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PENGARUH KAWASAN KONSERVASI PERAIRAN TERHADAP POPULASI IKAN KARANG DI PULAU AY DAN RHUN, KEPULAUAN BANDA, PROVINSI MALUKU Welly, Marthen; Fahrudin, Achmad; Bengen, Dietriech G.; Damar, Ario
Jurnal Ilmu dan Teknologi Kelautan Tropis Vol. 12 No. 1 (2020): Jurnal Ilmu dan Teknologi Kelautan Tropis
Publisher : Department of Marine Science and Technology, Faculty of Fisheries and Marine Science, IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (808.453 KB) | DOI: 10.29244/jitkt.v12i1.25376

Abstract

Kawasan konservasi perairan (KKP) berfungsi untuk mengelola sumber daya perikanan dan keanekaragaman hayati laut agar dapat dimanfaatkan secara berkelanjutan. Kondisi ikan karang merupakan salah satu bioindikator untuk mengukur dampak pengelolaan KKP. Tujuan dari penelitian ini adalah untuk melihat dampak pembentukan KKP Daerah (KKPD) Pulau Ay dan Pulau Rhun terhadap sumber daya perikanan karang di Kepulauan Banda, Maluku, Indonesia. Metode yang digunakan untuk pengumpulan data yaitu Underwater Visual Census (UVC) dan Fish Length Estimation dengan bantuan peralatan SCUBA. Analisis data dilakukan dengan membandingkan data sekunder dan data primer yang meliputi kelimpahan, biomassa, status tropik dan komposisi ukuran ikan besar dan ikan kecil dari 10 famili ikan target dan ekonomis penting sebelum dan sesudah Pulau Ay dan Pulau Rhun dicadangkan sebagai KKP. Hasil penelitian menunjukan bahwa kelimpahan dan biomassa ikan karang secara temporal berfluktuasi sebelum dan sesudah Pulau Ay dan Pulau Rhun dicadangkan sebagai KKP, namun masih dalam kondisi melimpah dan tinggi. Status tropik dan komposisi ukuran ikan karang berubah-ubah sebelum dan sesudah pencadangan KKP, namun masih dalam kondisi seimbang antar kelompok tropik, ikan besar dan ikan kecil. Kesimpulan penelitian ini adalah pencadangan KKPD memberikan dampak positif terhadap sumber daya ikan karang di Pulau Ay dan Pulau Rhun.
IDENTIFICATION OF POOR FISHING-DEPENDENT COMMUNITIES IN MAINLAND WEST SUMATRA Stanford, Richard J.; Wiryawan, Budy; Bengen, Dietriech G.; Febriamansyah, Rudi; Haluan, John
Buletin PSP Vol. 20 No. 1 (2012): Buletin PSP (Edisi Khusus)
Publisher : Institut Pertanian Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (544.22 KB)

Abstract

Indonesia has some of the world?s most diverse coral reefs in need of protection. These biodiversity hotspots have attracted international attention and are well described in the literature. However, they are home to only a small portion of the fishing communities in this country. The state of many of the other communities has yet to be studied in depth. As a step in that direction, this paper focuses on fishing communities in mainland West Sumatera and, using data collected by government agencies, defines two indicators that will be useful nationally. The first is a measure of the communities? dependency on fishing as a source oflivelihood, the second a measure of poverty that is appropriate to Indonesian fishing communities. For mainland West Sumatera these parameters identify five areas that are highly dependent on fishing (> 10% employment in fishing) with two of these containing large numbers of fisher households in a state of poverty. These two are Sei Beremas and Sasak Ranah Pasisie in the regency Pasaman Barat. Neither of these are located at well investigated hotspots and further work will be required to identify the underlying reasons for the combination of dependency and poverty found in these places. The methodology described in this paper isapplicable to the ongoing implementation of the national marine spatial planning program.  Keywords: fisheries, Indonesia, poverty
DISTRIBUTION AND BIOACCUMULATION OF HEAVY METALS PB AND CD ON BIVALVES ANADARA NODIFERA, MERETRIX LYRATA, AND SOLEN LAMARCKII IN COASTAL WATERS OF THE WEST MADURA STRAIT Ahyar, .; Bengen, Dietriech G.; Wardiatno, Yusli
Jurnal Ilmu dan Teknologi Kelautan Tropis Vol. 9 No. 2 (2017): Elektronik Jurnal Ilmu dan Teknologi Kelautan Tropis
Publisher : Department of Marine Science and Technology, Faculty of Fisheries and Marine Science, IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (564.971 KB) | DOI: 10.29244/jitkt.v9i2.19297

Abstract

Madura strait receives waste disposal from various activites in the mainland, making it vulnerable to contamination of harmful pollutants. Some of the harmful pollutants are heavy metal Pb and Cd. The high concentration Cd and Pb give negative impacts to the biota including bivalves. This study was conducted to assess the distribution of heavy metals Pb and Cd in the waters and their accumulation in bivalves Anadara nodifera, Meretrix lyrata, and Solen lamarckii in coastal waters of the West Madura Strait. Heavy metal analysis refer to APHA 2012 using AAS. The results showed that concentration of Cd and Pb in water were below the quality standards, while in sediment were above the standard (Cd of 7.20 mg/kg and Pb of 62.06 mg/kg). The concentration of Cd in bivalve were different among the species tested A. nodifera of 6.10 mg/kg, M. lyrata of 3.65 mg/kg, and S. lamarckii of 2.74 mg/kg, as well as Pb concentration A. nodifera of 60.10 mg/kg, M. lyrata of 51.48 mg/kg, and S. lamarckii of 45.29 mg/kg). These results indicated that the three shells have exceeded the maximum limit of heavy metal contamination in food (Cd of 1.0 mg/kg and Pb of 1.5 mg/kg). Keywords: bivalve, heavy metal, Madura Strait
HUBUNGAN ANTARA KETERSEDIAAN CAHAYA MATAHARI DAN KONSENTRASI PIGMEN FOTOSINTETIK DI PERAIRAN SELAT BALI Fauziah, Anna; Bengen, Dietriech G.; Kawaroe, Mujizat; Effendi, Hefni; Krisanti, Majariana
Jurnal Ilmu dan Teknologi Kelautan Tropis Vol. 11 No. 1 (2019): Jurnal Ilmu dan Teknologi Kelautan Tropis
Publisher : Department of Marine Science and Technology, Faculty of Fisheries and Marine Science, IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (821.671 KB) | DOI: 10.29244/jitkt.v11i1.23108

Abstract

ABSTRAKCahaya matahari merupakan salah satu faktor lingkungan terpenting baik secara langsung maupun tidak langsung bagi organisme fotosintetik perairan dalam menyediakan energi untuk diubah menjadi energi kimia dengan bantuan klorofil. Penelitian ini bertujuan untuk mengkaji hubungan antara ketersediaan cahaya matahari  dan konsentrasi pigmen fotosintetik di Perairan Selat Bali. Penelitian dilaksanakan pada pagi, siang dan sore hari pada lima stasiun penelitian di Perairan Selat Bali. Analisis korelasi kanonik digunakan untuk mengetahui hubungan antara ketersediaan cahaya matahari dan pembentukan pigmen fotosintetik. Hasil penelitian menunjukkan bahwa intensitas cahaya matahari (Y2) lebih berpengaruh terhadap pembentukan pigmen klorofil-b (Y1) dengan korelasi kanonik sebesar 0,4512 bilamana dibandingkan dengan pembentukan pigmen klorofil-a (Y1) dengan nilai korelasi sebesar 0,3982. Semakin tinggi pembentukan pigmen klorofil-b (Y1) dapat meningkatkan pembentukan pigmen karotenoid (Y1) secara signifikan dengan nilai korelasi kanonik sebesar 0,7419. Kesimpulan dari hasil ini, bahwa pigmen klorofil-b dan pigmen karotenoid akan terbentuk secara optimum pada intensitas cahaya rendah. ABSTRACTSunlight is one of the most important environmental factors both directly and indirectly for  photosynthetic organisms in providing energy to be converted into chemical energy with the help of chlorophyll. This study aims to examine the relationship between the availability of sunlight and the concentration of photosynthetic pigments in Bali Strait waters. The study was conducted in the morning, midday and afternoon at five research stations in the Bali Strait waters. Canonical correlation analysis was used to determine the relationship between sunlight availability and photosynthetic pigment formation. The results showed that the intensity of sunlight (Y2) had more influence on the formation of chlorophyll-b (Y1) pigments with canonical correlation of 0.4512 when compared with the formation of chlorophyll-a (Y1) pigment with a correlation value of 0.3982. The higher formation of chlorophyll-b (Y1) pigments can significantly increase the formation of carotenoid pigments (Y1) with canonical correlation values of 0.7419. From these results it can be concluded that chlorophyll-b pigments and carotenoid pigments will be formed optimally at low light intensities.
ESTIMASI NILAI EKSTERNALITAS KONVERSI HUTAN MANGROVE MENJADI PERTAMBAKAN DI DELTA MAHAKAM KABUPATEN KUTAI KARTANEGARA Setiawan, Yunianto; Bengen, Dietriech G.; Kusmana, Cecep; Pertiwi, Setyo
Jurnal Penelitian Hutan Tanaman Vol 12, No 3 (2015): JURNAL PENELITIAN HUTAN TANAMAN
Publisher : Pusat Penelitian dan Pengembangan Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (537.386 KB) | DOI: 10.20886/jpht.2015.12.3.201-210

Abstract

Penurunan manfaat dari ekosistem mangrove baik secara langsung maupun tidak langsung disebabkan oleh konversi hutan mangrove menjadi tambak. Untuk mengembalikan kondisi lingkungan, pemerintah melakukan rehabilitasi tambak dengan menerapkan sistem tambak wanamina. Penelitian ini bertujuan mengestimasi nilai sylvofishery eksternalitas kawasan mangrove yang dikonversi menjadi tambak di Delta Mahakam dan menghitung analisis usaha budidaya tambak dengan sistem ekstensif-tradisional serta sistem wanamina. Hasil penelitian menunjukkan nilai manfaat yang hilang mencapai Rp 209.688.551.071 per tahun dari hutan mangrove yang telah dikonversi menjadi tambak seluas 75.311 hektar. Nilai BCR tambak sistem ekstensif-tradisional menunjukan nilai negatif dan tambak sistem wanamina bernilai positif artinya bahwa pemanfaatan tambak dengan sistem wanamina akan mendatangkan keuntungan dan layak dilaksanakan pada saat ini.
PHYSIOLOGICAL RESPONSE OF THALLASIA HEMPRICHII ON ANTROPHOGENIC PRESSURE IN PARI ISLAND, SERIBU ISLANDS, DKI JAKARTA Nugraha, Aditya Hikmat; Bengen, Dietriech G.; Kawaroe, Mujizat
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 22, No 1 (2017): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (626.1 KB) | DOI: 10.14710/ik.ijms.22.1.40-48

Abstract

Seagrass ecosystem is one of tropical marine ecosystem and have important function. The function of ecosystem like a feeding and nursery ground for marine biota. Antrophogenic pressure is one of threat for seagrass ecosystem sustainability. This research study about effect antropogenic pressure for seagrass Thallasia hemprichii physiology response in some different location at Great Barrier Pari Island. The physiology response study cover growth, heavy metal bioaccumulation and histology analysis. The result shows that growth of leaf and rhizome Thalassia hemprichii have positif correlation with nutrient consentration in environment. The highest growth of leaf Thalassia hemprichii at 2nd station (4.16 mm.day-1) and the highest growth of rhizome Thalassia hemprichii at 4th station (1.3 mm.day-1). Seagrass can accumulation heavy metal from environment. The highest heavy metal accumulation is Pb. Not correlation between heavy metal consentration in seagrass with heavy metal concentration from environment. Analysis histology result that not damage seagrass tissue in all research station. Keyword : Bioacumulation,Growth,Physiology,Seagrass, Thalassia hemprichiiSeagrass ecosystems is one of the tropical marine ecosystems that have important functions, among others as a feeding and nursery ground for marine life. Anthropogenic stress is one of the threats that may inhibit the survival of seagrass ecosystems. This study examines the effects of anthropogenic pressures on physiological responses of seagrass Thalassia hemprichii at several different locations in Pari Islands. Physiological responses studied were leaves and rhizome growth, bioaccumulation of heavy metals and histological tissue analysis on seagrass. The results showed that the growth response of seagrass has a positive correlation with the nutrients in the environment. Seagrass leaf growth is highest at Station 2 (4.16 mm.day-1) and rhizome growth is highest at Station 4 (1.3 mm.day-1). Seagrass accumulate heavy metals from the environment and accumulation of heavy metals is highest on Pb. There is no correlation between the concentration of heavy metals in the seagrass and environment. The results of histological analysis showed that there was no damage to the tissue of seagrass leaf and rhizome. Keywords : Bio-acumulation, Growth, Physiology, Seagrass, Thalassia hemprichii
ABUNDANCE OF PHYTOPLANKTON IN THE COASTAL WATERS OF SOUTH SUMATERA Aryawati, Riris; Bengen, Dietriech G.; Prartono, Tri; Zulkifli, Hilda
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 22, No 1 (2017): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (359.479 KB) | DOI: 10.14710/ik.ijms.22.1.31-39

Abstract

Phytoplankton in the ocean has an important role in forming the base of food chain,  responsible in primary production. Its abundance and number of phytoplankton species will indirectly affect the level of water?s fertility. This study aimed to determine the presence of phytoplankton as bio-indicators of water quality in terms of abundance, diversity index, uniformity index, and saprobic coefficient in coastal waters of South Sumatera. The study was conducted on May 2013 - February 2014, at ten stations during high and low tides. Phytoplankton samples were taken vertically using plankton nets,  cone-shaped with a diameter of 30 cm, length 100 cm and mesh size 30 ?m. The study found 41 genera of phytoplankton, consisted of family Bacillariophyceae (26 genera), Dinophyceae (7 genera) Cyanophyceae (7 genera) and Chlorophyceae (1 genus). The highest number of genera was recorded while low tides in November (24 genera), and the lowest was on May while high tides (16 genera). The highest abundance of phytoplankton was recorded in August during high tides (2,68 x 107 cell.m-3), and the lowest was in May during high tides (6,59 x 105cell.m-3). The diversity index (H'),  the uniformity index (E), and the dominance index (D) ranged between 0,64?3; 0,15?0,71 and 0,15?0,83 respectively.  Keywords: phytoplankton, abundance, diversity index, South Sumatera coast.
SUSTAINABILITY ANALYSIS OF MANGROVE ECOSYSTEM FOR ECOFISHERYTOURISM IN SIDOARJO LUMPUR ISLAND Prasenja, Yanelis; Alamsyah, Abimanyu Takdir; Bengen, Dietriech G.
Jurnal Ilmu dan Teknologi Kelautan Tropis Vol. 9 No. 1 (2017): Elektronik Jurnal Ilmu dan Teknologi Kelautan Tropis
Publisher : Department of Marine Science and Technology, Faculty of Fisheries and Marine Science, IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (362.323 KB) | DOI: 10.29244/jitkt.v9i1.17940

Abstract

Sidoarjo Lumpur Island is an artificial island created as a solution to the handling of sediment deposition in Porong River Estuary as a result of the mudflow which flowed into the sea via the Porong River. Lumpur Island is currently utilized as a habitat for mangrove ecosystem extension as well as a site for  aquaculture with wanamina system (silvofishery). Ecofisherytourism is a way to utilize mangrove ecosystem for ponds silvofishery based on educational and economic approach to achieve the welfare of society. In addition, ecofisherytourism has a direct  benefit of preserving nature and the environment. The research objective was to evaluate the condition of the mangrove ecosystem and analyze the physical condition of the Sidoarjo Lumpur Island as a reference in developing the island as ecofisherytourism region. The methods used were a combination of quantitative and qualitative methods. Data were collected through analysis of aerial photographs, field measurements, observation and documentation. Mangrove ecosystem conditions in Lumpur Island was classified as good  to be utilized as ecotourism and fisherytourism . The highest elevation of the island is the tidal zone where mangroves grow well.                                                                                          Keywords: ecofisherytourism, mangrove, silvofishery
POPULATION STRUCTURE AND MORPHOMETRY OF HORSESHOE CRAB CARCINOSCORPIUS ROTUNDICAUDA, LATREILLE 1802 IN KAMPUNG GISI COASTAL AREA OF BINTAN BAY OF RIAU ISLANDS PROVINCE Anggraini, Rika; Bengen, Dietriech G.; Natih, Nyoman Metta N.
Jurnal Ilmu dan Teknologi Kelautan Tropis Vol. 9 No. 1 (2017): Elektronik Jurnal Ilmu dan Teknologi Kelautan Tropis
Publisher : Department of Marine Science and Technology, Faculty of Fisheries and Marine Science, IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (410.567 KB) | DOI: 10.29244/jitkt.v9i1.17934

Abstract

Horseshoe crab, Carcinoscorpius rotundicauda is frequently found in the coastal zone of Bintan Bay of Riau Islands Province. The study was conducted from August to September 2016 in coastal area of Kampung Gisi, Bintan bay. The aims of the study were to analyse the population structure and morphometric characters of horseshoe crab and its relation to the coastal environmental characteristics. Sampling of horseshoe crab was taken using belt transect method, and coastal environmental parameters were measured in-situ. The results show that b values of length-weight relationship were found to be 3.3 (male) and 2.6 (female) respectively. Furthermore, the growth pattern of males were positive allometric, and females were negative allometric. Horseshoe crab are closely related to sandy mudflats sediment, brackish water salinity and mangrove habitat distribution.  Keywords: horseshoe crab, population structure, morphometry, environmental characteristics, Bintan Bay
COMPOSITION AND ANTIBACTERIAL ACTIVITIES OF MARINE SPONGES FROM DIFFERENT SEAGRASS ECOSYSTEMS IN KEPULAUAN SERIBU WATERS, JAKARTA Ismet, Meutia Samira; Bengen, Dietriech G.; Radjasa, Ocky Karna; Kawaroe, Mujizat
Jurnal Ilmu dan Teknologi Kelautan Tropis Vol. 8 No. 2 (2016): Elektronik Jurnal Ilmu dan Teknologi Kelautan Tropis
Publisher : Department of Marine Science and Technology, Faculty of Fisheries and Marine Science, IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (779.723 KB) | DOI: 10.29244/jitkt.v8i2.15838

Abstract

A seagrass ecosystem has high productivity that supports many species of associated invertebrates, including sponges. However, seagrass beds with different habitat condition, including seagrass species composition and architectural morphotypes could affect the associative sponge in the ecosystem.   This study is aimed to find out about sponge species composition in different seagrass beds. The observation was conducted in two seagrass ecosystems at the east (site 1) and at the southeast (site 2) of Pramuka Island, Kepulauan Seribu, near Jakarta Bay, Indonesia. The Belt Transect was used to assess the density of sponges on the seagrass ecosystem, which was placed parallel to the coastline. The sponges species has higher number at the east than the southeast, with both sites was dominated by Spirastrella sp. and Agelas conifera. Correspondence Analysis (CA) results showed that sponges community has close interaction with seagrass abundance especially Cymodocea rotundata and Enhalus acoroides and architectural characteristic (patchily or continues meadows). Antibacterial assay of sponges tissue showed that only 7 sponge species has activity against targeting bacteria. The CA results also showed that sponge antibacterial activity was not correlated with seagrass species, with low bactericide and bacteriastatic activities. The implication of this result showed that sponges community can grow up at seagrass ecosystem eventhough their potential secondary metabolite activities is very low probably due to lack of stimulus mechanisms in the environment.