a profit Rp. 210,179. The value of the Production BEP is 2,156 kg and the Sales BEP is Rp 37,275,815 in a year. Analysis of R /C Ratio obtained a value of 1.42 shows that the business is feasible to run and can provide benefits. Payback Period value 1.32 shows that the category of initial capital return is relatively fast.
Tingkat Kematangan Gonad dan Fekunditas Abalon (Haliotis squamata) Dewa Ayu Angga Pebriani; I Ketut Wija Negara
Current Trends in Aquatic Science Vol 2 No 2 (2019)
Publisher : Program Studi Manajemen Sumberdaya Perairan, Fakultas Kelautan dan Perikanan, Universitas Udayana

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Abstract

This study aimed to find out the relationship between the maturity level of female abalone gonads with fecundity and egg diameter size of abalone. The results obtained showed that abalone having gonadal maturity level 1 was in the range of 3-4.5cm; gonadal maturity level 2 in the range size of 4.6-6 cm; and gonadal maturity level 3 in the size range> 6 cm. The results of the abalone gonad histology test showed that abalone with gonadal maturity level 1 had more ootid distribution than the primary oocyte. gonadal maturity level 2 has more ootid distribution, primary oocytes than secondary oocytes. Whereas in gonadal maturity level 3 it appears that secondary oocytes dominate which means the gonads are mature and ready to be spawned. The oocyte diameter is getting bigger and more similar simultaneously with an increasing level of gonad maturity. Abalone with gonadal maturity level 1 has an average oocyte diameter of 187 ?m gonadal maturity level 2 of 190 ?m, and gonadal maturity level 3 of 217 ?m.Abalone fecundity for gonadal maturity level 1 ranged from 60,480-86,190 oocytes; TKG 2 ranges from 196,560-214,520 oocyte grains; and TKG 3 ranges from 483,600-518,880 oocyte grains. Based on the results obtained, it can be concluded that the higher the level of maturity of the abalone gonad, the greater the fecundity with the distribution of more secondary oocytes seen in the results of the gonad abalone histology test.
Analisa Kelayakan Usaha Purse Seine pada KM Bintang Bahagia 6 di Pelabuhan Umum Benoa, Provinsi bali Maria Angelina Vicario Tonga; I Wayan Restu; I Ketut Wija Negara
Current Trends in Aquatic Science Vol 3 No 2 (2020)
Publisher : Program Studi Manajemen Sumberdaya Perairan, Fakultas Kelautan dan Perikanan, Universitas Udayana

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Abstract

This study objectives is to determine how the condition of the purse seine fishery business and also to determine the feasibility of the purse seine fisheries business in Benoa Public Port. In this study the method used is descriptive quantitative method. The data analysis method used is by calculating income, depreciation, and business profits, then to find out the business feasibility calculated the value of the payback period, B / C ratio, break event point. The primary data taken is data belonging to KM Bintang Bahagia 6 which is in the form of fish catch data per trip for 1 year, investment costs, fixed costs and variable costs, while secondary data is taken from the literature as well as data from the Directorate General of Marine Resources and Fisheries in the form of data on the number of purse seine fleets and the number of catches of purse seine vessels in Benoa Public Port. The condition of the fisheries business with purse seine fishing equipment in Benoa Public Port can be categorized as still quite good. This can be seen from the large number of operating fleets and the catches obtained are still relatively stable. The value of the payback period obtained is 1.1, B / C ratio 1.6, and BEP units of 99,433 kg and BEP sales of Rp 2,165,557,791. With this analysis, it can be stated that purse seine fisheries are feasible.
Analisa Kualitas Air di Sungai Pelus, Purbalingga, Jawa Tengah Rizki Andrianto; Ima Yudha Perwira; I Ketut Wija Negara
Current Trends in Aquatic Science Vol 4 No 1 (2021)
Publisher : Program Studi Manajemen Sumberdaya Perairan, Fakultas Kelautan dan Perikanan, Universitas Udayana

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Abstract

The purpose of this study was to determine the level of water quality in the Pelus River, Purbalingga Regency, Central Java. Water sampling is carried out in the upstream, middle and downstream sections, from June 2019 to July 2019. The water sample was then analyzed for the content of water quality parameters including COD and BOT measured using permanganate-based Titrimetry method, DO is measured using the Winkler method, TSS is measured using the Gravimetric method, then the TDS is measured using a TDS meter, Turbidity is measured using a Turbidity meter, then Nitrate and Phosphate are measured using the Spectrophotometry meth od, and water pH is measured using a pH meter. The results showed an increase in the value of water quality temporally and spatially ie (COD 28-43 mg/L, BOT 8.4-11.3 mg/L, DO 7.3-5.7 mg/L, TSS 32-65 mg/L, TDS 98-168 mg/L, Turbidity 7.2-12.7 NTU, Nitrate 0.8-1.4 mg/L, Phosphate 0.3-0.5 mg/L and pH 6.8-6.6). Temporal and spatial increase in the value of water quality, allegedly due to rainfall and high atropogenic activity in the Pelus River. Keywords: Pelus River; water quality; pollution; Purbalingga
Penambahan Tepung Udang Rebon (Krill Meal) Untuk Meningkatkan Pertumbuhan Ikan Maskoki (Carassius auratus). Abrar Ravidhia; Pande Gde Sasmita Julyantoro; I Ketut Wija Negara; Sukarman Sukarman
Current Trends in Aquatic Science Vol 2 No 1 (2019)
Publisher : Program Studi Manajemen Sumberdaya Perairan, Fakultas Kelautan dan Perikanan, Universitas Udayana

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Abstract

Penelitian ini bertujuan untuk mengetahui pengaruh penambahan tepung udang rebon (krill meal) untuk peningkatan pertumbuhan Ikan Maskoki (Carassius auratus). Penelitian yang dilakukan bersifat eksperimental menggunakan Rancangan Acak Lengkap (RAL) dengan 5 perlakuan dan 3 kali ulangan. Perlakuan S0 (kontrol) dilakukan dengan tanpa penambahan tepung udang rebon, sedangkan perlakuan S1, S2, S3, dan S4 masing-masing dilakukan dengan penambahan 5%, 10%, 15%, dan 20% tepung udang rebon (krill meal). Perlakuan dilakukan dengan menambahkan tepung udang rebon (krill meal) pada pembuatan pakan sesuai dengan dosis tiap perlakuan. Pemberian pakan dilakukan 3 kali sehari selama 42 hari pengamatan di Balai Riset Budidaya Ikan Hias Depok. Pengamatan parameter pertumbuhan dilakukan pada awal dan akhir penelitian berupa parameter berat (W mutlak), laju pertumbuhan spesifik, panjang standar (L mutlak), dan efisiensi pemanfaatan. Hasil uji statistik (one way ANOVA) menunjukkan bahwa penggunaan tepung udang rebon (krill meal) berpengaruh nyata terhadap peningkatan pertumbuhan (p<0,05) Ikan Maskoki. Pertumbuhan optimum terdapat pada perlakuan 15% penambahan tepung udang rebon (krill meal) dengan perubahan parameter berat (W mutlak) sebesar 0,58 g, laju pertumbuhan spesifik sebesar 0,44%/hari, panjang standar (L mutlak) sebesar 0,45 cm, dan efisiensi pemanfaatan pakan sebesar 18,37%. Hal ini mengindikasikan bahwa penambahan tepung udang rebon (krill meal) mampu meningkatkan pertumbuhan Ikan Maskoki (Carassius auratus).
Analisis Efisiensi Saluran Pemasaran Ikan Teri (Stolephorus sp.) di Desa Sanggalangit, Kabupaten Buleleng Lingga Nurmalasari; I Wayan Restu; I Ketut Wija Negara; I Wayan Sudana
Current Trends in Aquatic Science Vol 4 No 1 (2021)
Publisher : Program Studi Manajemen Sumberdaya Perairan, Fakultas Kelautan dan Perikanan, Universitas Udayana

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Abstract

The location for the research is decide in Sanggalangit Village, Gerokgak District, Buleleng Regency, Bali. The highest production species in the coast of Sanggalangit Village, Buleleng Regency is Anchovy. The village is chosen because there are a lot of fisherman whos active to catch and do the Anchovy’s marketing. The aim of this research is to know the condition of marketing channels and analysis the marketing channels efficiency of Anchovy in Sanggalangit Village. This research is held on December 2019 until January 2020 with qualitative and quantitative methods by observation and interviews. Interviewed with the fisherman, the institution of marketing such as the collecting trader and the retailer. The share margin analysis and farmer’s share as a tool to know the marketing channels efficiency. The marketing channels that occurs in Sanggalangit Village is from the fisherman, to the collecting trader and then to the retailer, until to the customer’s hand. The share margin from this Anchovy’s marketing channels is obtained Rp. 13.000/kg where the margin from the fisherman with the collecting trader is Rp. 3.800 and the margin from the collecting trader with the retailer is obtained Rp. 9.200/kg. The amount of farmer’s share is 56,67 %. The marketing efficiency value is 15,18 %, which is mean the marketing channels efficiency of Anchovy in Sanggalangit Village is efficient.
Co-Authors A.A. Ketut Agung Cahyawan W Abdul Razak Abrar Ravidhia Ade Ruly Sumartini Andi Mannojengi Anesa Ronavia Bagus Sudananjaya Bagus Sudananjaya Bon, Veronika Tiadora Dewa Ayu Angga Pebriani Dhananjaya, I Gusti Ngurah Agung Diah Ayu Safitri Diah Ayu Safitri Dita Dwi Ayu Isukadana Endang Wulandari Suryaningtyas Hutagaol, Larasati I Gede Suyoga I Gede Wahyu Surya Wirawan I Gusti Ngurah Putra Dirgayusa I Wayan Gde Yogiswara Darma Putra I Wayan Nuarsa I Wayan Restu Ima Yudha Perwira Indriyani, Ni Made Vita Kadek Adi Chandra Kusuma Kartika, I Wayan Darya Lingga Nurmalasari Maria Angelina Vicario Tonga Marsoedi Marsoedi Mila Jeniarti Naibaho, Trijun Sariwaty Ni Desak Nyoman Pradnyani Ni Kadek Dwi Widyanti Putri Ni Made Putri Handayani Ni Made Vita Indriyani Ni Putu Putri Wijayanti Nyoman Dati Pertami Pande Gde Sasmita Julyantoro Pebriani, Dewa Ayu Angga Putra, I Wayan Gde Yogiswara Darma Riska Purwanto Rizki Andrianto Siahaan, Jonathan M Siti Helis Pipi Hidayana Siti Zubaidah Sukarman Sukarman Sumartini, Ade Ruly Suprabadevi Ayumayasari Saraswati Suprabadevi Ayumayasari Saraswati Suprabadevi Ayumayasari Saraswati Suprabadevi Ayumayasari Saraswati, Suprabadevi Ayumayasari Wijayanti, Ni Putu Putri Wisnu Kawirian