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INDONESIA
Marine Research in Indonesia
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.
Arjuna Subject : -
Articles 34 Documents
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Search results for , issue "Vol 17 (1977)" : 34 Documents clear
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)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (877.872 KB) | DOI: 10.14203/mri.v17i0.466

Abstract

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 1960's. 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.
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)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (944.137 KB) | DOI: 10.14203/mri.v17i0.467

Abstract

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.
ON THE CULTIVATION OF CAULERPA RACEMOSA VAR. OCCIDENTALIS IN THE PHILIPPINES AND SOME ASPECTS OF THE PHYSIOLOGICAL ECOLOGY Colina, A.; Horstman, U.; Schramm, W.
Marine Research in Indonesia Vol 17 (1977)
Publisher : Research Center for Oceanography - Indonesian Institute of Sciences (LIPI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1073.216 KB) | DOI: 10.14203/mri.v17i0.468

Abstract

Caulerpa racemosa, a benthic siphonaceous algae has its natural habitat in the sublittoral zone of tropical areas. In the Philippines, since a few years, it is cultivated on commercial scale in flooded ponds in the intertidal mangrove zone. Unlike in their natural habitats, Caulerpa in these ponds is subjected to sometimes considerable changes in salinity (rain, evaporation, tem-perature and light (Insolation), and in pH). The response of Caulerpa to these factors and the comparison of the ecological conditions, both in the natural habitats and the cultured ponds have been investigated. The experiments showed that the observed changes of the studied parameters normally range within the physiological limits of Caulerpa. Under extreme conditions, however, detri-mental effects can occur. Ways of controlling such factors are discussed.
SOME ASPECTS OF THE CULTURE OF EUCHEMA Horstman, U.; Colina, A.; Schramm, W.
Marine Research in Indonesia Vol 17 (1977)
Publisher : Research Center for Oceanography - Indonesian Institute of Sciences (LIPI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1410.293 KB) | DOI: 10.14203/mri.v17i0.469

Abstract

Eucheuma striatum and Eucheuma spinosum, are red algae of commercial value because of their carrageenin content, to an increasing extent are cultivated in the Philippines. The influence of environmental factors on growth rate and photosynthesis of these seaweeds were studied through observations in their natural biotope in seaweed farms, from in-situ experiments, and photosynthesis experiments in an incubator. While difference in light intensity and temperature play only a minor role, the algae were found out to be sensitive to low salinity and to the amount of dissolved gases and nutrients in the surrounding seawater. The algae can only be cultured in areas where there is sufficient current but to a cer-tain extent lack of current can be compensated by exposing the plants to wave action. This leads to certain conclusions regarding the most suitable method of commercial Eucheuma culture. Eucheuma can be successfully cultured in small rafts or in floating baskets in areas where there is insufficient current for the use of fixed nets or strings. There is evidence that-the CO2 -02 metabolism in the surrounding water plays an important role in Eucheuma growth. Eucheuma harvest can be further increased by introducing more nutrients. Fertilizing with phosphate caused a bigger increase in growth rate than with nitrogen. The method of spraying plants after temporarily removing them from the water, found to be more effective than fertilizing solutions by the use of clay pots. The presence of a bacterial disease, locally referred to as "ice-ice", was recognized as a clear indication that certain environment conditions were unfavourable for Eucheuma culture. Low salinity, in the first place, but also lack of current favors the attack of "ice-ice". Finally, it was found that Eucheuma adapts itself to its culture site in such a way that after maintaining seedlings in an area for a sufficient length of time, the cultured plants showed better growth rates and were resistent to unfavorable conditions than plants recently transferred to the area.

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