ORIGINAL PAPER
Partial replacement of fish meal with soldier termite in juvenile
Mozambique tilapia: Effects on growth performance, blood serum
chemistry and histomorphology
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University of Limpopo, School of Agricultural and Environmental Sciences, Faculty of Science and Agriculture, Aquaculture
Research Unit, Sovenga, 0727, South Africa
Publication date: 2024-02-10
Corresponding author
L. E. Nephale
University of Limpopo, School of Agricultural and Environmental Sciences, Faculty of Science and Agriculture, Aquaculture
Research Unit, Sovenga, 0727, South Africa
M. M. Rapatsa-Malatji
University of Limpopo, School of Agricultural and Environmental Sciences, Faculty of Science and Agriculture, Aquaculture
Research Unit, Sovenga, 0727, South Africa
J. Anim. Feed Sci. 2024;33(2):243-252
KEYWORDS
TOPICS
ABSTRACT
Insect-based meals have emerged as a viable global scale
alternative to fish meal in aquafeed. This is mainly due to their high protein
content, balanced amino acid composition, and fatty acid profile, which closely
resembles that of fish meal. An 8-week trial was conducted to evaluate the growth
performance, blood serum chemistry, and histomorphology of Mozambique
tilapia (Oreochromis mossambicus) fed diets containing soldier termite meal as
a partial substitute for fish meal. Five isonitrogenous, isolipidic, and isocaloric
diets were formulated to partially replace fish meal with soldier termite meal at 0,
10, 30, 50, and 70%, labelled as D1, D2, D3, D4, and D5, respectively. The study
showed that soldier termite meal could replace fish meal up to a 50% inclusion
level. The growth performance and nutrient utilisation of fish fed diet D4 (50%)
were comparable to fish fed the control diet. Fish fed the diet with the highest
proportion of soldier termite meal (70%) showed significantly higher alanine
aminotransferase and aspartate aminotransferase levels (P < 0.05). Cholesterol,
triglyceride, and glucose levels were not influenced by the inclusion of soldier
termite meal in the diet of Mozambique tilapia (P > 0.05). The histomorphological
examination of the intestines revealed no discernible alterations. The current
study has demonstrated that soldier termite meal can replace fish meal up to
50% of the feed content without inducing adverse effects on growth performance
and health status of O. mossambicus. The cost-benefit analysis showed that
substituting fish meal with soldier termite meal was economically sustainable.
ACKNOWLEDGEMENTS
The National Research Foundation (NRF) and
the University of Limpopo, Aquaculture Research
Unit are recognised for financial support. Mr. Gavin
Geldenhuys is appreciated for his technical assistance.
FUNDING
This work was supported by the National Research
Foundation (NRF) and the University of
Limpopo (Aquaculture Research Unit).
CONFLICT OF INTEREST
The Authors declare that there is no conflict of
interest.
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