Research Article: Seasonal variations in the biochemical composition of sea urchin (Hemicentrotus pulcherrimus) roe

Seasonal changes in the biochemical composition of Hemicentrotus pulcherrimus roe were analyzed from May ۲۰۱۶ to February ۲۰۱۷ in Korea. Spawning, occurring between April and May, was characterized by relatively low lipid (۳.۴۶ g/۱۰۰ g) and protein levels (۱۳.۲۲ g/۱۰۰ g). Concurrently, calcium level was increased, while magnesium level was decreased. The roe’s polyunsaturated fatty acids (PUFA) content was high, constituting ۴۰% of total fatty acids, with eicosapentaenoic acid (C۲۰:۵n-۳) and eicosatrienoic acid (C۲۰:۳n-۳) being the most predominant. During the spawning season, lower levels of ascorbic acid (۳۰.۹ mg/kg) and folic acid were observed alongside higher concentrations of riboflavin (۷.۲۴ mg/kg) and niacin (۲۳۲.۳۲ mg/kg). Vitamin E content was at its lowest in May, measuring ۰.۰۵ mg/۱۰۰ g, compared to a range of ۱.۶۲–۲.۲۲ mg/۱۰۰ g in other seasons. Overall, the results suggest that H. pulcherrimus roe is a valuable source of protein, minerals, vitamins, and glycine, an important flavor component. However, significant variations in its biochemical components were noted during the spawning period compared to other seasons.