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All Journal AKULTURASI (JURNAL ILMIAH AGROBISNIS PERIKANAN) AQUATIC SCIENCE & MANAGEMENT e-Journal BUDIDAYA PERAIRAN JURNAL ILMIAH PLATAX JURNAL PERIKANAN DAN KELAUTAN TROPIS
Edwin D Ngangi
Sam Ratulangi University
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Environmental Science

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Ekstrak daun kedondong laut (Polyscias fruticosa) sebagai modulator imun benih ikan nila (Oreochromis niloticus) Dahlia Malau; Reiny A. Tumbol; Sammy N. J. Longdong; Reni L. Kreckhoff; Winda M. Mingkid; Edwin L. A. Ngangi
e-Journal BUDIDAYA PERAIRAN Vol. 11 No. 2 (2023): April - Desember
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/bdp.v11i2.47718

Abstract

Disease control using medicinal plants is an alternative to antibiotics and chemicals in aquaculture. One type of plant with the potential for health management is Polyscias fruticosa or sea kedondong which contains flavonoids, saponins, methanol, and tannins that are efficacious as antihistamines, antioxidants, antivirals, antibacterials, anti-inflammatories, and anti-cancer. The aim of the study was to examine the effect of kedondong laut leaf extract on increasing the phagocytic activity of tilapia (Oreochromis niloticus), and to determine the appropriate concentration of kedondong laut leaf extract to increase the phagocytic activity of tilapia (O. niloticus) seeds. The leaves of kedondong laut are cleaned, washed, and dried for 14 days at room temperature and then ground using a blender to obtain an extract of coarse flour. The flour was extracted using the maceration method with 70% alcohol solvent with a ratio of coarse flour and the solvent 1:5. After 24 hours of soaking, the extract was filtered using Whatman paper No. 42, and the dregs were soaked again with the same volume of solvent for the same soaking time and filtered again. This process is done 3 times until the extract looks clear. The extract was then concentrated using a rotary evaporator to obtain a concentrated extract of about 30% of the initial total extract. The concentrated extract is then sprayed evenly using a sprayer into the feed according to the set treatment dose. The research design used was Completely Randomized with 5 treatments, each with 3 replications. The treatments used were A: 0%, B: 1%, C: 2%, D: 3%, and E: 4% extract/kg feed. Treatment feed was given for 4 weeks at a dose of 5%/body weight/day, and the frequency of feeding was 2 times a day at 08:00 and 16:00. The results showed that the administration of sea kedongong leaf extract had a very significant effect on the phagocytic activity of tilapia (p<0.01). The best results were achieved in fish treated with B (1% extract/kg) for 28 days. Keywords: medicinal plants, maceration, immune modulators, phagocytosis activity, disease control
Studi kasus rasio konversi pakan (FCR) di tambak intensif udang vanname (Litopenaeus vannamei) CV. Sinar Limunga Gompi, Wiranto; Sambali, Hariyani; Kalesaran, Ockstan J.; Ngangi, Edwin L.A.; Mudeng, Joppy D.; Mingkid, Winda M.
e-Journal BUDIDAYA PERAIRAN Vol. 11 No. 2 (2023): April - Desember
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/bdp.v11i2.52415

Abstract

Udang vanname (Litopenaeus vannamei) merupakan salah satu komoditas unggulan sektor perikanan budidaya nasional. Salah satu komponen strategi produksi budidaya intensif yang harus sering diperhatikan adalah nilai konversi pakan udang vanname. Tujuan penelitian adalah menganalisis average daily growth (ADG), survival rate (SR) dan feed conversion ratio (FCR) udang vanname di CV.Sinar Limunga Desa Iyok, Kecamatan Bolangitang Barat, Kabupaten Bolaang Mongondow Utara, Provinsi Sulawesi Utara. Metode yang digunakan adalah studi kasus terhadap tambak intensif udang vanname dengan masa budidaya Januari-Maret 2023. Hasil penelitian menunjukan bahwa pemeliharaan udang vanname selama 107 hari di tambak intensif dengan luas 1600 m2 menghasilkan udang dengan populasi akhir 181.780 ekor, berat udang rata-rata 22,7 gram, size 45 ekor/kg, SR 80%, biomassa 2.920 kg, pakan 3.212 kg dan FCR 1,1. Kata kunci : kelangsungan hidup, pertumbuhan, pakan, biomassa
Pertumbuhan benih ikan gabus (Channa striata) pada media pemeliharaan akuaponik menggunakan pakan komersil dengan komposisi protein berbeda Niti, Eukharistian; Mudeng, Joppy D.; Ngangi, Edwin L. A.; Pangkey, Henneke; Monijung, Revol D.; Longdong, Sammy N.J.
e-Journal BUDIDAYA PERAIRAN Vol. 12 No. 1 (2024): Januari - Juni
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/bdp.v12i1.53959

Abstract

This research aimed to determine the growth of snakehead fries t reared in aquaponic media and fed commercial fish food. The treatments consisted of treatment A with a protein content of 40%, B with a protein content of 35%, and C with a protein content of 30%, each with three replications. The research was conducted for 32 days. The research found the absolute growth of treatment a was 1.34 g, treatment b was 0.775 g, and treatment C was 0.605 g. The daily growth rate for treatment a was 4.18%, treatment b 2.42%, and treatment C 1.89%. Linear regression analysis between protein content in food and growth weight of snakehead fish fry had a strong relationship to both absolute growth and specific growth rate. The higher the protein content, the higher the weight growth of snakehead fry. Keywords: snakehead fish, aquaponic, commercial food, protein
Analisis kandungan organoklorin pada area akuakultur di Perairan Pulau Nain Pratasik, Gerald A.; Tumembouw, Sipriana S.; Kusen, Diane J.; Undap, Suzanne L.; Ngangi, Edwin L. A.; Kreckhoff, Reni L.
e-Journal BUDIDAYA PERAIRAN Vol. 12 No. 1 (2024): Januari - Juni
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/bdp.v12i1.55659

Abstract

Organochlorine pesticides are one type of pesticide that is often used and some organochlorine pesticides are included in the group of Persistent Organic Pollutants, this type of pesticide is a pollutant that is a problem because it is resistant and bioaccumulative. Organochlorine characteristics that can adversely affect the environment are; 1). Decomposes very long in soil, air, water, and in living things, and can also stay in the environment for a long time. 2). It can enter the food chain and accumulate in fat tissue, making it difficult to dissolve in water. 3). Can be carried far through air and water. Seeing the nature of organochlorine pesticides that can last a long time in the environment and can be carried away by air and water, and the discovery of organochlorines in Manado Bay does not rule out the possibility that organochlorine pesticides can also exist in the waters of Nain Island. The objectives of this study are: (1) Measuring the physical parameters of water chemistry (temperature, DO, pH, and salinity) and organochlorine pesticide levels in Nain Island waters, (2) Analyzing organochlorine levels in Nain Island seawater samples. Measurements and sampling were carried out on Nain Island, Wori District, North Minahasa Regency on May 22, 2023. The results showed that there were organochlorines of endrin and DDT types in the waters of Nain Island, the concentration of endrin and DDT did not exceed the threshold of seawater quality standards PP RI No. 22 of 2021. The results of measuring water quality parameters show that the measurement location is still under seawater quality standards. Keywords: pesticides, water quality, aquaculture, seaweeds
Produksi Eucheuma spp. di Sentra Akuakultur Provinsi Sulawesi Utara tahun 2023 Usoh, Yosua; Salindeho, Indra R.N.; Mudeng, Joppy D.; Ngangi, Edwin L. A.; Kreckhoff, Reni L.; Tumembouw, Sipriana S.
e-Journal BUDIDAYA PERAIRAN Vol. 12 No. 2 (2024): Juli - Desember
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

This study aimed to determine the seaweed production in North Sulawesi Province in 2023 and to find out the technical and non-technical factors that affect Eucheuma production in North Sulawesi. Data were collected by a survey through questionnaires, from existing records at related institutions as well as direct interviews with the farmers.  The results showed that the total Eucheuma production in North Sulawesi Province in 2023 only came from the production in North Minahasa Regency, namely Nain Village as much as 473.76 tons,  Nain Satu was 234.36 tons and Mantehage II Tangkasi  was 131.4 tons. Thus, the total seaweed production for North Sulawesi province for 2023 was  839.52 tons. Technical and non-technical factors that influenced production were the lack quality of seaweed seeds, polluted sea waters, unpredictable weather, pests and disease attacks that have not been resolved, lack of adequate cultivation facilities and infrastructure, lack of qualified human resources (HR), limited capital and seaweed prices. Keywords: Seaweed, Nain Induk, Nain Satu, Mantehage II Tangkasi.
Macroalgae Community Structure in Tanjung Merah Waters, Bitung City Achmad, Febrio V.; Kepel, Rene Ch.; Mandagi, Stephanus Vianny; Tilaar, Ferdinand F.; Tombokan, John L.; Ngangi, Edwin L. A.
Jurnal Ilmiah Platax Vol. 9 No. 1 (2021): ISSUE JANUARY - JUNE 2021
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jip.9.1.2021.34427

Abstract

Seaweed is a component of coastal ecosystems that makes a major contribution to the Indonesian economy. This marine plant is a potential food source and industrial raw materials that can be used to improve people's welfare as these marine macroalgae are widely distributed in Indonesian waters. This study was carried out because of its important role for the ecosystems and the economy of the country. The purpose of this research is to determine the community structure of this macroalgae in the waters of Tanjung Merah Village of Matuari District of Bitung City. The data were collected from January 2021 to March 2021 using a transect of 1 x 1 m2 which was placed along a 100 m line transect with 5 m intervals. The macroalgae found were 6 species consisting of 2 types of Chlorophyta class and 4 species of Rhodophyta class. The macroalgae diversity index of around is 1.06 categorized as moderate diversity; the index of dominant is 0.44 moderate and the evenness index is 1.79 or low.Keywords: Macroalgae; Community; Diversity.AbstrakRumput laut merupakkan komponen ekosistem wilayah pesisir yang memberikkan kontribusi yang besar bagi ekonomi Indonesia. Potensi sumberdaya hayati laut Sulawesi Utara, khususnya Kota Bitung yang cukup potensial untuk dapat dimanfaatkan sebagai sumber pangan dan bahan baku industri guna peningkatan kesejahteran masyarakatkarena makroalga termasuk salah satu sumberdaya hayati laut yang banyak terdapat di perairan Indonesia. Makroalga memiliki potensi besar untuk dikembangkan, karena memiliki peranan penting baik dari aspek ekologi dan memiliki nilai ekonomi.  Tujuan penelitian ini adalah untuk mengetahui struktur komunitas makroalga yang ada di perairan Kelurahan Tanjung Merah Kecamatan Matuari Kota Bitung. Penelitian ini dilaksanakan pada bulan Januari 2021 sampai Maret 2021. Data dikumpulkan dengan cara di sampling menggunakan kuadrat berukuran 1x 1 m2 yang diletakkan pada garis transek sepanjang 100 m dengan interval 5 m. Makroalga yang ditemukan 6 spesies yang terdiri atas Kelas Chlorophyta berjumlah 2 jenis, dan kelas Rhodophyta 4 jenis. Indeks keanekaragaman makroalga sekitar 1.06 dikategorikan sedang, indeks dominasi 0.44 dikategorikan rendah dan untuk indeks kemerataan 1,79 dikategorikkan rendah.Kata kunci: Makroalga; Komunitas; Keanekaragaman
Status of Coral Reefs in The Waters of Tidung Island Kepulauan Seribu DKI Jakarta Province Based on Underwater Photo Transect Analysis Fauzanabri, Renno; Manembu, Indri Shelovita; Schaduw, Joshian Nicolas William; Manengkey, Hermanto W. K; Sinjal, Chatrien A. L; Ngangi, Edwin L. A
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.9.2.2021.34902

Abstract

Tidung Island is one of the islands as well as a village located in the district of South Kepulauan Seribu. The purpose of this research is to measure the environmental parameters of the waters, provide information on the condition of coral reefs, and know the form of coral growth that dominates Tidung Island. Data retrieval is done using UPT (Underwater Photo Transect) method at a depth of 5 meters at three different stations. For the processing of data that has been taken, the photo results in the form of coral cover are entered into Coral point count with excel extensions (CPCe) 4.1 application and analyzed. The results of the analysis will be stored on the storage device, then the results will be ready to be opened in Excel format. The results of this research show that the environmental parameters of the waters include, including temperature, degree of acidity, and salinity, have a range of values that are still suitable for the growth and development of corals, however, the brightness level in these waters is relatively low. The condition of coral reefs in stations 1 and 3 are in the category of damage, with hard coral cover values of 24.67% and 11.00%, while at station 2 coral reef conditions are in the good category with a hard coral cover value of 56.27%. Based on the assessment, obtained an average value of the percentage of hard corals by 30.65%, this indicates that the condition of coral reefs in Tidung Island is in the moderate category. The low percentage of hard corals is caused by the high component of dead corals with algae and rubble. Based on the results of this research, a known form of coral growth that dominates the waters of Tidung Island is foliose coral.Keywords: Domination; CPCe; Tidung Island; Coral Reef; UPT.AbstrakPulau Tidung merupakan salah satu pulau sekaligus kelurahan yang terletak di wilayah Kecamatan Kepulauan Seribu Selatan. Tujuan dari penelitian ini adalah mengukur parameter lingkungan perairan, menyediakan data informasi kondisi terumbu karang, dan mengetahui bentuk pertumbuhan karang yang mendominasi di Pulau Tidung. Pengambilan data dilakukan dengan menggunakan metode UPT (Underwater Photo Transect) atau Transek Foto Bawah Air pada kedalaman 5 meter di tiga stasiun berbeda. Untuk pengolahan data yang sudah diambil, hasil foto berupa tutupan karang di input ke dalam aplikasi Coral point count with excel extensions (CPCe) 4.1 dan dianalisis. Hasil analisis akan tersimpan di perangkat penyimpanan, yang kemudian hasilnya akan siap untuk dibuka dalam format Excel. Hasil dari penelitian ini menunjukkan bahwa parameter lingkungan perairan meliputi, suhu, derajat keasaman, dan salinitas, memiliki kisaran nilai yang masih sesuai untuk pertumbuhan dan perkembangan karang, namun tingkat kecerahan pada perairan ini relatif rendah. Kondisi terumbu karang pada stasiun 1 dan 3 berada pada kategori buruk dengan nilai tutupan karang keras sebesar 24,67% dan 11,00%, sedangkan pada stasiun 2 kondisi terumbu karang berada pada kategori baik dengan nilai tutupan karang keras sebesar 56,27%. Berdasarkan penilaian tersebut, diperoleh nilai rata-rata persentase karang keras sebesar 30,65%, hal ini menunjukkan bahwa kondisi terumbu karang di Pulau Tidung berada pada kategori sedang. Rendahnya persentase karang keras disebabkan tingginya komponen karang mati oleh algae dan patahan karang. Berdasarkan hasil penelitian ini diketahui bentuk pertumbuhan karang yang mendominasi perairan Pulau Tidung adalah coral foliose.Kata kunci: Dominasi; CPCe; Pulau Tidung; Terumbu Karang; UPT
Gastropod Community On Seagrass Ecosystem in Makalisung coast Kaseger, Cindy; Lalita, Jans Djoike; Tilaar, Ferdinand Frans; Tombokan, John L.; Mandagi, Stephanus V.; Ngangi, Edwin L. A.
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.v9i2.34974

Abstract

The aim of the research is to know various species of gastropods and gastropod community structure through species density, percent density, dominant species, and association of species of gastropods on seagrass ecosystem. Research with the method of quadrat transect is put perpendicular to the coastline. Gastropod species are found in the seagrass ecosystem on the Makalisung coast consist of 9 species, 7 families, and 4 ordos. Gastropod community structure on seagrass ecosystem is found with species density is highest Cymbiola nivosa as big as 0.64 (ind/m2) with highest percent density 34.04 %. Diversity of species of gastropods on four-station that H’> 1 highest in fouth station as big as H’= 1.72. The dominance of species is highest Cymbiola nivosa as big as C=0.44, where the result of research in generally dominancy C < 0.25 belong to low. Association of species of gastropods on seagrass ecosystem found three characteristics, (1) classifying of positive association is Cypraea tigris and Monetaria annulus, Cypraea tigris and Cymbiola nivosa, Strombus labiatus and Cyclope pellucida, Strombus labiatus and Cymbiola nivosa, Monetaria annulus and Cerithiun nodulosum, Cymbiola nivosa and Cerithiun nodulosum; Cerithiu nodulosum and Angaria dephinus and Faunus ater. (2) Classification of not associated Angaria dephinus and association close to zero (0,04) is Monetaria annulus and Cymbiola nivosa. (3) Classifying of negative association based on the result of the research shows most of the negative pairs of gastropod species on seagrass ecosystem.Keywords: Gastropod; Density; Diversity; Dominance; AssociationAbstrakTujuan penelitian ini adalah mengetahui jenis-jenis Gastropoda dan struktur komunitas Gastropoda melalui Kepadatan spesies (Ind/m2), Kepadatan relatif (%), Dominansi spesies (C), dan asosiasi antarspesies Gastropoda pada ekosistem lamun. Penelitian dengan metode garis transek kuadrat yang ditempatkan tegaklurus garis pantai. Spesis gastropoda yang ditemukan di ekosism lamun pantai Makalisung, terdiri atas 9 spesies , 7 famili,  dan 4 ordo. Struktur komunitas gastropoda di ekosistem lamun ditemukan dengan kepadatan total spesis tertinggi pada Cymbiola nivosa sebesar 0,64 (ind/m2) dengan kepadatan relatif tertinggi 34,04 %; keanekaragaman spesis gastropoda keempat stasiun H’> 1 di mana tertinggi stasiun 4 sebesar H’= 1,72; dominansi total tertinggi adalah spesis Cymbiola nivosa sebesar C=0,44, di mana hasil penelitian secara umum dominansi C < 0,25 adalah tergolong rendah. Asosiasi spesis gastropoda di ekosistem lamun ditemukan tiga ciri, (1) klasifikasi golongan asosiasi positif adalahCypraea tigris dan Monetaria annulus,Cypraea tigris dan Cymbiola nivosa, Strombus labiatus dan Cyclope pellucida, Strombus labiatus dan Cymbiola nivosa, Monetaria annulus dan Cerithiun nodulosum, Cymbiola nivosa dan Cerithiun nodulosum; Cerithiu nodulosum dan Angaria dephinus dan Faunus ater. Klasifikasi golongan tidak berasosiasi (2) Angaria dephinus dan asosiasi mendekati zero (0,04) yaitu Monetaria annulus dan Cymbiola nivosa. Dan klasifikasi golongan asosiasi negatif, hasil penelitian sebagian besar menunjukkan asosiasi negatif pasangan spesis gastropoda di ekosistem lamun.Kata kunci : Gastropoda, Kepadatan, Diversitas, Dominansi, Asosiasi.
Development Of Marine Tourism Potential In East Likupang Waters, North Minahasa District Maryen, Yakob Oskar; Manembu, Indri Shelovita; Ngangi, Edwin L. A.; Roeroe, Kakaskasen Andreas; Sambali, Hariyani; Darwasito, Suria; 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.v12i2.52238

Abstract

This research aims to determine the potential for marine tourism in East Likupang Waters, determine the suitability of developing marine tourism in East Likupang Waters, and recommend marine tourism management, collecting primary data through observation and in-depth interviews directly with the community. Secondary data through studies of research results, scientific publications, the Minahasa Regency Maritime and Fisheries Service, and the North Minahasa Regency Maritime and Fisheries Service. Biophysical data is as follows. Observation of coral conditions using Line Intercept Transect (LIT). b) Observation of fish using Underwater Fish Visual Census (UVC). Water quality using a water quality checker (Horiba brand). Apart from that, data analysis uses a matrix of suitability for marine tourism areas, and beach tourism and provides weighting. The results of this research show that the potential that exists in East Likupang Waters and its surroundings includes physical and non-physical potential that has the potential and can be developed into a marine tourism attraction. Carrying capacity and beach recreation Surabaya Beach beach area 2000 (m²) 533 people/day Pulisan Beach 2000 (m²) 533 people/day c) Paal Beach 1000 (m²) 267 people/day Kalinaun Beach 3000 (m²) 800 people/day, It was found that the percentage of coral cover in East Likupang Waters was 47.04%, with a marine tourism suitability index value of 62, which means that the suitability of the East Likupang Waters marine tourism area is included in the conditionally appropriate criteria. Keywords: Potential, Marin Tourism, East Likupang Waters Abstrak Penelitian ini bertujuan untuk mengetahui potensi wisata bahari di Perairan Likupang Timur, mengetahui kesesuaian pengembangan wisata bahari di Perairan Likupan Timur dan merekomendasikan pengelolaan wisata bahari, pengumpulan data primer melalui observasi dan wawancara mendalam langsung kepada masyarakat. Data sekunder melalui kajian hasil penelitian, publikasi ilmiah, Dinas Kelautan dan Perikanan Kabupaten Minahasa, dan Dinas Kelautan dan Perikanan Kabupaten Minahasa Utara. Data biofisik adalah sebagai berikut. Pengamatan kondisi karang menggunakan Line Intercept Transect (LIT). b) Pengamatan ikan menggunakan Underwater Fish Visual Census (UVC). Kualitas air menggunakan alat pemeriksa kualitas air (merek Horiba). Selain itu analisis data menggunakan matriks kesesuaian kawasan wisata bahari, dan wisata pantai serta memberikan pembobotan. Hasil penelitian menunjukkan bahwa potensi yang ada di Perairan Likupang Timur dan sekitarnya meliputi potensi fisik dan non fisik yang mempunyai potensi dan dapat dikembangkan menjadi daya tarik wisata bahari. Daya dukung dan rekreasi pantai Pantai Surabaya Luas pantai 2000 (m²) 533 orang/hari Pantai Pulisan 2000 (m²) 533 orang/hari c) Pantai Paal 1000 (m²) 267 orang/hari Pantai Kalinaun 3000 (m²) 800 orang/hari, Diketahui persentase tutupan karang di Perairan Likupang Timur sebesar 47,04% dengan nilai indeks kesesuaian wisata bahari sebesar 62 yang berarti kesesuaian kawasan wisata bahari Perairan Likupang Timur termasuk dalam kriteria layak bersyarat. Kata Kunci: Potensi; wisata bahari; Perairan Likupang Timur.
Kultivasi rumput laut Caulerpa lentillifera menggunakan berat awal berbeda dengan metode rawai permukaan Mamesah, Jeivana F.T; Mudeng, Joppy D.; Ngangi, Edwin L. A.; Kreckhoff, Reni L.; Salindeho, Indra R.N.; Sambali, Hariyani; Mokolensang, Jeffrie F.
e-Journal BUDIDAYA PERAIRAN Vol. 13 No. 1 (2025): Jan - Juni
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/bdp.v13i1.60331

Abstract

The research purposes were to determine the best initial weight of Caulerpa lentillifera algae, determine the appropriate cultural operational depth for the best growth of C.lentillifera algae, and determine the interaction between the initial weight factor of C.lentillifera algae and the depth factor of growth. This research was carried out from May to July 2023. The C. lentillifera algae in this research were obtained from nature. C.lentillifera algae culture is carried out using the verticulture method, namely tying the algae to strings arranged in a row. This research was designed using a 3x3 factorial in a Completely Randomized Design (RAL). There are 2 factors tested in this experiment, each of which has 3 levels, namely: the weight factor of C. lentillifera algae which consists of: A1 = 50 grams, A2 = 100 grams and A3 = 150 grams, and the depth factor which consists of: B1 = 20 cm, B2 = 70 cm and B3 = 120 cm. The results obtained from this research are that differences in the growth of C. lentillifera algae are very significantly influenced by differences in the initial weight of different. The best absolute growth, relative growth, and daily growth rate were initial C. lentillifera algae weights of 50 grams, which respectively had the highest average values of 24.3 grams, 16.2%, and 1.4%. Differences in depth had no significant influence on differences in absolute growth, relative growth, and daily growth rate of the algae C. lentillifera. The results of variance analysis showed that the influence of the weight factor of C. lentillifera on absolute growth, relative growth, and daily growth rate did not change significantly when the depth factor level was changed. Keywords: verticulture; growth; initial weight; depth
Co-Authors Achmad, Febrio V. Adnan Wantasen Agus Gaghaube Ali Djamhuri Baring, Vira Bella, Sintia S. Billy Theodorus Wagey Carolus Paulus Paruntu Cyska Lumenta Dahlia Malau Darmono, Oktaviano P. Darwasito, Suria Dawaso, Agri Deiske Adeliene Sumilat, Deiske Adeliene Deysy M. Puansalaing Diany R.A Silalahi Edy, Selvanus Farnis B. Boneka Fauzanabri, Renno Ferdinand Frans Tilaar Gompi, Wiranto Grace O. Tambani Grevo S Gerung Handy Burase Hengky J. Sinjal, Hengky J. Henky Manoppo Henneke Pangkey Indra R. N. Salindeho Indra R.N. Salindeho Indri Manembu Ingrid Sembiring John L. Tombokan Johnny Budiman Joice R.T.S.L Rimper Joppy Mudeng Joshian N.W. Schaduw Karisoh, Yuriani S. Kaseger, Cindy Kepel, Rene Ch. Kreckhoff, Reni L. Kudato, Vania E. Kurniawan, Putra M. Kusen, Diane J. Kusen, Diane Joula Lalita, Jans Djoike Lano, Inayati H.G.M Lukas L.J.J Mondoringin Makapedua, Daisy M. Mamesah, Jeivana F.T Mandagi, Stephanus V. Mandagi, Stephanus Vianny Manengkey, Hermanto W. K Manoppo, Victoria E.N Markus T. Lasut Maryen, Yakob Oskar Mokolensang, Jeffrie F. Monijung, Revol D. Niti, Eukharistian Nurdin Jusuf, Nurdin Ockstan J. Kalesaran Pratasik, Gerald A. Rachim, M. Hatta Ramli A. Ismail, Ramli A. Reiny A. Tumbol Reiny A. Tumbol Robert J Rompas Robert Rompas Roeroe, Kakaskasen Andreas Rompas, Rizald M. Salindeho, Indra R. Sambali, Hariyani Sammy N. J. Longdong Sammy N. J. Longdong Sammy N.J. Longdong Saragih, Debby Dyanessa Silalahi, Torang J. P. Sinaga, Chintya R. Sinipirang, Frischa A. Sinjal, Chatrien A. L Sipriana S. Tumembouw Sondakh, Srie J. Suzanne L Undap Tarimakase, Yulianus Tilaar, Ferdinand F. Tindage, Tantri W. Tulung, Herol A. Usoh, Yosua Wihelmina Dimara Wilhelmina Patty Winda M. Mingkid Winda M. Mingkid, Winda M. Yanis Burdames