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"Spatial distribution and some ecological aspect of hermit-crabs pagurus spp. In the intertidal shore of Pulau Dua Natural reserve, Banten bay.Pulau Dua natural reserve,as a bird sanctuary, is now threatened by water pullution and environmental degradation. To monitor is condition,an observation of the biotic intertidal comunity has been taken. One of the biotic intertidal comunities is hermit-crab (Pagurus spp). There are two species of crabs, namely Pagurus granosimanus and Pagurus hursutiusculus. Their weight are 202.80 mg and 724.90 mg. and their body lenghts are 13.00 mm and 20.71 mm respectively.The spatial distribution of the species is contagious and cluster (V=16.84)>Environmental factors such as air and water temperature,pH and water salinity,were measured"

"Plankton and fish communities of rumpon waters around pramuka Island (Seribu Islands)"

"Sumberdaya terumbu karang di Pulau Tidung telah lama dimanfaatkan oleh masyarakat setempat untuk berbagai keperluan. Pada saat ini sebagian masyarakat Pulau Tidung menggantungkan hidupnya sebagai penyedia jasa kegiatan wisata yang sebelumnya berprofesi sebagai nelayan. Adanya kegiatan wisata di Pulau Tidung yang tanpa terkendali yang memanfaatkan keindahan karang dapat berdampak terjadinya penurunan kualitas terumbu karang di sekitarnya. Metode pengamatan untuk mengamati tingkat kerusakan karang adalah Line Intercept Transect dan faktor lingkungan diamati dengan pengukuran berbagai parameter lingkungan perairan secara langsung di lapangan. Aspek sosial ekonomi dan pengelolaan dikaji dari berbagai peraturan yang telah ada dan wawancara secara mendalam dengan penduduk setempat dan wisatawan. Penelitian ini membahas mengenai kondisi kerusakan terumbu karang dan faktor penyebabnya baik faktor antropogenik maupun non-antropogenik serta pengelolaan terumbu karang di Pulau Tidung. Beberapa faktor yang diamati yaitu kondisi perairan, kondisi terumbu karang, aspek sosial masyarakat dan kebijakan pengelolaan terumbu karang. Kondisi perairan meliputi suhu, kecerahan, kecepatan arus, pH, salinitas, fosfat dan nitrat. Kondisi karang meliputi persentase tutupan karang, indeks keanekaragaman, dan indeks dominasi. Penelitian dilaksanakan selama bulan Juni – Agustus 2011. Hasil penelitian menunjukkan bahwa kondisi terumbu karang di Pulau Tidung dalam kondisi rusak - sedang dengan persentase tutupan karang hidup antara 21,41% – 30,19%. Indeks keanekaragaman tutupan berkisar antara 2,0423 – 2,1495 dan indeks dominasi tutupan berkisar antara 0,1433 – 0,1466, nilai tersebut memperlihatkan adanya keanekaragaman dan tekanan lingkungan yang sedang, dan tidak adanya dominasi tutupan karang tertentu. Parameter kualitas air laut memperlihatkan masih dalam ambang batas normal untuk kehidupan karang. Faktor antropogenik berupa kegiatan pariwisata, penambangan karang, pengeboman dan pengoperasian kapal di daerah terumbu karang diduga berperan terhadap kerusakan karang di Pulau Tidung. Pengelolaan terumbu karang di Pulau Tidung telah diatur melalui beberapa peraturan baik secara nasional maupun oleh pemerintah setempat, namun pelaksanaannya belum optimal sehingga diperlukan implementasi kebijakan yang lebih baik dengan menerapkan program kesadaran masyarakat, penegakan hukum dan peran masyarakat secara aktif dalam mengelola sumberdaya laut.

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Coral reef resources in Tidung Island has been used by local people for various purposes. At this time most of local people working as a travel provider or tourist guide. The existence of tourist activities in Tidung Island that utilizes the exotic of coral reefs affect the condition of coral reefs in this area. Observation method to observe the level of coral damage is Line Intercept Transect and environmental factors observed by measuring several water quality parameters. Socio-economic and management aspects examined from existing regulations and interviews with local people and tourists. The aim of this study is to discuss the coral condition and the causes of coral degradation including anthropogenic factors, non-anthropogenic and management of coral reefs in Tidung Island, Seribu Islands, north off Jakarta. Several factors were observed, namely the condition of waters, coral reefs, and social aspects and management. Water conditions include temperature, brightness, speed of flow, pH, salinity, phosphate and nitrate, and the condition of coral include life form percentage, index of diversity, and dominance index. The research was conducted during June to August 2011. The results show that the condition of coral reefs in Tidung Island was categorised bad condition to moderate with the percentage of life form ranges between 21.41% - 30.19%. Index of diversity ranged from 2.0423 to 2.1495 and dominance index ranged between 0.1433 to 0.1466. These showed ​​that the level of diversity and environmental pressures are medium, and has no a spesific type of coral cover that dominates in coral reefs. Water quality parameters are still within normal limits for coral life. Anthropogenic factors such as tourism, mining coral, destructive fishing (bombings) and the operation of ships in coral reef are thought to contribute to destruction of coral reef in Tidung Island. Management of coral reefs in Tidung Island has been governed by several regulations by both national and local government, but the implementation has not been optimized so the implementation of better policies by implementing public awareness programs, law enforcement and community participation in managing marine resources is needed."

"ABSTRAKPenelitian mengenai Struktur Komunitas Diatom dari Dinoflagellata di perairan sekitar Pulau Pari, yang termasuk wilayah Kepulauan Seribu, telah dilakukan pada bulan Juni 1997, Oktober 1997, dan Januari 1998. Pengambilan sampel dilakukan di 8 (delapan) stasiun. Sampling menggunakan jaring Kitahara bentuk kerucut panjang 1 m, diameter 31 mikrometer dan mata jarinq 20 mikrometer, pengambilan sampel dilakukan secara horizontal. Sampel yang tersaring ditetesi formalin 4 %, dicacah dibawah- mikroskop perbesaran 40-,100 kali. Parameter lingkungan yang diamati adalah suhu, salinitas dan curah hujan.Dari hasil identifikasi ditemukan sebanyak- 68 jenis, 26 marga dan 17 suku. Kelompok diatom melimpah dengan jumlah anggota 31 jenis, 20 marga, dan 14 suku. Frekuensi kehadiran tertinggi ditemukan pada Chaetoceros decipiens (100 %), Thalassiothrix nitzschioides (87,50 %) dan Thrachyneis debyi (75,00 %). Chaetoceros decipiens paling melimpah pada bulan Januari 1998 dengan kepadatan 26.693,3 sell]. Thalassiothrix nitzschioides melimpah pada bulan Juni 1997 dengan kepadatan sel 889,9 sell]. Pada bulan Oktober 1997 Thrachyneis debyi melimpah dengan kepadatan 817,5 sell]. Keanekaragaman jenis diatom berkisar antara-0,31 - 0,73, kemerataan jenis 0,23 - 0,41, kekayaan jenis 0,43 - 0,91.Kelompok dinoflagellata mempunyai jumlah anggota 37 jenis, 6 marga, dan 2 suku. Frekuensi kehadiran tertinggi ditemukan pada Ceratium furca (62,50 %), Prorocentrum micans. (25,00%) dan Peridinium depressum (37,50 %). Ceratium furca melimpah pada bulan Juni 1997 dengan kepadatan 130,4 sell. Prorocentrum micans melimpah pada- bulan Oktober 1997 dengan kepadatan 10,3 sell. Peridinium depressum melimpah pada bulan Januari 1998 dengan kepadatan 33,1 sell: Pengaruh musim turut menentukan komposisi dan kelimpahan jenis diatom dan dinoflagellata.Hasil analisis kluster diatom dengan batas keputusan 50 % dari ke tiga musim pengamatan membentuk 3 --6. kelompok komunitas; diperkirakan karena sangat bervariasinya jumlah jenis di stasiun-stasiun penelitian. Hasil analisis kluster antar stasiun untuk dinoflagellata bulan Juni- 1997, Oktober 1997, dan Januari 1998 tidak membentuk pengelompokan (7 kelompok / komunitas) sehingga terpisah satu-sama lain, kecuali- St4 (Tanah. Miring)-dan- St 5-( Kelapa Tinggi) (Juni 1997), Stasiun 2 ( Goba Kuanji) dan St 7 (Goba Labangan Pasir) (Oktober 1-997) dan St 6 ( Pari Rataan- Terumbu} dan St 8- ( Goba Chris) (Januari 1998).

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ABSTRACT

Diatoms and Dinoflagellates are dominant groups- of marine- phytoplankton, and are important in the marine food chain. Diatoms and Dinoflagellates live in various habitats, freshwater, estuarine and marine; Information about diatoms in Indonesia is especially from reports of Lebour(1925) ; Delsman (1939) ; Zeitzschel (1978) ; and Taylor (1979). information concerning diatoms and dinoflagellates in Pari Islands waters (estuarine) is very limited. The water of Pari Islands is- a unique- ecosystem. This area- has various living organism i.e. diatoms and dinoflagellates. A study on the community Structure of Diatoma and Dinoflagellate in Pari Islands Waters. was conducted in June 1997, October 1997 and January 1998.

The aim of the study is to find out the species diversity and the fluctuation of diatoms and dinoflagellates communities , the relationship of the community structure of diatoms and dinoflagellates related the environmental factors in Pari Islands waters at three seasons.

Sixty-eight species belonging to twenty-six families were recorded. They consist of 31 species of diatoms, 20 families ,14 genus and 37 species of dinoflagellates, 6 families and 2 genus. Two species showed high frequency of occurrence and abundance at dry seasons and wet seasons i.e. Thalassiothrix nitzschioides and Chaetoceros decipiens, Ceratium furca, and Prorocentrum emarginatum at dry seasons and wet seasons. This indicated that two spesies were common and more widely distributed than others. The highest diversity, richness and evennes indices of diatom spesies were found in Kelapa Tinggi (St 5) at three seasons

Cluster analysis resulted one group throughout the study in June 1997, October 1-997 and- January- 1-998. Stations 1.,2,8;5,4,7 had closer relationship than Station 3 and St 6. The- conditions of Pari Islands- waters showed. that the- salinity ranged from 30 - 33 ° loq- the- temperature. ranged from .27 - -29 °C, and the. rainfall ranged from 25,4 - 494 milimetre/month.

The Environmental conditions. were- also monitored. Result showed- than the environmental conditions of the Pari Islands water were still appropriate for nursery grounds. of several. biota- and suitable for spawning ground- of certain spesies . The great varieties of species (phytoplankton) i.e : diatoms and dinoflagellates in- the- Pari Islands- water show that this ecosystem its very productive site for marine biota."

"ABSTRAKUntuk mengetahui pengaruh kondisi lingkungan terhadap struktur komunitas fitoplankton pada musim kemarau di perairan Teluk Ambon telah dilakukan sampling harian selama 30 had dan bulan Januari-Februari 1996 dengan waktu yang tetap, yaitu antara 08.00-10.00 WIT di tiga titik stasiun pengamatan. Parameter lingkungan yang diamati adalah kandungan klorofil-a, suhu perairan, salinitas, fosfat, nitrat, nitrit, oksigen, pH dan turbiditas. Sampling pertama ini diambil pada kedalaman 5 m. Sampling kedua di lima titik pengamatan di perairan Teluk Ambon Dalam, sebanyak empat kali pengamatan dari permukaan sampai kedalaman 20 m.Analisis data menggunakan statistik multivariabel, yaitu berdasarkan analisis komponen utama (Principal Component Analysis) dan analisis faktorial koresponden (Correspondent Analysis). Data sekunder diperoleh dari Badan Meteorologi dan Geofisika, a.l. curah hujan dan prosentase intensitas penyinaran matahari.Pada saat pengamatan, faktor lingkungan yang sangat mempengaruhi struktur komunitas fitoplankton di perairan Teluk Ambon adalah curah hujan. Fitoplankton yang mendominasi adalah dari kelompok diatom marga Chaetoceros. Struktur komunitas fitoplankton baik sebaran secara mendatar (horizontal distribution) dan sebaran tegak (vertical distribution) mempunyai keanekaragaman yang tinggi akibat dinamisnya pergerakan massa air karena pengaruh pasang-surut harian dari Laut Banda. Perairan Teluk Ambon Dalam sangat peka terhadap pengaruh sedimentasi dan pencemaran, untuk itu diperlukan suatu pencegahan pembuangan limbah dan pembukaan lahan secara rasional.

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ABSTRACT

Ambon Bay is located in the Island of Ambon in the Molluccas. The Bay has a unique oceanographic environment. It has a shallow nentic inner bay (IAB) and a deep oceanic outer bay (0AB), which is strongly influenced by the Banda Sea. The OAB and The lAB are separated by a narrow sill of 15 m depth.

Multivariate Analysis of Community Structure of Phytoplankton And Related Environmental Factors in Ambon Bay. Daily sampling of phytoplankton and enviromental data were carried out at three stations from January to February 1996, between 08.00 to 10.00 p.m., at 5 m depth. The environmental parameters were observed, such as temperature, salinity, phosphate, nitrate, nitrite, dissolved oxygen, pH and turbidity. In dry season, the community structure of phytoplankton in the Ambon Bay water was dominated by diatoms, such as the genera of Chaetoceros, Nifszchia, Rhisozolenia and Bacteriastrum. The abundance of phytoplankton ranged from 1.0 x 102 to 61.350 x 103 cell L-'. Daily fluctuations of phytoplankton diversities were high and diversities among stations were significantly different (p<0.05).

Hydrological conditions in The Ambon Bay were varied. Water temperature ranged from 27.60 to 30.50 °C, salinity ranged from 30 to 32 %, dissolved oxygen ranged from 4.28 to 4.37 ml concentration of phosphate ranged from 0.5 to 1.0 µg at. P04 ?P concentration of nitrate ranged from 0.1 to 1.5 µg at. N03-N L', concentration of nitrite ranged from 0.1 to 0.7 µg at. N02 -N L'', and pH ranged from 6.2 to 7.2. The highest rain fall was recorded at first observation (43.1 mm). The percentage of sun shine ranged from 8 to 100 %. The turbidities ranged from 0.12 to 1.98 NTU. Multivariate analysis shows that rain, turbidity and temperature influenced the community structure of phytoplankton.

Spatial Distribution of Chlorophyll-a And Community Structure of Phytoplankton in Inner Ambon Bay. Weekly sampling of phytoplankton and chlorophyll-a were carried out from January to February 1996, from the surface, 5, 10, 15 and 20 m depth at five stations. The abundance of phytoplankton from the surface to 20 m depth, ranged from 4.5 x 102 to 40.140 x 103 cell Six species of phytoplankton were identified, namely Chaetoceros diversum, Dytilum sot, Liptocylidricus danicus, Nitszchia pacifrca, Plantoniella so! and Noctiluca scinti/ans. Vertical distribution of phytoplankton diversities were heterogeneous. Concentration of chlorophyll-a from the surface to subsurface ranged from 0.196 to 5.044 mg m'. It seems that vertical distribution of chlorophyll-a did not correspond with the abundance of phytoplankton. The abundance of phytoplankton in the Inner Ambon Bay was strongly influenced by the daily tide."

"Penelitian mengenai Polychaeta di hutan mangrove, perairan Teluk Kotania, Seram Barat telah dilakukan pada bulan Februari 1996. Dari sampel yang telah dikumpulkan diketahui bahwa di lokasi Teluk Kotania terdapat 40 jenis Polychaeta yang digolongkan ke dalam 36 marga dan 13 suku. Dua jenis di antaranya mempunyai frekwensi kehadiran yang tinggi yaitu Pulliella sp dan Armandia intermedia masing-masing (89%). Rata-rata kepadatan individu Polychaeta di lima lokasi berkisar antara 12.102 individu/m3 - 21.307 individu/m3 , keanekaragaman jenis berkisar antara 2,44 - 3,78 dan kemerataan jenis berkisar antara 0,56 - 0,78. Nilai indeks keanekaragaman dan kemerataan jenis di lima lokasi penelitian sangat ditentukan oleh kontribusi Pulliella sp dan Armandia intermedia. Hasil pengukuran terhadap faktor fisik lingkungan diperoleh kisaran nilai rata-rata salinitas 22,50/00 - 27°loo; suhu 29,5°C - 31°C dan pH 7,8 - 8,4. Sedangkan hasil analisis terhadap tekstur sedimen menunjukkan bahwa umumnya lokasi penelitian bersubstrat pasir sangat kasar, kecuali Pulau Burung didominasi oleh pasir sedang. Hasil analisis cluster dan analisis diskriminan di lima lokasi membentuk dua kelompok. Kelompok I terdiri atas Pulau Tatumbu dan Pulau Burung, sedangkan kelompok II terdiri dari Pelita Jaya 2, Pulau Buntal, dan Pelita Jaya I. Pengelompokan tersebut berdasarkan kepadatan jenis dan substrat. Janis Polychaeta yang menyebar pada jarak 0 - 45 m adalah Armandia intermedia, Pulliella sp dan Aphelia sp. Hasil analisis koresponden mendapatkan bahwa pengelompokan terbentuk berdasarkan kepadatan dan spesifikasi jenis di lokasi tertentu.

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Polychaeta is a group of invertebrates which is important in the marine food chain, particularly for demersal fishes, shrimps, and crabs. Polychaeta lives in various habitats, in muddy, sandy, and stony bottoms. Information about Polychaeta in Indonesian waters, especially in Maluku waters, has not yet been known well. Based on those fact, a research on the community structure and distribution of Polychaeta of mangrove forest in the waters of Kotania Bay was conducted in February 1996. Samples were collected from five stations using a transect method. The aim of the study was to find out the relationship of Polychaeta community structure with the environmental factors in Kotania Bay. The distribution of Polychaeta of mangrove forest in Kotania Bay was also studied. Hopefully, the results of this study can be used as basic information for futher research. During the study, 40 species of Polychaeta belonging to 36 genera of 13 families were collected from the locality. Two species showed high frequency of occurrence (89%), i.e. Pa/lie/la sp and Armandia infermedia. This indicated that the two species were common and distributed more widely than the others. The highest' density of Polychaeta was in Burung Island (21.307 indlm3) and the lowest was in Pelita Jaya 1 (12.102.ind/m3). The highest density of Polychaeta in Burung Island was mainly due to the highest density of Pulliella sp, Armandia intermedia, and A. lepfocirrus. The highest diversity and evenness indeces of Polychaeta species were found in Buntal island. Tatumbu Island and Burung Island had the highest similarity index. The water conditions of Kotania Bay showed that salinity ranged from 22,5°100 to 27°1°0, temperature ranged from 29,5°C to 31°C, and pH varied between 7,8 and 8,4. Substrates mostly contained sand with the very high percentage of very coarse sand. Cluster analysis divided the five station into two groups : Group 1, defined by Tatumbu Island and Burung Island, and Group II, defined by Pelita Jaya 2, Buntal Island, and Pelita Jaya 1. Discriminant analysis also divided the stations into two groups. Medium sand in the substrat was responsible in separating the five stations into two different communities. Factorial Correspondence Analysis (CA) classified the species of Polychaeta into four group based on species densities and specification of species in the location."

"Tuna mata besar merupakan komoditas ekspor. Di PPN Palabuhanratu tuna merupakan hasil tangkapan dominan. Jenis tuna yang terbanyak didaratkan adalah tuna mata besar. Untuk itu perlu dilakukan penelitian mengenai status perikanan tuna mata besar. Pengumpulan data dilakukan dengan metode sampling bertujuan. Jumlah sampel tuna mata besar sebanyak 397 ekor diambil secara acak pada armada longline yang siap melakukan bongkar. Analisis data menggunakan surplus produksi dan Model Von Bertallanfy Growth Function. Hasil penelitian menunjukkan bahwa produktivitas tuna mata besar yang didaratkan di PPN Palabuhanratu mengalami kecenderungan yang meningkat. Pola pertumbuhan tuna mata besar bersifat allometrik negatif dengan bentuk tubuh kurang pipih. Tuna mata besar yang tertangkap sudah berumur sekitar 2 tahun dan sudah mengalami fase pemijahan. Tingkat pemanfaatan tuna mata besar sudah padat tangkap (82,43 %), sedangkan tingkat pengusahaan sudah lebih tangkap (104,21 %).

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Bigeye Tuna is an export commodity. Tuna is the predominant catches in PPN Palabuhanratu. Species of tuna that ever landed was a bigeye tuna. Therefore, need to do studies about the status of the bigeye tuna. Data collection is conducted by purposive sampling. The number of bigeye tuna samples are 397 taken at random on the longline fleet ready unloaded. Data analysis using the surplus production and Von Bertallanfy Growth Model funcion.

The results showed that the productivity of the bigeye tuna landed in PPN Palabuhanratu experiencing an upward trend. Bigeye tuna pattern of growth is negative allometrik with less flattened body shape. Bigeye tuna caught about 2 years old and has been through a phase of spawning. Utilization rate of bigeye tuna is already intense capture (82.43%), while the rate of operation already overfishing (104.21%)."