Marine Research in Indonesia (MRI - E-Journal)
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ASSESSMENT OF Fe, Cu, Zn, Pb, Cd & Hg IN AMBON BAY SURFACE SEDIMENTS
No full textIn this study, the concentration of Fe, Cu, Zn, Pb, Cd and Hg were determined in marine surface sediment to assess the impact of pollution sources around the Ambon Bay by application of Atomic Absorption Spectrometry (AAS). The metals concentrations found were in the following ranges (in mg kg-1 DW): 27,598 to 51,716 for Fe, 13.7 to 44.8 for Cu, 51.3 to 163 for Zn, 0.1 to 0.66 for Cd, 0.04 to 0.44 for Hg and 14.4 to 24.5 for Pb. The results indicated the strong contribution of heavy metals pollution from the urban waste, residential sources, farming industry, shipping activities and ship repair activity from dockyard around the Ambon Bay. This study provides the most updated information regarding heavy metals (Fe, Cu, Zn, Pb, Cd and Hg) concentrations in Ambon Bay marine sediment
REMOTE ESTIMATION OF TOTAL SUSPENDED SOLID (TSS) TRANSPORT AFFECTED BY TIDAL BORE “BONO” OF KAMPAR BIG RIVER ESTUARY USING LANDSAT 8 OLI IMAGERY
No full textThe Kampar River estuary has a unique tidal bore, namely Bono. A tidal bore is a natural phenomenon caused by the tidal flow which meet the flow of the river. Tidal bore "Bono" has an impact on the transport of suspended particles which is pretty much along the Kampar River. The purpose of this study is to determine the estimated concentration of total suspended solid in the river as the result of the transport by Bono in Kampar River estuary by Landsat 8 OLI. The primary data are Landsat 8 OLI sensor – on Path 126 and Row 60, recording date was on 23 -04-2016, which was analyzed spatially – and TSS in situ. The secondary data are tide forecasting data and topographical map of Indonesia. Distribution of total suspended solid indicates sediment transport and its distribution by TSS values ranged between 10-150 mg.L-1 and TSS in situ value ranged between 42-241 mg.L-1. Tidal range ranged from 0.78 to 4.2 m and current velocity ranged from 0-0.9 m.s-1, which generate tidal bore extending from the mouth to the river body, resulting in suspended particle transport along the river. TSS concentration is higher in the river estuary
ON THE NEW RECORD OF Lithoselatium kusu Schubart, Liu and Ng, 2009 FROM INDONESIA (CRUSTACEA: BRACHYURA: SESARMIDAE)
No full textLithoselatium kusu Schubart, Liu and Ng, 2009 previously known from Singapore and surrounding areas, in this paper reported for the first time from Indonesia. The specimens for this study were collected from under rocks and coral rubble around mangrove areas in Lingga, Indonesia. The morphological characteristics and differences of the three known species of this genus are presented
ORGANIC MATTER AND NUTRIENT PROFILE OF THE TWO-CURRENT-REGULATED-ZONE IN THE SOUTHWESTERN SUMATRAN WATERS (SSW)
No full textThe Indian Ocean is influenced by monsoon systems which alter the ocean’s physical and chemical properties. Specifically, the southwestern Sumatran waters in the eastern Indian Ocean are considered a dual current regulated zone i.e. affected by South Equatorial Counter Current (SECC) and South Java Current (SJC). This area is considered as having an important role in the transfer of organic matter or the biological pump. However, the information about this area is minimal, especially in terms of organic matter and nutrient profile. This study will update the recent information about the area, including the profile of particulate organic matter (POM), macro-nutrients, total suspended solids (TSS), macromolecule-degradingbacteria, and soft bottom macrobenthic organisms sampled from 26 stations in both the SECC-regulated zone and the SJC-regulated zone. The physical profile is typical of tropical watersand both zones have a distinct profile of organic matter and nutrients. The particulate organic carbon (POC), particulate organic nitrogen (PON), and TSS of the SECC-regulated zone can be considered higher than those of the SJC-regulated zone. This region is categorized as mesotrophic waters, especially from the surface up to 100 m. The production of nutrients and organic matter in the water column in this area contribute significantly to the abundance of heterotrophic bacteria and benthic organisms
CONTRIBUTION OF FISH CONSUMPTION TO CADMIUM AND LEAD INTAKES IN COASTAL COMMUNITIES OF WEST KALIMANTAN, INDONESIA
No full textConsumption of both marine and freshwater fishes is considered as a healthy way to obtain diet, but the ingestion of contaminated fishes remains a concern. Our study is conducted to asses cadmium (Cd) and lead (Pb) contents in various fishes consumed by coastal communities in six districts of West Kalimantan (Indonesia) and their health risks to the communities. Specifically, the objectives of this study are to determine the average weekly intakes (AWIs) of cadmium and lead based on dietary intake of fishes, then estimate health risk associated with fish consumption using the risk quotients (RQs) method. We also use food frequency questionnaires (FFQ) filled by 696 respondents to assess fish consumption habit of the communities in West Kalimantan who consumed up to 30 fish species in 2012 and 2013. Our results show that their average weekly fish consumption is 135.7 ± 66.3 g/week, which contributes to AWI values of 0.38 ± 0.55 ?g/kg body weight (bw) per week for Cd and 0.87 ± 0.65 ?g/kg bw per week for Pb. The RQ values indicate a low risk of Pb coming from fish consumption, but the RQ value for Cd is high for the children age group. In conclusion, fish consumption in the six districts of coastal communities in West Kalimantan generally does not pose any health risk from Pb. Conversely, Cd intake from fish consumption has a potential risk for children. As such, regular monitoring and additional studies are needed on potential contribution of Cd intake from other food sources
SURVIVAL RATE AND GROWTH OF JUVENILE SANDFISH (Holothuria scabra) IN VARIOUS REARING CONDITIONS
No full textTechniques for producing Holothuria scabra or sandfish sea cucumbers from aquaculture have been developed rapidly in the recent years to address the issues of decreasing sandfish population and increasing market demand. During the process of culturing H. scabra, the early stages of sandfish (i.e. larvae and juveniles) are the most critical of the development. Therefore, the Research and Development Division of the Marine Bio Industry – LIPI conducted a study to assess the growth performance of juvenile H. scabra ultured in four different rearing conditions: (i) indoor concrete tank, (ii) indoor fiberglass tank, (iii) outdoor concrete tank with 1 mm hapa mesh, and (iv) outdoor concrete tank with 3 mm hapa mesh. Each of the rearing condition was set with an initial juvenile density of 15 juveniles per tank with a mean initial weight of 14 g, and fed ad libitum with a mixed feed consisting of Enhalus acoroides sea grass, Pennisetum purpureum napier and cow manure. The experiments were conducted for 20 weeks between April 26 - September 23, 2013. After the experimental period, juveniles reared in the outdoor concrete tank with 1 mm mesh show the best performance with respect to their survival rate (48.89 ± 3.85 %),mean final weight (22.07 ± 1.01 g), final biomass (162.05 ± 18.17 g) and specific growth rate (0.15 ± 0.03% per day). Further studies that combine rearing conditions with different bottom substrates as well as investigating the effect of light are needed to optimize the production of H. scabra from aquaculture
POLICY MODELONMARINE TOURISM DEVELOPMENT IN WAKATOBI REGENCY (SE SULAWESI,INDONESIA)
No full textWakatobi Regency has a huge capacity in natural resources with it's beautiful and pristine coastal ecosystems that host 25 coral reefs species in diverse forms. The regency is considered as the world’s best biosphere and frequently visited by local and international tourists for diving/snorkeling. The objectives of this study are to determine the role of marine tourism in Wakatobi’seconomy and formulate an appropriate and strategic policy for its marine tourism development plan. Methods used in this research are theLocation Quotient (LQ) analysis to determine the relative ability of a sub-area to a wider area in the specific sector, and theProspective Participatory Analysis for preparing the marine tourism development plan. The LQ analysis for the marine tourism (trade, hotels, and restaurants) sector based on GDP data from 2004-2007 shows values ranging from 0.808-0.881, which indicate poor potential and low contribution of this sector toWakatobi’s economy. TheProspective Participatory Analysis involving 18 variables related to marine tourism development indicates that Wakatobi Regency has four key variables. These are:community behavior towards environmental protection, community character, human resources andmotivation. These variables would play an important role in preparing and implementing marine tourism development plan in Wakatobi Regency
THE OCCURENCE & DISTRIBUTION OF TWO BLACK SEA CUCUMBER SPECIES IN POMBO ISLAND, CENTRAL MALUKU (INDONESIA)
No full textThe so called “black sea cucumber” are found in Indonesia as several species including Holothuria atra, H. leucospilota, H. coluber, H. excellens and H. turriscelsa. The local community of Wainure village near Pombo Island in central Maluku had reported that most sea cucumbers inhabiting the island are the black sea cucumbers or locally known as “teripang hitam.” They are occasionally consumed but not exploited excessively by the locals. The goals of this study are to identify the species of black sea cucumbers inhabiting Pombo Island and map their distribution to understand the microhabitats of black sea cucumber. Two field surveys conducted in March and April 2014 collected more than 550 individuals of black sea cucumbers that belong to two species Holothuria (Halodeima) atra Jaeger, 1833, and Holothuria (Mertensiothuria) leucospilota Brandt, 1835. Furthermore, distribution maps of these two species show that they are found only along the SE to SW coast of the island. Such distribution may relate to the availability of marine vegetation, as well as boulders and stones that provide shelters to the organism. The distribution maps also show that H. atra has a wider distribution than H. leucospilota in Pombo Island. This may be due to the semi-cryptic habit of H. Leucospilota’s (i.e. hiding its posterior body under rocks or crevices), making its distribution restricted to areas that provide ample shelters
NEW RECORD OF PARASESARMA RAOULI RAHAYU AND NG, 2009 (CRUSTASEA: BRACHYURA: SESARMIDAE) FROM THE RIAU ARCHIPELAGO, INDONESIA
No full text A specimen of Parasesarma raouli (Crustacea: Brachyura: Sesarmidae) was collected from the mangrove area of Pulau Berang, Lingga, Riau Archipelago, Indonesia in Oktober 2014. This species previously was known only from Johor strait, Peninsular Malaysia. Its color in life is recorded for the first time.
CURRENT STATUS AND PROBLEMS OF THE CATCH STATISTICS ON ANGUILLID EEL FISHERY IN INDONESIA
No full textTo compensate the decline of the populations of temperate anguillid eels, tropical anguillid eels become getting attention of East Asian eel market in recent years. Many eel farms have been established in Java Island to culture tropical anguillid eels intending to export the products to East Asia. Since eel farming is reliant on wild-caught anguillid eels such as glass eels, elvers and yellow eels, these eel seeds have been captured in various places in Indonesia. However, it is still unknown that how much of tropical anguillid eels are caught as seeds for eel farming. This study showed two different patterns of the commodity chains of eel seeds from both Sukabumi Regency and Bengkulu Province to the eel farms in Java Island. Official catch statistics on anguillid eels found in both Sukabumi Regency and Bengkulu Province were also analyzed on their features and problems underlied. Considering the sustainable use of anguillid eel resources and critical stances on exploitation of eel seeds from all over the world, the Indonesian government should take an immediate action for developing the national catch statistics on anguillid eel fishery as soon as possible.