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Marine Research in Indonesia

MRI
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Published by Lembaga Ilmu Pengetahuan Indonesia

ISSN : 02162873 EISSN : 24432008 DOI : -

Core Subject : Science,

Earth & Planetary Sciences

MARINE RESEARCH IN INDONESIA (MRI) has been published since 1956 by Indonesia's oldest marine research institute, the Research Center for Oceanography of LIPI (Indonesian Institute of Sciences). MRI focuses on physical, chemical, biological, geological oceanographic as well as coastal management studies in the Indonesian seas and the adjacent Indo-Pacific region.

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Articles 567 Documents

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STUDIES ON THE DISTRIBUTION OF BARNACLE LARVAE AND THE BARNACLE FOULING IN THE ESTUARINE AREA OF MUARA KARANG Romimohtarto, Kasijan; Arinardi, Okto Haryanto
Marine Research in Indonesia Vol 20 (1977)
Publisher : Research Center for Oceanography - Indonesian Institute of Sciences (LIPI)

Estuary hosts many of the meroplanktonic lives of marine animals, among which are the barnacles. The study of the seasonal abundance of the barnacle larvae and of the barnacle attachments at Muara Karang during 1975-1976 indicated that barnacle larvae and barnacle attachments occurred throughout the year. However, certain peaks of the larvae abundance and the high densities of attachment were found in certain months of the year. The peaks of larvae distribution were observed in April 1975, June 1975, September 1975, and January 1976. In general the density of the attached barnacles on panels was highest during the period of March - August, and lowest during December-February. The physical, biological, and sedimentological factors in relation with the distribution of the barnacle larvae and the density of the attached barnacles were discussed. Two governing factors seemed to be the wave and the sediment load. Relationship between the abundance of the barnacle larvae and the density of attachment was difficult to see.

SOME WATER CHARACTERISTICS OF ESTUARIES IN INDONESIA Uktoseya, Henk L.
Marine Research in Indonesia Vol 20 (1977)
Publisher : Research Center for Oceanography - Indonesian Institute of Sciences (LIPI)

This paper describes the results obtained during several hydro-oceanographical observations of some estuaries in Indonesia to provide environmental informations. It is also an attempt to make a general interpretation of the collected data, to explain or find out the physical processes acting in these regions.

TEMPERATURE OBSERVATIONS IN THE WATER-OFF MUARA KARANG Kastoro, -; Birowo, Soejatno
Marine Research in Indonesia Vol 20 (1977)
Publisher : Research Center for Oceanography - Indonesian Institute of Sciences (LIPI)

During the period of March 1975 to February 1976 a survey was carried out in the water off Muara Karang, Jakarta Bay. Water temperature were slightly higher than those in the open sea, and showed a seasonal variation. The seasonal variation axe affected by meteorological conditions, incoming water from neighbouring seas, and by the land mass.

PELAGIC ENVIRONMENT IN THE WESTERN PART OF JAKARTA BAY Nontji, Anugerah; Supangat, Imam
Marine Research in Indonesia Vol 20 (1977)
Publisher : Research Center for Oceanography - Indonesian Institute of Sciences (LIPI)

Seven stations in the western part of Jakarta Bay were occupied monthly from June 1974 to June 1975. Monthly variations of several hydrological and biological properties of the pelagic environments are described. Rainfall over the hinterland of Jakarta plays important role in lowering the salinity in the bay. On the other hand the phosphate content is more closely associated with the rainfall over Jakarta. The main source of phosphate is likely to come from the result of urban activities in Jakarta. There is a fair corespondence in annual fluctuation between phosphate and phytoplankton chlorophyll. Annual mean of properties at each station shows that from the shore outward the values of phosphate, phytoplankton chlorophyll, and zooplankton volume decreased while of salinity and transparency increased. Interrelationships among several factors are discussed.

PRELIMINARY STUDY ON THE DISTRIBUTION OF THE AEROBIC HETEROTROPHIC BACTERIA AND THE MICROBIAL INDICATORS IN JAKARTA BAY Thayib, Soeminarti S.; Soehadi, Flor
Marine Research in Indonesia Vol 20 (1977)
Publisher : Research Center for Oceanography - Indonesian Institute of Sciences (LIPI)

The distribution of heterotrophic bacteria and microbial indicators in the Jakarta Bay were studied. Higher frequency of occurrences of the total coliform were observed in water samples collected near rivermouths or in the vicinity of islands. Lower frequency of occurrences of total coliform were obtained from samples collected from the far northern side of the Bay. The isolated strains belong to the genera Achromobacter, Vibrio, Flavobacteria, Micrococcus and coliforms. Micrococcus and coliforms were mostly obtained from samples collected at stations which are suspected to be highly influenced by human activities. The presence of Vibrio parahaemolyticus-like organisms were also determined. Occurrences of the genera varied unpredictably but were mostly within the six genera mentioned.

PRODUCTIVITY OF DIATOMS IN CULTURE AND IN MARINE HABITATS Werner, Dietrich; Roth, Richard
Marine Research in Indonesia Vol 20 (1977)
Publisher : Research Center for Oceanography - Indonesian Institute of Sciences (LIPI)

The diatom dominated phytoplankton net primary production in different areas of the ocean (from 100-1000 mg C. m-2. day-1) and in estuaries (up to 2000 mg C. m-2. day-1) is compared with the maximum productivity of marine diatoms in culture (50 g C . m-2 . day-1) for Cyclotella cryptica (Centrales, Diatomeae) and 1000 mg C . m-2. day-1 for Coscinodiscus asteromphalus (Centrales, Diatomeae). The rate of C-assimilation as a measure of primary production is critically discussed in relation to the different factors regulating the reproduction of cells and the production of organic material. The evaluation of another parameter for primary production: light dependent protein synthesis (LPS) is proposed, which brings reproduction of phytoplankton cells and the production of organic material closer together. As an example of the requirement for more information about the potential growth and production rate of diatom species, some results on the cultivation of the tropical shallow water diatom Bellerochea yucatanensis V. STOSCH (Centrales, Diatomeae) are presented. At 30 C this species has a specific growth rate (µ max) of = 4.4 divisions per day and 4 divisions per day at 34°C with an average cell size of 34 x 26 ? m. The temperature range of this species is from 12°C (µ = 0.3) to 35°C (µ = 2).

CURRENT STATUS OF THE CALIFORNIA OYSTER INDUSTRY Richards, Thomas L.; Taylor, Phillip R.
Marine Research in Indonesia Vol 20 (1977)
Publisher : Research Center for Oceanography - Indonesian Institute of Sciences (LIPI)

The oyster culture operation in Moro Bay is typical of the United States Pacific Coast Crassostrea gigas mariculture industry. Of this Bay's 1,000 hectares of marshes, tidelands and channels 400 hectares have been alloted by the State of California for private oyster cultivation. Approximately 180 hectares of this allotment are suitable for bottom and stake culture on a three-year growing cycle. Each year this 60 hectares is planted with cultch shell at the rate of 60 cases of cultch per hectare. Each case contains an average of 1,000 cultch shells with 10 oyster spat per shell. A typical survival rate of 30% yields, 3,000 liters of oyster meat per hectare after 36 months of growth.

ECOLOGY OF SOME MARINE LAGOONS ALONG THE EAST-COAST OF INDIA WITH SPECIAL REFERENCE TO THE MANAGEMENT AND UTILISATION OF THEIR RESOURCES Menon, A. G.K.; Raman, K.
Marine Research in Indonesia Vol 20 (1977)
Publisher : Research Center for Oceanography - Indonesian Institute of Sciences (LIPI)

The marine lagoons along the east coast of India such as the Chilka-lake in Orissa State, the Pulicat and the Ennore lakes near Madras, Silvatturai lagoon in Tuticorin, and the Mandapam lagoon in Ramanathapuram are shallow, vast sheets of saline water whose physical and chemical characteristics are quite different from the backwaters of the west coast and constitute distinct categories of biological environment. The main characteristic feature of these lagoons is that they are connected to the sea by a narrow mouth which is closed by a sand bar for varying periods of the year. One or more seasonal rivers open into some of these lagoons and flood them during the monsoon. The land run-off during monsoon is the only source of freshwater for others. The bar-mouth connection with the sea is opened by the thrust of the flood waters aided in some cases by human effort. This opening operates for a few months between November ? December and June - July or throughout during some years following heavy monsoon. The closure occurs by general silting and formation of a sand bar.

SOME NOTES OF THE HYDROGRAPHIC SURVEYS IN INDONESIAN WATERS Pardjaman, Djamhir
Marine Research in Indonesia Vol 20 (1977)
Publisher : Research Center for Oceanography - Indonesian Institute of Sciences (LIPI)

During the period of 1969 to 1975 "JANHIDROS" carried out several hydrographic surveys and marine investigations in the Sunda Shelf and its adjacent waters. Data obtained during these surveys has shown that the general characteristics of the area which are primarily governed by the monsoonal regime are also affected by local conditions. The purpose of this paper is to render data based on these surveys which may be useful to complement environmental information.

THE NUMERICAL MODELLING OF TIDES IN A SHALLOW SEMI-ENCLOSED BASIN BY A MODIFIED ELLIPTIC METHOD Sidjabat, Mulia M.
Marine Research in Indonesia Vol 21 (1978)
Publisher : Research Center for Oceanography - Indonesian Institute of Sciences (LIPI)

A numerical model which renders possible the numerical solution of the nonlinear tidal equations by obtaining a solution for each individual tidal component is developed. For this purpose, a set of time independent non-linear equations for each tidal constituent is constructed. Each of these sets of equations is interrelated through the non-linear frictional terms, the approximation of which is accomplished by an iterative scheme. The method is tested for several models before it is applied to the real basin (Bight of Abaco). In order to evaluate the model and to construct the boundary conditions along the opening, a series of tidal observations were undertaken. The viability of the method is indicated by the fact that the results of computations using a coefficient of friction r = 0.0034 give good agreement with observations for all components and over all stations.

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Aan J. Wahyudi

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aanj001@lipi.go.id

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mri@mail.lipi.go.id

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Location
Kota adm. jakarta selatan,

Dki jakarta

INDONESIA