Sains Malaysiana 42(8)(2013): 1109–1114

Rice Bran Replacement in Clarias gariepinus Fingerlings Diets with Pleurotus floridaStalk

(Penggantian Dedak Padi dalam Diet Anak Ikan Keli dengan Menggunakan Batang Cendawan)

Hasniyati Muin, Nurul Nadwa Abdul Fatah*, Mohd Hakimi Mohd Nor & Shaharudin Abdul Razak

AquaNutriBiotech Laboratory, Institute of Biological Sciences, Faculty of Science

University of Malaya, 50603 Kuala Lumpur, Malaysia

Received: 11 May 2012 /Accepted: 25 January 2013

ABSTRACT

The effect of replacement of ricebran by mushroom stalk (Pleurotus florida), an agriculture waste on growth performance of African catfish (Clarias gariepinus) fingerlings was investigated for 42 days. Three isonitrogenous (32% crude protein) experimental diets containing 100% (Diet 1), 50% (Diet 2) and 0% (Diet 3) mushroom meal were formulated. Each diet was randomly allocated to triplicate groups of fingerlings in experimental tanks, with each tank stocking 12 fishes. The fishes were fed twice daily to apparent satiation for 6 weeks. Good survival rates were obtained from fish fed with Diet 1 (94%) and Diet 3 (94%). There was no significant differences in body weight gain (BWG), specific growth rate (SGR) and feed conversion ratio (FCR) among all diets (p>0.05). The fish fed with Diet 1 showed the best BWG, SGR, FCR and PER compared with Diet 2 and Diet 3. An economic evaluation indicated that Diet 1 gave the lowest production cost at RM2.03/kg followed by Diet 2 and Diet 3 at RM2.18/kg and RM2.38/kg, respectively. This study showed that the best diet was Diet 1 with 100% replacement of rice bran with mushroom stalks costing RM2.03/kg, the cheapest among the three diets.

Keywords: Carbohydrate; Clarias gariepinus; feed utilization; growth performances; Pleurotus florida

ABSTRAK

Kajian ini dijalankan untuk mengkaji kesan penggantian dedak padi dengan tangkai cendawan (Pleurotus florida) yang merupakan bahan buangan agrikultur terhadap prestasi tumbesaran ikan keli (Clarias gariepinus) selama 42 hari. Tiga isonitrogen diet (32% protein kasar) iaitu Diet 1, Diet 2 dan Diet 3 dengan masing-masing mengandungi 100%, 50% dan 0% cendawan yang diformulasikan. Setiap diet dijalankan secara 3 replikasi dengan 12 ekor ikan telah diagihkan ke dalam setiap tangki eksperimen secara rawak. Ikan diberi makan dua kali sehari selama 6 minggu. Kadar kelangsungan hidup terbaik ditunjukkan oleh ikan yang diberi makan Diet 1 dan Diet 3 iaitu 94%. Tiada perbezaan signifikan diperhatikan dalam BWG, SGR dan FCR bagi kesemua diet (p>0.05). Ikan keli yang diberi makan Diet 1 menunjukkan BWG, SGR, FCR dan PER terbaik berbanding Diet 2 dan Diet 3. Anggaran kos menunjukkan Diet 1 paling murah iaitu RM2.03/kg diikuti oleh Diet 2 dan Diet 3 dengan masing-masing RM2.18/kg dan RM2.38/kg. Hasil kajian menunjukkan Diet 1 yang mengandungi 100% penggantian sekam padi adalah yang terbaik dan termurah dengan harga RM2.03/kg antara ketiga-tiga diet.

Kata kunci: Clarias gariepinus; karbohidrat; penggunaan nutrisi makanan; Pleurotus florida; prestasi tumbesaran

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*Corresponding author; email: awdanadwa@gmail.com