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We investigated the thickness of the nacreous elemental lamina (TNEL) and the quality of cultured pearls using two lineages, thick or thin TNEL, of sacriˆced pearl oysters Pinctada fucata used as grafts (donors) in the same hosts. The purpose of this study was to understand the in‰uence of the TNEL of donors on both the TNEL and the quality of Akoya oyster pearls. Donors with thick or thin TNEL were hatched in May 2012. Two mantle grafts derived from each donor having thick or thin TNEL were implanted into the same pearl hosts, at two experimental divisions in two locations in Uwajima City during April 2014. The pearls in the oysters were cultivated until January 2015. The results showed that the TNEL of pearls developed from donors with thick TNEL were signiˆcantly thicker than the pearls developed from donors with thin TNEL, at both experimental divisions. The TNEL of the pearls had a strong positive correlation with the TNEL of the donors. The TNEL of the pearls in‰uenced pearl interference color, suggesting that the TNEL of the pearls could in‰uence pearl value.

Influence of the thickness of the nacreous elemental lamina of the pearl oyster <i>Pinctada fucata</i> used as donor oysters on the pearls