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Alfret Luasunaung
Sam Ratulangi University
Environmental Science

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Analysis Of Weather Conditions and Hydrodynamics in Taman Nasional Bunaken Ben Arther Molle; Joshian Nicolas William Schaduw; Deiske Adeliene Sumilat; Ari Berty Rondonuwu; Alfret Luasunaung; Veibe Warouw
Jurnal Ilmiah PLATAX Vol. 10 No. 2 (2022): ISSUE JULY-DECEMBER 2022
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jip.v10i2.43161

Abstract

Taman Nasional Bunaken (TNB) is located in North Sulawesi Province, Republic of Indonesia. TNB offers an exploration experience of marine tourism such as snorkeling and diving. This study was conducted to determine the statistics and correlation of weather parameters on hydrodynamics in the waters of the small island of TNB. This information can be used by marine tourism users. The weather data studied are wind direction and speed. The hydrodynamic conditions studied were wave height and ocean currents. Respondent surveys were also conducted on tourist users at the research sites. The wind direction for the period January - April is dominant from the Northeast, May - September is dominant from the East to the South, October tends to be evenly distributed from the East to the West, and November - December is dominant from the West. Significant wind speeds that occur in January, February, and March range from 18 – 36 knots. The average wave height shows a significant value in January – March, tends to be lower in April – June, fluctuates in July – November, and increases again in December. The maximum current velocity at a sea depth of 16.5 m is stronger than the maximum speed at a depth of 0.5 m and 8.0 m in January – April, and May August. The correlation value of wind speed and sea wave height is significant at 0.96 and the correlation between wind speed and the current speed is 0.74. These results indicate that there is a strong -very strong relationship between parameters. The survey results show that wind speed, wave height, and ocean currents have the same pattern. January, February, November, and December are the months of extreme or bad weather and hydrodynamic conditions.Keywords: Taman Nasional Bunaken, Weather, Hydrodynamics, CorrelationAbstrakTaman Nasional Bunaken (TNB) terletak di Provinsi Sulawesi Utara, Negara Republik Indonesia. TNB  menawarkan pengalaman eksplorasi suasana wisata bahari seperti snorkling dan diving. Penelitian ini dilakukan untuk mengetahui statistik dan korelasi parameter cuaca terhadap hidrodinamika di perairan pulau kecil TNB. Informasi tersebut dapat digunakan oleh pengguna wisata bahari. Data cuaca yang diteliti adalah arah dan kecepatan angin. Kondisi hidrodinamika yang diteliti ialah tinggi gelombang dan arus laut. Survei responden juga dilakukan kepada pengguna wisata di lokasi penelitian. Arah angin periode Bulan Januari - April dominan dari arah Timur Laut, Bulan Mei – September dominan dari arah Timur hingga Selatan, Bulan Oktober cenderung merata dari arah Timur hingga Barat dan Bulan November – Desember dominan dari arah Barat. Kecepatan angin signifikan terjadi pada bulan Januari, Februari, dan Maret berkisar antara 18 – 36 Knot. Rata-rata tinggi gelombang menunjukan nilai signifikan pada bulan Januari – Maret, cenderung merendah pada bulan April – Juni, berfluktuasi pada bulan Juli – November dan meningkat kembali di bulan Desember. Kecepatan maksimum arus laut di kedalaman 16.5 m lebih kuat jika dibandingkan kecepatan maksimum di kedalaman 0.5 m dan 8.0 m pada bulan Januari – April serta bulan Mei – Agustus. Nilai korelasi kecepatan angin dan tinggi gelombang laut signifikan sebesar 0.96 serta korelasi kecepatan angin dan kecepatan arus sebesar 0.74. Hasil tersebut menunjukkan antar parameter memiliki hubungan yang kuat - sangat kuat. Hasil survei menunjukan kecepatan angin, tinggi gelombang dan arus laut mempunyai pola yang sama. Bulan Januari, Februari, November, dan Desember merupakan bulan-bulan terjadinya kondisi cuaca serta hidrodinamika ekstrem atau buruk.Kata kunci: Taman Nasional Bunaken, Cuaca, Hidrodinamika, Korelasi
Analysis of fishing season for tuna (Thunnus spp.), little tuna (Euthynnus sp.) and skipjack (Katsuwonus pelamis) in FMA 716 Adel M. Tuyu; Alfret Luasunaung; Deiske A. Sumilat; Lefran Manoppo; Frangky E. Kaparang; Rose O. S. E. Mantiri; Veibe Warouw
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.v11i1.44633

Abstract

Economically important pelagic fish species in FMA 716 include skipjack (Katsuwonus pelamis), tuna (Thunnus spp.) and frigate tuna (Euthynnus sp.), these pelagic fish species are caught intensively. This study aims to provide information on the appropriate season for catching tuna, skipjack and tuna in FMA 716. The results of the study show the pattern of the tuna, skipjack and frigate tuna (TCT) fishing season based on the catches landed in PPS Bitung and PPP Tumumpa with fishing areas in FMA 716, i.e. the results vary every year but the peak of the fishing season occurs in the eastern transitional season. West - September, October and November. Peak fishing season for skipjack and tuna occurs three times and frigate tuna 2 times in 5 years. Keywords: catching season, Katsuwonus pelamis, Thunnus spp and Euthynnus sp,FMA 716 Abstrak: Jenis ikan pelagis ekonomis penting di WPP 716 antara lain adalah cakalang (Katsuwonus pelamis), tuna (Thunnus spp.) dan tongkol (Euthynnus sp.), jenis – jenis ikan pelagis tersebut ditangkap secara intensif. Penelitian ini bertujuan memberikan informasi musim yang tepat untuk melakukan penangkapan ikan tuna, cakalang dan tongkol di WPP 716. Hasil penelitian menujukan pola musim penangkapan ikan Tuna, Cakalang dan Tongkol (TCT) berdasarkan hasil tangkapan yang didaratkan di PPS Bitung dan PPP Tumumpa dengan wilayah penangkapan di WPP 716 yaitu hasilnya bervariasi setiap tahunnya tetapi yang terbanyak puncak musim penagkapan ikan terjadi pada musim masa peralihan timur-barat yaitu bulan September, Oktober dan November. Puncak musim penangkapan ikan cakalang dan tuna terjadi sebanyak tiga kali dan ikan tongkol 2 kali dalam 5 tahun. Kata kunci : Musim penangkapan ikan tuna, tongkol dan cakalang, WPP 716
Seagrass Community Structure at Ratatotok Beach, Southeast Minahasa Regency Dhebby Purba; Billy Wagey; Alfret Luasunaung; Indri Manembu; Deiske Sumilat; Rose Mantiri
Jurnal Ilmiah PLATAX Vol. 11 No. 2 (2023): ISSUE JULY-DECEMBER 2023
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jip.v11i2.47824

Abstract

The purpose of this research is to know about the type of seagrass, the community structure of seagrass based on the density of type, the density of the relatively, type of frequency, frequency relatively, type of cover, cover relatively, diversity index, dominance and parameter index in surrounding water environment of seagrass at Ratatotok beach. The result of this research is identifying 4 species, namely; Thalassia hemprichii, Enhalus acoroides, Syringodium isoetifolium dan Halodule pinifolia. The value of density is 39 indv/m2, the value type of frequency is 7.9, the value type of cover is 39.15, importance value index had 159.04%. Thalassia hemprichii, diversity index is “medium” with an average value (H’) of 2.63 and a higher importance index with an average value of C of 0.82. Surrounding waters at Ratototok Beach got a “medium” value of seagrass cover value is 39%. Environmental parameters in surrounding waters at Ratatotok beach had a value within; Temperature 31.95 0C, salinity 29.79o/oo, pH 7.62, DO 5.60 mg/L and the type of substrate found is sandy, sandy mud and coral fragments. Keywords: Seagrass, Community structure, Ratatotok beach. Abstrak Tujuan dilakukan penelitian ini yaitu mengetahui jenis lamun, struktur komuntas lamun berdasarkan kepadatan jenis, kepadatan relatif, frekuensi jenis, frekuensi relatif, penutupan jenis, penutupan relatif, indeks keanekaragaman, indeks dominansi dan parameter lingkungan perairan padang lamun yang berada di sekitar Pantai Ratatotok. Hasil yang di peroleh dari penelitian ini teridentifikasi 4 spesies, yaitu: Thalassia hemprichii, Enhalus acoroides, Syringodium isoetifolium dan Halodule pinifolia. Dengan nilai kepadatan 39 ind/m2, frekuensi jenis 7,9, penutupan jenis 39,15, Indeks nilai penting (INP) diperoleh nilai 159,04 %,  pada Thalassia hemprichii, Indeks keanekaragaman “sedang” dengan nilai rata-rata (H’) 2,63 dan indeks dominansi tinggi dengan nilai rata-rata C 0,82. Berdasarkan kategori penutupan lamun yang terdapat di sekitar Perairan Ratatotok dikategorikan “sedang” dengan nilai penutupan 39%. Parameter lingkungan antara lain: suhu 31,95 0C, salinitas 29,79 o/oo, pH 7,62, DO 5,60 mg/l dan jenis substrat yang di temukan adalah berpasir, pasir berlumpur dan pecahan karang. Kata kunci : Lamun, Struktur Komunitas, Pantai Ratatotok
Length Weight Relationship of Bigeye Scad (Selar crumenophthalmus) Catch by Purse Seine in Manado Bay Geral Manuel Makarondong; Effendi P. Sitanggang; Ivor L. Labaro; Alfret Luasunaung; Lefrand Manoppo; Fransisco P. T. Pangalila; Arman Thamin
Jurnal Ilmiah PLATAX Vol. 10 No. 1 (2022): ISSUE JANUARY-JUNE 2022
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jip.v10i1.39718

Abstract

The intensity of the catch of bigeye scad (Selar crumenophthalmus), is expected to cause problems in the availability of these fish resources. The purpose of this research is to analyze the Length-weight relationship of Bigeye scad caught by purse seine in Manado Bay. as well as to evaluate the results of the analysis of the Length-weight relationship and the catchment feasibility of the catch to support the sustainability of the potential of bigeye scad resources. The method used in this study is a quantitative method. conducted at Tumumpa Manado Coastal Fisheries Port, using fork length measurement data (FL) and weight of bigeye scad taken by the author under the guidance of lecturers in May 2021 and November 2021. Length-weight relationship of bigeye scad caught in May 2021 follows the equation W = 0,0249 L2.8057 with K = 1.01 and in November 2021 W = 0,0207 L2.9151. The type of bigeye scad in both seasons is categorized as negative allometric. This fish is categorized as unfit to catch (Lc < Lm). The structure of the catch in May 2021 obtained an average length of 10.26 ± 0.26 cm and an average weight of 18.03 ± 1.51 g where 51% were caught at a size of 9.8-10.8 cm and 46% had a weight of 11.0-16.0 g. while in November 2021 the average length was 10.90 ± 0.28 cm and the average weight was 22.53 ± 1.76 g where 50% were caught at a size of 10.0-11.0 cm and 31% g weight 21.0-26.0 g.Keywords: Bigeye Scad; Length Weight Relationship; Decent Catch; Purse Sein; Manado BayAbstrakIkan Selar bentong memiliki cita rasa enak, disukai masyarakat, dan harganya pun murah. Intensitas ketertangkapan jenis ikan ini, diduga kelak akan menimbulkan masalah ketersediaan sumberdaya ikan ini. Tujuan penelitian ini menganalisis hubungan panjang berat ikan selar bentong hasil tangkapan kapal pukat cincin (purse seiners) di Teluk Manado, serta Mengevaluasi hasil analisis hubungan panjang berat ikan selar bentong dengan kelayakan tangkap hasil tangkapan untuk menopang keberlanjutan potensi sumberdaya ikan selar bentong ini. Metode yang digunakan pada penelitian ini yaitu metode kuantitatif, dilakukan di Pelabuhan Perikanan Pantai (PPP) Tumumpa Manado, dengan menggunakan data ukuran panjang cagak (fork length, FL) dan berat ikan selar bentong yang diambil oleh penulis di bawah bimbingan dosen pada Mei 2021 (musim Pancaroba I) dan November 2021 (musim Pancaroba II) yang tertangkap purse seiners di Teluk Manado. Hubungan panjang berat ikan selar bentong yang tertangkap pada Mei 2021 mengikuti persamaan W = 0,0249 L2.8057 dengan K = 1.01 dan pada November 2021 W = 0,0207 L2.9151. Tipe pertumbuhan ikan selar bentong pada kedua musim tersebut terkategori alometrik negatif (b < 3), ikan ini terkategori tidak layak tangkap (Lc < Lm). Struktur hasil tangkapan pada Mei 2021 diperoleh panjang rerata 10.26 ± 0.26 cm dan berat rerata 18.03 ± 1.51 g, di mana 51% tertangkap pada ukuran 9.8 - 10.8 cm dan 46% memiliki berat 11.0-16.0 g, sementara pada November 2021 panjang rerata 10.90 ± 0.28 cm dan berat rerata 22.53 ± 1.76 g, di mana 50% tertangkap pada ukuran 10.0-11.0 cm dan 31% memiliki berat 21.0-26.0 g.  Kata Kunci: Selar Bentong; Hubungan Berat Panjang; Kelayakan Tangkap; Pukat Cincin; Teluk Manado
Study of Planned Maintenance System Senior Admiral John Lie’s Training Ship on Shipping Safety Azhar Ariansyah Ansar; Alfret Luasunaung; Deiske Adeliene Sumilat; Revols Dolfi Ch Pamikiran; Frangky Erens Kaparang; Hens Onibala
Jurnal Ilmiah PLATAX Vol. 11 No. 2 (2023): ISSUE JULY-DECEMBER 2023
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jip.v11i2.48973

Abstract

The implementation of the ship maintenance management system on Rear Admiral Jhon Lie's training ship did not run optimally, which impacted the less-than-optimal condition of various training ship equipment because the crew did not carry out the ship maintenance system according to the procedure, resulting in the incident that the ship's anchor winch operation did not function optimally when the ship was anchored in Belang Port, Southeast Minahasa. This study aims to identify and analyze the positive and significant effect of the planned maintenance system on shipping safety. The primary data collection methods used in this study were questionnaires and interviews. In this study, data processing and presentation were in the form of diagrams and path analysis with structural equation modeling (SEM-PLS) using SmartPLS. From the results of the data analysis, the R-square value of shipping safety (Y) is 0.307, which means that the planned maintenance system (X1) and ship maintenance (X2) can affect shipping safety (Y) by 30.7%. Ship maintenance (X2) has a significant effect on sailing safety (Y), with P-values = 0.033 0.05 (hypothesis accepted). The planned maintenance system (X1) has a significant effect on sailing safety (Y), with a P-value of 0.037 0.05 (hypothesis accepted). As a result of the analysis, it was found that the planned maintenance system has a significant effect on shipping safety.
Co-Authors Adel M. Tuyu Ari Berty Rondonuwu Arman Thamin Azhar Ariansyah Ansar Ben Arther Molle Billy Wagey Deiske A. Sumilat Deiske Adeliene Sumilat Deiske Sumilat Dhebby Purba Effendi P. Sitanggang Frangky E. Kaparang Frangky Erens Kaparang Fransisco P. T. Pangalila Geral Manuel Makarondong Hens Onibala Indri Manembu Ivor L. Labaro Joshian Nicolas William Schaduw Lefran Manoppo Lefrand Manoppo Revols Dolfi Ch Pamikiran Rose Mantiri Rose O. S. E. Mantiri Veibe Warouw