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All Journal Jurnal Ilmiah Elektronik Infrastruktur Teknik Sipil Jurnal Ilmiah Teknik Sipil Journal of Marine and Aquatic Sciences Omni-Akuatika Journal of Marine Research and Technology TRITON : Jurnal Manajemen Sumberdaya Perairan Ulil Albab
I Gusti Ngurah Putra Dirgayusa
Program Studi Ilmu Kelautan, Fakultas Kelautan Dan Perikanan, Universitas Udayana, Kabupaten Badung, Bali - Indonesia
Religion Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Civil Engineering, Building, Construction & Architecture Earth & Planetary Sciences Economics, Econometrics & Finance Education Environmental Science Social Sciences

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Struktur Komunitas dan Bioakumulasi Logam Berat Timbal (Pb) pada Teripang di Pantai Tanjung Benoa, Badung, Bali Kadek Widya Suryaningsih; I Gusti Ngurah Putra Dirgayusa; I Nyoman Giri Putra
Journal of Marine Research and Technology Vol 3 No 2 (2020): AGUSTUS 2020
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.2020.v03.i02.p08

Abstract

High shipping activity in Tanjung Benoa beach has caused a strong possibility of heavy metal contamination to the marine ecosystems. Heavy metal in the water will process a deposition which causes an accumulation to the body of marine biotas especially to the filter feeders such as sea cucumber. This research aims to determine the community structure of sea cucumber and to calculate the bioaccumulation of lead (Pb) content in sea cucumber. Sampling activity was conducted at four sites located in Tanjung Benoa, Bali. At each site, a transect method was performed to assess the community structure of sea cucumber like density, diversity, and species composition. Meanwhile, the analysis of heavy metal was conducted by Atomic Absorption Spectrophotometer. In this research, we found 151 sea cucumbers which is come from five species such as Holothuria scabra, H. edulis, Synapta maculata, H. atra, H. leucospilota. The highest level of density was found in site one (0.0104 ind/m2) and the lowest was found in siten four (0.0034 ind/m2). The highest level diversity index was found in site three (0,37) and the lowest was in site two (0,14). The highest level of uniformity index was found in site three (0,21) and the lowest was in site two (0,01). The highest level of dominance index was found in site two (0,94) and the lowest was site three (0,85). The species composition was dominated by S. maculata which is represents 94.03% of the total species found in Tanjung Benoa. The number of bioaccumulation factor (BCF o-s) showed that the accumulation of Pb is categorized as deconcentrator category or low accumulation level since the number of the bioconcentration factor is less than one. While the number of bioconcentration factor (BCFo-w) is categorized as a low category since the number is less than 100. Therefore, it can be concluded that biota which categorized as a filter feeder such as sea cucumbers, can accumulate heavy metal (Pb) indeed with the low accumulation level
PERBANDINGAN LAJU PERTUMBUHAN RUMPUT LAUT (EUCHEUMA COTTONII) DENGAN MENGGUNAKAN SISTEM BUDIDAYA CO-CULTURE DAN MONOCULTURE DI PERAIRAN PANTAI GEGER, NUSA DUA, BALI Riris Christiani Gultom; I Gusti Ngurah Putra Dirgayusa; Ni Luh Putu Ria Puspitha
Journal of Marine Research and Technology Vol 2 No 1 (2019): FEBRUARI 2019
Publisher : Department of Marine Sciences, Faculty of Marine Science and Fisheries, Udayana University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (461.032 KB) | DOI: 10.24843/JMRT.2019.v02.i01.p02

Abstract

Seaweed is a low level plant that can not be distinguished between the roots, stems and leaves so-called thallus. In seaweed cultivation process, seaweed farmers use monoculture system. But with the growing knowledge there is a more profitable system that is with the co-culture system. The co-culture system is a cultivation system that combines species from different trophic levels in the same system and considers environmental sustainability. The existence of co-culture system is believed to help fishermen in increasing income and overcome environmental problems due to the results of cultivation activities that are not utilized. This research was conducted for 42 days on May 2, 2018 - June 13, 2018 in the waters of Coast Geger, Nusa Dua, Bali. The method used is the RAL method (Completely Randomized Design) using three treatments and three replications. The monoculture cultivation system as a control and co-culture cultivation system with different density of abalone is 20 and 40 abalone consists of 10 seeds of seaweed with the same initial weight of 100 grams. The results showed that the highest seaweed-specific growth rate between the monoculture system and the co-culture system in cycles 1 and 2 was found in the co-culture system, whereas in cycle 3 the co-culture system experienced lower growth rate due to competition between thallus, the epiphytes attached to the cultivation net of co-culture, large enough current, and the loss of abalone that allegedly taken by the community around the coast. In this study there is also a tip of the thallus that is susceptible to ice-ice disease due to the presence of fish predators.
Struktur Komunitas Ikan Karang di Area Ponton Quick Silver, Perairan Toyapakeh, Nusa Penida Heru Wicaksono; Elok Faiqoh; I Gusti Ngurah Putra Dirgayusa
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.p04

Abstract

The availability of coral reefs as habitat is closely related to the exsistence of coral fish resources in the waters. Coral fish resources are very important for tourism, as an object sought after by tourist because of their diverse and charming colors and shapes. Reef fish abundance depends on coral cover. This research was conducted in February 2020. The percentage of coral cover was collected using the Under Water Potography Transect (UPT) method and the visual census method for reef fish communities at five research stations located in the area of the Quick Silver’s pontoon, Toyapakeh, Nusa Penida with area of 20.000 . Based on the results, the diversity index in the first data collection ranged from 3.18-3.76, which means the diversity isin the high category. On the other hand, the diversity index in the second data collections tends to decrease in the range of 2.66-3.40, which means that the diversity is in the medium to high category. The uniformity index for the first and second data collection falls into the category of distressed communities. The dominances index on the two data found inj the low category. From this research, it was also found that the percentage of live coral cover in the area of use of the Quick Silver pontoon ranged from 0.08% to 17.32%, which means that all research stations were classified as bad. These results indicate that the presence of reef fish is not only caused by live corals but also by anthropogenic activities of the pontoon, such as manual feeding by visitors. This condition applies to reef fish with omnivore eating behavior, one of which is the Pomacentridae family of the major fish group. These anthropogenic activities can change the composition of reef fish communities and increase abundance.
Kandungan Bahan Organik di Sedimen Pada Budidaya Abalon Haliotis squamata dengan Sistem Co-Culture di Pantai Geger Bali Ika Arofa Setiawati; I Gusti Ngurah Putra Dirgayusa; Ni Luh Putu Ria Puspitha
Journal of Marine Research and Technology Vol 2 No 2 (2019): AGUSTUS 2019
Publisher : Department of Marine Sciences, Faculty of Marine Science and Fisheries, Udayana University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (261.755 KB) | DOI: 10.24843/JMRT.2019.v02.i02.p02

Abstract

Marine cultivation is increasing to meet market demand. One of Indonesia's aquaculture commodities is abalone (Haliotis squamata). Improvement of marine cultivation business should pay attention to the impact on the environment. Marine cultivation one of system that considers environmental sustainability is IMTA (Integrated Multi Trophic Aquaculture). The cultivation business gives effect to the water and sediment quality at the cultivation. The purpose of this research is to know whether there is difference of sediment organic matter in cultivation of abalon Haliotis squamata between before and after IMTA system. This research was conducted for 45days at Geger Beach, Badung regency, Bali. The method used in this research is Loss-on-ignition method. The results were analyzed by T-test using SPSS. The results of this research showed that the sediment organic matter before the cultivation process in the sediment was 29,1622% and after 45 days the cultivation process took place with an organic matter content of 31,0052%. The results of statistical analysis of the T-Test that sediment organic matter between before and after 45 days of cultivation process had no significant difference (P> 0.05).
Konsentrasi Logam Berat Timbal (Pb), dan Kadmium (Cd) pada Telur Penyu Lekang (Lepidochelys Olivacea) di Pulau Serangan, Bali Carolina Asrin; I Gusti Ngurah Putra Dirgayusa; Elok Faiqoh
Journal of Marine Research and Technology Vol 3 No 2 (2020): AGUSTUS 2020
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.2020.v03.i02.p05

Abstract

Sea turtles is one of the marine megafauna which has categorized as protected animal. They are able to migrate long distance along the Indian Ocean, Pacific Ocean and Atlantic Ocean. Heavy metals may enter to marine organism bodies through three ways including, food ingestion, gills, and surface diffusion of the skin. Accumulation of heavy metals in the body for a long time may disrupt the circulatory system, nerves and kidney work. The effort to increase the hatching success is very important for the turtle conservation. Therefore, this study was aims to examined the concentration of heavy metals detected in the eggs of olive ridley (Lepidochelys olivacea) turtle.This study was conducted between July - September 2019 in Serangan Island. The method used in this study was a purposive random sampling, determined by four olive ridley’s nests in their nesting period with each nest of 5 egg samples. The heavy metal contents were analyzed with Atomic Absorption Spectrophotometer. The results showed that Pb concentrations ranged from 5.50-103.66 mg/kg with an average of 36.49 mg/kg, while Cd concentrations ranged from 0.07-16.25 mg/kg with an average of 0.96 mg/kg. The concentrations of heavy metals in sea turtle eggs may come from their parent, which might be already accumulated heavy metals in their tissues. This might occur due to the substances in the eggshell are capable to absorb heavy metals. The results of this study highlight the average concentration of heavy metals in L. olivacea eggs exceeded the threshold of heavy metals for egg products set by the Indonesian Regulation of the Food and Drug Control Agency (BPOM) No. 5 of 2018. This indicates that the eggs of Olive ridley sea turtle in the region are unsafe for human consumption. In addition sea turtle eggs are in high risk for human consumption because they contain heavy metals. All types of turtle products are also protected by UU No. 5 of 1990, therefore the culture of the community in consuming and trading turtle products must be stopped.
Laju Penjalaran Rhizoma Lamun Thalassia hemprichii, Cymodocea rotundata, Halophila ovalis, dan Halodule uninervis yang Ditransplantasi Di Serangan Utara, Bali Kadek Weda Ari Bhawana; Elok Faiqoh; I Gusti Ngurah Putra Dirgayusa
Journal of Marine Research and Technology Vol 2 No 1 (2019): FEBRUARI 2019
Publisher : Department of Marine Sciences, Faculty of Marine Science and Fisheries, Udayana University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (517.466 KB) | DOI: 10.24843/JMRT.2019.v02.i01.p04

Abstract

Seagrass is also one of the carbon sinks at sea, and as a catcher of sediments that go to sea so seagrass can be used as a balancer of all marine ecosystems. In the seagrass ecosystem, associate various types of marine biota of significant value with a very high level of diversity. Seagrass is affected by environmental conditions and human activities. Serangan island from the 70s already existing tourism that developed there such as Turtle Waching and Dugong Waching. Dugong (Dugong dugon), a plant-eating mammal or herbivore mammal, the main food is seagrass. the existence of a reclamation project on Serangan Island caused many habitats and marine biota around Serangan Island waters to be damaged and lost, especially seagrass plants. This research to determine the seagrass survival rate if transplanted in the North Serangan waters region and to determine the growth rate of Rhizoma seagrass with Species Thallasia hemprichii , Cymodocea rotundata, Halodule ununervis, and Halophila ovalis transplanted in the waters of North Serangan. This research was conducted in the month of February - April 2018. The research consisted of two stations with one station in a dense region of human activity and the station 2 without any human activity. Seagrass transplantation is done by using frame made of iron with size 1x1 meter. The results showed that at station 1 the level of seagrass survival was lower than station 2, it was caused by the dense human activity at station 1. So was the rate of growth at station 1 lower than station 2. This could also be due to the water quality which is lower at station 1.
Skrining Fitokimia dan Uji Toksisitas Ekstrak Daun Lamun Halophila Ovalis di Perairan Pantai Karma dan Pantai Serangan, Bali Rizky Ramadhan; I Gusti Ngurah Putra Dirgayusa; Elok Faiqoh
Journal of Marine and Aquatic Sciences Vol 7 No 2 (2021)
Publisher : Fakultas Kelautan dan Perikanan Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/jmas.2021.v07.i02.p02

Abstract

Lamun diketahui memproduksi senyawa aktif berupa senyawa metabolit sekunder yang berperan dalam sesi pertahanan hidup baik dari serangan predator maupun kondisi lingkungan ekstrim. Kandungan bahan aktif ekstrak lamun diketahui berpotensi sebagai antikanker dan antifungi. Oleh karena itu penelitian ini bertujuan untuk mengetahui kandungan senyawa aktif dan perbedaan tingkat toksisitas dalam ekstrak lamun Halophila Ovalis di perairan Pantai Karma dan Pantai Serangan. Metode uji toksisitas yang digunakan adalah Brine Shrimp Letal Test (BSLT) dengan menggunakan Arthemia salina sebagai hewan uji. Hasil uji fitokimia yang dilakukan menunjukkan ekstrak daun lamun Halophila Ovalis di Pantai Karma mengandung senyawa bioaktif jenis alkaloid dan tanin, sedangkan ekstrak daun lamun Halophila Ovalis di Pantai Serangan mengandung senyawa bioaktif dari jenis alkaloid, tanin dan triterpenoid. Uji toksisitas dengan metode BSLT yang dilakukan menunjukkan ekstrak daun lamun Halophila Ovalis di Pantai Karma dan Pantai Serangan bersifat tidak toksik, dimana nilai LC50 ekstrak daun Halophila Ovalis pada konsentrasi terendah sampai tertinggi yaitu, (10, 100, dan 1000 ug/ml) tidak memberikan efek kematian 50% terhadap telur Arthemia salina.
Perbandingan Laju Pertumbuhan Abalon (Haliotis squamata) Menggunakan Metode Co-culture Dan Monoculture di Pantai Geger, Nusa Dua, Kabupaten Badung, Bali I Made Subali Arta Arta; I Gusti Ngurah Putra Dirgayusa; Ni Luh Putu Ria Puspitha
Journal of Marine and Aquatic Sciences Vol 7 No 2 (2021)
Publisher : Fakultas Kelautan dan Perikanan Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/jmas.2021.v07.i02.p12

Abstract

Penelitian ini dilakukan di Pantai Geger, Nusa Dua, Bali selama 60 hari. Tujuan penelitian ini adalah Mengetahui perbandingan laju pertumbuhan abalon (Haliotis squamata) dengan sistem budidaya co-culturedan monoculture di perairan Pantai Geger, Nusa Dua, Bali, mengetahui padat tebar abalon yang lebih efektif dilakukan pada sistem co- culture dan mengetahui padat tebar abalon yang lebih efektif dilakukan pada sistem monoculture. Metode yang digunakan menggunakan metode Rancangan Acak Lengkap (RAL) yang terdiri dari empat perlakuan dengan masing-masing perlakuan terdapat sebanyak tiga kali pengulangan. Perlakuan berupa kerang abalon (Haliotis squamata) yang diintegrasikan dengan padat tebar tanam yang berbeda dengan tanam rumput laut yang sama. Hewan uji ditebar setiap keranjang dengan kepadatan 40 ekor dan 20 ekor. Makanan yang diberikan untuk abalone yaitu cotoni sp. yang dimana rumput laut cotoni sp. didapatkan dari hasil budidaya. Berdasarkan perbandingan laju pertumbuhan abalon (Haliotis squamata) pada budidaya co-culture dan monoculture dari segi panjang abalon dengan padat tebar 20 dari sistem budidaya co-culture mendapatkan nilai panjang tertinggi sebesar 2.50%, sedangkan sistem budidaya co-culture dengan padat tebar 40 mendapatkan nilai tertinggi 4.19%. Pada berat abalon Haliotis squamata dengan sistem budidaya co-culture pada padat tebar 20 nilai tertinggi 0.04% dan padat tebar 40 nilai tertinggi pada sistem co-culture sebesar 1.04%. Pada panjang abalon Haliotis squamata dengan sistem monoculture padat tebar 20 mendapatkan nilai yang tertinggi 7.63%, sedangkan padat tebar 40 nilai tertinggi sebesar 1.28%. Pada berat abalon sistem monoculture dengan padat tebar 20 mendapatkan nilai tertinggi sebesar 2.67%, sedangkan padat tebar 40 mendapatkan nilai tertinggi sebesar 0.48%.
Pertumbuhan dan Tingkat Kelangsungan Hidup Donor Transplan Karang Acropora hyacinthus Berdasarkan Ukuran Panjang Awal Fragmen yang Berbeda AAK Aswan Deva; I Gusti Ngurah Putra Dirgayusa; Widiastuti Widiastuti
Journal of Marine and Aquatic Sciences Vol 7 No 2 (2021)
Publisher : Fakultas Kelautan dan Perikanan Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/jmas.2021.v07.i02.p14

Abstract

Coral reefs play significant roles in both aspects of ecology and economy. However its status in Indonesian reefs is mainly moderate to poor condition. One of the alternative way to rehabilitate the damaged coral reef is coral transplantation. Acropora hyacinthus is one of export comodities for ornamental aquarium and important component of reef builder organisms. Studies showed that fragmentation causes stress on the coral donor as indicated by the excessive mucus production which in turn may affect the survival of the coral donors. This study aims to determine the growth and survival rates of donors based on the initial fragment sizes. A total of 5 coral donors of A. hyacinthus with relatively similar branch were fragmented into initial sizes of 30, 50 and 70 mm and the rests were controls. The growth was indicated by the increase in length which measured every two weeks for 12 weeks. The results showed that the absolute growth of coral donors were significantly different among initial sizes. The survival rate in the initial length of 30 mm (100%) was higher than those in 50 mm (80%) and 70 mm (80%).
PENGEMBANGAN EKOWISATA DI PULAU PENYU TANJUNG BENOA BALI BERDASARKAN PRINSIP-PRINSIP EKOWISATA I Putu Oka Saduarsa; I Gusti Ngurah Putra Dirgayusa; Ni Luh Putu Ria Puspitha
Journal of Marine and Aquatic Sciences Vol 8 No 1 (2022)
Publisher : Fakultas Kelautan dan Perikanan Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/jmas.2022.v08.i01.p09

Abstract

The existence of sea turtle in its habitat, especially in Bali is endangered. Moon cot sari sea turtle island is a one of tourist destination that carries out conservation of sea turtles. This turtle island provides more education about turtles to the tourists. Turtle island is still in the developing stage to become an ecotourism destination. Ecotourism defines as a tourism that emphasizes the responsibility of preserving nature, providing economic benefits and maintaining cultural integrity for the local community. The development of turtle island as an ecotourism destination could be evaluated from the implementation of the principles of ecotourism such as education, recreation, society walfare, pasticipation of society. The data was collected using interview by closed question questionnaire and the output of this research is a descriptive value. The questionnaire were used to asses if those principles were already applied in turtle island or not. The total of respondents 450 tourists, 15 person staff and 15 person local community. Sampling is carried out for 1.5 months from January to March 2019 every Sunday according to the high season period on that month. The results found that on average 80% of respondents answered that they have gained insight about sea turtles and better understand about sea turtles conservation (principle of education), 75.5% of respondents answered that the turtle island has adequate facilities to give the impression of a pleasant tour (principle of tourism), 100% of staff and stakeholder respondents said the turtle island had a better economic impact (society walfare), 100% of the society respondents said that they participated in preserving the turtle and the environment of the local mangrove forest ( principle of society participation and conservation).
Co-Authors AAK Aswan Deva Abd. Rahman As-syakur Andreas Pratama Togatorop Basyaasyah Rahmaningrum Pettalolo Br Sitepu, Fany Ekaristy Carolina Asrin Desy Shintya Irene Dwi Budi Wiyanto Elok Faiqoh Febriyanto Arifin Gede Surya Indrawan Heny Hayati Heru Wicaksono I Dewa Nym. Nurweda P., I Dewa Nyoman Nurweda I Gede Hendrawan I Gede Surya Indrawan I Gusti Ayu Dian Indraswari I Gusti Ayu Ricca Mahatma Putri I Gusti Bagus Sila Dharma I Gusti Bagus Sila Dharma I Kadek Aldi Wahyu Andika Maha Putra I Ketut Budiarta I Ketut Wija Negara I Komang Subandi I Made Raditya Putra I Made Rai Januatmika I Made Satya Prayoga I Made Subali Arta Arta I Pande Made Lanang Kertadana I Putu Aditya Budi Wacika I Putu Oka Saduarsa I Wayan Artadana I Wayan Nuarsa Ida Ayu Made Inten Melinia Ida Bagus Ketut Ravidhya Krisna Sekar Ida Bagus Putu Adi Gita Saputra Ika Arofa Setiawati Jenisia Barros Soares Jesikapna Callia Br Guru Singa Kadek Weda Ari Bhawana Kadek Widya Suryaningsih Muhammad Fakhri Ramadhani Ngakan Putu Purnaditya Ni Kadek Apriantari Ni Luh Putu Ria Puspitha Ni Luh Putu Ria Puspitha Ni Nyoman Desi Kusuma Dewi Ni Nyoman Pujianiki Ni Wayan Loviasari Nur Asni Puspita Sari Pande Chrisna Aryasuta Puspitha, Ni Luh Putu Ria Putra, I Nyoman Giri Putu Adi Prawira Riris Christiani Gultom Rizky Ramadhan Siahaan, Jonathan M Timothy Kenoly Trisilia Mulyawati Anggraeni Wattimena, Adolf Krisna Mahendra Widiastuti Karim Widiastuti Widiastuti Yulianto Suteja