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Journal : Journal of Marine Research and Technology

Laju Pertumbuhan dan Tingkat Kelangsungan Hidup Transplan Karang Lunak Lobophytum strictum, Sinularia polydactyla dan S. asterolobata Pada Lokasi Budidaya Berbeda Putu Agus Arisudana; I Wayan Arthana; Widiastuti Widiastuti
Journal of Marine Research and Technology Vol 4 No 1 (2021): FEBRUARI 2021
Publisher : Department of Marine Sciences, Faculty of Marine Science and Fisheries, Udayana University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/JMRT.2021.v04.i01.p01

Abstract

Soft corals are the second-largest group of biotas that consist of coral reef ecosystem other than hard corals. The ecology function of soft coral such as a place to live and shelter various types of fish, soft coral also has a high economic value as an export commodity for the ornamental aquarium and the potency in pharmacology. The great economy potency can urge to uncontrolled natural taken. One of the alternatives is by culturing with transplantation method. Environment and different growth responses among soft coral species are the factors that shows the success method research used. The aims of this research were to examine the average growth rates of different transplanted soft coral species, culturing location, and the presence of interaction between different species of transplanted soft coral and culturing location towards growth rates. The average survival rates of different species of transplanted soft corals that cultured in a different location. Culturing location was located inside and outside of Pegametan bay, Buleleng regency. There were three soft coral species Lobophytum strictum, Sinularia polydactyla and S. asterolobata with five replicates each. The soft corals were fragmented with initial size ± 25 cm2 then sewed to the cement substrate. It was placed randomly to the transplant table at different culturing locations. The increased size of each transplanted soft coral species, the number of survivals and environmental parameters were observed in every two weeks for 12 weeks. Results showed that the average growth rates of soft corals significantly differed among species (P<0.05), whereas the average growth rates of transplanted L. strictum were the lowest among others. In contrast, the average growth rates of transplanted S. polydactyla, and S. asterolobata were not significantly different (P = 0.100) at all locations. The average growth rates of all transplanted soft corals were significantly lower when cultured inside the bay (P<0.05). It is found that the different average growth rates of transplanted soft corals were due to the interaction between soft coral species and location. The results also demonstrated that the average survival rates were significantly varied among transplanted soft coral species (P<0.05). All transplanted soft corals cultured outside of the bay reached 100% survival rates. It is suggested that the morphology and anatomy of each soft coral species and environmental conditions contribute to the success of soft corals transplantation.
Respon Pertumbuhan dan Konsentrasi Klorofil–a pada Kultur Mikroalga Chaetoceros gracilis terhadap Perbedaan Suhu Kultur Ni Luh Putu Citra Adriyanti; I Wayan Arthana; Widiastuti Widiastuti
Journal of Marine Research and Technology Vol 4 No 1 (2021): FEBRUARI 2021
Publisher : Department of Marine Sciences, Faculty of Marine Science and Fisheries, Udayana University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/JMRT.2021.v04.i01.p06

Abstract

Microalgae Chaetoceros gracilis is widely used in aquaculture. Its culture highly depends on environmental factors, particularly temperature. This study aimed to examine the growth rate and its growth trend of C. gracilis, also chlorophyll-a concentration at different temperature. cultures were incubated at 25, 30 dan 340C for seven days using Na media with three replicates. Cell density was counted every day using a hemocytometer, whereas the concentration of chlorophyll-a was measured in spectrophotometry method. The differences in growth rates and chlorophyll-a concentration at different temperatures were statistically analyzed with One-Way ANOVA. The difference variables were further tested with the Tukey HSD test. The trend of the growth and duration of C. gracilis at 25 and 30 0C were similar, with the lag phase (three days), logarithmic (two days), stationary (one day), and declination (one day), in contrast at 34 0C that had lower duration and missed the stationary phase. The growth rates of microalgae C. gracilis was insignificantly differences at the temperature of 25 and 30 0C (0.7±0.05 cell/ml/day), but significantly lower at 340C (0.28±0.03 cell/ml/day). The chlorophyll-a concentrations at the temperature of 25 and 30 0C were not significantly different (0.37±0.05 and 0.39±0.03 mg/l), while the chlorophyll-a concentration at 34 0C was significantly lower (0.26±0.04 mg/l). This result indicates the high temperature (34 0C) inhibited the metabolism of C. gracilis as shown by doubling times that slower (2.5 day) than the temperature at 25 and 30 0C. It is concluded that the optimum temperatures for the C. gracilis were 25 and 30 0C, where as 340C was the inhibited temperature.
Korelasi Kepadatan Banggai Cardinal Fish (Pterapogon kauderni) dengan Biota Asosiasi (Diadema setosum dan Fibramia thermalis) di Perairan Teluk Gilimanuk, Bali Stephanus Tambunan; I Wayan Arthana; I Nyoman Giri Putra
Journal of Marine Research and Technology Vol 5 No 1 (2022): FEBRUARI 2022
Publisher : Department of Marine Sciences, Faculty of Marine Science and Fisheries, Udayana University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/JMRT.2022.v05.i01.p04

Abstract

Banggai cardinal fish (Pterapogon kauderni) is a marine fish native to Indonesia. P. kauderni is listed as an endangered species in the red list category by the IUCN. P. kauderni is very dependent on microhabitats in the form of benthic animals (symbionts), namely sea urchins, sea anemones, and hard corals. Besides P. kauderni, other fish from the family Apogonidae also live in association with sea urchins. The purpose of this study was to examine the density of P. kauderni and associated biota and to calculate the density correlation between P. kauderni associated biota in the waters of Gilimanuk Bay, Bali. This study uses a modification of the Belt Transect method, with a transect of 50 meters long and 2.5 meters wide to the left and right. The total density of sea urchins was 0,088 ind/m2, the total density of Fibramia thermalis was 0,021 ind/m2, and the total density of P. kauderni was 0,071 ind/m2. Between P. kauderni and sea urchins there is a correlation with the value of r = 0,711 and a P-value of 0,031 < 0,05 which indicates that the large number of sea urchins will affect the number of P. kauderni in the waters. The correlation between density of P. kauderni and Fibramia thermalis worth r = 0,509 with P-value of 0,160 > 0,05, which means that the number of Fibramia thermalis has no effect on the number of P. kauderni.
Tingkat Kesejahteraan Nelayan Tradisional di Pantai Bias Lantang Desa Seraya Timur, Kabupaten Karangasem, Bali Luh Putu Diah Ananda Wijayanti; I Wayan Arthana; Gede Surya Indrawan
Journal of Marine Research and Technology Vol 6 No 1 (2023): FEBRUARI 2023
Publisher : Department of Marine Sciences, Faculty of Marine and Fisheries, Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/JMRT.2023.v06.i01.p07

Abstract

Most of the people living on the coast of Bias Lantang Beach, East Seraya Village, work as fishermen with the main catch being of tongkol. This research conducted to gain an insight about the welfare of traditional fishermen and exchange rate of fishermen (NTN) Coast of Bias Lantang Seraya Timur, Karangasem, Bali using BPS indicator and NTN. The population in this study research are all traditional fishermen that are on the Coast of Bias Lantang Seraya Timur. Sampling of these studies is done using calculations from Slovin analysis. As for the method used in this research is case study method with a descriptive analysis, in which data collection is done using a questionnaire and presented in the form of a chart. The results from the prepared questionnaire's data indicate the level of traditional fishermen's welfare and the NTN that was calculated using a NTN. According to BPS, as known traditional fishermen on Bias Lantang Beach Seraya Timur Village had a high score of welfare rates (high range of score 15-21) with total score 18. Whereas based on the NTN it is known that the value of the traditional fishermen on Bias Lantang Beach Seraya Timur Village is 0.95 while the results of NTN<1 showing that traditional fishermen tend to possess a low welfare rated. As a result, there is a difference between the traditional welfare of fishermen on the Bias Lantang Seraya Timur Village used the BPS indicator and the use of NTN. This is because of the welfare of traditional fishermen using BPS indicator methods such as income, expenses, education, health, place, facilities, and status of ownership, wherefrom the seven indicators four indicators had a high score of indicator (score 3). Whereas NTN consists of two indicators (income and expenses), where the expenses of fishermen are bigger than the income.
Studi Laju Sedimentasi di Muara Sungai Perancak Menggunakan Pemodelan Numerik Pandu Pratama Putra; I Wayan Arthana; I Gede Hendrawan
Journal of Marine Research and Technology Vol 6 No 2 (2023): AGUSTUS 2023
Publisher : Department of Marine Sciences, Faculty of Marine and Fisheries, Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/JMRT.2023.v06.i02.p11

Abstract

Perancak is an estuary area with land use in mangroves and ponds. Land changes that have occurred at the Perancak River estuary and tidal flooding in recent years have increased the potential for sedimentation problems that can cause silting of the riverbed. This study aims to determine the sedimentation rate and identify the potential for siltation in the estuary of the Perancak River. Sediment modeling uses the Finite Volume Coastal Ocean Model (FVCOM) by entering primary and secondary data such as bathymetry, tides, temperature, salinity, river discharge, sediment type, and Total Suspended Solid (TSS) concentration. Modeling for 33 days (January - February 2022). The results showed that the sedimentation rate in the Perancak River estuary ranged from 0.25 to 18.8 kg/m2/day, with an average of 3.83 kg/m2/day. Sedimentation rates are high in the estuary areas and riverbanks bordering the mainland. The potential for siltation shows that it occurs at river mouths with a silting value of about 0.01 m/year to more than 0.05 m/year.
Co-Authors A.A. Gede Cahya Pratama Abd. Rahman As-syakur Agus Wija Atmaja Aida Sartimbul Alfi Hermawati Waskita Sari Alya Namira Anak Agung Sagung Laksmi Dewi apri i supi'i Arief Reza Fahlevi Ayu Putu Wiweka Krisna Dewi Bejo Slamet Beny Mustofa Bram Setyadji Bunga Divia Arimbi Cakranegara, Pandu Adi Candra Saputra CoK.I.M. HANDAYANI Daniel Nemba Dambe Daniel Tri Lakona Sinamo Debi Bunga Novitasari Deny Suhermawan Yusup Deptson Baringin Silaen Desak Putu Risky Vidika Apriyanthi Dewa Ayu Angga Pebriani Dewa Gde Tri Bodhi Saputra Dwi Suprapti Elok Faiqoh Endang Rustiasih Endang Wulandari Suryaningtyas Fanlia Prima Jaya Fikri Huda Falah Fina Wahyuningsih GALIH INDRAWATI Gde Raka Angga Kartika Gde Raka Angga Kartika Gede Dwi Sukmawantara Gede Pasek Sutedja Gede Surya Indrawan Gemaya Wangsa Gultom, Henry Casandra Gunawan Tarigan Gusti Ayu Manik Pradnyani Habibatus Sholihah Hanifa Miranda I.H. Putri Heidi Siddiqa Heri Prabowo Herlisa Setiarini Hikmah Nurazizah Husnayati Hartini I Dewa Gede Warmadewa I Dewa Nym. Nurweda P., I Gede Agus Isha Purusa I Gede Hendrawan I Gede Surya Risuana I Gede Wahyu Surya Wirawan I Gusti Agung Bagus Arya Pradnya Pratama I Gusti Agung Dwikhy Oka Taradhipa I Gusti Ayu Diah Hendiari I Gusti Ayu Novie Sidaningrat I Gusti Bagus Suputra I Gusti Made Sudipta I Kadek Tobing Ascahya I Ketut Swardika I Komang Dianto I Made Adi Karsa I MADE ADI PRANATHA I Made Minggu Widyantara I MADE SUDARMA I Made Suma Krisna Sravishta I Made Suwitra, I Made I Nyoman Gede Sugiartha I NYOMAN MERIT I Nyoman Sudipa I Nyoman Sumardika I Nyoman Sutama I Nyoman Sutama I Nyoman Yoga Parawangsa I Putu Eka Mahendra I Putu Yoga Pramana Putra I W BUDIARSA SUYASA I Wayan Gede Astawa Karang I Wayan Juliawan I Wayan Kasa I Wayan Restu I Wayan Sandi Adnyana I Wayan Suarna I Wayan Subawa I Wayan Wesna Astara IDA AYU ASTARINI Ida Ayu Putu Widiawati Ida Ayu Utari Dewi ida bagus adi palguna Ida Bagus Ketut Gede Kertia Ida Bagus Lampita Prabawa Ida Bagus Windia Adnyana Ifan Martin Nopem IPG ARDHANA IRMA YULIA MADJID Joko Wiryatno Josua Siagian Josua Siagian KADEK ARY ANGGRAENI KADEK ARY ANGGRENI Kartika, I Wayan Darya Karyono Karyono Khadijah Irania Kolis Pratama Komang Bayu Permana Komang Gede Pramantara Komang Lina Rosita Sugiarni Krisna Jumantara Panca Putra Letia Alda Fadilla Lisa Rosalia Prayuda Ludia Panggalo Luh Putu Diah Ananda Wijayanti Luh Putu Sudini M Alfian Pratama M. Sudiana Mahendra Made Ayu Pratiwi Made Widya Sekarbuana Mayang Utami Meta Apriliawati Sandi Miftachudin Syaiful Ma'ruf Mohammad Rizqi Mohan Budiman MOKHLAS SATIBI Mu'tasim Billah Muh. Abduh Anwar Muhammad Asir Muhammad Sawir Muhammad Yusuf Ni Desak Putu Dita Herlinawati Ni Kadek Suardiani Ni Komang Rai Widhyaningsih Ni Luh Ayu Gita Astriani Ni Luh Ayu Gita Astriani Ni Luh Gede Ambarawati Ni Luh Gede Rai Ayu Saraswati Ni Luh Made Ari Sugianthi Ni Luh Putu Citra Adriyanti Ni Luh Watiniasih Ni Made Ary Widiastiti Ni Made Ernawati, Ni Made Ni Made Putri Kartika Jati Ni Putu Ayustin Krisnati Dewi Ni Putu Bella Yuliana Dewi Ni Putu Putri Wijayanti Ni Putu Sawitri Nandari Ni Putu Vivin Nopiantari Ni Putu Wiwin Angreni Ni Wayan Desy Wahyudiati Ni Wayan Ernawati NI WAYAN FEBRIANA UTAMI Ni Wayan Indah Purnamawati Nyoman Dati Pertami Octria Vesensia Olivia Grace Brigitta Florencia Pandu Pratama Putra Putra, I Nyoman Giri Putri Eka Cahyani Putri Febrine Nainggolan Putri Nilakandi Perdanawati Pitoyo Putu Agus Arisudana Putu Ayu Irma Wirmayanti Putu Dyah Prastiti Sukma Febriany Putu Suryani . Rachmat Andi Saputra Rani Ekawaty Ranny R. Yuneni Ravita Kusuma Dewi Rifaldus Dani S.A NYOMAN PUTRI TRIANTINI Sang Ayu Indah Sukma Dewi Stephanus Tambunan Suciati - SUCIKA ARMIANI, SUCIKA Suko Ismi Supardiono Supardiono Suprabadevi Ayumayasari Saraswati Suprabadevi Ayumayasari Saraswati Suprabadevi Ayumayasari Saraswati Suprabadevi Ayumayasari Saraswati SUPRATMAN - suryawan, Gusti Bagus Susumu Kanno Syachry Banun Takahiro Osawa Takahiro Osawa Takahiro Osawa Teguh Prayogo Widiastuti Widiastuti Widiati, Ida Ayu Putu Yoga Ibnu Graha Yuli Krisnawati YUNALDI YUNALDI Yuniarti K. Pumpun