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INDONESIA
JURNAL ILMIAH PLATAX
Published by Universitas Sam Ratulangi
ISSN : 23023589     EISSN : -     DOI : -
Core Subject : Social,
Environmental Science
Mencakup Penulisan yang berhubungan dengan pelaksanaan penelitian yang dilakukan secara mandiri, atau kelompok, dan berdasarkan Ruang Lingkup Pengelolaan Wilayah Pesisir, Konservasi, Ekowisata, dan Keanekaragaman Hayati Perairan.
Arjuna Subject : -
Articles 482 Documents
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Kondisi Ekologi dan Pemanfaatan Sumberdaya Mangrove di Desa Tarohan Selatan Kecamatan Beo Selatan Kabupaten Kepulauan Talaud Rivay Ontorael; Adnan S. Wantasen; Ari Berty Rondonuwu
Jurnal Ilmiah PLATAX Vol. 1 No. 1 (2012): (Edisi September - Desember 2012)
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jip.1.1.2012.492

Abstract

KONDISI EKOLOGI DAN PEMANFAATAN SUMBERDAYA MANGROVE DI DESA TAROHAN SELATAN KECAMATAN BEO SELATAN KABUPATEN KEPULAUAN TALAUD1 Rivay Ontorael2, Adnan S Wantasen3, Ari B Rondonuwu3 ABSTRACT This study aims to determine the ecological condition of mangrove forests, and the use/utilization of mangrove forests. The method used is method of survey and interview cruising. Ecological data retrieval is done by making transects kuadrant shaped by the size of 25x25 cm by 3 pieces lengthwise parallel to the coastline of South Tarohan Village. Respondents to the data carried by a purposive sampling interview respondents who have been determined. The results showed that the highest density is owned by Sonneratia alba and the highest frequency is owned by species Sonneratia Alba its index value is also important because it is owned by Sonneratia Alba. Sonneratia Alba is a type of mangrove, Sonneratia which have a dominant role in the mangrove forest ecosystem. Environmental conditions of coastal waters of South Tarohan village has a good environment and support the survival of mangrove forests and biota in the vicinity. South Tarohan Villagers were already aware of and understand the benefits of mangrove forests, it can not guarantee the preservation of mangrove forests because most people still use mangrove wood for household needs for fuel wood.   Keywords : Mangrove, ecological   ABSTRAK Penelitian ini bertujuan untuk mengetahui kondisi ekologi hutan mangrove, serta penggunaan/pemanfaatan hutan mangrove. Metode yang digunakan yaitu metode survey jelajah dan wawancara. Pengambilan data ekologi dilakukan dengan membuat transek berbentuk kuadrant dengan ukuran 25x25 m sebanyak 3 buah  memenjang sejajar garis pantai Desa Tarohan Selatan. Untuk data responden dilakukan dengan wawancara secara purposive sampling yaitu responden yang sudah ditentukan. Hasil penelitian menunjukan bahwa Kerapatan jenis tertinggi di miliki oleh Sonneratia alba dan Frekuensi Jenis tertinggi di miliki oleh Sonneratia alba beserta Indeks Nilai Penting juga di miliki oleh Sonneratia alba karena Sonneratia alba merupakan jenis mangrove yang memiliki peranan dominan dalam ekosisten hutan mangrove. Kondisi lingkungan perairan pesisir Desa Tarohan Selatan memiliki lingkungan yang baik dan mendukung kelangsungan hidup dari hutan mangrove dan biota yang ada di sekitarnya. Masyarakat Desa Tarohan Selatan ternyata sudah mengetahui dan memahami manfaat hutan mangrove, hal ini tidak dapat menjamin kelestarian hutan mangrove karena masih sebagian besar masyarakat menggunakan kayu bakau sebagai kebutuhan rumah tangga untuk kayubakar kayu bakar. Kata kunci : Mangrove, ekologi
Mapping of Mangrove Diversity in Kelurahan Tongkaina, Bunaken Sub-District, Manado Puasa, Rio N.; Wantasen, Adnan S.; Mandagi, Stephanus V.
Jurnal Ilmiah PLATAX Vol 6, No 1 (2018): ISSUE JANUARY-JUNE 2018
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jip.6.1.2018.19542

Abstract

This research was conducted in coastal area of Tongkaina Village, Bunaken Sub-district, Manado City, North Sulawesi Province. The purpose of this study was to calculate the diversity of mangrove plants and map the zoning of mangrove species distribution in three research sites. The data collected are categorized as primary and secondary data. Primary data collection related to biophysical condition of mangrove ecosystem, including vegetation structure and area of mangrove cover in study site and further analyzed. Secondary data were collected from various literature studies, documentation and scientific papers and related legislation. Based on  the obtained results, it was known that the diversity index of mangrove in Tongkaina is 1.71 which is categorized as medium in term of its diversity, because the value of H 'is greater than 1 and smaller than 3. This value means also that there was enough productivity, ecosystem condition is quite balanced, and moderate ecological pressures. The highest species diversity index was found in Sonneratia alba with an index of 0.37 and the lowest was in the Bruguiera gymnorrhiza species with index of 0.06. Mapping of mangrove species is done by taking coordinate points within quadrant at three research sites. Color degradation with rounded symbols are used to distinguish each species. The aims are designed to be able to easily distinguish between species visually and can be used as one method of mapping study on the diversity of mangroves. This study reveals the known levels of mangrove diversity are moderate. The existence of fishing activities and mooring boat by the local community contribute to mangrove land degradation. Indispensable protection or conservation through knowledge transfer and building awareness to the community, as well as providing an economic alternative for those utilizing mangrove for both household and commercial needs, in order to maintain better conditions are equally important.Keywords: Mapping, Mangrove, Diversity, TongkainaAbstrakPenelitian ini berlokasi di kawasan pesisir pantai Kelurahan Tongkaina, Kecamatan Bunaken Kota Manado Provinsi Sulawesi Utara. Tujuan dari penelitian ini yaitu untuk menghitung keanekaragaman hutan mangrove serta memetakan zonasi pembagian jenis mangrove di tiga stasiun penelitian. Data yang dikumpulkan adalah data primer dan data sekunder. Pengumpulan data primer berkaitan dengan kondisi biofisik ekosistem mangrove yaitu, struktur vegetasi dan luasan mangrove di daerah penelitian dan selanjutnya dianalisis. Kemudian data sekunder dikumpulkan dari berbagai kajian literature, dokumentasi dan tulisan-tulisan ilmiah serta peraturan perundang-undangan terkait. Pada hasil yang diperoleh diketahui nilai indeks keanekaragaman mangrove di Tongkaina adalah 1,71 dimana nilai indeks ini tergolong dalam kategori keanekaragaman sedang, karena nilai H’ lebih besar dari 1 dan lebih kecil dari 3, yang berarti produktivitas cukup, kondisi ekosistem cukup seimbang, dan tekanan ekologis sedang. Indeks Keanekaragaman spesies tertinggi didapati pada Sonneratia alba dengan nilai indeks 0,37 dan terendah ada pada spesies Bruguiera gymnorrhiza yang memiliki nilai indeks yaitu 0,06. Pemetaan jenis mangrove dilakukan dengan cara pengambilan titik koordinat pada kuadran di tiga stasiun penelitian. Degradasi warna dengan simbol bulat di pakai untuk membedakan tiap spesies. Hal ini bertujuan agar dapat dengan mudah membedakan antar spesies secara visual serta dapat dijadikan salah satu metode kajian untuk memetakan keanekaragaman mangrove. Diketahui tingkat keanekaragaman mangrove tergolong sedang. Adanya kegiatan pertambakan dan tambatan perahu masyarakat membuat lahan mangrove semakin berkurang. Sangat diperlukan adanya perlindungan atau pelestarian melalui pengetahuan dan penyadaran kepada masyarakat, serta memberikan alternatif ekonomi bagi yang memanfaatkan mangrove baik untuk kebutuhan rumah tangga ataupun komersial, demi menjaga perkembangan kondisi yang lebih baik.Kata kunci:      Pemetaan, Mangrove, Keanekaragaman, Tongkaina
Conditions of Substrate and Water Quality Supporting Activites as A Growth Factor in Mangrove at Coastal Basaan I, South East District Minahasa Adnan S. Wantasen
Jurnal Ilmiah PLATAX Vol. 1 No. 4 (2013): Edisi September - Desember 2013
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jip.1.4.2013.3704

Abstract

Mangrove forest vegetation contained in Basaan The village has an important role, both ecologically and economically for the community. The mangrove ecosystem's ability to maintain its ecological function depends on factors - environmental contributing factors, namely the quality of the environment and substrate conditions. The purpose of the study was to measure the quality of environmental factors and substrate waters around mangrove and describe the environmental capacity of water at mangrove ecosystem. The method of research by sampling at two locations: station A and station B by taking water samples in which the chemical and physical parameters of the test carried out in the Laboratory of Water archipelago and substrate samples which were tested in Laborarotium Soil Fertility, Faculty of Agriculture Unsrat Manado. The test results showed that the water temperature is 310C and TSS levels <1 (station A) and 44 (station B), pH 7.3; salinity 32; NH3 0.26 (A), 0.05 (B); PO4 0.122 (A ), 0.013 (B); H2S < 0.02; DO 10.10 (A), 8.95 (B). For the test results is the basic substrate pH H2O 7.6 (station A) and 7.5 (station B) neutral category; pH KCl 5.1 (A) and 5.4 (B) neutral category, N 0.44 (A ), 0.34 (B) medium category; P2O5 1.98 (A) and 15.35 (B) medium category; organic C-5.83 (A) and 3.98 (B) high category; K2O 2, 27 (A) and 23.48 (B) medium category. Conditions coastal waters village Basaan I still quite good because of the support and the dukungya still need attention orthoposphat parameter whose value is higher than the standard.   Keywords : water quality, substrate base, carrying capacity
The Antibacterial Activity Of Several Sponges From The Waters Of Tasik Ria Against Escherichia coli And Staphylococcus aureus bacteria Abrianto A. O. Rompis; Fitje Losung; Deiske A. Sumilat; Agung B. Windarto; Stenly Wullur; Laurentius T. X. Lalamentik
Jurnal Ilmiah PLATAX Vol. 7 No. 1 (2019): ISSUE JANUARY-JUNE 2019
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jip.7.1.2019.21435

Abstract

The sponge is one of the sea organisms that has a prospect as a source of natural compounds including peptides, steroids, asetogenin, terpenoids, alkaloids, cyclic halide and nitrogen. This research was directed to obtain several species of sponges from the waters of Tasik Ria as well as testing the antibacterial activity of extracts from some of the sponge against the bacteria Escherichia coli and Staphylococcus aureus. From the identification, seven species of sponges were found, which consists of: Amphimedon sp., Axinosa sp., Aaptos sp., Theonella sp., Cribochalina sp., Hyrtios sp., and Lendenfeldia sp. The tests of antibacterial activity of the extracts from these sponges against test bacteria E. coli and S. aureus showed some positive results. Extract from Axinosa sp. sponge(16 mm) showed the strongest antibacterial activity on Escherichia coli bacteria. Followed by Hyrtios sp. extract (13.5 mm), Aaptos sp. extract (13 mm), Lendenfeldia sp. extract (13 mm) and Cribochalinai sp. extract(10.5 mm). While the the tests on Staphylococcus aureus bacteria showed that the strongest antibacterial activity was found from Axinosa sp. sponge extract (16.5 mm), followed by the extract from Aaptos sp. (15 mm), Lendenfeldia sp. extract (14.5 mm), Hyrtios sp. extract(13.5 mm) and Cribochalina sp. extract (11 mm).Keywords: Sponge, antibacterial, Escherichia coli, Staphylococcus aureus ABSTRAK Spons merupakan salah satu biota laut yang sangat prospektif sebagai sumber senyawa bahan-bahan alami antara lain peptide, terpenoid, steroid, asetogenin, alkaloid, halide siklik dan senyawa nitrogen. Penelitian ini diarahkan untuk mendapatkan beberapa spesies spons dari perairan Tasik Ria serta menguji aktivitas antibakteri dari beberapa ekstrak spons terhadap bakteri Escherichia coli dan bakteri Staphylococcus aureus. Hasil identifikasi spons ditemukan sebanyak tujuh spesies yang terdiri dari: Amphimedon sp., Axinosa sp., Aaptos sp., Theonella sp., Hyrtios sp., Cribochalina sp. dan Lendenfeldia sp.. Aktivitas antibakteri dari beberapa ekstrak spons terhadap bakteri uji E. coli dan S. aureus terdapat diameter zona hambat bervariasi yaitu bakteri Escherichia coli menunjukkan aktivitas antibakteri ekstrak spons terkuat pada spons Axinosa sp (16 mm), disusul ekstrak spons Hyrtios sp. (13,5 mm), ekstrak spons Aaptos sp. (13 mm), ekstrak spons Lendenfeldia sp. (13 mm) dan ekstrak spons Cribochalinai sp. (10,5 mm).  Sedangkan pada bakteri Staphylococcus aureus menunjukkan aktivitas antibakteri ekstrak spons terkuat yaitu:  ekstrak spons Axinosa sp. (16,5 mm), disusul ekstrak spons Aaptos sp. (15 mm), ekstrak spons Lendenfeldia sp. (14,5 mm), ekstrak spons Hyrtios sp. (13,5 mm) dan ekstrak spons Cribochalina sp.(11mm).Kata Kunci : Spons, Antibakteri, Escherichia coli, Staphylococcus aureus
Community Structure of Seagrass in Coastal Waters of Bahoi Village, West Likupang Sub-district, North Minahasa Regency, North Sulawesi Province Tolule, Kurnia; Kambey, Alex D.; Rondonuwu, Ari B.
Jurnal Ilmiah PLATAX Vol 3, No 2 (2015): EDISI JULI - DESEMBER 2015
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jip.3.2.2015.13221

Abstract

This study was aimed at revealing the structure of seagrass community in the coastal waters of Bahoi Village, West Likupang Sub-district, District of North Minahasa, North Sulawesi Province. Samples collection was conducted during the lowest tide period by deploying line transect and quadrate. Eight species of seagrasses were identified on this study, including species as follow: Enhalus acoroides, Thalassia hempricihii, Cymodocea rotundata, C. serrulata, Syringodium isoetifolium, Hlodule pinifolia, H. uninervis and Halophila ovalis. The highest density value ( 112.16 individual/m2) was calculated from transect III data on S. isoetifolium species. In term of relative density value, S. isoetifolium also has the highest value (35.176 %). Index dominance (C) was calculated as well from transect III data (0.477) while the highest diversity index  (H’) was calculated from transect I data (1.724). Keyword : structure, Analysis, seagrass ABSTRAK Penelitian ini bertujuan mengkaji struktur komunitas lamun di perairan pantai Desa Bahoi Kecamatan Likupang Barat Sulawesi Utara.Pengambilan sampel  dilaksanakan sekali pada saat surut terendah, data dikumpulkan berdasarkan garis transek dan kuadrat. Jenis lamun yang ditemukan dalam keseluruhan kuadrat di lokasi penelitian berjumlah 8 spesies yaitu : Enhalus acoroides, Thalassia hemprichii, Cymodocea rotundata, Cymodocea serrulata, Syringodium isoetifolium, Halodule pinifolia, Halodule uninervis, dan Halophila ovalis. Kepadatan individu tertinggi terdapat pada transek III yaitu spesies Syringodium isoetifolium 112,16 ind/m2. Kepadatan relatif tertinggi terdapat pada spesies Syringodium isoetifolium (35,176 %). Indeks dominasi (C) yang tertinggi terdapat pada transek III 0.477 indeks keanekaragaman spesies (H’) yang tertinggi pada transek I 1.724. Keyword : structure, Analysis, seagrass 1Mahasiswa Program Studi MSP FPIK-UNSRAT 2Staf pengajar Fakultas Perikanan dan Ilmu Kelautan Universitas Sam Ratulangi
Nile Tilapia Oreochromis niloticus Culture Development Strategy In Floating Net Cage Of Galela Lake, North Halmahera Regency, North Mollucas Province Charlly N. Eteke; Hengky Sinjal; Edwin L. A. Ngangi; Suria Darwisito
Jurnal Ilmiah PLATAX Vol. 7 No. 2 (2019): ISSUE JULY - DECEMBER 2019
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jip.7.2.2019.26023

Abstract

This study aims to examine the development strategy of Nile tilapia (Oreochromis niloticus) culture in Galela Lake, North Halmahera Regency, North Mollucas Province. It is a descriptive study. Data collection used direct observations, interviews, and literature studies, and data analysis applied SWOT analysis, and continued with Quantitative Strategic Planning Matrix (QSPM)).  Results revealed that there were 6 priority strategies taken to develop the culture of the nile tilapia (O. niloticus) as follows: 1. Human resources development; 2. Take advantage of the investment-providing institutions for culture development; 3. Optimize the use of nile tilapia culture in the floating net cage; 4. Broaden the marketing access; 5. Increase the fish seed quality and the product quality; 6. Agreement among the fish farmers to maintain security in the floating net cage localities.Keywords: strategy, Galela Lake, nile tilapia, SWOT, QSPM. ABSTRAKPenelitian ini bertujuan untuk mengkaji strategi pengembangan budi daya ikan nila (Oreochromis niloticus) di Danau Galela Kabupaten Halmahera Utara Provinsi Maluku Utara. Penelitan ini merupakan penelitian deskriptif. Teknik pengembilan data melalui observasi langsung dan wawancara, dan studi literature. Analisis data menggunakan analisis SWOT. Dan dilanjutkan dengan uji OSPM  (Quantitative Strategis Planning Matrix).  Hasil dari analisis data menghasilkan enam strategi prioritas untuk pengembangan budi daya ikan nila (oreochromis niloticus) yaitu 1. Peningkatan pembinaan SDM 2. Memanfaatkan lembaga penyedia modal untuk pengembangan budi daya 3. Optimalisasi lahan budi daya ikan nila di karamba Jaring apung (KJA) 4. Memperluas akses pemasaran 5. Peningkatan kualitas benih ikan nila dan kualitas produk 6. Kesepakatan antar pembudidaya dalam menjaga keamanan di lokasi karamba jaring apung (KJA).Kata Kunci : Strategi, Danau Galela, Ikan Nila, Analisis SWOT, Analisis QSPM
A study on management of mangrove and the knowledge of local community in Bahoi of West Likupang Subdistrict of North Minahasa District Vonne Lumenta; Stephanus V. Mandagi; Markus T. Lasut
Jurnal Ilmiah PLATAX Vol. 5 No. 1 (2017): ISSUE JANUARY - JUNE 2017
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jip.5.1.2017.14970

Abstract

A study on community based mangrove management was conducted in Bahoi of North Minahasa District of North Sulawesi Province of Indonesia. This aims of the study were to examine the management of mangrove including community involvement in the whole processes as well as the institutional settings; to examine knowledge and atitute of the community of Bahoi toward the management processes; to find out its impacts to the community and marine ecosystems.   Methods used in this study were interviews and surveys. For the former, all key persons involving in the management including representative of government were interviewed. With the latter, 30 community members or around 10% of total population were randomly selected and requested to fill in questionnaries containing multiple choices questions to meet the objectives of the study. This study revealed that the management of mangrove has been projects driven activities since year 2000. Yet communities were partly involved in the management including during the establishment of organization and village Ordinance, the survey shows that only 30% of respondents actively involved. That is why 63% of respondent argue that the management processes is lacking and 23% recon that it should be improved. Moreover, 100% of respondents claim that they strongly support conservation of mangrove and other coastal resources; 90% of the respondent answer that cultural background (Sangiran ethnicity) drives their attitude about preserving the coastal resources. In terms of implication of the management mangrove and other coastal resources in Bahoi, they argue that it has resulted in improvement of income and a healthy mangrove ecosystem. Keywords: Mangrove, Management, Bahoi     Abstract Penelitian ini tentang pengelolaan mangrove berbasis masyarakat telah dilakukan di Desa Bahoi di Kabupaten Minahasa Utara Propinsi Sulawesi Utara Indonesia. Tujuan penelitian ini untuk mengetahui proses dan dinamika pengelolaan mangrove berbasis masyarakat khususnya tentang keterlibatan masyarakat dan faktor-faktor yang mempengaruhi pengelolaan terutama pengetahuan dan sikap masyarakat, serta dampak pengelolaan terhadap masyarakat dan ekosistem pesisir lainnya. Teknik pengumpulan data yang digunakan adalah wawancara (interview) dan survei. Wawanara telah dilakukan terhadap semua tokoh kunci yang terlibat dan mempengaruhi pengelolaan, sedangkan untuk survei dengan menggunakan kuisioner, sejumlah 30 responden atau sekitar 10% dari jumlah penduduk telah dipilih secara random bersedia memberikan jawaban atas pertanyaan-pertanyaan pilihan berganda (multiple choises). Penelitian ini mengdapatkan bahwa pengelolaan mangrove di Desa Bahoi didorong oleh proyek pemerintah sejak tahun 2000. Namun masyarakat belum seluruhnya dalam proses pengelolaan mangrove termasuk dalam pembuatan lembaga dan Peraturan Desa tentang pengelolaan sumberdaya pesisir. Makanya 63% responden mengakui kalau pengelolaan yang ada kurang baik dan 23 % menyarankan perlu perbaikan. Selanjutnya 100% menyatakan mendukung sepenuhnya usaha konservasi mangrove dan sumberdaya pesisir lain. 90 % dari mereka percaya bahwa factor budaya Sangir yang mendorong sikap mereka untuk menjaga lingkungan pesisir. Mengenai dampak pengelolaan ekosistem mangrove, masyarakat dan pemerintah menjawab bahwa telah membantu meningkatkan pendapatan atau ekonomi masyarakat dan ekosistem mangrove semakin sehat. Kata kunci: Mangrove, Managemen, Bahoi
Dissolved Oxygen and Apparent Oxygen Utilization in Lembeh Strait Waters, North Sulawesi Patty, Simon I
Jurnal Ilmiah PLATAX Vol 6, No 1 (2018): EDISI JANUARI-JUNI 2018
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jip.6.1.2018.17972

Abstract

The observation of dissolved oxygen level and Apparent Oxygen Utilization (AOU) in Lembeh Strait Waters was conducted in January, February, June and July 2016. The objective of this research is to know the condition of dissolved oxygen and Apparent Oxygen Utilization (AOU). The results of the analysis showed that dissolved oxygen levels in the surface layer and near the bottom ranged from 6.00-6.56 mg/l and 5.59-6.17 mg/l. Based on the values of temperature and salinity obtained from this study, solubility, oxygen saturation degree and AOU value at the surface layer were calculated. In the surface layer the AOU values are positive, ranging from 0.10-0.72 mg/l, while near the bottom, negative and positive AOU values were balanced, ranging from -0.23-0.42 mg/l. The concentration of dissolved oxygen in the Lembeh Strait waters has not shown negative impact on the aquatic environment and is still in accordance with sea water quality standards for marine biota.Keywords: Dissolved oxygen, apparent oxygen utilization (AOU), Lembeh Strait. ABSTRAK         Pengamatan kadar oksigen terlarut dan Apparent Oxygen Utilization (AOU) di Perairan Selat Lembeh dilaksanakan pada bulan Januari, Februari, Juni dan Juli 2016. Penelitian ini bertujuan untuk mengetahui kondisi oksigen terlarut dan Apparent Oxygen Utilization (AOU). Hasil analisa menunjukkan bahwa kadar oksigen terlarut di lapisan permukaan dan dekat dasar berkisar antara 6,00-6,56 mg/l dan 5,59-6,17 mg/l. Berdasarkan nilai suhu dan salinitas yang diperoleh dari penelitian ini telah dihitung daya larut, derajat kejenuhan oksigen dan nilai AOU pada lapisan permukaan. Di lapisan permukaan nilai AOU semuanya positip berkisar antara 0,10-0,72 mg/l dan di dekat dasar nilai AOU negatip dan positip berimbang, berkisar antara       -0,23-0,42 mg/l. Konsentrasi oksigen terlarut di perairan Selat Lembeh belum menunjukkan dampak negatip terhadap lingkungan perairan dan masih sesuai dengan baku mutu air laut untuk biota laut. Kata Kunci: Oksigen terlarut, apparent oxygen utilization (AOU), Selat Lembeh.
The use of fish silage in different composition for the growth of carp Cyprinus carpio L. Julio David; Sartje Lantu; Henneke Pangkey; Lawrence J.L. Lumingas; Jeffrie F. Mokolensang; Juliaan Ch. Watung
Jurnal Ilmiah PLATAX Vol. 7 No. 2 (2019): ISSUE JULY - DECEMBER 2019
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jip.7.2.2019.23725

Abstract

This study aims to examine the fish silage for total gain weight, growth rate, and the specific growth rate of common carp (Cyprinus carpio L.), which is cultivated in 12 nets (1x0,5x1m), with the density of 10 fish (3-5 cm) on each net. The experimental design used was a completely randomized design (CRD) with 4 treatments and 3 replications; treatment A with 10% fish silage, treatment B with fish silage 20%, treatment C with 30% fish silage and treatment D were commercial pellet. The ANOVA test showed that the treatment effect among feed A, B, C, and D tested did not give a significant difference to total gain weight, growth rate and the specific growth of carp fry.Keyword: common carp, fish silage, fish feed, growth ABSTRAKPenelitian ini bertujuan untuk menelaah pemberian silase ikan bagi pertumbuhan mutlak, pertumbuhan nisbi, dan pertumbuhan harian ikan mas (Cyprinus carpio L.), yang dipelihara dalam petak-petak jaring berukuran 1x 0,5 x 1 m, dengan padat penebaran 10 ekor ikan berukuran  3-5 cm. Rancangan percobaan yang digunakan adalah rancangan acak lengkap (RAL) dengan 4 perlakuan dan 3 ulangan; perlakuan A pelet berkomposisi silase ikan 10%, perlakuan B pelet berkomposisi silase ikan 20 %, perlakuan C pelet berkomposisi silase ikan 30 % dan perlakuan D adalah pelet komersil. Uji ANOVA menunjukkan bahwa pengaruh perlakuan di antara pakan A, B, C, dan D yang diujicobakan tidak memberikan perbedaan yang nyata terhadap pertumbuhan mutlak, pertumbuhan nisbi dan pertumbuhan harian benih ikan mas.Kata kunci : ikan mas, silase ikan, pakan ikan, pertumbuhan
STRUKTUR KOMUNITAS TERIPANG (HOLOTHUROIDEA) DI KAWASAN PANTAI DESA ONDONG KECAMATAN SIAU BARAT KABUPATEN SIAU TAGULANDANG BIARO1 Syafludin Lagio; Lawrence J.L. Lumingas; Gaspar D. Manu
Jurnal Ilmiah PLATAX Vol. 2 No. 3 (2014): EDISI SEPTEMBER-DESEMBER 2014
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jip.2.3.2014.9122

Abstract

Sea cucumbers is a group of marine invertebrates belonging to class  holothuroidea. At this time, the hunting for sea cucumber is not just targetted on the expensive species, but also the cheap one. The exploitation pressure has caused population decline which  can cause changes in their community structure. This research was aimed to understand the types of sea cucumber, analyze the structure of the community sea cucumber which includes the density of individuals, diversity index, the dominance index, interspecific  and the dispersion pattern. Sample collection was done at night at the lowest tide in December, 2013. Based on the research activities in the coastal areas of Ondong, west Siau district, Siau-Tagulandang-Biaro regency, 7 species of holothuroidea were found : Holothuria atra, Holothuria leucospilota, Actinopyga echinites, Actinopyga lecanora, Bohadschia argus, Bohadschia marmorata and bohadschia vitiensis, respectively with mean individual density of 0.797 ind/m2, diversity index (H’ = 1.718), equity index or harmony (e = 0. 883), dominance index (C = 0.218), interspecific association between 7 species forming 5 pairs of positive associations and 16 pairs of negative association andrandomdistribution. Keywords : Structure communities, sea cucumber, Ondong, Sitaro   ABSTRAK Teripangadalah sekelompokinvertebrata lautyang termasuk dalam kelasHolothuroidea. Pada saat ini, perburuanuntukteripangtidak hanyaditargetkanpada spesiesmahal, tetapi jugayang murah. Tekananeksploitasitelah menyebabkanpenurunan populasiyang dapat menyebabkanperubahan pada strukturkomunitasnya. Penelitian inibertujuan untukmemahami jenisteripang, menganalisisstrukturteripangyang meliputikepadatanindividu, indeks keanekaragaman, indeksdominasi, asosiasi antar spesies danpola penyebaran. Pengambilan sampeldilakukanpada malam harisaat surut terendahpada bulan Desember2013.Berdasarkankegiatan penelitiandiwilayah pesisirOndong, kecamatan SiaubaratKabupatenSiau-Tagulandang-Biaro, ditemukan 7spesiesteripang : Holothuriaatra, Holothurialeucospilota, Actinopygaechinites, Actinopygalecanora, Bohadschiaargus, Bohadschiamarmoratadanbohadschiavitiensis,masing-masing dengankepadatan individurata-rata0.797ind/m, indeks keanekaragaman(H' = 1.718), indekskemerataan atau keserasian(e = 0.883), indeksdominansi(C = 0.218), asosiasiantar 7spesiesmembentuk5pasangasosiasipositif dan16pasangasosiasinegatif danpenyebaran acak.   Kata kunci : Struktur komunitas, teripang, Ondong, Sitaro   1Bagian dari skripsi 2Mahasiswa Program Studi Manajemen Sumberdaya Perairan FPIK-UNSRAT 3Staf pengajar Fakultas Perikanan dan Ilmu Kelautan Universitas Sam Ratulangi

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