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Rajagukguk, Bulfrit B.
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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
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
Co-Authors Cyska Lumenta Kambey, Rama Presley Mokolensang, Jeffrie F. Opa, Samuel Leivy Pamikiran, Vivi Aganitji Rumengan, Roles Sumolang , Cakra Sigar