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Nutritional evaluation of groundnut oil cake in formulated diets forrohu, Labeo rohita (Hamilton) fingerlings after solid statefermentation with a tannase producing yeast, Pichia kudriavzevii(GU939629) isolated from fish gut

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De-oiled groundnut oil cake (GOC) was bio-processed through solid state fermentation (SSF) for 15 days at34 ± 1◦C by a tannase producing yeast, Pichia kudriavzevii (GU939629) isolated from the gut of a freshwa-ter carp, Cirrhinus cirrhosus. SSF of GOC was effective in significantly (P < 0.05) reducing crude fibre contentand antinutritional factors (e.g., tannin, phytic acid and trypsin inhibitor), whereas enhancing crude pro-tein, lipid, ash, total free amino acids and fatty acids. Bio-processing revealed significant increase in thelevels of argenine, histidine, isoleusine, lysine, methyonine and threonine in the GOC. Eight isonitroge-nous (37.5%) and isocaloric (18.8 kJ g−1) experimental diets were prepared incorporating raw (R1–R4)and fermented (F1–F4) GOC at 20%, 30%, 40% and 50% levels by weight replacing fishmeal and other feedingredients into a fishmeal-based reference diet (RD) and fed to rohu, Labeo rohita, fingerlings (initialweight 3.24 ± 0.11 g) for 80 days. In general, diets with SSF-processed GOC produced significantly betterperformance than the raw GOC in terms of growth, feed utilization, nutrient digestibility, carcass com-position and digestive enzyme activity. Rohu fingerlings fed the diet F3 containing 40% fermented GOCresulted in best performance in terms of weight gain (final weight 7.08 ± 0.06 g), specific growth rate (%day−1), protein efficiency ratio and apparent net protein utilization. Highest protein (14.93 ± 0.51%) andlipid deposition in the carcass were also recorded in the group of fish reared on diet F3. In comparison tothe FM based reference diet, the present study explored the possibility of replacing 45–55% of FM throughincorporation of 40–50% (w/w) SSF-processed GOC in the diets for rohu fingerlings.

Keywords:Groundnut oil cakeYeastSolid state fermentationFeed formulationGrowth performanceRohu fingerlingsa

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Informasi Detail

Judul Seri

Aquaculture Reports

No. Panggil

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Penerbit

: Elsevier Science Inc.., 2015

Deskripsi Fisik

Aquaculture Reports 2 (2015) 82–90

Bahasa

English

ISBN/ISSN

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Klasifikasi

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Tipe Isi

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Tipe Media

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Tipe Pembawa

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Edisi

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Subjek

KIMIA

Info Detail Spesifik

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Pernyataan Tanggungjawab

Wati/Agus

Versi lain/terkait

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