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All Journal e-Journal BUDIDAYA PERAIRAN JURNAL PESISIR DAN LAUT TROPIS JURNAL ILMIAH PLATAX Albacore : Jurnal Penelitian Perikanan Laut
Rajagukguk, Bulfrit B.
Unknown Affiliation
Agriculture, Biological Sciences & Forestry Humanities Earth & Planetary Sciences Environmental Science

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Pemanfaatan ragi (Saccharomyces cerevisiae) pada formulasi pakan dalam meningkatkan pertumbuhan ikan Nila (Oreochromis niloticus) Rajagukguk, Bulfrit B.; Lumenta, Cyska; Mokolensang, Jeffrie F.
e-Journal BUDIDAYA PERAIRAN Vol 5, No 3 (2017)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/bdp.5.3.2017.17887

Abstract

The purpose of this research was to determine the effect of yeast (Saccharomyces cerevisiae) with different composition of 5%, 10%, 15%, 20%, and without yeast in feed formulation on growth of tilapia (Oreochromis niloticus). The experimental fish used in this study had an average lengths of 2-3 cm  and weight of 1.0 g.  This research used cage measuring 100 x 100 x 100 cm3 that was placed in outdoor concrete pond of 3.5 x 5 m2.  Each cage filled with 10 fishes with three replication.  The dose given to the fish was 10% of the weight of biomass.  The fish was fed for three weeks, 3 times a day at 08.00 am, 12.00 pm, and 16.00 pm.. Research results showed that the greatest growth was achieved in fish treated 20% yeast and the lowest was observed in control fish (without yeast). Based on statistical analysis, all treatment displayed similar effect on all growth parameters.Keywords: Fish feed, Saccharomyces cerevisiae, yeast, Nile tilapia, fish growth
Banggai Cardinalfish (Pterapogon kauderni) Potential As Bioaccumulator Of Tributyltin Contamination In The Waters Of Bitung Bulfrit Berstian Rajagukguk; Nego E. Bataragoa; Inneke F. M. Rumengan; Wilmy E. Pelle; Suria Darwisito; Deiske A. Sumilat
Jurnal Ilmiah PLATAX Vol. 8 No. 2 (2020): ISSUE JULY-DECEMBER 2020
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jip.8.2.2020.29713

Abstract

At this time there have been no nekton organisms used as a bioaccumulator of the Tributyltin (TBT) pollution and mercury in tropical waters. This research aims to assess the concentration of TBT and mercury in the Pterapogon kauderni, sediment, and water in the waters of Bitung also suspect the factors that are the cause of pollution of TBT and mercury against P. Kauderni, sediment, and water in the waters of Bitung.  The concentration of TBT compounds on all samples analyzed using the Gas Chromatography-Mass Spectrometer (GC-MS) tool. The results of the analysis showed that the high concentration of TBT was found in sediment (0.22 – 6.98 μg/g w.w) compared with fish ranging from 0,003-0,066 μg/g and seawater < 0.0005 μg/g (below detection of TBT limit analysis). TBT interceptions in the waters of Bitung come from a port activity and sea transportation.Keywords: Pterapogon kauderni, TributyltinAbstrakPada saat ini belum ada organisme nekton yang digunakan sebagai bioakumulator pencemaran Tributyltin (TBT) di perairan tropis. Penelitian ini bertujuan untuk menilai konsentrasi TBT pada Pterapogon kauderni, sedimen, dan air di perairan Bitung juga menduga faktor-faktor yang menjadi penyebab pencemaran TBT terhadap P. kauderni, sedimen, dan air di perairan Bitung. Konsentrasi senyawa TBT pada semua sampel dianalisis mengunakan alat Gas Chromatografy-Mass Spectrometer (GC-MS). Hasil analisis menunjukan bahwa konsentrasi TBT paling tinggi terdapat pada sedimen (0,22 – 6,98 µg/g w.w) dibandingkan dengan ikan yang berkisar 0,003-0,066 µg/g dan air laut <0,0005 µg/g (dibawah deteksi limit analisis TBT). Pencemaran TBT yang terdapat di perairan Bitung berasal dari aktivitas pelabuhan dan transportasi laut.Kata kunci: Pterapogon kauderni, Tributyltin.
KOMPOSISI DAN KEPADATAN SAMPAH LAUT PADA TIGA BAGIAN DARI PANTAI MANGATASIK KECAMATAN TOMBARIRI KABUPATEN MINAHASA Samuel L. Opa; Rama P. Kambey; Roles R. Rumengan; Bulfrit B. Rajagukguk; Vivi A. Pamikiran
JURNAL PESISIR DAN LAUT TROPIS Vol. 11 No. 3 (2023): JURNAL PESISIR DAN LAUT TROPIS
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jplt.11.3.2023.54253

Abstract

Marine debris is solid material from anthropogenic activities which then ends up in the coastal and marine environment. Mangatasik Beach is a tourist attraction that is often visited by visitors to enjoy the beauty of nature and beautiful scenery, these tourism activities along with other human and natural activities are thought to be a source of marine debris. This study aims to determine the composition and density of meso and macro marine debris in Mangatasik Beach in three areas, namely the upper, middle and lower parts of the beach. Three observation transects with one replicate were stretched 50 m long and 2 m wide. There were nine types of marine debris materials consisting of plastic, plastic foam, cloth, rubber, metal, glass and ceramics, paper and cardboard, wood, and other materials. The total weight of meso debris was found to be 360.80 g and macro debris was found to be 11,097 g. The heaviest meso debris composition was found at the upper part by the plastic foam material type at 46.62% (53.85 g). The heaviest composition of macro debris was found at the lower part by other types of materials by 60.28% (1,232.80 g). The highest meso debris density in the upper part with the type of plastic foam material with a value of 0.280 items/ m2, as well as from the upper part also the highest macro debris density was obtained with the type of plastic material at a value of 0.820 items/ m2.Keywords: Marine Debris, Composition, Density, Mangatasik Beach ABSTRAKSampah laut merupakan material padat dari kegiatan antropogenik yang kemudian berakhir di pesisir dan lingkungan laut. Pantai Mangatasik merupakan objek wisata yang sering dikunjungi oleh pengunjung untuk menikmati keindahan alam dan pemandangan yang asri, aktivitas wisata tersebut bersama aktivitas manusia dan alam lainnya diduga menjadi sumber sampah laut. Penelitian ini bertujuan melihat komposisi dan kepadatan sampah laut meso dan makro di Pantai Mangatasik pada tiga area, yaitu bagian atas, tengah, dan bawah dari pantai. Tiga transek pengamatan dengan satu ulangan dibentangkan sepanjang 50 m dan lebar 2 m. Terdapat sembilan jenis bahan sampah laut terdiri atas plastik, busa plastik, kain, karet, logam, kaca dan keramik, kertas dan kardus, kayu, dan bahan lainnya. Total berat sampah meso didapatkan sebanyak 360,80 gr dan sampah makro didapatkan sebanyak 11.097 gr. Komposisi sampah meso paling berat terdapat pada bagian atas oleh jenis bahan busa plastik sebesar 46,62% (53,85 gr). Komposisi sampah makro yang paling berat terdapat pada bagian bawah oleh jenis bahan lainnya sebesar 60,28% (1.232,80 gr). Kepadatan sampah meso tertinggi di bagian atas dengan jenis bahan busa plastik dengan nilai 0,280 item/m2, begitu pula dari bagian atas juga kepadatan sampah makro tertinggi didapatkan dengan jenis bahan plastik pada nilai 0,820 item/m2.Kata Kunci: Sampah Laut, Komposisi, Kepadatan, Pantai Mangatasik
Inventarisasi dan identifikasi makroalga di Perairan Talawaan Bajo, Sulawesi Utara Rajagukguk, Bulfrit B.; Kambey, Rama Presley; Opa, Samuel Leivy; Pamikiran, Vivi Aganitji; Rumengan, Roles; Sumolang , Cakra Sigar
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.v11i2.49847

Abstract

Macroalgae have ecological and economic benefits both directly and indirectly, so they have great potential to be developed. This study aimed to determine the types, abundance and diversity of macroalgae in the coastal waters of Talawaan Bajo. Sampling used the line transect method with a quadratic sampling technique. The data that had been collected was analyzed used descriptive statistical analysis. There were 21 species of macroalgae consisted of Chlorophyta six species (29%), Rhodophyta twelve species (57%), and Phaeophyta three species (14%). The highest density was found in the class Rhodophyta. There were no dominating species and the uniformity value was high and in stable condition. The diversity index was classified as moderate. Research result showed that environmental factors in Talawaan Bajo Waters were favorable for macroalgae growth. Keywords: Structure community, Rhodophyta, Chlorophyta, Phaeophyta, biodiversity
RELATIONSHIP ANALYSIS BETWEEN CRAB CARAPACE WIDTH AND WEIGHT CAUGHT USING FOLDING TRAPS IN GEBANG MEKAR WATERS Jhohan; Riyanto, Mochammad; Tapilatu, Maryrose Easter; Bahtiar, Sadida Anindya; Rajagukguk, Bulfrit B.; Sasarari, Rosmina; Soradatu, Syeiqido
Jurnal Penelitian Perikanan Laut (Albacore) Vol 9 No 4 (2025): Albacore
Publisher : Departemen PSP IPB

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/core.9.4.619-631

Abstract

The blue swimming crab (Portunus pelagicus) is a high economic importance marine species and serves as a primary target for local fisheries employing collapsible traps in Gebang Mekar, Cirebon Regency waters. This study aimed to examine the sex ratio and growth pattern based on variations in carapace width and body weight of crabs captured in the area. Fieldwork was conducted from April to May 2023 in Gebang Mekar Village. Data collection involved measuring the carapace width and body weight of crabs obtained from 30 fishing trips. A total of 2,191 individuals were recorded, comprising 638 males (29.2%) and 1,553 females (70.8%), resulting in a male-to-female ratio of 1:2.4. Carapace width ranged from 6 to 16 cm, while body weight varied between 21 to 338 grams. The analysis of the width-weight relationship yielded a regression coefficient (b) of 2.923, indicating a negative allometric growth pattern, where carapace width increases faster than body weight. The results also demonstrated a positive correlation between carapace width and body weight, suggesting that larger individuals tend to be heavier. Key words: blue swimming crab, carapace width and weight, sex ratio
Co-Authors Bahtiar, Sadida Anindya Cyska Lumenta Deiske A. Sumilat Inneke F. M. Rumengan Jhohan Kambey, Rama Presley Mochammad Riyanto Mokolensang, Jeffrie F. Nego E. Bataragoa Opa, Samuel Leivy Pamikiran, Vivi Aganitji Rama P. Kambey Roles R. Rumengan Rumengan, Roles Samuel L. Opa Sasarari, Rosmina Soradatu, Syeiqido Sumolang , Cakra Sigar Suria Darwisito Tapilatu, Maryrose Easter Vivi A. Pamikiran Wilmy E. Pelle