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All Journal AQUATIC SCIENCE & MANAGEMENT e-Journal BUDIDAYA PERAIRAN JURNAL PESISIR DAN LAUT TROPIS JURNAL ILMIAH PLATAX JURNAL LPPM BIDANG SAINS DAN TEKNOLOGI
Erly Y. Kaligis, Erly Y.
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Earth & Planetary Sciences Education Environmental Science

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VIABILITAS ROTIFER Brachionus rotundiformis STRAIN MERAS PADA SUHU DAN SALINITAS BERBEDA Kaligis, Erly Y.
JURNAL LPPM BIDANG SAINS DAN TEKNOLOGI Vol 2, No 1 (2015)
Publisher : JURNAL LPPM BIDANG SAINS DAN TEKNOLOGI

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Abstract

Rotifer jenis Brachionus rotundiformis merupakan salah satu spesies zooplankton yang dijumpai mendominasi perairan tambak di beberapa lokasi di Sulawesi Utara, antara lain di pertambakan Meras, Manado. Rotifer strain lokal ini telah diteliti untuk mengetahui potensi reproduksinya melalui kajian viabilitas lewat pemeliharaan pada suhu dan salinitas berbeda menggunakan pakan Chlorella sp. Metode yang digunakan dalam penelitian adalah metode kultur individu. Perlakuan yang digunakan adalah kombinasi suhu (250C, 300C, 350C) dengan salinitas (30 ppt, 35 ppt, 40 ppt). Percobaan diawali inokulasi telur generasi pertama ke dalam multiwellplate. Tiap cekungan wadah diisi satu individu dengan kepadatan pakan 3x106 sel/ml. Pengamatan dilakukan dua kali sehari dengan interval 12 jam. Data yang diperoleh selanjutnya dianalisis dengan metode life table. Hasil penelitian menunjukkan tingkat lulus hidup tertinggi sekitar 91% sampai 5 hari dicapai pada suhu 250C dengan salinitas 35 ppt, demikian juga harapan hidup terlama pada kondisi demikian yaitu sampai 8 hari. Sedangkan harapan hidup terpendek hanya 3,62 hari dicapai pada suhu 300C dengan salinitas 30 ppt. Puncak fertilitas tertinggi yaitu 7,3 didapatkan pada suhu 300C dengan salinitas 40 ppt, namun kombinasi suhu 250C dengan salinitas 35 ppt merupakan perlakuan optimal untuk laju pertumbuhan melalui hasil nilai Ro tertinggi yaitu 14,23.
KUALITAS AIR DAN PERTUMBUHAN POPULASI ROTIFER Brachionus rotundiformis STRAIN TUMPAAN PADA PAKAN BERBEDA Kaligis, Erly Y.
JURNAL LPPM BIDANG SAINS DAN TEKNOLOGI Vol 2, No 2 (2015)
Publisher : JURNAL LPPM BIDANG SAINS DAN TEKNOLOGI

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Abstract

Tujuan dari penelitian adalah membandingkan pertumbuhan populasi rotifer Brachionus rotundiformis yang diberi perlakuan pakan mikroalga Nannochloropsis oculata dan ikan mentah, serta mendapatkan data kualitas air dari medium kultur dengan pakan berbeda. Pengambilan sampel rotifer di desa Tumpaan Kabupaten Minahasa Selatan, berupa areal reklamasi dan tempat pembuangan air limbah rumah tangga. Rotifer kemudian diidentifikasi dan dikultur klon sehingga tersedia stok untuk penelitian. Perlakuan pakan menggunakan mikroalga Nannochloropsis oculata dan ikan mentah jenis tongkol (Euthynus sp.). Mikroalga sebelumnya diperbanyak lewat kultur menggunakan media KW21 dalam kondisi laboratorim. Ikan mentah sebanyak 3 g digunakan sedangkan kepadatan rotifer adalah 10 ind/ml. Pengambilan data populasi rotifer dimulai dari hari pertama hingga mencapai puncak populasi, sedangkan data kualitas air pada wadah kultur diambil pada akhir penelitian yaitu berupa data suhu, salinitas, DO, pH, ammonia, nitrat, dan nitrit. Hasil penelitian pertumbuhan populasi rotifer dengan pakan ikan mentah menunjukkan puncak populasi lebih tinggi (190 ind.ml-1) dibanding kultur dengan pemberian mikroalga (93 ind. ml-1). Nilai kualitas air yang terlihat berbeda adalah nilai ammonia yaitu pada media dengan pakan mikroalga 1,24 mg/l, sedangkan pada media ikan mentah adalah 9,80 mg/l.
Comparison of operational costs and production of fresh tuna products; before and during the Covid-19 pandemic in Talaud Islands Regency, North Sulawesi Province Naung, Pelia; Luasunaung, Alfret; Andaki, Jardie A.; Suhaeni, Siti; Kaligis, Erly Y.; Manembu, Indri S.
AQUATIC SCIENCE & MANAGEMENT Vol 9, No 1 (2021): APRIL
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jasm.9.1.2021.33855

Abstract

Covid-19 pandemic has implications for all aspects of fishery activities in Indonesia, one of them is negative impact on the supply chain of the fishery business. To find out more about this impact, the study was aimed to determine the condition, in general, of tuna capture fisheries in the Talaud Islands Regency before and during the Covid-19 Pandemic, and to find out the comparison of operational costs and production of fresh tuna at the level of fishermen and intermediary traders in the area in both periods. Data collection was carried out in April 2020 to March 2021. Three districts in the area were selected as research locations, namely Salibabu, Gemeh, and South Essang. Surveys using questionnaires were conducted on respondents at predetermined locations. Comparative analysis using t-test was applied in this study. The results showed that the pandemic has caused, among other things, a decline in fish prices, effect in community's economy, and a decrease of tuna production. Tuna production is particularly important because while it affected the production, the operational costs remained constant. This occurs at all levels, both at the level of fishermen and at the level of intermediary traders. It can be concluded that the Covid-19 pandemic has had an impact on fresh tuna fishing activities in the area where fresh tuna production has decreased and tuna buying traders are not operating. In particular, the operational costs of catching tuna at the fisherman's level are the same, both before and during the pandemic. Meanwhile, tuna production has decreased dramatically during the pandemic. This also happens at the level of intermediary traders.Indonesian title: Komparasi biaya operasional dan produksi produk tuna segar pada masa sebelum dan selama Pandemi Covid-19 di Kabupaten Kepulauan Talaud, Provinsi Sulawesi Utara
Efektivitas ekstrak daun akar kucing (Acalypha indica) dalam meningkatkan pertumbuhan ikan Nila, Oreochromis niloticus Ratusmanga, Jihan; Hutagaol, Anggun F.; Manoppo, Henky; Lantu, Sartje; Tumbol, Reiny A.; Mokolensang, Jeffrie F.; Kaligis, Erly Y.
e-Journal BUDIDAYA PERAIRAN Vol 10, No 1 (2022)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/bdp.10.1.2022.35531

Abstract

The purposes of research were to examine the effect of extract of Acalypha indica leaf on the growth of Nile tilapia and determine the dose of leaf extract that could enhance the growth of tilapia optimally. The fish used were Nile tilapia taken from the Tatelu Center for Freshwater Aquaculture with an average weight of 3.79±0.50 g. The medicinal plant A. indica was collected from around the Faculty of Fisheries and Marine Science complex and from the North Bolaang Mongondow area. After being washed, the leaves were dried and then ground to obtain leaf powder. Leaf flour was then extracted by maceration method with 95% alcohol solvent. After being concentrated, the extract was then used as a treatment with different concentrations, including A: 0 g extract/kg feed, B:10 g extract/kg feed, C:20 g extract/kg feed, D:30 g extract/kg feed and E: 40g extract/kg feed. The data collected consisted of absolute growth, daily growth and relative growth. The results showed that the extract of A. indica leaf added to the feed had a significantly effect on the growth of tilapia indicated by an increase in absolute growth, daily growth, and relative growth (p<0.05). The best fish growth was achieved in fish fed with feed with the addition of 20 g extract/kg feed. In conclusion, leaf extract of A. indica can increase the growth of Nile tilapia
Pertumbuhan dan kelangsungan hidup benih ikan Nila (Oreochromis niloticus) salin dengan pemberian pakan komersial yang berbeda Kirikanang, Zefanya V.; Longdong, Sammy N.J; Monijung, Revol D.; Kalesaran, Ockstan J.; Kaligis, Erly Y.
e-Journal BUDIDAYA PERAIRAN Vol 10, No 2 (2022)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/bdp.10.2.2022.37816

Abstract

This study aimed to determine the growth rate and survival of saline tilapia (Oreochromis niloticus) seeds with fed with different types of commercial feed. The study was conducted at the Aquaculture Technology Laboratory in April – July 2021. The experiment was designed using a completely randomized design (CRD) with 4 treatments, each with three replications. The treatments included A: Comfeed brand feed, B: Bintang brand feed, C: Turbo Feed brand feed, D: Supra ZT brand feed. The results of the analysis of variance showed that different commercial feeds had a significant effect on absolute weight growth and specific growth, very significant for absolute length growth, but on survival rates had no significant effect. The results of the BNT test on showed absolute weight growth and specific growth showed of treatment B was not significantly different from treatment A but significantly different from treatments C and D. While for absolute length growth, treatment B was significantly different from treatments D, C, and A. Treatment D, C, and A were not significantly different from each other.
Morphological identification of crabs in the rocky coast of Manado Bay Rustikasari, Irna; Paransa, Darus S. J.; Kaligis, Erly Y.; Ompi, Medy; Pelle, Wilmy E.; Pratasik, Silvester B.
Jurnal Ilmiah Platax Vol. 9 No. 2 (2021): ISSUE JULY-DECEMBER 2021
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jip.9.2.2021.35200

Abstract

Coastal areas have a wealth of biological natural resources including marine life such as crustaceans. One of the marine organisms in the crustacean group is the crab. The purpose of this study was to identify the types of crabs that live in rocky coastal habitats through a morphological approach. To determine the morphology of crabs can be done by looking at the shape, color, and size. The results of this study found 3 types of crabs in two locations in the Manado Bay area including the crab is Grapsus albolineatus, Ozius truncatus, and Uca (Galasimus) tetragonon. Based on the results of the research above, morphological forms were found on the abdomen in the form of a tapered triangle which indicated that the crab was male and the abdomen was triangular with the female sex. The most common crabs found at the study site were female crabs.Keywords: Coastal Area; Crab; Morphology AbstrakWilayah pesisir memiliki kekayaan sumber daya alam hayati diantaranya biota laut seperti krustasea. Salah satu organisme laut dalam golongan krustasea adalah kepiting. Tujuan dari penelitian ini adalah untuk mengidentifikasi jenis kepiting yang hidup di habitat pantai pesisir berbatu melalui pendekatan morfologi. Untuk mengetahui morfologi pada kepiting dapat dilakukan dengan melihat bentuk, warna serta ukuran. Hasil penelitian ini menemukan 3 jenis spesies kepiting pada dua lokasi yang berada di daerah Teluk Manado diantaranya kepiting Grapsus albolineatus Ozius truncatus dan Uca (Galasimus) tetragonon. Berdasarkan hasil penelitian diatas maka ditemukan bentuk morfologis pada bagian abdomen berbentuk segitiga meruncing yang menunjukkan bahwa kepiting tersebut berkelamin jantan dan abdomen berbentuk segitiga melebar merupakan kepiting dengan jenis kelamin betina. Kepiting yang paling banyak ditemukan pada lokasi penelitian adalah kepiting betina.  Kata Kunci: Wilayah Pesisir; Kepiting; Morfologi 
Cell Density Of Microalgae Tetraselmis chuii, With Lead Acetate Compound (Pb(Ch3COO)2) at Different Concentrations Kadang, Nurfadillah; Kemer, Kurniati; Mantiri, Desy Maria Helena; Kaligis, Erly Y.; Rumampuk, Natalie D.C.; Pelle, Wilmy Etwil
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.v12i2.49957

Abstract

Microalgae are a group of microscopic plants, included in the algae class, with a diameter of between 3-30 µm, single cells, and colonies that can live in all areas of fresh water and seawater. Microalgae contain active components that can be used in the cosmetic, food, pharmaceutical, and nutraceutical industries. This study aimed to determine the density of marine microalgae Tetraselmis chuii cells in culture media before treatment and to determine the density of T.chuii microalgae cells by administering lead acetate compounds at different concentrations. The method used in this study was culturing marine microalgae cells in balanced containers with lead acetate administration at concentrations of 30 ppm, 50 ppm, and 70 ppm, then observations were made by counting the number of cells under an Olympus microscope with 10x magnification using a hemocytometer. Observations were made every day at the same hour until the death phase. Microalgae culture uses a Light Emitting Diode (LED) lamp with 6,840 lux lighting. The results showed that the growth of T.chuii microalgae cells after administration of lead acetate compound showed unstable growth compared to the untreated container (control). Keywords: Microalgae; Tetraselmis chuii; Culture; Lead Acetate. Abstrak Mikroalga merupakan kelompok tumbuhan yang berukuran sangat kecil termasuk dalam kelas alga, memiliki diameter antara 3-30 μm baik sel tunggal maupun koloni yang dapat hidup di seluruh wilayah perairan air tawar maupun air laut. Mikroalga mengandung komponen aktif yang dapat digunakan dalam bidang industri kosmetik, makanan, farmasetika dan nutrasetikal. Adapun tujuan dari penelitian ini yaitu untuk mengetahui kepadatan sel mikroalga laut Tetraselmis chuii dalam media kultur sebelum perlakuan dan mengetahui kepadatan sel mikroalga T.chuii dengan pemberian senyawa timbal asetat pada konsentrasi yang berbeda. Metode yang digunakan pada penelitian ini yaitu mengkultur sel mikroalga laut pada wadah terkontrol dengan pemberian timbal asetat pada konsentrasi 30 ppm, 50 ppm, 70 ppm, kemudian dilakukan pengamatan melalui perhitungan jumlah sel di bawah mikroskop olympus dengan pembesaran 10x menggunakan haemocytometer. Pengamatan dilakukan setiap hari pada jam yang sama sampai pada fase kematian. Kultur mikroalga menggunakan lampu Light Emitting Diode (LED) dengan pencahayaan 6.840 lux. Hasil penelitian menunjukkan bahwa pertumbuhan mikroalga mikroalga T.chuii mengalami penurunan sel secara signifikan setelah pemberian senyawa timbal asetat dibandingkan dengan kontrol yang tidak diberi perlakuan. Kata kunci: Mikroalga; Tetraselmis chuii; Timbal Asetat.
Species and Density of Gastropods on The Intertidal Zone of The Rocky Shore at Akaiwa, Tomioka, Amakusa, Japan Karundeng, Joyfullness; Paruntu, Carolus P.; Rumengan, Inneke F. M.; Sinjal, Cathrien A. L.; Kemer, Kurniati; Kaligis, Erly Y.
JURNAL PESISIR DAN LAUT TROPIS Vol. 14 No. 1 (2026): JURNAL PESISIR DAN LAUT TROPIS
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jplt.14.1.2026.66342

Abstract

Gastropods are a class belonging to the phylum Mollusca, characterised by a single shell and radula. In intertidal ecosystems, they serve as herbivores, detritivores, or predators, and are often used as indicators of environmental health. This study examines the density of gastropods in the rocky shore habitat of Akaiwa, Tomioka Peninsula, Japan. Samples were collected using random quadrats (25x25 cm) in the upper (R1) and lower (R2) intertidal zones. The results show variations in density between zones. In the upper zone (R1), density ranged from 17.60 ind/m² (Japeuthria cingulata) to 52.80 ind/m² (Thais clavigera). Meanwhile, in the lower zone (R2), density ranged from 4.80 ind/m² (Clypeomorus petrosa) to 52.80 ind/m² (Lunella correensis). The species Cellana nigrolineata also showed high density in both zones (R1: 41.60 ind/m²; R2: 54.40 ind/m²). Overall, the density pattern on the rocky shore of Akaiwa indicates variation influenced by vertical zonation, where distinct physical characteristics and environmental pressures in each zone shape the unique distribution of gastropod abundance. Keywords: Akaiwa, density, gastropoda, intertidal zone, rocky shore   Abstrak Gastropoda adalah kelas dalam filum Moluska  yang dicirikan oleh cangkang tunggal dan radula. Dalam ekosistem intertidal, mereka berperan sebagai herbivor, detritivor, atau predator, serta sering menjadi indikator kesehatan lingkungan.  Penelitian ini bertujuan untuk menghitung kepadatan gastropoda di habitat pantai Rocky Akaiwa, Semenanjung Tomioka, Jepang. Sampel diambil menggunakan kuadrat acak (25x25 cm) pada zona intertidal atas (R1) dan bawah (R2). Hasil menunjukkan variasi kepadatan antar zona. Di zona atas (R1), kepadatan berkisar antara 17,60 ind/m² (Japeuthria cingulata) hingga 52,80 ind/m² (Thais clavigera). Sementara di zona bawah (R2), kepadatan berkisar antara 4,80 ind/m² (Clypeomorus petrosa) hingga 52,80 ind/m² (Lunella correensis). Spesies Cellana nigrolineata juga menunjukkan kepadatan tinggi di kedua zona (R1: 41,60 ind/m²; R2: 54,40 ind/m²). Secara umum, pola kepadatan di pantai Rocky Akaiwa menunjukkan variasi yang dipengaruhi oleh zonasi vertikal, dengan karakteristik fisik dan tekanan lingkungan yang berbeda di setiap zona membentuk distribusi kelimpahan gastropoda yang khas. Kata kunci: Akaiwa, kepadatan, gastropoda, pantai rocky, zona intertidal
Co-Authors Alfret Luasunaung Carolus Paulus Paruntu Darus S. Paransa Henky Manoppo Hutagaol, Anggun F. Indri Manembu Inneke F. M Rumengan Jardie A. Andaki Kadang, Nurfadillah Karundeng, Joyfullness Kirikanang, Zefanya V. Kurniati Kemer Mantiri, Desy M. H Medy Ompi Mokolensang, Jeffrie F. Monijung, Revol D. Natalie D Rumampuk Naung, Pelia Ockstan J. Kalesaran Pelle, Wilmy E. Pelle, Wilmy Etwil Ratusmanga, Jihan Reiny A. Tumbol Rustikasari, Irna Sammy N.J Longdong Sartje Lantu Silvester B Pratasik Sinjal, Cathrien A. L. Siti Suhaeni, Siti