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Journal : JURNAL ILMIAH PLATAX

Morphometric and Meristic Yellowstrip Scad Selaroides leptolepis (Cuvier, 1833) Landed at TPI Tumumpa and PPI Kema Fajar Vafry; Manginsela, Fransine B.; Wantasen, Adnan S.; Mandagi, Stephanus V.; Tilaar, Ferdinand F.; Rimper, Joice R.T.S.L
Jurnal Ilmiah Platax Vol. 11 No. 1 (2023): ISSUE JANUARY-JUNE 2023
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jip.v11i1.44335

Abstract

This research about morphometric and meristic character of yellow stripscad. Fish samples were selected from various sizes in order to represent the various sizes of yellow stripscad that existin nature. Samples of yellow stripscad were taken from fish landed at TPI Tumumpa as many as 60 tail and PPI Kema as many as 60 tail. The purpose of this study was to determine how the morphometric and meristic character of yellow stripscad landed in TPI Tumumpa and PPI Kema. Data analysis with K-mean cluster method using SPSS 25 and Ms. Excel 2019. Yellow stripscad landed in TPI Tumumpa and PPI Kema have different morphometric character with percentage difference of 95%. For meristic character have a fairly small lavel of difference with a difference of 29%. Keywords : yellow stripscad, morphometric, meristic, TPI Tumumpa, PPI Kema. Abstrak Penelitian ini mengenai karakter morfometrik dan meristik ikan selar kuning. Penelitian ini menggunakan metode deskriptif kuantitatif. Sampel ikan akan dipilih dari berbagai macam ukuran agar dapat mewakili berbagai macam ukuran ikan selar kuning yang ada di alam. Sampel ikan selar kuning diambil dari ikan yang didaratkan di TPI Tumumpa sebanyak 60 ekor dan di PPI Kema sebanyak 60 ekor. Tujuan dari penelitian ini untuk mengetahui bagaimana karakter morfometrik dan meristik ikan selar kuning yang didaratkan di TPI Tumumpa dan PPI Kema. Analisis data dengan metode K-mean cluster menggunakan program SPSS 25 dan Ms. Excel 2019. Ikan selar kuning yang didaratkan di TPI Tumumpa dan PPI Kema memiliki karakter morfometrik yang berbeda dengan persentase perbedaan sebesar 95%. Untuk  karakter meristiknya memiliki tingkat perbedaan yang cukup kecil dengan tingkat perbedaan sebesar 29%.  Kata- kata kunci : ikan selar kuning, morfometrik, meristik, TPI  Tumumpa, PPI Kema.  
Phytoplankton Community Structure in Seagrass Beds in Tiwoho Village, North Minahasa Regency Rimper, Abraham M.; Warouw, Veibe; Rimper, Joice R.T.S.L; Lintang, Rosita A.J.; Ompi, Medy; Pangkey, Henneke D.
Jurnal Ilmiah Platax Vol. 11 No. 1 (2023): ISSUE JANUARY-JUNE 2023
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jip.v11i1.45232

Abstract

This research was carried out from May to July 2022. A sampling at the study site included seawater for the needs of plankton identification as well as the measurement of water nitrate & phosphate levels and measurement of physical and chemical parameters such as temperature, pH, salinity and dissolved oxygen which were carried out on an ongoing basis In situ (in the field). The technique for determining plankton sampling was carried out purposively, namely with certain considerations to obtain samples that represent the research location area. Plankton sampling was carried out horizontally using a plankton net. Sample bottles containing seawater were identified at the Marine Biology Laboratory, Faculty of Fisheries and Marine Sciences. The composition of the phytoplankton found in the Tiwoho seagrass bed ecosystem consists of three classes, namely the Bacillariophyceae, Dynophyceae, and Cyanophyceae classes, with 28 genera. The results of chopped phytoplankton are expressed in Cells/l. The qualitative determination of plankton is made up to the genus level. The composition of the phytoplankton found in the Tiwoho seagrass bed ecosystem consists of three classes, namely the Bacillariophyceae, Dynophyceae, and Cyanophyceae classes, with 28 genera. The results of calculating the abundance of phytoplankton in the Tiwoho seagrass ecosystem are in the range of 29 - 66 cells/l. The highest abundance was found at station two, namely 66 cells/l with 21 genera, then station three (65 cells/l) with 24 genera, and station one (29 cells/l) with a total of 23 genera. The diversity index of seagrass beds in Tiwoho waters is in the range of 1.9330 - 2.4083, which means that community stability is categorized as moderate. The uniformity index is in the range of 0.4614 - 0.7154, this means that the uniformity between species is relatively the same, or the difference is not striking. While the domination index is in the range of 0.1494 - 0.2404, it means that the condition of the community structure is stable, and there is no ecological pressure (stress) on biota. Keywords: Phytoplankton, Biological Index, Abundance, Environmental parameters Abstrak Penelitian ini dilaksanakan pada bulan Mei sampai bulan Juli 2022. Pengambilan sampel di lokasi penelitian meliputi air laut untuk kebutuhan identifikasi fitoplankton dan pengukuran kadar nitrat, fosfat perairan serta pengukuran parameter fisika kimia seperti suhu, pH, salinitas dan oksigen terlarut yang dilakukan secara In situ (di lapangan). Teknik penentuan pengambilan sampel plankton dilakukan secara purposif yaitu dengan pertimbangan tertentu untuk mendapatkan sampel yang mewakili area lokasi penelitian. Pengambilan sampel plankton dilakukan secara horisontal dengan menggunakan plankton net. Sampel plankton diberi pengawet formalin 4% dan diidentifikasi di laboratorium Biologi Kelautan Fakultas Perikanan dan Ilmu Kelautan. Komposisi fitoplankton yang dijumpai di ekosistem padang lamun Perairan Tiwoho terdiri dari tiga kelas yaitu kelas Bacillariophyceae, Dynophyceae, dan Cyanophyceae, dengan 28 genera. Hasil perhitungan kelimpahan fitoplankton di ekosistem padang lamun Perairan Tiwoho berada di kisaran 29 - 66 sel/l. Kelimpahan tertinggi ditemukan di stasiun dua (depan kampung) yaitu 66 sel/l dengan 21 genera, kemudian stasiun tiga (depan dermaga) yaitu 65 sel/l dengan 24 genera, dan stasiun satu (ujung kampung) sebanyak 29 sel/l dengan jumlah 23 genera. Indeks keanekaragaman ekosistem padang lamun Perairan Tiwoho berada pada kisaran 1,9330 - 2,4083, yang berarti stabilitas komunitas dikategorikan sedang. Indeks keseragaman yaitu pada kisaran 0,4614 - 0,7154, ini berarti keseragaman antar spesies relatif sama, atau perbedaannya tidak menyolok. Sedangkan indeks dominasi yaitu pada kisaran 0,1494 - 0,2404, berarti kondisi struktur komunitas dalam keadaan stabil, dan tidak terjadi tekanan ekologi (stress) terhadap biota. Kata kunci: Fitoplankton, Indeks Biologi, Kelimpahan, Parameter lingkungan
Zooplankton in the Seagrass Beds of Nain Island Tuliabu, Nelda; Rimper, Joice R.T.S.L; Warouw, Veibe; Kaligis, Erly Yosef; Rumampuk, Natalie Detty C; Ngangi, Edwin Leonardo Apolonio
Jurnal Ilmiah Platax Vol. 12 No. 1 (2024): ISSUE JANUARY-JUNE 2024
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jip.v12i1.50187

Abstract

This research was conducted in July 2022, the determination of sampling locations was carried out by purposive sampling, namely data collection with certain considerations to obtain samples that represent the research location area. Seawater samples were taken using a plankton net which was then used for the zooplankton identification process carried out in the Marine Biology Laboratory of the Faculty of Fisheries and Marine Science. Measurement of physical parameters of water chemistry consisting of temperature, salinity, and pH, was carried out in situ. The content of nitrate and phosphate was conducted at the WLN laboratory (Water Laboratory Nusantara-WLN). Zooplankton counts were expressed in ind/l. Qualitative determination of plankton was made up to the genus level. The results of zooplankton identification consisted of 5 genera namely Acartia, Cyclops, Euterpina, Nauplius, and Oithona. The calculation of zooplankton abundance is in the range of 3-5 ind/l. The highest abundance was found at station one which was 5 ind/l followed by station three which was 4 ind/l and then station two as much as 3 ind/l. The diversity index is in the range of 0.4740-0.7786, the uniformity index is in the range of 0.2945-0.7087, and the dominance index ranges from 0.5971-0.7744. Keywords: Zooplankton, Seagrass Meadow, Nain Island, Abundance, Biological Index. Abstrak Penelitian ini dilaksanakan pada bulan Juli 2022, penentuan lokasi pengambilan sampel dilakukan dengan cara purposive sampling yaitu pengumpulan data dengan pertimbangan tertentu untuk memperoleh sampel yang mewakili wilayah lokasi penelitian. Sampel air laut diambil dengan menggunakan plankton net yang selanjutnya digunakan untuk proses identifikasi zooplankton yang dilakukan di Laboratorium Biologi Kelautan Fakultas Perikanan dan Ilmu Kelautan. Pengukuran parameter fisik kimia air yang terdiri dari suhu, salinitas, pH, dilakukan secara in situ. Kadar nitrat dan fosfat dilakukan di laboratorium WLN (Laboratorium Air Nusantara-WLN). Jumlah Zooplankton dinyatakan dalam ind/l. Penentuan plankton secara kualitatif dilakukan sampai tingkat genus. Hasil identifikasi zooplankton terdiri dari 5 genus yaitu Acartia, Cyclops, Euterpina, Nauplius, dan Oithona. Perhitungan kelimpahan zooplankton berada pada kisaran 3-5 ind/l. Kelimpahan tertinggi terdapat pada stasiun satu sebesar 5 ind/l, disusul stasiun tiga sebesar 4 ind/l dan kemudian stasiun dua sebanyak 3 ind/l. Indeks keanekaragaman berada pada rentang 0,4740-0,7786, indeks keseragaman berada pada rentang 0,2945-0,7087, sedangkan indeks dominasi berkisar antara 0,5971-0,7744. Kata Kunci: Zooplankton, Padang Lamun, Pulau Nain, Kelimpahan, Indeks Biologi.
Analysis Of The Effect Of El Niño La Nina And Sea Level Temperatures On Chlorophyll-A Concentrations In The Waters Of The Maluku Sea: Pesoth, Christianto; Rimper, Joice R.T.S.L; Warouw, Veibe; Mantiri, Rose O. S. E.; Sumilat, Deiske Adeliene
Jurnal Ilmiah Platax Vol. 12 No. 1 (2024): ISSUE JANUARY-JUNE 2024
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jip.v12i1.52236

Abstract

Global weather phenomena cannot be separated from the interaction between the ocean and the atmosphere. El Nino and La Nina are phenomena that were related to the interaction of the sea and the atmosphere which affects many aspects, including the fertility of waters. Indicators of the fertility of water could be determined from the distribution of sea surface temperature and chlorophyll-a concentration. This study aims to analyze variations in the distribution of sea surface temperature and chlorophyll-a in the Maluku Sea when the El Nino and La Nina phenomena are activated. The results showed that when the El Nino phenomenon was activated, there was a decrease in sea surface temperature and an increase in the concentration of chlorophyll-a from normal conditions. Besides, when the La Nina phenomenon was activated, there was an increase in sea surface temperature and a decrease in the concentration of chlorophyll-a from normal conditions. Spatial interpretation when El Nino and La Nina are activated showed low values with a distribution indicating the mixed proceed for the sea surface temperature parameter and showed higher values with an even distribution for the chlorophyll-a parameter. Keywords: Sea Surface Temperature, Chlorophyll-a, El Nino, La Nina. Abstrak Fenomena cuaca secara global tidak bisa lepas kaitannya dengan interaksi antara laut dan atmosfer. El Nino dan La Nina merupakan salah satu fenomena yang berkaitan dengan interaksi laut dan atmosfer yang berpengaruh terhadap banyak aspek termasuk kesuburan suatu perairan. Indikator kesuburan suatu perairan dapat ditentukan dari distribusi suhu permukaan laut dan konsentrasi klorofil-a. Penelitian ini bertujuan untuk menganalisa variasi distribusi suhu permukaan laut dan klorofil-a di perairan Laut Maluku saat fenomena El Nino dan La Nina aktif. Hasil penelitian menunjukkan bahwa saat fenomena El Nino aktif terjadi penurunan suhu permukaan laut dan peningkatan konsentrasi klorofil-a dari kondisi normal. Sebaliknya saat fenomena La Nina aktif terjadi peningkatan suhu permukaan laut dan penurunan konsentrasi klorofil-a dari kondisi normal. Interpretasi spasial saat El Nino dan La Nina aktif menunjukkan nilai yang rendah dengan sebaran yang menunjukkan proses mixing untuk parameter suhu permukaan laut, dan menunjukkan nilai yang lebih tinggi dengan sebaran merata untuk parameter klorofil-a. Kata kunci: Suhu Permukaan Laut, Klorofil-a, El Nino, La Nina.
Phytoplankton Community Structure in Seagrass Beds of Nain Island Waters Mokosuli, Febrianty Dhea; Rimper, Joice R.T.S.L; Warouw, Veibe; Wullur, Stenly; Losung, Fitje; Mokolensang, Jeffrie F.
Jurnal Ilmiah Platax Vol. 12 No. 1 (2024): ISSUE JANUARY-JUNE 2024
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jip.v12i1.52339

Abstract

This study aims to identify phytoplankton species, calculate phytoplankton abundance, diversity index, uniformity index, phytoplankton dominance index, and determine environmental conditions such as temperature, pH, salinity, nitrate, and phosphate in the seagrass ecosystem of Nain Island Waters. Sampling includes seawater for the needs of phytoplankton identification measurement of nitrate and phosphate levels and measurement of water parameters in situ. Phytoplankton sampling is done horizontally using a plankton net. Phytoplankton identification found in the seagrass ecosystem of Nain Island Waters consisted of four classes, namely Bacillariophyceae (Rhizosolenia sp.; Nitzschia sp.; Chaetoceros sp.; Navicula sp.; Eucampi sp.; Pleurosigma sp.; Thalassionema sp.; Melosira sp.), Dinophyceae (Ceratium sp.; Protoperidinium sp.), Chlorophyceae (Spirogyra sp.), and Euglenophyceae (Euglena sp.). The calculation of phytoplankton abundance is in the range of 9 - 51 cells/l. The highest abundance was found at station one which was 51 cells/l, then station three which was 21 cells/l, and station two which was 9 cells//I. The diversity index is in the range of 0.8749 - 1.8668 which means there is community instability. The uniformity index is in the range of 0.2226 - 0.8460, while the dominance index is in the range of 0.2060 - 0.6093, this indicates that the water conditions are stable. Environmental conditions (temperature, salinity, pH, nitrate, and phosphate) in the seagrass ecosystem of Nain Island Waters are still quite good for phytoplankton growth. Keywords: Phytoplankton, Seagrass, Nain Island, Abundance, Biological Index Abstrak Penelitian ini bertujuan untuk identifikasi jenis-jenis fitoplankton, menghitung kelimpahan fitoplankton, indeks keanekaragaman, indeks keseragaman, indeks dominasi fitoplankton dan mengetahui kondisi lingkungan seperti suhu, pH, salinitas, nitrat, dan fosfat di ekosistem padang lamun Perairan Pulau Nain. Pengambilan sampel meliputi air laut untuk kebutuhan identifikasi fitoplankton dan pengukuran kadar nitrat dan fosfat perairan serta pengukuran parameter perairan secara In situ. Pengambilan sampel fitoplankton dilakukan secara horizontal dengan menggunakan plankton net. Fitoplankton yang ditemukan terdiri dari empat kelas yaitu Bacillariophyceae (Rhizosolenia sp. Nitzschia sp. Chaetoceros sp. Navicula sp. Eucampi sp. Pleurosigma sp. Thalassionema sp. Thalassionema sp. Melosira sp.), Dinophyceae (Ceratium sp. Protoperidinium sp.), Chlorophyceae (Spirogyra sp), dan Euglenophyceae (Euglena sp). Hasil perhitungan kelimpahan fitoplankton berada di kisaran 9 - 51 sel/l. Kelimpahan tertinggi ditemukan pada stasiun satu yaitu 51 sel/l, kemudian stasiun tiga yaitu 21 sel/l dan stasiun dua yaitu 9 sel/I. Indeks keanekaragaman berada pada kisaran 0,8749 - 1,8668 yang berarti adanya ketidakstabilan komunitas. Indeks keseragaman yaitu pada kisaran 0,2226 - 0,8460, sedangkan indeks dominasi berada pada kisaran 0,2060 - 0,6093, hal ini menunjukkan kondisi perairan dalam keadaan stabil. Kondisi lingkungan (suhu, salinitas, pH, nitrat dan fosfat) di ekosistem padang lamun Perairan Pulau Nain masih cukup baik untuk pertumbuhan fitoplankton. Kata kunci: Fitoplankton, Padang Lamun, Pulau Nain, Kelimpahan, Indeks Biologi
Spatial And Temporal Analysis Of Sea Surface Temperature Variability And Chlorophyll-A Over Two Decades In North Sulawesi Waters Buana, Muhammad Candra; Patty, Wilhelmina; Mantiri, Rose O. S. E.; Budiman, Johnny; Rimper, Joice R.T.S.L.; Rangan, Jety K.; Sumilat, Deiske Adeliene
Jurnal Ilmiah Platax Vol. 12 No. 2 (2024): ISSUE JULY-DECEMBER 2024
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jip.v12i2.55621

Abstract

Sulawesi waters are directly affected by the dynamics that occur in the Pacific Ocean. The ENSO phenomenon that occurs in the Pacific Ocean can also be felt in the waters of the Sulawesi Sea. The dynamics of oceanographic parameters can cause climate change. The extreme impact of climate change is mainly the occurrence of rising temperatures and seasonal shifts. The purpose of this study is to analyze the variability of spatial and temporal anomalous distribution of sea surface temperature and chlorophyll-a. This study used monthly AQUA Modis image data, conducted by analyzing the spatial and temporal distribution of sea surface temperatures during the two decades of the period 2003 - 2022. This analysis is based on abnormal values obtained from subtracting parameter values from historical values (the average value of all data). The results of spatial variability analysis of sea surface temperature and chlorophyll –show anomalous variations occur in the western and transitional season periods I, while in the eastern season and transition II positive anomalous values dominate the eastern waters negative anomalies dominate the western waters opposite to chlorophyll – a. This study showed that there was an increase in sea surface temperature slope by 0.000840C / year while in chlorophyll - a there was a decrease in slope by 0.00072mg / m3 / year. Keywords: Spatial, Temporal, SPL, Chlorophyll – a, Climate Change. Abstrak Perairan Sulawesi mendapatkan pengaruh secara langsung dari dinamika yang terjadi di Samudera Pasifik. Fenomena ENSO yang terjadi di Samudera Pasifik juga dapat dirasakan dampaknya di perairan Laut Sulawesi. Dinamika parameter oseanografi dapat menyebabkan terjadinya perubahan iklim. Dampak ekstrem dari perubahan iklim terutama adalah terjadinya kenaikan temperatur serta pergeseran musim. Tujuan penelitian ini Menganalisis Variabilitas distribusi anomali spasial dan temporal dari suhu permukaan laut dan klorofil – a, Penelitian ini menggunakan data citra AQUA Modis bulanan, dilakukan dengan menganalisis sebaran spasial dan temporal suhu permukaan laut selama dua dekade periode 2003 - 2022. Analisa ini didasarkan pada nilai anomali yang didapat dari pengurangan nilai parameter dengan nilai historis (rerata nilai seluruh data). Hasil analisis variabilitas spasial suhu permukaan laut dan klorofil – a menunjukan variasi anomali terjadi pada periode musim barat dan peralihan I , sedangkan pada musim timur dan peralihan II nilai anomali positif mendominasi perairan sebelah timur anomali negatif mendominasi perairan sebelah barat sebaliknya dengan klorofil – a. Penelitian ini menunjukan bahwa terjadi peningkatan slope suhu permukaan laut sebesar 0,000840C/ tahun sedangkan pada klorofil - a terjadi penurunan slope sebesar 0,00072mg/m3/tahun. Kata kunci: Spasial, Temporal, SPL, Klorofil – a, Perubahan Iklim.
Study of Scleractinian Coral Recruitment in the Waters of Tanjung Pisok and Siladen Island, Bunaken National Park Lenak, Maria Magdalena; Roeroe, Kakaskasen; Paruntu, Carolus; Mangindaan, Remy; Manembu, Indri; Rimper, Joice
Jurnal Ilmiah Platax Vol. 13 No. 1 (2025): ISSUE JANUARY-JUNE 2025
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jip.v13i1.58540

Abstract

The research aimed to determine the recruitment density value of scleractinian coral juveniles in Tanjung Pisok (Meras and Bahowo) and Siladen Island. The method for selecting observation locations uses purposive sampling and collecting coral juvenile recruitment data using underwater photo transects. The results of this research obtained data on genus, size, and density values ​​for coral juvenile recruitment. The coral genera found at Station I were 19 genera with the largest number being the Porites genus, 32 colonies, Station II 13 genera with the largest number being the Favites genus, 32 colonies, and at Station III 17 genera with the largest number being the Porites genus, 32 colonies. Coral juveniles in this study were more dominant in the 2 cm - 2.9 cm size group, for Station I 63 colonies, Station II 54 colonies and Station III 32 colonies. Based on the results of this research, it shows that the coral recruitment density at Station I with a value of 12.38 colonies/m² is higher than Station II, the coral recruitment density at Station II with a value of 12.23 colonies/m² is higher than Station III with a value of 7.21 colonies/m². Keywords: Recruitment; Scleractinia; Underwater Photo Transect; Bunaken National Park Abstrak Tujuan penelitian menentukan nilai densitas rekrutmen juvenil karang scleractinia di perairan Tanjung Pisok (Meras dan Bahowo) dan pulau Siladen. Metode pemilihan lokasi pengamatan menggunakan purposive sampling dan metode pengumpulan data rekrutmen juvenil karang menggunakan underwater photo transect. Hasil penelitian ini memperoleh data genus, ukuran dan nilai densitas rekrutmen juvenil karang. Genus karang yang didapat di Stasiun I yaitu 19 genus dengan yang terbanyak genus Porites 32 koloni, Stasiun II 13 genus dengan yang terbanyak genus Favites 32 koloni, dan Stasiun III 17 genus dengan yang terbanyak genus Porites 32 koloni. Juvenil karang dalam penelitian ini lebih dominan pada kelompok ukuran 2 cm - 2.9 cm, untuk Stasiun I 63 koloni, Stasiun II 54 koloni dan Stasiun III 32 koloni. Berdasarkan hasil penelitian ini menunjukkan densitas rekrutmen karang di Stasiun I dengan nilai 12,38 koloni/m² lebih tinggi dari Stasiun II, densitas rekrutmen karang di Stasiun II dengan nilai 12,23 koloni/m² lebih tinggi dari Stasiun III dengan nilai 7,21 koloni/m². Kata kunci: Rekrutmen; Scleractinia; Taman Nasional Bunaken; Underwater Photo Transect