Reproductive and Growth Parameters of the Razor Clam, Cultellus maximus (Gmelin, 1791), in Southern Vietnam
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Lai, Quan T; Tuan Vu Anh; Dieu Dinh Kim; Orfinger, Alexander B; Ly, Ngo Minh; et al.  Ocean Science Journal; Heidelberg Vol. 57, Iss. 4, (2022): 631-641. DOI:10.1007/s12601-022-

This study aimed to analyze the sex ratio, spawning seasons, length at first maturity, length distribution, length–weight relationship, and relative condition factor of Cultellus maximus (Gmelin, 1791) in Southern Vietnam. A total of 1037 individuals of C. maximus were collected at 3 sampling sites from June, 2019 to June, 2020. The sex ratio was found to be female biased in Can Gio and male biased in Phu Tan and Ngoc Hien. The clam spawns throughout the year, peaking at Q2 and Q3 during the rainy season. Pooled length at first maturity was 10.12 cm (9.65–10.49 cm CI 95%, P-value < 2.2·10–16). The length–weight relationship indicates positive allometric growth. This study suggests that imposing a minimum harvest size limit on C. maximus using the length at first maturity as reference and with harvest seasons in Q1 in Ngoc Hien and Can Gio and Q2 or Q3 in Phu Tan would be ideal for consumption of this species.