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All Journal Journal of Marine and Aquatic Sciences Bumi Lestari Jurnal Kelautan : Indonesian Journal of Marine Science and Technology Jurnal Sumberdaya Akuatik Indopasifik Acta Aquatica: Aquatic Sciences Journal Current Trends in Aquatic Science Advances in Tropical Biodiversity and Environmental Sciences Sricommerce: Journal of Sriwijaya Community Services Jurnal Media Akuakultur Indonesia Journal of Fisheries & Marine
Gde Raka Angga Kartika
Program Studi Manajemen Sumberdaya Perairan (Department Of Aquatic Resources Management) Universitas Udayana
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Laju Pertumbuhan Ikan Nila (Oreochromis niloticus) pada Tiga Sistem Resirkulasi yang Berbeda Yessica Christin; I Wayan Restu; Gde Raka Angga Kartika
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

Recirculation aquaculture system can be used to maintain the water quality during fish maintenance. This research aimed to determine the growth rate and survival rate of Tilapia (Oreochromis niloticus) by used three different recirculation system. The treatments are recirculation without filter (control), a biofilter system (bioball) and aquaponic systems (using water spinach and caisim). During eight weeks, the resulted of research showed the highest growth rate of Tilapia (Oreochromis niloticus) in biofilter treatment amounted for 4.58%/day followed by the control treatment for 4.09%/day and the lowest in aquaponic treatment for 3,81%/day. The best survival rate of Tilapia (Oreochromis niloticus) during the research contained in aquaponic treatment followed by biofilter treatment and the lowest value was in control treatment. During the research, of aquaponic treatment gave survival rate for 78.7%, biofilters 74.8% and control treatment for 63.5%. There were no significant differences (P > 0,05), between parameters for growth while survivl rate was significant (P < 0.05). The parameters of water quality include temperature, potential hidrogen (pH), dissolved oxygen (DO) and total dissolved solids (TDS). The quality range of water in all treatments generally described that the range were still running in tolerance for growth and survival rate of Tilapia.
Pemanfaatan Seledri (Apium graveolens) dan Tanaman Mint (Mentha piperita) Dalam Sistem Akuaponik di KJA Danau Batur Komang Lina Rosita Sugiarni; I Wayan Arthana; Gde Raka Angga Kartika
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

Penelitian ini bertujuan untuk mengetahui manfaat tanaman hidroponik jenis tanaman Seledri (Apium graveolens) dan tanaman Mint (Mentha piperita) pada Keramba Jaring Apung di Danau Batur mengunakan konsep akuaponik. Pengambilan data pertumbuhan tanaman dilakukan selama 2 bulan dari Bulan Desember 2018 – Januari 2019. Pengukuran dilakukan untuk parameter tinggi tanaman, jumlah batang, jumlah daun dan kualitas air. Tanaman Seledri dan Tanaman Mint dapat hidup pada Keramba Jaring Apung dengan pH air danau sangat basa (8,5). Tanaman seledri memiliki pertumbuhan lebih baik dibandingkan dengan tanaman mint. Tanaman seledri dapat hidup sampai minggu ke 8, sedangkan tanaman mint hanya dapat hidup sampai minggu ke 4. Hal ini mungkin dikarenakan oleh cuaca buruk serta gelombang yang tinggi. Nilai pH pada tanaman seledri dan tanaman mint pada minggu 1 hingga minggu ke 5 sebesar 8,4 – 8,9 sedangkan pada minggu ke 7 dan minggu ke 8 menunjukkan nilai pH sebesar 6,3 – 7,7. Nilai TDS pada tanaman seledri tidak mengalami fluktuasi secara signifikan, sedangkan pada tanaman mint dengan kepadatan 4 tanaman/0,16 m2 nilai TDS di minggu 1 tinggi dan pada minggu ke 7 nilai TDS pada kepadatan 2 tanaman/0,16 m2 mengalami kenaikan. Pada area sekitar Keramba Jaring Apung memiliki suhu perairan yaitu 25.4 °C – 27 °C. Selama 2 bulan suhu mengalami fluktuasi akibat kondisi cuaca yang berubah-ubah pada saat melakukan pengukuran suhu.
Jenis Makanan dan Area Makan Ikan Tongkol Abu-abu (Thunnus tonggol) yang didaratkan di PPI Kedonganan pada Musim Barat Putu Niken Ayu Saraswati; Pande Gde Sasmita Julyantoro; Gde Raka Angga Kartika
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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Kedonganan Fish Landing Port is part of Bali Strait which is one of longtail tuna habitat. There was no study about biological parameters on longtail tuna in Bali Strait especially in Kedonganan fish landing port. This study aims to determine fullness gastric contents of the longtail tuna landed at the Kedonganan Fish Landing Port and find out the composition and type of food contained in the stomach of the longtail tuna. This research was carried out for 5 months from October 2018 to January 2019. Analysis data used included percentage of 1 type of food, frequency of occurrence and index of gastric fullness. The results showed that the type of food found in the longtail tuna gut were small fish, squid and dissolved food. The frequency of occurrence of small fish has a percentage 80.5%, which means small fish is the main food of longtail tuna. The highest gastric fullness index was in November 2018 which showed that in November 2018 longtail tuna was actively looking for food. Longtail tuna is actively looking for food, but the eating activities decreased which is suspected at that time the availability of food decreased because of southwest monsoon. The food that contained in the longtail tuna gut were small fish, squid and dissolved food. Longtail tuna is a carnivorous fish because its main food was small fish and can be classified as stenophagic. Longtail tuna usually looking for food in the area around Uluwatu, Nusa Dua and Takacamung
Keanekaragaman Jenis dan Sebaran Ikan di Danau Buyan Bali I Gusti Agung Dwikhy Oka Taradhipa; I Wayan Arthana; Gde Raka Angga Kartika
Current Trends in Aquatic Science Vol 1 No 1 (2018)
Publisher : Program Studi Manajemen Sumberdaya Perairan, Fakultas Kelautan dan Perikanan, Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (829.062 KB) | DOI: 10.24843/CTAS.2018.v01.i01.p08

Abstract

Buyan lake is one of the lake in bali, located in pancasari village, sukasada, buleleng. Lack of research on the identification and distribution of fish species in buyan lake. Therefore, it is necessary to conduct research on the identification and distribution of fish species in the buyan lake. This research is take place in pancasari village, sukasada, buleleng. This research is conducted from january to march 2018. Sampling is done 3 times in 3 month. Location determination by using purposive sampling with 4 stations. The fish catch is done by using the gill net with the size 1cm, 5cm and 6,5cm and bubu. The type of fish in this research is 7 type with the total of the catch is 1024 fish. The fish that get biggest share is nyalian srembeng fish that can meet in every research station smallest share is ikan mas that can meet only in station 1, 2 and 3. The variant of fish that located in buyan lake is one of the mid category. uniformity fall into the low category and domination fish include low category.
Aspek Reproduksi Ikan Tongkol Abu-Abu (Thunnus tonggol) Yang Didaratkan Di Pelabuhan Pendaratan Ikan Kedonganan Hanif Abdullah; I Wayan Restu; Made Ayu Pratiwi; Gde Raka Angga Kartika
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

Longtail tuna is one of the most important pelagic fish species found in Indo-Pacific waters, living in neritic areas. This study aimed to know about reproduction aspect of Longtail Tuna such as gonado somato index, fecundity and length of first maturity. This research was carried out for 5 months from October 2018 to January 2019. The research was conducted in Kedonganan fish landing port. Data analysis that used was the level of gonad maturity, gonad maturity index, fecundity, sex ratio and length of gonad maturity. Longtail tuna at Kedonganan fish landing port actively reproduce in October 2018. The highest value of maturity index of the gonad in October 2018 at Kedonganan fish landing port, shows that in that month is the peak of spawning season. This is in accordance with the number of fish caught more at the size of gonad maturity level III and IV in that month. Longtail tuna’s fecundity is around 18.000-24.000. Fish sex ratio of male and female is unbalanced. Differences in the number of Male and female is suspected because of differences in fish areas in spawning and foraging. The first length of maturity (Lm) of longtail tuna in the waters of the Kedonganan fish landing port were 488-496 mm fork length.
Fluktuasi Kualitas Air Budidaya Ikan Nila (Oreochromis niloticus) dengan Beberapa Variasi Sistem Resirkulasi M Alfian Pratama; I Wayan Arthana; Gde Raka Angga Kartika
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

Water quality has considerable influence on the survival rate and growth of Tilapia in aquaculture waters. Good environment is required for fish growth and survival rate. Recirculation aquaculture system can be used to maintain the optimal quality of water during fish maintenance. The working principle of recirculation system is reuse water repeatedly so the temperature, oxygen and other distributions more evenly distributed. This research aims to determine the water quality fluctuation that occurs in aquaculture of Tilapia with unfiltered recirculation system (control), biofilters system (bioball) and aquaculture system (using water spinach and pakchoy). The measured water quality parameters include temperature, potential hidrogen (pH), dissolved oxygen (DO), turbidity and total dissolved solids (TDS). The results of six repetitions on control treatment, biofilter treatment and aquaponic treatment showed pH values range from 7-8, dissolved oxygen from 6-8.5 ppm, temperature from 28-30 ° C, total dissolved solid from 250- 500 ppm, and turbidity values range from 0.5 to 6 NTU. The statistic result showed significant differences (P<0,05), between parameters for temperature, pH, dissolved oxygen, and turbidity, while parameter total dissolved solids there were no significant differences (P>0,05). The best water quality results showed for aquaponic treatment because values of water quality tend to be stable for fish growth.
Produktivitas Primer Fitoplankton pada Daerah Penangkapan Ikan di Taman Wisata Alam Danau Buyan, Buleleng, Bali Ni Kadek Suardiani; I Wayan Arthana; Gde Raka Angga Kartika
Current Trends in Aquatic Science Vol 1 No 1 (2018)
Publisher : Program Studi Manajemen Sumberdaya Perairan, Fakultas Kelautan dan Perikanan, Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (657.635 KB) | DOI: 10.24843/CTAS.2018.v01.i01.p02

Abstract

This research aims to identify productivity value of phytoplankton’s net primary as well as its relation within parameter of physics, chemistry, and aquatic biology to the productivity value of phytoplankton’s net primary in the waters of Lake Buyan Nature Park. Measurement of primary phytoplankton productivity is conducted by using bright and dark bottle method. The taking of lake water samples for measurement of phytoplankton primary productivity and measurement of supporting parameters namely physics (temperature, brightness, turbidity), chemistry (pH, nitrate, phosphate) and biology (phytoplankton abundance) were carried out at four research stations in the fishing area. Data analysis used in this research is correlation analysis among parameters of physic, chemistry, and aquatic biology to the net primary productivity value of phytoplankton by using the PAST 3.1 application. The obtained result showed that the value of net primary productivity ranged from 76.39 to 211.46 mgC / m3 / day and the parameters of physics, chemistry and aquatic biology have a relationship with net primary productivity of phytoplankton. Brightness, abundance of phytoplankton, nitrate, temperature, dissolved oxygen, pH and phosphate which are positively correlated with net primary productivity of phytoplankton while water turbidity is negatively correlated with it. Parameters that have a strong to very strong relationship with net primary productivity are dissolved oxygen, temperature, nitrate, phytoplankton abundance, and water brightness.
Potensi Probiotik Skala Rumah Tangga untuk Meningkatkan Laju Pertumbuhan Ikan Nila (Oreochromis niloticus) Ni Luh Ayu Gita Astriani; I Wayan Arthana; Gde Raka Angga Kartika
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

Aplikasi probiotik merupakaan salah satu metode alternatif untuk meningkatkan laju pertumbuhan ikan. Tujuan dari penelitian ini adalah untuk mengetahui pengaruh pemberian probiotik terhadap laju pertumbuhan ikan dan mendapatkan dosis optimum untuk Ikan Nila (Oreochromis niloticus). Bakteri yang digunakan dalam probiotik ini yaitu L. bulgaricus, Lactobacillus acidophilus dan Streptococcus thermophillus dengan kepadatan bakteri asam laktat 1.3 x107 CFU/ml. Penelitian ini bersifat eksperimental dengan menggunakan Rancangan Acak Lengkap (RAL) yang terdiri dari empat perlakuan dan tiga kali pengulangan yaitu perlakuan I (10 ml/kg pakan), perlakuan II (15 ml/kg pakan), perlakuan III (20 ml/kg pakan) dan kontrol (tanpa probiotik). Data pertumbuhan dianalisis menggunakan metode One Way ANOVA (Analysis of Variance) dengan program Statistical Product and Service Solution (SPSS) yang dilanjutkan dengan Uji Duncan pada taraf kepercayaan 95% Hasil laju pertumbuhan berat mutlak tertinggi terdapat pada perlakuan II yaitu 3,31 gram/28 hari, diikuti oleh perlakuan I 3,03 gram/28 hari, perlakuan III 2,82 gram/28 hari, dan kontrol 2,37 gram/28 hari. Laju pertumbuhan spesifik tercepat terdapat pada perlakuan II yaitu 4,95 %/hari, perlakuan I 4,70 %/hari, perlakuan III 4,54 %/hari dan kontrol 4,21 %/hari. Tingkat kelulushidupan tertinggi terdapat pada kontrol yaitu 97,78%, diikuti oleh perlakuan III yaitu 91,11%, perlakuan II 80% dan perlakuan I yaitu 71,11%. Tingkat konversi pakan (FCR) terbaik terdapat pada perlakuan II karena memiliki FCR terendah yaitu sebesar 0,98, kontrol 1,03, perlakuan III 1,04 dan perlakuan I yaitu 1,29. Perlakuan II merupakan dosis optimum untuk Ikan Nila karena mengahasilkan laju pertumbuhan dan FCR terbaik, serta tingkat kelulushidupan (SR) yang masih diatas perlakuan I.
Pertumbuhan Ikan Tongkol Abu-Abu (Thunnus tonggol) yang Didaratkan di Pangkalan Pendaratan Ikan (PPI) Kedonganan Muhammad Alfiansyah Mahmud; I Wayan Restu; Made Ayu Pratiwi; Gde Raka Angga Kartika
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

Longtail Tuna fish (Thunnus tonggol) is one of economically important fish in the Bali Strait. The aim of this study was to assess the growth study of Longtail Tuna fish in the Bali Strait so as to provide an overview of the conditions and threats of Longtail Tuna fish landed at PPI Kedonganan. The study was conducted in November 2018 - January 2019. Data analysis consist of species composition, distribution of long frequencies, patterns and parameters of growth. Data processing was performed using Microsoft Excel and FISAT II. The results shown that Longtail Tuna fish landed at PPI Kedonganan included in fishermen's by-catchs and have a range of 418 mm - 643 mm. Longtail Tuna fish landed at PPI Kedonganan have growth pattern that is negative allometric (length increase is more dominant than weight gain) and parameters of growth asymptotic length (Loo) is equal to 675.15 mm with growth coefficient (K) is 0.10/month in and a life span is 164 months.
Pertumbuhan Tanaman Pisang-pisang (Heliconia psittacorum) dan Papirus (Cyperus haspan) di Area Keramba Jaring Apung, Danau Batur I Gusti Bagus Suputra; I Wayan Arthana; Gde Raka Angga Kartika
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

Penelitian ini bertujuan untuk mengetahui perkembangan tanaman Pisang-pisang (Heliconia psittacorum) dan tanaman Papirus (Cyperus haspan) dengan kepadatan yang berbeda pada Keramba Jaring Apung di Danau Batur. Penelitian ini dilaksanakan di Desa Trunyan pada bulan Desember 2018 sampai Januari 2019, dilakukan pengambilan data setiap minggunya dalam waktu 2 bulan. Pengukuran tinggi, penghitungan jumlah daun dan bunga dilakukan secara insitu. Hasil penelitian menunjukan bahwa tanaman pisang-pisang dan papirus dapat hidup dan berkembang disekitar area Keramba Jaring Apung. Tanaman pisang-pisang dengan kepadatan 4 tanaman/wadah menunjukan pertumbuhan 5.3 Cm/ 2 bulan yang lebih baik dibandingkan dengan kepadatan 2 tanaman/wadah dan 8 tanaman/wadah, sedangkan tanaman papirus dengan kepadatan 2 tanaman/wadah menunjukan pertumbuhan 6 Cm/ 2 bulan lebih baik dibandingkan dengan kepadatan 4 tanaman/wadah dan 8 tanaman/wadah. Survival rate pisang-pisang pada semua kepadatan adalah 100%, sedangkan survival rate tanaman papirus kepadatan 2 tanaman/wadah dan 8 tanaman/wadah adalah 100% sedangkan untuk kepadatan 4 tanaman/wadah adalah 67%. Tanaman pisang-pisang yang memiliki nilai relative growth rate tinggi adalah kepadatan 4 tanaman/wadah yaitu 0.2 %/hari dan nilai terendah pada kepadatan 8 tanaman/wadah yaitu -0.13%/hari, untuk kepadatan 2 tanaman/wadah dengan nilai 0.14%/hari, sedangkan untuk tanaman papirus dengan nilai relative growth rate tertinggi pada kepadatan 2 tanaman/wadah yaitu 1.32%/hari dan nilai terendah pada kepadatan 4 tanaman/wadah yaitu 0.71%/hari, untuk kepadatan 8 tanaman/wadah dengan nilai relative growth rate 1.2%/hari.
Co-Authors Aida Sartimbul Astriani, Ni Luh Ayu Gita Ayu Putu Wiweka Krisna Dewi, Ayu Putu Wiweka Krisna Defri Yona Endang Wulandari Suryaningtyas Erfan Rohadi Feni Iranawati, Feni Gede Dwi Sukmawantara Hanif Abdullah Hapsari Mahatmi Hendiari, I Gusti Ayu Diah Hikmah Nurazizah I Gusti Agung Dwikhy Oka Taradhipa I Gusti Ayu Diah Hendiari I Gusti Bagus Suputra I Kadek Mega Mega Dhyana Putra I Made Hendy Wesha Suryawan I Wayan Arthana I Wayan Arthana I Wayan Restu Indra Nur Cahyati Irania, Khadijah Khadijah Irania Komang Lina Rosita Sugiarni Krisnati Dewi, Ni Putu Ayustin Letia Alda Fadilla M Alfian Pratama Made Ayu Pratiwi Muhammad Alfiansyah Mahmud Ni Kadek Suardiani Ni Luh Ayu Gita Astriani Ni Luh Ayu Gita Astriani Ni Made Ernawati, Ni Made Ni Made Sita Aditya Putri Ni Putu Ayustin Krisnati Dewi Ni Wayan Desy Wahyudiati Nurul Muslihah Nyoman Dati Pertami Pande Gde Sasmita Julyantoro Putu Niken Ayu Saraswati Rachmat Andi Saputra Shanti Paramita Jayanti Soelistyowati Soelistyowati Sri Andayani Susanto, Raden Dwi Taradhipa, I Gusti Agung Dwikhy Oka W Widodo Wenny Aberti Manurung Widodo S Pranowo Winata, Victor Adi Yessica Christin