Siti Aslamsyah
Jurusan Perikanan Fakultas Ilmu Kelautan dan Perikanan, Universitas Hasanuddin

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Improvement of the nutritional value and growth of rotifer (Brachionus plicatilis) by different enrichment period with Bacillus sp.

Jurnal Akuakultur Indonesia Vol 10, No 1 (2011): Jurnal Akuakultur Indonesia
Publisher : Jurnal Akuakultur Indonesia

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Abstract

Brachionus plicatilis is a widely used as natural feed in hatchery. Characteristics of rotifers as biocapsule can improve the quality of rotifers in a practical way. Bacillus sp. is capable of improving the nutrition rotifers to produce vitamins, food detoxication or through enzymatic activity such as protease, lipase, and amylase. This research aimed at observing the influence of the enrichment length of Bacillus sp. on the quality of nutrition and growth of rotifers. The research container was a polyearbonate vessel of one ton volume which contained Nannochloropsis sp. with the density of 105 cell/mL, it was then scattered with rotifer with the density of 1,000 ind./mL. The types of bacteria used were Bacillus subtilis, B. pumilus and B. licheformis with the density of 2x1010 cfu/g. The experiments tried with different enrichment length were A = 0 hour, B = 5 hours, C = 10 hours and D = 10 hours with triplicate. As the comparing data, rotifer culture experiment was carried out with Nannochlorophsis sp.as the control. The number of containers were 24 which consists of 12 for threatment and 12 pieces as control. Variables measured were proximate to each treatment and the growth of rotifers. The result of the research revealed the enrichment length of rotifers with Bacillus sp. has significantly (P

PENGARUH LEVEL KARBOHIDRAT DAN FREKUENSI PAKAN TERHADAP RASIO KONVERSI PAKAN DAN SINTASAN JUVENIL Litopenaeus vannamei

Jurnal Perikanan Universitas Gadjah Mada Vol 16, No 1 (2014)
Publisher : Universitas Gadjah Mada

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Abstract

This study aims to determine the level of carbohydrates and feeding frequency on feed convertion ratio and survival of shrimp vanamei juvenile. Research using completely randomized design by factorial patern with two factors and three replications. Treatments were factor A (carbohydrate levels, namely 18, 32, 40 and 50%), and factor B (frequency of feeding 2, 4 and 6 times per day). Shrimp vanamei which was used have an average weight of 0.3 g per individual. Feed dose was 10% of the body weight of shrimp with the feeding frequency adapted to the treatment. The results showed that the factor levels of carbohydrate feeding, feeding frequency and the combination of both give a signifi cant effect on feed convertion ratio of shrimp vanamei juvenile with the best combination of 50% carbohydrate level and feeding frequency 6 times per day. Treatment levels of carbohydrates, feeding frequency and combination of both give no signifi cant effect on survival of shrimp vanamei juvenile.