Lack of adequate animal proteins in human diets and its malnutrition consequences has led to advocacy for entomophagy. However, many edible insects are yet to be proven comparable to meat or fish. This study compared the nutritional quality of Pallid Emperor moth, Cirina forda and Atlantic mackerel, Scomber scombrus. Proximate and anti-nutrients quantities of the samples were determined using standard AOAC methods, mineral elements were measured using flame photometry and Atomic Absorption Spectroscopy, while amino acid were determined by HPLC method. The data obtained were analyzed using t-test at P<0.05. The results showed that there was no significant difference in the quantity of crude protein (43.07% and 43.65%) of the two samples. The mineral elements in both samples were adequate for human consumption, though most of them showed significantly higher quantity in S. scombrus. However, C. forda had significantly higher total amino acids, essential to nonessential amino acid ratio, Predicted Protein Efficiency Ratio (P-PER), Amino Acid Score and Protein Digestibility Corrected Amino Acid Scores (PDCAAS). Moreover, about 77.8% of essential amino acids in C. forda satisfied the Recommended Daily Allowance for humans. The study showed that the nutritional quality of C. forda compared well with that of S. scombrus and therefore recommended for human consumption.
Diapause is a complex life history strategy aimed at tolerating or circumventing stress in insects. It is accompanied by alterations in the food reserve levels to cope with the energy demand of this life stage. In the pallid emperor moth (Cirina forda), little is known about the patterns of accumulation and utilization of food reserves before and during diapause, respectively. The accumulation and utilization of food reserves in the haemolymph and the whole body of diapause-destined larvae and diapausing pupae of Cirina forda were progressively compared using photometry and HPLC. The quantity of glucose, total carbohydrate, fats, protein, and amino acids measured were taken as indices of food reserve accumulation and utilization by the immature stages of the insect in this study. Data collated were analyzed using Analysis of Variance (ANOVA), and the means were separated using Fisher's Least Significance Difference (LSD). The results showed progressive accumulation of glucose from 46.20 to 105.06 mg/100 g, total carbohydrates from 175.39 to 212.54 mg/100 g, lipids from 440.49 to 641.57 mg/100 g, and protein from 306.04 to 378.83 mg/100 g in the haemolymph of diapause-destined larvae. The reserves decreased progressively (72.1%, 60.3%, 5.7%, and 6.9%) in diapausing pupae. Total amino acids increased by 2.8%, while 61.1% of amino acids in the whole pupae increased significantly (P<0.05). The study concluded that C. forda accumulates food reserves in preparation for diapause, and reserves decline as they are probably utilized during diapause development.
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