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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 34 Documents

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Search results for , issue "Vol 17 (1977)" : 34 Documents clear

OBSERVATION ON BEACH EROSION AND CORAL DESTRUCTION BY REMOTE SENSING TECHNIQUES Praseno, Djoko P.; Sukarno, -
Marine Research in Indonesia Vol 17 (1977)
Publisher : Research Center for Oceanography - Indonesian Institute of Sciences (LIPI)

Remote sensing techniques were used to observe beach erosion at Sengkidu Beach, Labuan Amuk, east coast of Bali. Erosion was caused by wave actions flowing over destructed coral reef. Aerial photography was found useful in obtaining first hand information of the destructed corals and its affects on the beach.

SPECULATION CONCERNING SPECIATION IN CORAL REEF FISHES Nursall, J. R.
Marine Research in Indonesia Vol 17 (1977)
Publisher : Research Center for Oceanography - Indonesian Institute of Sciences (LIPI)

The relatively constant equatorial marine environment provides a milieu within which biotic factors provide the chief selective forces acting on fish species. Increasing diversity increases evolutionary opportunity by heterotrophic magnification. Niche availability is almost limitless, space (volume) is the ultimate constraint. Abiotic thresholds, e.g., seasonal isotherms, are filter barriers to emigration to higher latitudes. Beyond such thresholds, abiotic, factors become the chief selective forces acting on fish species.

CORAL RESEARCH IN THE INDONESIAN ARCHIPELAGO, THE PAST, THE PRESENT, AND THE FUTURE Wijsman-Best, Maya
Marine Research in Indonesia Vol 17 (1977)
Publisher : Research Center for Oceanography - Indonesian Institute of Sciences (LIPI)

In the past, several big expeditions crossed the Indonesian waters. Coral reefs and their amazing structures and inhabitants were always amongst their special interest. Geomorphological reef theories concerning the Sunda shelf in the Pleistocene period and the barrier reefs in the archipelago have been formulated during the first forty years of the present century. Two major areas of research are discussed i.e. the Bay of Jakarta with emphasis on structure and history of one of two coral islands, Nyamuk and Sakit, and the Togian area in Celebes. The rich tertiary coral reefs, east of the Pleistocene Sunda shelf around Celebes, are treated at the hand of the studies of the geologist, J.H.F. UMBGROVE. This author came across several coral reef problems which are still of present day interest e.g. the diversity and variability of the coral species as a result of the complex ecosystem. Two examples are mentioned to give a general idea of the questions arising in different coral species. Nowadays these problems are normally approached from the geological, physiological, ecological or taxonomic point of view. Even so, in the future many field descriptions will have to be carried out along with zoogeographical work in the main centres of taxonomy, before the species of major influence on the structure of the coral reefs can even merelybe listed.

CORAL REEF RECOVERY FOLLOWING ACANTHASTER INFESTATIONS Pearson, R. G.
Marine Research in Indonesia Vol 17 (1977)
Publisher : Research Center for Oceanography - Indonesian Institute of Sciences (LIPI)

Since late 1971, data have been obtained on coral recolonization on reefs of the Great Barrier Reef which had been damaged by Acanthaster infestations during the 1960s. There is now tabular Acropora, particularly on the seaweed reef slope in the depts of less than 10 meters. Many such corals now measure 50 cm to 100 cm in diameter. However, recent observations indicate that these corals can be dislodged by strong wave action thus providing an opportunity for both further coral settlement and for the survival and growth of previously "overtopped" colonies.

DISTRIBUTION OF CORAL COMMUNITIES ON REEF SLOPES IN THE MASCARENE ARCHIPELAGO, INDIAN OCEAN Faure, Gerald
Marine Research in Indonesia Vol 17 (1977)
Publisher : Research Center for Oceanography - Indonesian Institute of Sciences (LIPI)

Three zones and sic "horizons" are defined and described on the basis of topographic elements, growth forms of corals, generic and specific diversity of scleractinians and associated fauna and flora - : Spurs and grooves zone of coral-built morphogenesis ("horizon superieur" 0-5m, "horizon intermediaire" 5-15m, "horizon inferieur" 15-20m); Spurs and grooves of volcanic morphogenesis 20-25m; Volcanic flagstone ("horizon superieur" 25-30m, "horizon moyen" with sponges and corals, 30-35m, "horizon inferieur" with gorgonians and antipatharia 35-50m). A total of 98 species belonging to 58 genera were collected on reef slopes. It was found that there is a successive increase in generic and specific diversity from the upper part (36 species), to 20 meters (63 species), related to the decrease of exposure to wave action. The decrease in the number of species from 25 (54 species) to 50 meters (?18 species), proves that light becomes a limiting factor below 25-30m. Nevertheless, sedimentation effects, biological competition (algae, sponges, alcyonariansâ¦.) and other factors are very significant in determining community structure of corals. A comparative study (quantitative and qualitative distribution, zonation) with other localities is suggested as conclusion.

THE FISHES OF SEAGRASS COMMUNITY ON THE WEST SIDE OF BURUNG ISLAND (PARI ISLANDS, SERIBU ISLANDS) AND THEIR VARIATIONS IN ABUNDANCE Hutomo, Malikusworo; Martosewojo, Sularto
Marine Research in Indonesia Vol 17 (1977)
Publisher : Research Center for Oceanography - Indonesian Institute of Sciences (LIPI)

Monthly collections of fishes in a seagrass community on the west of Burung Island, Pari Islands, were made from May 1975 to February 1976. Seventy-eight species of fishes were collected. Number of specimens, size range, and modal size are given for each month for each species. Number of species and specimens were found highest in July. Relative and total abundances of the more numerous species are summarized. Apogon margaritophorus was the predominant species in the fish community of the area. Notes on the spawning of Siganus canaliculatus are presented, since this species attracts the attention of many mariculturists. The separation of these fishes into four groups is also discussed.

NOTES ON THE DISTRIBUTION OF RED ALGAE (RHODOPHYTA) ON THE CORAL REEF OF PARI ISLANDS, SERIBU ISLANDS Atmadja, Wanda Surjana
Marine Research in Indonesia Vol 17 (1977)
Publisher : Research Center for Oceanography - Indonesian Institute of Sciences (LIPI)

Many species of red algae are economically important for their carrageenan contents. Since May 1974 to June 1975 an intensive survey on their distributions have been carried out on the fringing reef of Pari Islands, Seribu Islands. Thirty five species of Rhodophyta have been identified and their species composition and relative importance as compared to Phaeophyta and Chlorophyta have been studied. Environmental factors, such as bottom type and seasonal influence on their distribution, emphasized in the discussion. Further studies on inventory and the distribution of these algae will be continued particularly in support of the culture experiments for some of the species.

THE GORGONIAN-OVULID ASSOCIATIONS OF AN INTERTIDAL CORAL COMMUNITY ON PENANG ISLAND, WEST MALAYSIA Segal, Earl
Marine Research in Indonesia Vol 17 (1977)
Publisher : Research Center for Oceanography - Indonesian Institute of Sciences (LIPI)

Over parts of the rocky north shore of Penang Island, West Malaysia, and Pulau Tikus, a small island one mile offshore from Penang, coral communities (Gorgonacea, Alcyonacea, Scleractinia) may be found in the turbid inshore waters. These corals are bathed by the waters of the Muda River system on the mainland and by the waters fluxing through extensive mangal along the mainland and around Penang Island. The diverse components of the coral community are truly intertidal being exposed during spring low tides throughout the year. It appears as though the gorgonians of the coral community are unusual in their diversity and intertidal distributions. So, too, does it appear, are the ovulid gastropods associated with the gorgonians. I will, both orally and visually, described the Penang-Pulau Tikus intertidal coral community, elaborate on the gorgonians and their associated ovulid snails, and discuss the stresses placed upon the complex by man.

DISTRIBUTION AND ABUNDANCE OF CRYPTOFAUNA FROM LIZARD ISLAND, GREAT BARRIER REEF Hutchings, Patricia A.; Weate, Penny D.
Marine Research in Indonesia Vol 17 (1977)
Publisher : Research Center for Oceanography - Indonesian Institute of Sciences (LIPI)

A series of replicate samples of dead coral reef habitats was collected across Yonge Reef on the outer and inner reef (back reef) and on fringing reefs around Lizard Island. Five categories of habitats were selected, branching, thin plates, high percentage of live coral, solid reef, rock with either a small surface area or a large surface area, and easily broken up. The surface area, volume, percentage cover of epifauna and flora, and biomass of cryptofauna were determined for each habitat. An estimate of the percentage of cavity space (i.e. available living space for cryptofauna) occurring in each habitat was made. The cryptofauna is dominated by polychaetes, molluscs, and sipunculans. Habitats on inner Yonge have a larger biomass of cryptofauna than similar habitats found on outer Yonge or on fringing reefs around Lizard Island. Differences in physical attributes of the habitat together with exposure and surrounding species of coral and sponges may be responsible for these differences.

A PRELIMINARY STUDY ON THE ECOLOGY OF THE CORAL REEF OF POMBO ISLAND Sumadhiharga, Ono Kurnaen
Marine Research in Indonesia Vol 17 (1977)
Publisher : Research Center for Oceanography - Indonesian Institute of Sciences (LIPI)

A preliminary study on the ecology of the coral reef of Pombo Island was carried out in 1975. Pombo Island has a characteristic of an atoll and is considered a good habitat for coral and fish, including live-bait fish of commercial importance,Â Spratelloides delicatulus. Non-planktonic organisms collected consist of 39 species of corals, 56 species of molluscs, 17 species of echinoderms, 130 species of fishes and a number of crustacean species.Some ecological factors such as bottom condition, turbidity, temperatures, light intensity, and freshwater dilution are described. Population and distribution of corals and coral fishes are discussed.

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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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Kota adm. jakarta selatan,

Dki jakarta

INDONESIA