Effects of Low Temperature on the Fatty Acid Compositions of Adult of Acanthoscelides obtectus (Say) (Coleoptera: Chrysomelidae)

Effect of rearing substrate on growth performance, waste reduction efficiency and chemical composition of black soldier fly (Hermetia illucens) larvae

“…The high presence of SFA in insects is connected with cold adaptation . Indeed, larvae from some species showed a SFA decrease from summer to autumn, while PUFA increased, highlighting a correlation between the change in FA composition and the temperature due to seasonal change . BSF is a subtropical species growing at high temperatures (27–32 °C), and the difficult adaptation to low temperatures was demonstrated by the lowest BSF survival rate at about 16 °C .…”

“…42 Indeed, larvae from some species showed a SFA decrease from summer to autumn, while PUFA increased, highlighting a correlation between the change in FA composition and the temperature due to seasonal change. [42][43][44] BSF is a subtropical species growing at high temperatures (27-32 ∘ C), and the difficult adaptation to low temperatures was demonstrated by the lowest BSF survival rate at about 16 ∘ C. 45 We can argue that the high SFA presence could be ascribed to BSF adaptation to the subtropical climate. In particular, the high content of lauric acid (melting point: 43.2 ∘ C) could preserve BSF larvae from lipid oxidation and allow them to survive at temperatures above 40 ∘ C. 41 Consistent with other findings, 7,15,32 C18:1 c9 was the main represented MUFA in the larvae, while C18:2 n6 and C18:3 n3 were the main represented PUFA n6 and PUFA n3, respectively.…”