https://ejournal.unsrat.ac.id/v3/index.php/jplt/issue/feed JURNAL PESISIR DAN LAUT TROPIS 2024-04-06T18:20:40+08:00 Dr. Erly Kaligis, S.Pi., M.Si jplt@unsrat.ac.id Open Journal Systems <p>The Coastal and Tropical Marine Journal accommodates scientific studies in the fields of coastal and marine bio-ecology, hydro-oceanography and coastal morphology, toxicology and pharmaceuticals, studies of biota chemical substances, and other marine biotechnology developments in coastal and marine coverage in tropical areas. Scientific studies can be in the form of research results or critical reviews. This journal is published 3 (three) times a year (February, June, October).</p> <p> </p> <p>Sinta, Garuda, and Google Scholar have indexed the Tropical Coastal and Marine Journal.</p> <p>Credited Tropical Coastal and Marine Journal Ranked 5 (Sinta 5) for 2018-2023, based on the Decree of the Ministry of Research, Technology and Higher Education Number: 28/E/KPT/2019 (26 September 2019).</p> https://ejournal.unsrat.ac.id/v3/index.php/jplt/article/view/55069 KONDISI TERUMBU KARANG dI PERAIRAN DESA WORI KABUPATEN MINAHASA UTARA, SULAWESI UTARA 2024-04-06T17:38:23+08:00 Kristofel Ramo Poli’i kristofelpolii053@student.unsrat.ac.id Chatrien A.L. Sinjal kristofelpolii053@student.unsrat.ac.id Erly Y. Kaligis kristofelpolii053@student.unsrat.ac.id Frans Lumuindong kristofelpolii053@student.unsrat.ac.id N. Gustaf F. Mamangkey kristofelpolii053@student.unsrat.ac.id Kakaskasen A. Roeroe kristofelpolii053@student.unsrat.ac.id <p>Coral reefs are a unique ecosystem of tropical regions that are highly complex, productive, and possess a high biodiversity, serving as habitats for organisms. Essentially, coral reefs are massive deposits of calcium carbonate (CaCO3) produced by reef-building coral organisms (hermatypic corals) from the phylum Cnidaria, class Anthozoa, order Scleractinia. This study aims to assess the condition of coral reefs in the waters of Wori Village to accurately understand the status and dynamics that will determine the direction and policies regarding coral reefs in Wori Village waters. The results of the Coral Reef Condition Study in the Waters of Wori Village using the Underwater Photo Transect method revealed that at Station I, the percentage of live coral cover was 53.47% out of 12 forms of coral growth, while at Station II, the percentage of live coral cover was 47.73% out of 10 forms of coral growth, with the genus Porites being the most dominant at both observation stations. The average coral cover value in the waters of Wori Village was 50.60% based on the Standard Criteria for Coral Damage Assessment in Ministerial Regulation No. 4 of 2001. The condition of the reefs in Wori Village Beach falls under the Good category</p> <p><strong>Keywords</strong>: Wori Waters, Coral Reefs, UPT, CPCE</p> <p>&nbsp;</p> <p><strong>ABSTRAK</strong></p> <p>Terumbu karang adalah suatu ekosistem khas daerah tropis yang sangat kompleks produktif serta memiliki keanekaragman biota yang sangat tinggi dan juga merupakan habitat bagi organisme. Pada dasarnya terumbu karang merupakan endapan masif kalsium karbonat (CaCo3) yang dihasilkan oleh organsime karang pembentuk terumbu (karang hermatipik) dari filum Cnidaria, kelas anthozoa ordo Scleractinia. Penelitian ini bertujuan untuk melihat kondisi terumbu karang yang ada di Perairan Desa Wori guna mengetahui kondisi terumbu karang di Desa Wori secara akurat dan detail mengenai status dan dinamika yang akan menentuhkan arah dan kebijakan terumbu karang di Perairan Desa Wori. Hasil Penelitian Kondisi Terumbu Karang di Perairan Desa Wori dengan Mengunakan metode Underwater Photo Transek di Ketahui pada Stasiun I Persentase tutupan karang hidup 53,47% dari 12 bentuk pertumbuhan karang sedangkan pada Stasiun II persentase karang hidup 47,73% dari 10 bentuk Pertumbuhan karang dengan genus karang Porites yang paling dominan di dua Stasiun Pengamatan dengan nilai rata-rata nilai tutupan karang di Perairan Desa Wori 50,60% berdasarkan Kriteria Baku Penilaian kerusakan terumbu dalam KepMen. 2001 No.4. kondisi terumbu di Pantai Desa Wori Masuk dalam Kategori Baik.</p> <p><strong>Kata kunci: </strong>Perairan Wori, Terumbu Karang, UPT, CPCE</p> 2024-02-02T00:00:00+08:00 Copyright (c) 2024 https://ejournal.unsrat.ac.id/v3/index.php/jplt/article/view/55071 ANALISIS PERTUMBUHAN DAUN Thalassia hemprichii DI PERAIRAN SEKITAR DESA TULUSAN KECAMATAN TAGULANDANG KABUPATEN SIAU TAGULANDANG BIARO 2024-04-06T18:05:17+08:00 Steven Medellu calvyn_sondak@unsrat.ac.id Calvyn F.A. Sondak calvyn_sondak@unsrat.ac.id Erly Y. Kaligis calvyn_sondak@unsrat.ac.id Frans Lumuindong calvyn_sondak@unsrat.ac.id Agung B. Windarto calvyn_sondak@unsrat.ac.id Veibe Warouw calvyn_sondak@unsrat.ac.id <p>Seagrass is a flowering plant that can grow well in shallow marine environments. All seagrasses are one-seed plants that have roots, rhizomes, leaves, flowers and fruit just like plants on land. This research was carried out from August to September 2023 in the nearby waters of Tulusan Village, Tagulandang District, Sitaro Islands Regency. This research aims was to determine the growth rate of <em>Thalassia hemprichii</em> leaves on two different substrate types. Analysis of seagrass growth rate was measured using the seagrass leaf growth rate test, normality test and independent T-test. The results of this research showed that the average growth rate of young leaves was 0.29 cm/day and old leaves 0.15 cm/day on the sandy substrate, while on the mixed sand substrate and dead coral fragments, young leaves were 0.24 cm/day and old leaves 0.09 cm/day with a measurement interval of 7 days. The results of the normality test using the Liliefors formula for seagrass data show that it has a normal distribution. The results of the independent T-test on mixed sandy substrate and coral fragments showed that there were significant differences in seagrass leaf growth. The results of parameter measurements on sandy substrates ranged in temperature from 30˚C - 37˚C, salinity 30 ppt - 31 ppt, pH 8 and on coral rubble sand substrates ranged from 30˚C - 35 ˚C salinity 30 - 32 ppt, pH 8.</p> <p><strong>Keywords</strong>: Seagrass, Substrate, Growth</p> <p>&nbsp;</p> <p><strong>ABSTRAK</strong></p> <p>Lamun adalah tumbuhan berbunga yang dapat tumbuh dengan baik dalam lingkungan laut dangkal. Semua lamun adalah tumbuhan berbiji satu yang mempunyai akar, rimpang, daun, bunga dan buah seperti halnya dengan tumbuhan yang ada didarat. Penelitian ini dilaksanakan pada bulan Agustus - September 2023 di perairan sekitar Desa Tulusan Kecamatan Tagulandang Kabupaten Kepulauan Sitaro. Penelitian ini bertujuan untuk mengetahui laju pertumbuhan daun lamun <em>Thalassia hemprichii</em> pada dua tipe substrat berbeda. Analisis laju pertumbuhan lamun diukur menggunakan uji laju pertumbuhan daun lamun, uji normalitas dan uji T independen. Hasil penelitian ini diperoleh rata-rata laju pertumbuhan daun muda yaitu 0,29 cm/hari dan daun tua 0,15 cm/hari pada tipe substrat berpasir, sedangkan pada tipe substrat pasir pecahan karang mati, daun muda 0,24 cm/hari dan daun tua 0,09 cm/hari dengan interval pengukuran 7 hari. Hasil uji normalitas dengan menggunakan rumus liliefors data lamun menunjukan mempunyai sebaran normal. Hasil uji t independen pada tipe substrat berpasir dan pecahan karang menunjukan ada perbedaan nyata pertumbuhan daun lamun. Hasil pengukuran parameter pada substrat berpasir berkisar suhu 30˚C - 37˚C, salinitas 30 ppt – 31 ppt, pH 8 dan pada substrat pasir pecahan karang berkisar suhu 30˚C -35 ˚C salinitas 30 – 32 ppt, pH 8..</p> <p><strong>Kata Kunci</strong>: Lamun, Substrat, Pertumbuhan</p> 2024-02-03T00:00:00+08:00 Copyright (c) 2024 https://ejournal.unsrat.ac.id/v3/index.php/jplt/article/view/55072 PROFIL PERTUMBUHAN MIKROALGA Chlorella vulgaris PADA MEDIA KW21 2024-04-06T18:20:40+08:00 Stefano Juliander Suwarsono kurnikemer@unsrat.ac.id Kurniati Kemer kurnikemer@unsrat.ac.id Antonius Rumengan kurnikemer@unsrat.ac.id Hermanto Manengkey kurnikemer@unsrat.ac.id Natalie Rumampuk kurnikemer@unsrat.ac.id Jane Mamuaja kurnikemer@unsrat.ac.id <p>Microalgae are microscopic organisms found in both freshwater and seawater. These organisms lack roots, stems, and leaves but are capable of performing photosynthesis to produce their own food. One type of microalga is <em>Chlorella vulgaris</em>, which belongs to the class Chlorophyceae. <em>Chlorella Vulgaris</em> can be cultivated as a natural feed for fish, clams, and shrimp. The aim of this research is to analyze the growth profile of <em>Chlorella vulgaris</em> cultivated in Kw21 media. Observations were conducted by counting the cell density of <em>C. vulgaris</em> from the adaptation phase to the death phase in three identical sample containers. This observation process was carried out daily at the same time and repeated three times. The cell density of <em>Chlorella vulgaris</em> in the exponential phase on the 11th day for sample A was 114.6 x 10⁴cells/ml, for sample B on the 10th day was 118.6 x 10⁴ cells/ml, and for sample C on the 7th day was 116.3 x 10⁴ cells/ml.</p> <p><strong>Keywords</strong>: Growth, <em>Chlorella vulgaris</em>, Microalgae, KW21 Media</p> <p>&nbsp;</p> <p><em>&nbsp;</em><strong>ABSTRAK</strong></p> <p>Mikroalga adalah organisme mikroskopis yang ditemukan di air tawar maupun air laut. Mikroalga ini tidak memiliki akar, batang dan daun. Namun mampu melakukan proses fotosintesis untuk menghasilkan makanan sendiri. Salah satu jenis mikroalga adalah <em>Chlorella vulgaris</em> yang tergolong dalam kelas Chlorophyceae. Mikroalga ini, dapat dibudidayakan sebagai pakan alami pada ikan, kerang dan udang. &nbsp;Tujuan penelitian ini adalah menganalisis profil pertumbuhan mikroalga <em>Chlorella vulgaris</em> yang dikultivasi dalam media Kw21. Pengamatan dilakukan dengan menghitung jumlah kepadatan sel mikroalga <em>C. vulgaris</em> mulai dari fase adaptasi sampai fase kematian dari 3 wadah sampel yang sama. Proses pengamatan ini dilakukan setiap hari di jam yang sama dan dengan tiga kali pengulangan. Jumlah kepadatan sel mikroalga C. vulgaris pada fase eksponensial di hari ke-11 pada sampel A yaitu 114,6 x10⁴sel/ml pada sampel B di hari ke-10 yaitu 118,6 x10⁴sel/ml, dan pada sampel C di hari ke-7 yaitu 116,3 x10⁴sel/ml.</p> <p><strong>Kata Kunci</strong>: Pertumbuhan, <em>Chlorella vulgaris</em>, Mikroalga, Media KW21</p> 2024-02-04T00:00:00+08:00 Copyright (c) 2024