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Effect of Feeding Frequency on the Growth and Production Performance of Monosex Tilapia

M.E. Ahsan
Department of Fisheries Management, Bangladesh Agricultural University

M.R. Haque
Department of Fisheries Management, HSTU, Dinajpur

M.A. Hossain
Department of Fisheries Management, HSTU, Dinajpur

M.S. Islam
Dept. of Fisheries, DU

M.S. Sultana
IDE-Bangladesh, Rangpur

M.M. Khan
BFRI, Freshwater station, Mymensingh

Abstract/ Executive Summary:

A field experiment was conducted to study the effect of feeding frequency on the growth and production performance of Monosex tilapia (Oreochromis niloticus L.) in pond condition under three treatments each with three replications for a period of 40 days. A stocking density of 200 fish per decimal was used for the experiment and three feeding frequencies i.e. once daily (T₁), twice daily (T₂) and thrice daily (T₃) were used. The fish were fed @ 8 to 5% of their body weight throughout the study period. The water quality parameters were monitored at ten days intervals and they were more or less similar in three treatments and remained within the suitable ranges for Tilapia culture. The significantly (P<0.05) higher mean weight gain and specific growth rate (SGR) were recorded in treatment T₃. The survival rate was high (94-95%) in each treatment. The food conversion ratio (FCR) was significantly (P<0.05) lower in T₃ (1.65) than that of T₁ and T₂. The highest production of fish was observed in T₃ (2669kg/acre/40 days), which was significantly higher than that of other treatments and the result of the present study indicated that feeding frequency has direct effect on the growth and production of Monosex Tilapia (O. niloticus) under pond condition.

Keywords: FCR, Feeding Frequency, Monosex Tilapia, Production and SGR

Location: Faculty of Fisheries, Bangladesh Agricultural University, Mymensingh

Start Date: 30-06-2008

End Date: 08-08-2008

Program Area: Animal Health and Management

Commodity: Tilapia

Objectives:

1. To determine the effect of feeding frequency on the growth and production performance of Monosex Tilapia, determine the water quality, and profit margin.

Methodology:

The experiment was conducted in 9 earthen ponds situated in the Faculty of Fisheries, Bangladesh Agricultural University, Mymensingh for a period of 40 days commencing from 30 June to 8 August, 2008. Aquatic weeds were removed manually from the ponds. Complete eradication of all undesirable fish, insects and other aquatic live forms were done by using Phostoxin tablet. One week after this, lime was administrated @ 1 kg per decimal. Seven days after liming, the ponds were fertilized with cow dung, urea and triple super phosphate (TSP) @ 3 kg, 100g and 75g per decimal respectively. Ponds were divided into three treatments viz. T₁, T₂ and T₃ each having three replicates for feeding fish once a day, twice a day and thrice a day, respectively. The experimental design was conducted by Completely Randomized Design (CRD) process. The Monosex Tilapia fry were stocked @ 200/decimal for each treatment and the fish were initially fed @ 8% of their body weight and was reduced gradually to 5% of their body weight. Reducing of ration size was performed by 1% in each 10 days interval. The fish were fed thrice daily at 8 am in the morning at 12.30 pm in the noon and 5 pm in the afternoon in case of T₃. Where as in case of T₁ feed was supplied once at 8 am and in case of T₂ feed was supplied twice at 8 am and 5 pm. Pelleted feed (Starter III, Quality Feed) was broadcasted in a fixed corner of each pond. Three major water quality parameters such as temperature, dissolved oxygen and pH were measured and recorded weekly throughout the experimental period at 9 am by using a commercial kit box (Model: FF-3, USA). Growth and production of fishes were measured by sampling at an interval of 10 days by using a digital electronic balance KERN, Model No. EMB 2000-0 and were evaluated by Weight gain= mean final fish weight- mean initial weight, Specific Growth Rate (SGR, % per day), Survival rate (%) , Production, and Food Conversion Ratio (FCR).

Source of Information: J. Agrofor. Environ. 3 (1): 183-186, 2009; ISSN 1995-6983

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

A stocking density of 200 fish per decimal was used for the experiment and three feeding frequencies i.e. once daily (T₁), twice daily (T₂) and thrice daily (T₃₎ were used. The fish were fed @ 8 to 5% of their body weight throughout the study period. The water quality parameters were monitored at ten days intervals and they were more or less similar in three treatments and remained within the suitable ranges for Tilapia culture. The significantly (P<0.05) higher mean weight gain and specific growth rate (SGR) were recorded in treatment T₃. The survival rate was high (94-95%) in each treatment. The food conversion ratio (FCR) was significantly (P<0.05) lower in T₃ (1.65) than that of T₁and T₂. The highest production of fish was observed in T₃ (2669kg/acre/40 days), which was significantly higher than that of other treatments and the result of the present study indicated that feeding frequency has direct effect on the growth and production of Monosex Tilapia (O. niloticus) under pond condition.

Knowledge Management: Journal