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Laju Pertumbuhan Kerang Abalon Haliotis squamata Melalui Budidaya IMTA (Integrated Multi Trophic Aquaculture) di Pantai Geger, Nusa Dua, Kabupaten Badung, Provinsi Bali Heny Hayati; I Gusti Ngurah Putra Dirgayusa; Ni Luh Putu Ria Puspitha
Journal of Marine and Aquatic Sciences Vol 4 No 2 (2018)
Publisher : Fakultas Kelautan dan Perikanan Universitas Udayana

Abalone is an important non fishery commodity that has high potential value to be developed. Abalone culture still faces some problems, such as, relatively slow growth rate, low survival rate and causing environmental pollution. One of the efforts to tackle the problems, is applying the culture system that is environmental friendly, such as IMTA (Integrated Multitrophic Aquaculture). This research aims to identify the growth rate and survival rate of the abalone (Haliotis squamata) and the suitability of chemical and physical environment parameter supporting the integration culture of abalone and seaweed (Gracilaria sp) on different stocking density at Geger beach, Nusa Dua, Bali. This research was performed in 45 days using a complete randomized design method that consist of three treatments and three repetition. The result showed that the highet growth rate was on treat ment T3 which consisted of abalone (Haliotis squamata) 40 individu and 10 bunches of seaweed (Gracilaria sp) 100 grams weight/each individu (0.76%/day), then It followed by T2 treatment that was integrated with 10 bunches of seaweed 50 grams (0.71%/day). The lowest growth rate observed on treatment T1 (control/monoculture) which consisted of 40 individu abalone (Haliotis squamata) (0.59%/day). The highest survival rate found on treatment T2 (97.5%) and followed by treatment T1 as control (94.5%), while the lowest number was found on treatment T3 (83.3%). Physical chemical water quality parameters showed that It supported the growth of both, abalone (Haliotis squamata) and seaweed (Gracilaria sp.) at Geger Beach, Nusa Dua, Badung Regency, Bali Province.

Pemantauan Kondisi Ikan Karang Menggunakan Metode Reef Check Di Perairan Selat Sempu Malang Selatan Oktiyas Muzaky Luthfi; Riza Alifia; Sherla Rizqia Putri; Firmina Bethrix Dasi; Bramastrha Artha Putra; Davitra Eka Permana; Elda Pebrizayanti; Muhammad Zuhal Fikri; Johan Saputro; Christopher Ari Setiawan; Krista Sibuea; Abdul Razak
Journal of Marine and Aquatic Sciences Vol 3 No 2 (2017)
Publisher : Fakultas Kelautan dan Perikanan Universitas Udayana

Reef Check is an activity to find out the condition of coral reefs and its surrounding ecosystems be then described and categorized its healthiness. The island of Java is one of the Islands in Indonesia that has lots of beaches, especially for East Java, here they have several areas that has become our research site in Sempu Strait, Sendang Biru, South Malang they are called Teluk Semut, Watu Meja, and Waru-waru. Underwater Visual Census (UVC) was used as a method for this research to identify reef fish in a transect of 100 x 5 x 5m scale in (Length, Width, and Height). Results shows several fishes was used to identify yet the family of Chaetodontidae with mean abundance 8 in Teluk Semut 1 station, 2.25 in Teluk Semut 2 station, 12.5 in Rumah Ikan station, & 13.5 in Watu Meja station. Watu Meja and Fish Apartment station shows higher mean abundance than other station, this indicates coral reefs ecosystem in this station have a better health & condition compare to the other stations. Results for family family Haemulidae, Snapper and Grouper shows low mean abundance, that indicates overfishing on Sempu Strait, South Malang. In other cases, the purposes of Reef Check is to determine the extents of human activities and its impact against the distribution and the healthiness of coral reefs in the area. For further extent, there has been still indications toward its management system yet fisheries potential in certain areas for this research.

Identifikasi Bakteri pada Rumput Laut Euchema spinosum yang terserang penyakit Ice-ice di Perairan Pantai Kutuh Suprabadevi Ayumayasari Saraswati; I Made Sena Darmasetiyawana
Journal of Marine and Aquatic Sciences Vol 2 No 1 (2016)
Publisher : Fakultas Kelautan dan Perikanan Universitas Udayana

The main causes of ice-ice disease that seaweed production will decline. Bacterial infections occur due to fluctuations in climate change resulted in a decrease in water quality resulting in the durability of seaweed. When seaweed stress will facilitate pathogen infection. Disease pathogens cause damage to internal organs. The spread of bacterial disease in seaweed is generally very fast and can lead to death, so that the loss caused by this disease is quite large. Ice-ice disease occurrence is seasonal and contagious, so the impact on the selling price low. The results showed that there are two types of pathogenic bacteria that can potentially cause disease in which bacteria Vibrio alginoliticus and Pseudomonas aeruginosa. Climate change affects the spatial distribution of micro seaweed bacterial pathogens.

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.

Komposisi Spesies Ikan Karang Di Perairan Desa Bunutan, Kecamatan Abang, Kabupaten Karangasem, Bali I Gusti Ngurah Agung Dhananjaya; I Gede Hendrawan; Elok Faiqoh
Journal of Marine and Aquatic Sciences Vol 3 No 1 (2017)
Publisher : Fakultas Kelautan dan Perikanan Universitas Udayana

Bunutan village is located in the Abang Subdistrict, Karangasem Regency, Bali. Marines of Bunutan has a coral reef coverage and reef fish under the water. This study aims to determine the species composition of reef fish in marine of Bunutan. The methods used to take reef fish data is Visual Census along 50 meters transect parallel a coastline at a depth of ±5 meters. Result of this study shows thats abudance of reef fish is about 1513 individual from 68 species and 18 family all around transect. The highest abudance derived from Pomacentridae Family with a total 1055 individual from 22 species founded. The composition of species in Bunutan marine site generally in a good condition with high diversity H’ = 3,188418, uniformity is fairly stable with value E = 0,753032 and with the value of dominance C = 0,069245 or nothing of coral reef fish which dominate each other. In terms of role fish in the sea, reef fish in Bunutan marine site have major fish about 92%, target fish 2% and indicator fish 6%. When relating to the condition of coral reefs in the marines of Bunutan, hard coral cover percentage is on 48.5% to 54.5% thats indicates the condition of coral reefs on moderate to good condition. The condition of coral reefs is utilized by reef fish as a place of refuge, feeding or breeding grounds, causing the species composition of reef fish in the marine of Bunutan on relatively good.

Perbandingan Kemampuan Satelit SAR, Optik dan Kombinasi SAR & Optik Untuk Mendeteksi Area Mangrove di Teluk Benoa I Wayan Matsya Deva Nagendra; I Wayan Gede Astawa Karang; Ni Luh Putu Ria Puspitha
Journal of Marine and Aquatic Sciences Vol 5 No 2 (2019)
Publisher : Fakultas Kelautan dan Perikanan Universitas Udayana

Mangrove in Benoa Bay plays important roles in the southern Bali island. Mangrove habitat in Benoa Bay has undergone in area changes due to various anthropogenic activities and natural factors, it is important to monitor the distribution of the mangrove forests. Mangrove area changes can be detected using remote sensing technology. This research is to aims the capabilities of radar and optical satellites in mangroves detection using supervised classification Maximum likelihood & Minimum distance. The results showed that radar images failed to detect mangroves as a separate class and produced three classes of land cover (urban, vegetation and waters), optical images and a combination of radar & optic images capable of detecting mangroves as a separate class and produce five land cover class (vegetation other, urban, mangroves, waters and agriculture). The evaluation of the Maximum likelihood classification shows that the combination of radar & optical images scenario has the highest overall accuracy and kappa accuracy with value of 91.35% and 87.01% respectively. Minimum distance classification shows that the optical image scenario has the highest accuracy and highest kappa accuracy with value of 80.83% and 72.51%. The results of the accuracy evaluation shown that the maximum likelihood has higher accuracy than the minimum distance classification method.

Hubungan Kelimpahan dan Keanekaragaman Fitoplankton dengan Kelimpahan dan Keanekaragaman Zooplankton di Perairan Pulau Serangan, Bali Luh Putu Puspita Dewanti; I Dewa Nyoman Nurweda Putra; Elok Faiqoh
Journal of Marine and Aquatic Sciences Vol 4 No 2 (2018)
Publisher : Fakultas Kelautan dan Perikanan Universitas Udayana

Plankton is one of the biological resources that have an important role in the marine ecosystem. Plankton life is strongly influenced by the water quality parameters, one of which is the content of nutrients (nitrates and phosphates). Increased nutrient content caused by the increased load input from human activities. Serangan Island waters including the coastal ecosystem is widely used for a variety of human activities, such as tourism, aquaculture, residential, and transportation. All human activity will affect water quality will lead to an increase in nutrients and organic matter which in turn can lead to changes in water quality chemical physics and structure of plankton. The purpose of this study was to determine the relationship of the abundance and diversity of phytoplankton abundance and diversity of zooplankton and to know the physical parameters - chemical effect on the abundance of plankton. The method used is the Pearson correlation analysis to determine the relationship between abundance and diversity of phytoplankton abundance and diversity of zooplankton, and principal component analysis to look at the parameters of the water the most influence on the abundance of plankton. Results of Principal Component Analysis showed that the waters of the parameters that influence the abundance of plankton varies at each observation station. Pearson correlation analysis showed a strong relationship between the abundance of phytoplankton to zooplankton abundance with a correlation value of 0.64.

Studi Kelimpahan Dan Keanekaragaman Kepiting Di Hutan Mangrove Dan Padang Lamun Di Pantai Mertasari I Gusti Ayu Dian Indraswari; I Gusti Ngurah Putra Dirgayusa; Elok Faiqoh
Journal of Marine and Aquatic Sciences Vol 4 No 1 (2018)
Publisher : Fakultas Kelautan dan Perikanan Universitas Udayana

The ecosystem of mangroves and seagrass in Mertasari Beach are located nearby and and inhabited with various species that coexist, One of the association’s creature in mangrove ecosystem and seagrass ecosystem is crab. There were a habitat selection of crabs, so it does possible to find the same species in the mangrove ecosystem and seagrass ecosystem. This research aims to know the type, abundance and diversity of crabs in the Mertasari Beach on two different ecosystems such as mangrove and seagrass ecosystem. The research were conducted in January until February 2017. In this research the Random sampling method was used to create a 1x1m2 square placed on 5 substations at each research station. Crab sampling was conducted at the lowest tide and has been done twice in a month. The results showed there were 7 families with 20 species. In both ecosystem were found 3 spesies such as Scylla serrata, Grapsus albolineatus and Myomenippe fornasinii. This happens because of several factors, like the tidal and the flow of the river into habitat removal by crabs. The highest abundance of crabs was found in mangrove stations of 411 individuals/m2, while at the seagrass station were 93 individuals/m2 due to food availability and environmental conditions. The highest value diversity index (H) at mangrove station was 1.94 and seagrass station of 1.73 with moderate category indicated in those area had sufficient productivity, conditions of the ecosystem is pretty balanced and moderate ecological pressure.

Daya Dukung Ekosistem Mangrove Terhadap Hasil Tangkap Nelayan di Taman Hutan Raya Ngurah Rai, Bali Jero Ketut Tri Ayu Lestari; I Wayan Gede Astawa Karang; Ni Luh Putu Ria Puspitha
Journal of Marine and Aquatic Sciences Vol 4 No 1 (2018)
Publisher : Fakultas Kelautan dan Perikanan Universitas Udayana

Mangrove ecosystem is a complex ecosystem. The sustainability of fish resources is highly dependent on the sustainability of the mangrove ecosystem. The purpose of this research is to know the mangrove density, fish catching from fisherman in mangrove area and relationship of mangrove vegetation and the quality of the waters with the fish catching in the mangrove. Data collections include mangrove condition, fish catching, and water environment parameter. Research conducted in the mangrove area Mina Werdhi Batulumbang (TP I) and Simbar Segara (TP II). The results of this study found 5 species of mangrove. The density values of species at research site I ranged between 0.02 ind / m2 - 0.08 ind / m2. While the density value of species in this research site II ranged between 0.01 ind / m2 - 0.07 ind / m2. Rhizophora mucronata type has the highest density. Fish catching is the largest average in research place I, that is 1.42 kg /day /fisherman with mangrove area 2,397 Ha and the research of site II shows that the fish production of fisherman catches of 0,8 kg / day / fisherman with mangrove area 1,986 Ha. There is a positive relationship between the density and area of mangrove with the number of fish catching, where the fish catching will increase when the mangrove area also increases and there is a strong relationship between the catch and dissolved oxygen.

Karakteristik Ikan Tuna sirip biru selatan (Thunnus maccoyii) Hasil Tangkapan Kapal Rawai Tuna yang didaratkan di Pelabuhan Benoa I Gede Adi Swastana; Abd. Rahman As-syakur; Dian Novianto
Journal of Marine and Aquatic Sciences Vol 2 No 2 (2016)
Publisher : Fakultas Kelautan dan Perikanan Universitas Udayana

Southern bluefin tuna (SBT) is scientifically known Thunnus maccoyii, and just live in the southern hemisphere. SBT fish classified as the most exploited tuna fish in the southeastern part of the Indian Ocean, so it is protected by the International Union for the Conservation of Nature (IUCN). The aim of this study is too collected of SBT fish caught during January which is the peak of SBT landing in Benoa port. The study was conducted base on data sampling, observation and interviews on 33 ships were landing SBT fish during January 2016. Based on observations from 33 vessels, we found that the total of SBT fish that landed in Benoa port during January 2016 is 251 fresh fish and 366 frozen fish. However just 251 SBT fresh fish were sampled, and the result indicated the fresh SBT fish is dominated by weigh between 61-70 kg with number 61 fish with a total weight of 19.28 tonne. The SBT were caught dominated by fish that has FL (fork lenght) ranging between 151-160 cm with number 69 fish. While the smallest SBT range between 131-140 cm with the number of 5 fish. These results indicate that SBT fish caught in the Souetheast Indian Ocean during January 2016 is generaly relative small fish (130–160 cm FL) with a number of 163 fish and mature SBT fish (FL > 162 cm) with a number of 88 and young SBT (FL < 130 cm) with a number of 5 fish. Based on morphometric analysis, eyeball diameter of SBT range 6-8 cm, the length lateral head from the tip of the mouth to behind the gill cover ranging 46-54 cm, the length of body from the early dorsal or in front of the first dorsal fin ranging between 38-47 cm, the height of fish at the end of the anal or at the end ranging between 34-39 cm, the high of caudal peduncle ranging between 4-5 cm, th length of the dorsal base of the tail fish ranging between 53-63 cm, and the length of the base of tail anal from anal to tail ranging between 41-51 cm. Base on size and age composition, it is shown that the growth of SBT during January 2016 is isometric.

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Location Kota denpasar, Bali INDONESIA

Abstract

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Contact Name
-

Contact Email
-

Phone
-

Journal Mail Official
-

Editorial Address
-

Location
Kota denpasar,

Bali

INDONESIA