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Research article - Peer-reviewed, 2020

Mineral analysis reveals extreme manganese concentrations in wild harvested and commercially available edible termites

Verspoor, Rudi L.; Soglo, Murielle; Adeoti, Razack; Djouaka, Rousseau; Edwards, Sam; Fristedt, Rikard; Langton, Maud; Moriana, Rosana; Osborne, Matthew; Parr, Catherine L.; Powell, Kathryn; Hurst, Gregory D. D.; Landberg, Rikard;

Abstract

Termites are widely used as a food resource, particularly in Africa and Asia. Markets for insects as food are also expanding worldwide. To inform the development of insect-based foods, we analysed selected minerals (Fe-Mn-Zn-Cu-Mg) in wild-harvested and commercially available termites. Mineral values were compared to selected commercially available insects. Alate termites, of the genera Macrotermes and Odontotermes, showed remarkably high manganese (Mn) content (292-515mg/100gdw), roughly 50-100 times the concentrations detected in other insects. Other mineral elements occur at moderate concentrations in all insects examined. On further examination, the Mn is located primarily in the abdomens of the Macrotermes subhyalinus; with scanning electron microscopy revealing small spherical structures highly enriched for Mn. We identify the fungus comb, of Macrotermes subhyanus, as a potential biological source of the high Mn concentrations. Consuming even small quantities of termite alates could exceed current upper recommended intakes for Mn in both adults and children. Given the widespread use of termites as food, a better understanding the sources, distribution and bio-availability of these high Mn concentrations in termite alates is needed.

Keywords

edible termites; mineral analysis

Published in

Scientific Reports

2020, volume: 10, number: 1, article number: 6146
Publisher: NATURE PUBLISHING GROUP

Authors' information

Verspoor, Rudi L.
Univ Liverpool
Soglo, Murielle
IITA Res Stn
Adeoti, Razack
IITA Res Stn
Djouaka, Rousseau
IITA Res Stn
Edwards, Sam
Univ Liverpool
Fristedt, Rikard
Chalmers Univ Technol
Swedish University of Agricultural Sciences, Department of Molecular Sciences
Moriana, Rosana
Swedish University of Agricultural Sciences, Department of Molecular Sciences
Osborne, Matthew
Stockholm Environm Inst
Parr, Catherine L.
Univ Liverpool
Parr, Catherine L.
Univ Pretoria
Parr, Catherine L.
Univ Witwatersrand
Powell, Kathryn
Univ Liverpool
Hurst, Gregory D. D.
Univ Liverpool
Landberg, Rikard
Chalmers Univ Technol

UKÄ Subject classification

Food Science

Publication Identifiers

DOI: https://doi.org/10.1038/s41598-020-63157-7

URI (permanent link to this page)

https://res.slu.se/id/publ/105714