1. Evaluation of Housefly Musca domestica Maggot Meal as Protein Source in Nile Tilapia Oreochromis niloticus Diets
Nazael A. Madalla, Tausi Ally, & Sebastian W. Chenyambuga
Department of Animal, Aquaculture & Range Sciences
Sokoine University of Agriculture
Tanzania

2. Introduction
Despite phenomenal global growth of aquaculture, such growth remained elusive in Tanzania.
73.8 Million MT vs. 10,317 MT in 2014
Mostly subsistence, small semi-intensive freshwater ponds typically stocked with tilapias
Lack of quality and affordable fish feeds is one of the limiting factors as fishmeal and oil seedcakes are scarce and unaffordable.

3. Aquaculture Production Trend in Tanzania
Source: FAO FishStat

4. …Introduction Housefly maggots are promising protein source
locally available
palatable
relatively affordable
short life cycle
high fecundity
The current study evaluated suitability of housefly maggot meal (HFM) as protein source in practical Nile tilapia diets.

5. …Introduction Life Cycle of House Fly
Source:

6. Methodology The maggots were produced indoors
Substrate: cattle manure
Attractant: cattle offals and fish remains.
Harvested maggots were blanched, oven dried at 650C for 48 hours and then ground into a meal
Five diets were formulated to contain 30% protein and 10% lipid.

7. …Methodology
Maggot Culture

8. …Methodology
Maggot Harvest

9. …Methodology Formulation of HFM Diets (g/100g diet) Ingredients Diets
Fish meal
5.0
Housefly maggot meal
0.0
12.0
24.5
40.0
49.8
Cottonseed meal
50.0
39.0
25.0
9.0
Maize meal
38.5
40.5
42.0
42.2
Wheat meal
2.0
Sunflower oil
1.0
1.5
Vitamin/mineral premix*
*Vitamin A 25,500,000 IU, Vitamin D3 5, 000, 000 IU, Vitamin E 5,050 IU, Vitamin B2 mg 4,750, Vitamin B6mg 2,750, Vitamin B12 mcg 11, 750, Vitamin K3 mg 4,850, CAL PAN mg 5,750, Niacinamide mg 16, 500, Vitamin C 10, 000 mg, IRON 5,250 mg, MANGANESE 12, 760 mg, COPPER 13, 250 mg, ZINC 13, 250 mg, SODIUM CHLORIDE 48, 750 mg, MAGNESIUM 12, 750 mg, POTASSIUM ACETATE 73, 750 mg, LYSINE 15,000 mg, METHIONINE 12, 000 mg, antioxidant and anticaking qsf 1 kg.

10. …Methodology
The five diets were randomly allocated in triplicates to 20L tanks each stocked with 14 tilapia juveniles with an average weight of 2.4±0.048 g
The juveniles were fed twice a day at 0900 and 1700 hrs according to feeding response but not exceeding 5% of body weight for eight weeks

11. …Methodology
Experiment Units

12. …Methodology
Proximate analysis was done using methods described by AOAC, (2005).
Body weight and feed intake were measured weekly and used to compute
Growth
Feed Utilization
Cost Effectiveness
Data were analysed using one-way ANOVA at significant level of 5%

13. Results
Proximate Composition of Feedstuffs Used in Formulation (g/100g)
Items
Ingredients
HFM FM MM WM
CSM
Dry matter
97.52
98.96
88.01
96.9
97.50
Crude Protein
48.55
69.20
10.5
11.74
41.60
Ether Extract
19.07
10.28
3.60
1.80
8.5
Crude Fibre
5.71
1.0
2.3
1.55
14.37
Ash
11.13
22.76
1.30
1.91
6.70

14. Results Growth - AWG

15. …Results Growth – Initial and Final Weights

16. …Results Growth - ADG

17. …Results Growth - SGR

18. …Results Feed Utilization – FI

19. …Results Feed Utilization - FCR

20. …Results Feed Utilization - PER

21. …Results Cost Effectiveness - Price of Feed

22. …Results Cost Effectiveness – Cost of Producing 1kg of Fish

23. Conclusion Conclusion Further studies
HFM can be included at 40% in practical Nile tilapia diets without compromising biological and economical performance
Further studies
On-farm validation trials
Explore effect of different culture conditions on nutrient content of the HFM

24. Funding for this research was provided by the
The AquaFish Innovation Lab is supported in part by United States Agency for International Development (USAID) Cooperative Agreement No. EPP-A and by contributions from participating institutions.
This presentation is made possible by the generous support of the American people through the United States Agency for International Development (USAID). The contents are the responsibility of the authors and do not necessarily reflect the views of USAID or the United States Government. Mention of trade names or commercial products in this presentation does not constitute endorsement or recommendation for use on the part of USAID or AquaFish. The accuracy, reliability, and originality of the work presented are the responsibility of the individual authors.