Growth Response of Nile Tilapia (&amp;lt;i&amp;gt;Oreochromis niloticus&amp;lt;/i&amp;gt;) Fries Fed on Silage-based Diets

Bezuayehu Gutema Asefa,Fikadu Hailemichael Tsige,Abelneh Yimer Melaku

doi:10.11648/j.ijsqa.20210701.15

Growth Response of Nile Tilapia (&lt;i&gt;Oreochromis niloticus&lt;/i&gt;) Fries Fed on Silage-based Diets

Bezuayehu Gutema Asefa, Fikadu Hailemichael Tsige + Show 1 more

Open Access

https://doi.org/10.11648/j.ijsqa.20210701.15

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Abstract

Fish silage was prepared using minced fish body leftovers by adding formic acid and formulated with other plant source ingredients. The silage making process was completed after 48 days, and incorporated into the experimental diets. The growth trial was conducted to investigate the effect of silage incorporation in the diets of Nile tilapia (Oreochromis niloticus L.) fries. Three dried diets containing (T1) 0%, (T2) 20% and (T3) 30% silage were prepared with 30% crude protein and the experiment was conducted in 12 glass aquaria with a stocking density of 30 fish/aquarium for 16 weeks. Results indicated that WG, FCR, and SGR of O. niloticus fries fed on T2 and T3 diets were not affected (p<0.05) by the difference in feed. The least growth performance was recorded in T1 and it was significantly different (P < 0.05) with T2 and T3. The fries fed on silage incorporation showed the best survival rate (100%) but the fries that fed without silage had less survival rate (83.3%). This indicates fish silage can be used as a feed for O.niloticus at an early stage. Under the present study condition, incorporation of fish silage at 20% inclusion in the diets of O. niloticus fries is better and further study is necessary for different inclusions.

Highlights

Aquaculture is one of the fastest growing food producing sector in the world and has succeeded as a major contributor to poverty mitigation, food security and income generation
These parameters were within the acceptable levels required for normal growth and physiological activities of Nile tilapia [15, 16]
The lowest growth response was in T1, which was no silage incorporation

Summary

Introduction

Aquaculture is one of the fastest growing food producing sector in the world and has succeeded as a major contributor to poverty mitigation, food security and income generation. Aquaculture is an important domestic supplier of greatly desired, high quality, animal protein, generally at prices reasonable to the poorer segments of society. It is considerable source of occupation, cash income and foreign exchange, with developing countries contributing over 90% of the total global production [1]. Lack of reasonably priced and locally available quality fish feed are the major factors. Since feed costs represent 40-50% of the total variable production costs [4], locally produced and reasonably priced feedstuff of sufficient nutritional quality is a key element in the development of aquaculture in countries like Ethiopia [5]. Because feed management determines the viability of aquaculture as it accounts for at least 40 - 60% of the cost of fish production [4, 6]

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