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All Journal Jurnal Ilmu dan Teknologi Kelautan Tropis ILMU KELAUTAN: Indonesian Journal of Marine Sciences

Pradina Purwati

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Author-ID : 2890556

Biochemistry, Genetics & Molecular Biology Decision Sciences, Operations Research & Management Earth & Planetary Sciences Library & Information Science

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Articles

BACTERIA ASSOCIATED HOLOTHURIANS: THE KEY OF HABITAT PREFERENCE, DIET, AND FUNCTIO Ariani Hatmanti; Pradina Purwati
Jurnal Ilmu dan Teknologi Kelautan Tropis Vol. 3 No. 1 (2011): Elektronik Jurnal Ilmu dan Teknologi Kelautan Tropis
Publisher : Department of Marine Science and Technology, Faculty of Fisheries and Marine Science, IPB University

An investigation of bacteria as holothurians’s feed carried out from May until June 2006 in Medane Bay and Kombal Bay, Lombok, Indonesia. The aims of this study are to know whether holothurians eat bacteria, to observe that bacteria are the key for holothurians’ habitat preference, and to understand the functions of bacteria in holothurians intestine. The results showed there are many kind of bacteria in the substrates and inside intestine of sea cucumber. There are no specificity in performance, species and number of bacteria which found in anterior or posterior of intestine, as well in their substrates. Therefore, the holothurians do not choose specific bacteria for their feed. Bacteria are the consequence of substrates ingested. Some of them can be microflora in holothurians intestine. Bacteria inside holothurians produce some enzymes such as protease, amylase and agarase. This function was proven by the increasing of Total Organic Matters (TOM) in their feces. This evidence supporting Wiedmeyer (1992) statement that sea cucumber adds organic matters in the sediment. So this also firm holothurians’ function in their habitat, as supplier for organic matters. The conclusion is that bacteria are eaten by holothurians by absorption, bacteria is not the key for microhabitat preference for holothurians, and inside the intestine of holothurians, digestion and degradation are the function of bacteria by producing their enzymes.Keywords: bacteria, holothurians, microhabitat preference, function

MICROHABITAT PREFERENCE OF SEASTAR IN HARI ISLAND WATERS, SOUTHEAST SULAWESI Syamsidar Gaffar; Neviaty P Zamani; Pradina Purwati
Jurnal Ilmu dan Teknologi Kelautan Tropis Vol. 6 No. 1 (2014): Electronik Jurnal Ilmu dan Teknologi Kelautan Tropis
Publisher : Department of Marine Science and Technology, Faculty of Fisheries and Marine Science, IPB University

The objective of this study was to explore the information on the microhabitat preference of asteroidea in Hari Island Waters, Southeast Sulawesi. The specimens were collected in August 2012 and December 2012. The methods used in this study were road sampling technique, freehandpicking, and observation. The geographical coordinate position of the asteroidea and microhabitat were recorded by using GPS and then mapped by using the ArcGIS 10.1. Asteroidea map was overlayed with microhabitat map to determine the microhabitat preference. The study found 9 species of asteroidea belonging to 7 generas, 4 families, and 2 orders. All the asteroidea were relatively common species in the tropical shallow waters. The species were distributed along sides of the island with majority found in the northern side. The dominant species, Linckia laevigata, was found in all microhabitat which had beed adapted to various microhabitat conditions and water fluctuation. Based on area of distribution and population density, seastar tended to use reef coral as its microhabitat preference since reef coral could serve as a food source and habitat protection. Keywords: Seastar, microhabitat preference, Hari island

Timun Laut Teluk Medana, Lombok Barat: Pola Sebaran dan Kelimpahan Pradina Purwati; Pitra Widianwary; S. A. P. Dwiono
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 13, No 4 (2008): Jurnal Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Timun laut di Teluk Medana, Lombok Barat dimonitor tiap dua minggu, mulai April sampai Juni 2006. Hasilnya berupa peta sebaran komunitas timun laut yang menunjukkan adanya 5 mikrohabitat yang tersebar di da/am teluk, dan periode terbaik untuk melakukan pengamatan in situ. Kedua informasi ini kemudian dipakai untuk menghitung jumlah timun laut di teluk tersebut. Pada Juli 2006, penghitungan jumlah nil individu timun laut diiakukan dengan bantuan Global Positioning System (GPS) untuk merekam posisi geografis setiap individu timun laut yang ditemukan. Hasilnya menunjukkan 16 spesies (dan 1 grup juvenil) dengan jumlah total 715 individu. Mikrohabitat dengan jumlah individu terbanyak adalah area padat lamun (M2 dan M3) dimana Holothuria albiventer, H. scabra, H. fuscocinerea dan Bohadschia similis menyusun >60% dari komunitas timun laut daerah tersebut. Seratus sepuluh H.atra menempati area yang relatif terbuka (M4 dan M5) secara eksklusif. H.erinaceus dan H.arenicola berbagi habitat di daerah dengan substrat pasir yang padat, dengan kepadatan 11 individu/m2. Hasil penelitian inl menunjukkan bahwa potensi timun laut di Teluk Medana diperkirakan dapat mencapai 3000 individu. Peta agregasi inijuga membuka pintu bagi penelitian karakter spesidk mikrohabitat yang dibutuhkan masing-masingpopulasi timun laut, yang mengarah ke konsep kompetisi antarpopulasi.Kata kunci: timun laut, sebaran lokal, kelimpahan, Teluk Medana, Lombok Barat

Reproduksi Aseksual Sebagai Alternatif Pemulihan Populasi Teripang Pradina Purwati; Sigit A. P. Dwiono
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 13, No 1 (2008): Jurnal Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Konservasi biota yang tingkat pemanfaatannya sangat tinggi memerlukan pengaturan penangkapan dan sekaligus pemulihannya. Ukuran populasi teripang yang terus menerus dipanen akan menurun dan pada gilirannya mengurangi peluang keberhasilan reproduksi aseksual. Oleh karena itu jumlah minimal individu teripang di suatu habitat harus dipertahankan. Di Indonesia, saat ini teripang semakin sulit ditemukan karena sediaannya di alam terbatas. Produksi benih melalui kegiatan pembenihan belum dapat diandalkan karena jumlah juvenil yang dihasilkan masih sedikit. Sementara itu, beberapa jenis teripang memiliki kemampuan untuk berkembang biak secara aseksual dengan membelah did (fission). Sejak akhir tahun 1990 kemampuan ini mulai diteliti sebagai alternatif teknik memperbanyak individu teripang. Tulisan ini akan membahas perkembangan teknik perangsangan reproduksi aseksual, mengevaluasi kelebihan dan kekurangan reproduksi aseksual dibandingkan seksual serta kemungkinan penerapannya untuk pemulihan populasi. Kata kunci : teripang, reproduksi aseksual, pemulihan.

Co-Authors Ariani Hatmanti NEVIATY PUTRI ZAMANI Pitra Widianwary S. A. P. Dwiono Sigit A. P. Dwiono Syamsidar Gaffar

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