Abstract
A 4-week long feeding experiment was conducted to evaluate the effect of different protein levels of quality Tilapia (O. niloticus) fry production in Agro-3 Fish Hatchery and Culture Farm, Boilor, Trishal, Mymensingh. Four days old 1247 fry (length 0.8 cm and weight 0.012 g) were stocked at the density of 1560/m2 in twelve synthetic hapas. Four different treatments (T1, T2, T3 and T4) in three replications were used having different level of protein containing diets (T1,=35.95%, T2=40.43%, T3=45.61% and T4=50.85%) in the experiment. Feeds were supplied to fry at 4 h intervals during 24 h cycle upto satiation level. Sampling was done at 7 days interval throughout the experiment. The best growth was obtained at 35.95% protein level in T1 treatment. Therefore, a follow up second experiment with feeds having protein levels 30.12%, 33.42%, 36.19% and 39.01% encircling the best performed diet (35.95% protein) of the first experiment was conducted. Significantly (P<0.05) higher mean weight gain (g), SGR (%/day), PER, survival rate (%) and lower FCR value were found at 36.19% protein containing diet. Thus, from the results of the two experiments conducted in two consecutive years it can be said that the feed containing approximately 36% protein is the best for the production of quality tilapia fry. If farmers use 36% protein instead of 40% then it will be more economic because fish meal is costly. Further experiment can be carried with feed containing 36% protein from cheaper ingredients other than fish meal to reduce the feed cost. DOI: http://dx.doi.org/10.3329/jbau.v9i2.11053 J. Bangladesh Agril. Univ. 9(2): 359364, 2011
Highlights
Nile Tilapia has been introduced in our country because of its high market demand and growth performance
An experiment was conducted in a selected private farm called Agro-3 “Fish Hatchery and Culture Farm” located at Boilor under Trishal upazila in Mymensingh district for production of quality Tilapia (O. niloticus) fry for a period of 28 days from 25th August to 22nd September, 2010
The water temperature monitored during the study period in the experimental hapas was 26.5 to 32°C i.e. within the suitable range
Summary
Nile Tilapia has been introduced in our country because of its high market demand and growth performance. It can be cultured in almost any type of water bodies. It grows to marketable size within short period of time and its survivality is very high. The dietary protein requirement for fish fry is high and ranges from 35% to 56% (Jauncy and Ross, 1982). The present study was undertaken to conduct experiment with different protein level diets viz 35%, 40%, 45%, and 50% protein of fry feed to determine growth performance and survival rate of tilapia fry at different protein levels
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