Table 2.

Analysed selenium (Se) concentrations in test substrates and in corresponding black soldier fly (BSF) prepupae¹ and calculated bioaccumulatioin factor (BAF), and Se increase ratio relative to control group prepupae (adapted from Ferrari et al., 2022).

Rearing substrate	Se in the substrate, mg/kg	Se in the prepupae, mg/kg	BAF2	Se increase expressed as ratio relative to control group prepupae
Control diet	1.33	0.41	0.31	–
Algae (AN30) diet	1.01	0.21	0.21	−50%
Se diet	1.63	1.17	0.72	+285%

¹Expressed as milligrams of Se per kilogram DM substrate or prepupae.

²Calculated as in Purchke et al. (2017).