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Nutritive Value of Three Commercial Fish Feeds and Their Effects on the Growth of Tilapia (oreochromis Niloticus) Fry

R. Akter
Department of Aquaculture, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh.

Abstract/ Executive Summary:

From proximate composition the protein content of Quality feed, Mega feed and National feed were 34.52%, 34.84% and 24.01%, respectively and their company provided value were 36%, 35% and 25%, respectively. The lipid content of Quality feed (7.5%) and National feed (10.08%) from analysis were little bit higher than company provided value 7% and 10%, respectively. In Mega feed there were great difference in lipid content in analyzed (7.39%) and company provided value (3%). After doing proximate analysis the feeding experiment was done with 4 days old tilapia (GIFT strain, O. niloticus) fry for a period of 28 days to determine the effect of these feed on growth and survival of tilapia fry in synthetic hapa in pond. Growth of tilapia fry under treatment T₂ in terms of both length and weight were significantly (p<0.01) higher than those with other treatments. T₃ showed significantly (p<0.01) lowest growth performance among the three treatments. The highest survival rate (90.28%) was obtained with treatment T₂. Comparatively better growth and survival rate of fry were obtained with Mega feed. From the result of both nutritive value and growth performance Mega feed can be the recommended for the growth and production of tilapia fry.

Keywords: Commercial fish feed, Growth performance, Nutritive value, Tilapia fry

Location: Mymensingh

Start Date: 09-07-2011

End Date: 06-08-2011

Program Area: Animal Health and Management

Commodity: Tilapia

Objectives:

To assess and compare the nutritive value of three commercial fish feed and their effect on the growth of Nile tilapia fry.

Methodology:

The experiment was conducted in a private farm named “Authentic Hatchery” located at Sikarikanda under sadar upazila in Mymensingh district for a period of 28 days from 9^th July to 6^thAugust, 2011. Proximate composition of these feed were analyzed following the standard methods given by Association of Official Analytical Chemists (AOAC, 2000) at the Fish Nutrition Laboratory in the Department of Aquaculture, Faculty of Fisheries, Bangladesh Agricultural University (BAU), Mymensingh. The experiment was designed into three treatment groups (T₁, T₂, T₃) fed with three different diets each having two replications. Fry were acclimatized with the experimental pond water in plastic bowl and then stocked in the hapa. Three different feed Quality feed (T₁), Mega feed (T₂) and National feed (T₃) were supplied four times a day. Sampling was carried out at an interval of 7 days where fry were caught by a scoop net and kept in a bowl with water. Total length and weight were recorded by using a scale and analytical balance. After recording the length and weight the fry were released in the respective hapa and growth performances were calculated as:

Length gain (cm) = Mean final length – Mean initial length

Weight gain (g) = Mean final weight – Mean initial weight

Specific growth rate (SGR% per day) = (Brown, 1957)

Where, W₂ = Final live body weight (g) at time T₂

W₁ = Final live body weight (g) at time T₁

Survival rate = ×100

The data obtained during experiment were analyzed by one way ANOVA to see whether the effect of different commercial feeds on the growth and survival of fish fry were significant or not. Mean separation was done by least significant difference (lsd) at 1% probability level (Zar, 2010).

Source of Information: J. Patuakhali Sci. and Tech. Univ. 2013, 4(2): 29-35

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

In the present study, best result in terms of growth was observed in treatment T₂ receiving Mega feed. Moreover survival of tilapia fry in this feed was acceptable. An artificial feed like Mega feed is available throughout the year in the study area. Thus, this feed could be considered as a recommended feed for large scale production of tilapia fry. Sometimes farmers use low quality feed of some feed companies which result in low growth and production of fishes. Feed mills should maintain feed quality as they advertise. The present research work might be helpful for determining the quality feed and low quality feed of feed companies and by this findings farmer can be benefited to select proper nutritious feed for higher production.

Knowledge Management: Journal