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Journal of Marine and Aquatic Sciences

jmas
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Published by Universitas Udayana

ISSN : 23028114 EISSN : 25497103 DOI : -

Core Subject : Science,

Earth & Planetary Sciences

Journal of Marine and Aquatic Sciences (JMAS) adalah peer-reviewed, open access journal, diterbitkan oleh fakultas Kelautan dan Perikanan, Universitas Udayana. JMAS menerbitkan hasil peneitian original dan review artikel dalam bidang ilmu kelautan, manajemen sumberdaya perairan, dan aplikasi remote sensing di bidang kelautan dan perikanan.

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Articles 18 Documents

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Search results for , issue "Vol 5 No 1 (2019)" : 18 Documents clear

Prediksi Laju Sedimentasi di Perairan Teluk Benoa Menggunakan Pemodelan Numerik I Putu Ranu Fajar Maharta; I Gede Hendrawan; Yulianto Suteja
Journal of Marine and Aquatic Sciences Vol 5 No 1 (2019)
Publisher : Fakultas Kelautan dan Perikanan Universitas Udayana

Benoa Bay is one of the unique ecosystems on the island of Bali because it is a shallow estuary area and has an ecosystem that is important for the waters of the mangrove ecosystem and seagrass. In recent years, Benoa Bay has been reported to have undergone siltation due to sedimentation. However, there has not been much scientific study of the sedimentation rate occurring in Benoa Bay. The study of sedimentation will provide an overview of the rate of sedimetation in the study area. Numerical modeling is one of the most commonly used methods to describe hydrodynamic processes in waters, which are the main drivers of the process of movement of pollutants in waters such as waste, sediment, and others. Thus, the study of sedimentation rate, either spatially or temporally, needs to be done in the waters of Benoa Bay using numerical modeling. The results of this study show that sedimentation rates in Benoa Bay have a minimum value of 1.08x10-6 and a maximum of 24.88 kg/m2/day with an average of 0.57 kg/m2/day. High sedimentation rates occur in the western part of the bay, on the river route, and in the northern part of the bay, between Serangan Island and Mertasari beach. Areas that potentially experience silting in Benoa Bay include the southern port of Benoa Harbor which reaches 0.23 m/year, the waters north of Serangan Island reaching 0.008 m/year, and the area close to the estuary which reaches 0.35 m/year.

Potensi Budidaya Rumput Laut dalam Kaitannya dengan Dampak Perkembangan Pariwisata di Perairan Pantai Kutuh, Badung, Bali Ayu Putu Wiweka Krisna Dewi; Rani Ekawaty
Journal of Marine and Aquatic Sciences Vol 5 No 1 (2019)
Publisher : Fakultas Kelautan dan Perikanan Universitas Udayana

Seaweed culture is one of the main marine and fishery commodities which mostly still occupied by coastal community in Badung regency. One of the center areas for seaweed culture development is at Kutuh Beach in Kutuh Village South Kuta District, Badung regency . Kutuh Beach also known as Pandawa Beach that have developed become a tourism area. The development of Kutuh beach as tourism area affect the development of existing seaweed culture activities. Therefore, a study have been done to get scientific information related to the development of seaweed culture in Kutuh coastal water. This research was conducted at in September-October 2016. The data was collected by carrying out measurements directly on the location of seaweed culture of Eucheuma cottonii at Kutuh coastal water. The data collected in this study including the growth of seaweed Eucheuma cottonii and the quality of Kutuh coastal waters, such us nitrat, phosphate, temperature, salinity, pH, and dissolved oxygen (DO). Our study showed that that the quality of Kutuh Pantai waters is still in good condition for the growth of seaweed except Phosphor that can inhibit the growth of seaweed. Instead of phosphor, seaweed can not grow well in the waters of Kutuh Beach because it is eaten by predators and low intensity of sunlight.

Pengamatan Laju Penyakit White Syndrome Pada Montipora sp. Di Pulau Pramuka, Taman Nasional Laut Kepulauan Seribu, DKI Jakarta Abdur Rosyid; Oktiyas Muzaky Luthfi
Journal of Marine and Aquatic Sciences Vol 5 No 1 (2019)
Publisher : Fakultas Kelautan dan Perikanan Universitas Udayana

Coral disease now became main factor of coral degradation in the world. There is still a few report about coral disease in Kepulauan Seribu Marine National Park (TNKPS) include of white syndrome (WS) in Montipora sp. WS was characterized by white area on coral surface at several stages. WS had caused coral tissue loss and leaved bare CaCO3 skeleton that was caused by pathogenic Vibrio coralliitycus associated with other microorganisms. In this study the progress of WS calculated by measurement of the distances of WS that moved from diseased to healty coral surface. All calculations was performed used ImageJ Software. Our result showed that WS progression rate in first week was 9.06 cm2 and the second week was 2.37 cm2. Total coral tissue mortality was 12.03% for 2 weeks.

Phylogenetic Study of Zebrafish (Amatitlania nigrofasciata) as an Introduction Spesies in Buyan Lake Bachori Dhian Pratama; Pande Gde Sasmita Julyantoro; Made Ayu Pratiwi
Journal of Marine and Aquatic Sciences Vol 5 No 1 (2019)
Publisher : Fakultas Kelautan dan Perikanan Universitas Udayana

Buyan Lake has some fishery commodities which were often encountered include the Zebrafish (Amatitlania nigrofasciata). The origin existence of Zebrafish in Buyan Lake is not yet known then it needs study in order to know the certainty of species, phylogenetic, haplotype diversity, and phenotype characteristic. The study was conducted from January to February 2018. Molecular identification was done at Laboratory of Biodiversity Indonesia Bali. This research used quantitative and qualitative descriptive methods. Sampling was done by simple random sampling from fisherman catches. Zebrafish’s fin samples were used for molecular identification and Zebrafish’s morphological for morphological identification. The results showed that the entire sequence samples were successfully amplified with the Cytochrome Oxidase subunit I (COI) gene of 620 bp. The genetic distance in the entire Zebrafish sequences in Buyan Lake of 0 which means that the sequence of all samples are exactly similiar as species of Amatitlania nigrofasciata with the genetic distance calculation of 0. Sequence of Zebrafish in Buyan Lake is closely related to Amatitlania nigrofasciata KU568740, Amatitlania nigrofasciata KU568739, Amatitlania nigrofasciata KU568737, Amatitlania nigrofasciata KJ552531, and Amatitlania nigrofasciata KU568738 with genetic distance of 0 and has a distant relation with Rocio ostofasciata EU751752 with genetic distance of 0.113. The haplotype diversity of Zebrafish sequences in Buyan Lake showed the value of 0 which belongs to a low haplotype diversity. Black and Black Zebrafish with Red Spotted are in a different clade with Albino and Albino Zebrafish with Red Spotted with bootstrap value of 100, means they have phenotypically differences.

Studi Variabilitas Produktivitas Primer Bersih Serta Hubungannya dengan El-Nino Southern Oscillasion (ENSO) dan Indian Ocean Dipole (IOD) di Laut Banda Berdasarkan Data Satelit Aqua MODIS Ni Luh Novita Aryanti; I Gede Hendrawan; Yulianto Suteja
Journal of Marine and Aquatic Sciences Vol 5 No 1 (2019)
Publisher : Fakultas Kelautan dan Perikanan Universitas Udayana

Banda Sea is one of the waters had rich of fish catch. The high catch of fish was related with primary productivity of these waters. Net Primary productivity in the Banda Sea was related with some oceanographic factors such as current, ARLINDO, upwelling and downwelling. The oceanographic factors are influenced by ENSO and IOD. The aim of this research to explained the variability of net primary productivity in Banda Sea and its relation with oceanography factor such as ENSO and monsoon. Data that used in this research were data from MODIS satellite and for analysis of net primary productivity data used Vertically Generalized Production Model (VGPM). The relation of net primary productivity with ENSO and IOD can used pearson correlation method. The result of net primary productivity value in Banda Sea was about 100 gCm-2day-1 - 1200 gCm-2day-1, with the highest apex net primary productivity in August precisely in the east season. The high value of net primary productivity due to upwelling in the season. The value of net primary productivity in west season was decreased. This condition caused by the downwelling of the season. The region with the highest net primary productivity value was the northeast of Banda Sea and the region with lowest net primary productivity value was the western of Banda Sea. The relationship between ENSO with net primary productivity in Banda Sea classified in medium correlation with value 0,556, while relationship between IOD and net primary productivity classified in weak correlation with value 0,23.

Asosiasi Echinodermata pada Ekosistem Padang Lamun di Pantai Samuh, Nusa Dua, Bali Wahyu Ilvita Vindia; Pande Gde Sasmita Julyantoro; Endang Wulandari
Journal of Marine and Aquatic Sciences Vol 5 No 1 (2019)
Publisher : Fakultas Kelautan dan Perikanan Universitas Udayana

Seagrass beds and their associate biota are very important in maintaining the balance of coastal ecosystems. Samuh Beach is one of seagrass ecosystem area in Bali Island. One of the biota that exists in the seagrass ecosystem in Samuh Beach is Echinodermata. Since the limited information and the complex activities at Samuh Beach make research about associations of Echinodermata with seagrass, this research seems become important to be conducted. This study was aimed to determine the density of species, species composition, and distribution patterns of lamun and Echinodermata in the coastal waters of Samuh beach. Data analysis was performed by using density type, species composition, dispersion index of morisita and association. The average seagrass density of each station in Samuh coastal waters ranged from 156-246 stands/m2 and the highest density of Echinoderms is Diadema setosum in each station. The species composition of seagrass in Samuh beach comprises five species of seagrass namely: Enhalus acoroides, Halophila ovalis, Thalassodendron ciliatum, Cymodocea serrulata and Syringodium isoetifolium. The composition of Echinodermata species that found amounted to 13 species of Echinodermata namely: Diadema setosum, Amphiura sp., Archaster typicus, Asterias sp., Mespilia globulus, Tripneustes gratilla, Pseudoboletia maculata, Protoreaster nodusus, Ophiactis resillens, Ophiopteris antipodum, Centrostephanus rodgersii, Echinothrix and Echinothrix mathei. Based on the calculation of morisita, seagrass and Echinodermata Index in Samuh Beach was spread uniformly and clumped. The result of association analysis showed that there were positive association, negative association and association with no relation between seagrass and Echinodermata in Samuh Beach.

Kondisi Kesehatan Karang Genus Porites di Perairan Jemeluk dan Penuktukan-Bali Ni Luh Putu Febbi Mellani; I Gede Hendrawan; Widiastuti Widiastuti
Journal of Marine and Aquatic Sciences Vol 5 No 1 (2019)
Publisher : Fakultas Kelautan dan Perikanan Universitas Udayana

This research was conducted to determine the coral health condition of genus Porites at Jemeluk beach and Penuktukan beach with the different of reef geomorphology. Coral reef data was collected for two days in Jemeluk beach (reef flats) in March 2017 and in Penuktukan beach (reef slope) in April 2017. Each observation location consisted of 3 stations parallel to the coastline. Observation of coral health data using belt transect method size 2 x 25 m with width of 1 meter each to left and right side. Photo documentation was performed on coral reefs of Porites and subsequently identified the types of diseases and forms of health problems using Coral Disease Handbook, Guidelines for Assessment, Monitoring and Management. The types of coral diseases found in both beaches are ulcerative white spot and white plague. The number of dominant colonies that infected with the disease was found on Jemeluk beach which has coastal morphology of coral reefs. The coral health conditions of the genus Porites found on Jemeluk and Penuktukan beaches are in an unhealthy condition. Compromised health is dominant in Jemeluk beach, this is estimated to be caused by the presence of river flow at observation sites which is relatively high. In addition, the coral reef morphology in Jemeluk beach is reef flat causing the reefs in this area to be more susceptible to damage.

Cover Depan JMAS Vol 5(1), 2019 Cover Depan JMAS Vol 5(1), 2019
Journal of Marine and Aquatic Sciences Vol 5 No 1 (2019)
Publisher : Fakultas Kelautan dan Perikanan Universitas Udayana

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