EFFECTS OF REPLACEMENT OF SOYA BEAN (GLYCINE MAX. LINN) MEAL WITH SOYA BEAN OFFAL MEAL IN THE DIET OF NILE TILAPIA OREOCHROMIS NILOTICUS (LINNAEUS, 1758) FINGERLINGS
EFFECTS OF REPLACEMENT OF SOYA BEAN (GLYCINE MAX. LINN) MEAL WITH SOYA BEAN OFFAL MEAL IN THE DIET OF NILE TILAPIA OREOCHROMIS NILOTICUS (LINNAEUS, 1758) FINGERLINGS
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Date
2020-03
Authors
SULEIMAN, Mustapha
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Abstract
The study was conducted to investigate the effect of replacing soya bean meal with soya bean
offal meal in the diet of Nile tilapia O. niloticus fingerlings and to determine its growth
performance. Fifteen (15) plastic rearing tanks (30cm x 45cm x 35cm depth) were used for the
experiment. Plastic rearing tanks were randomly assigned in three replicates to five treatments.
Three hundreds (300) fingerlings of O. niloticus of mixed sexes and sizes of initial mean weight
of (6.0±2.04a g) were stocked in fifteen (15) white rectangular plastic tanks of water holding
capacity of 50 litres (30cm x 45cm and 35cm depth) with twenty (20) fingerlings per tank and
water maintained at 40 litres level for a period of twelve (12) weeks. Soya bean Offal meal
(SBOFFM) was used to replace Soya bean meal (SBM) at inclusion levels of 0%, 25%, 50%,
75% and 100% for Diet 1 to 5 respectively. T1- 24.82±0.72b CP, T2- 25.34±1.93a CP, T3-
24.75±1.01b CP, T4- 24.21± 0.43b CP and T5- 25.12±0.70a CP. Total growing period was 97
days (14 days of acclimatization and 83 days of feeding). The results obtained showed T2
(25.34±1.93a) (25%) inclusion Soya bean Offal had the highest Mean Weight Gain (MWG) of
(21.97±4.29a g), Mean Length Gain (MLG) of (1.76±0.23a cm), Protein Efficiency Ratio (PER)
of 0.867±0.5a g, Net Protein Utilization (NPU) of 150.35± 0.2a %, Feed Efficiency Ratio (FER)
of 1.89±0.4a, Gross Feed Conversion Efficiency (GFCE) of 200.00±0.4a and crude protein of
O. niltocus carcass (38.1±0.20a g/100g DM). Feed Conversion Ratio (FCR) and Specific Growth
Rate showed no significant difference (P≥0.05). Also, pH (1-12), Temperature (T°C), Dissolved
Oxygen (DO) (mg/l), Electrical Conductivity (μ/S), and Total Dissolve Solute (TDS) (mg/l)
showed no significant difference (P ≥0.05). The study results demonstrate that soybean offal
meal could replace the soya bean meal in the diet of Nile tilapia without negative effects on growth, or on total production and even leading to high net economic returns as shown in the
diets with 25% CP crude protein from plant source.
Description
A DISSERTATION SUBMITTED TO THE SCHOOL OF POSTGRADUATE STUDIES
AHMADU BELLO UNIVERSITY IN PARTIAL FULFILLMENT OF THE
REQUIREMENTS FOR THE AWARD
OF A MASTER OF SCIENCE DEGREE IN FISHERIES
DEPARTMENT OF BIOLOGY,
FACULTY OF LIFE SCIENCES,
AHMADU BELLO UNIVERTY,
ZARIA, NIGERIA
Keywords
EFFECTS,, REPLACEMENT,, SOYA BEAN,, (GLYCINE MAX. LINN),, MEAL,, SOYA BEAN OFFAL MEAL,, DIET,, NILE TILAPIA OREOCHROMIS NILOTICUS,, (LINNAEUS, 1758),, FINGERLINGS.