In this study, the development of gonads of the clam, Mactra quadrangularis, in soil pools was evaluated using histological methods, and the growth and survival of larvae and juveniles were investigated. The results showed that compared to wild samples from the marine region, the breeding period of M. quadrangularis was extended from 15–30 days to more than 60 days, which greatly improved the controllability of artificial breeding of the clam. The growth rate of individuals in the larval and metamorphosis stages was 7.83 ± 1.33 µm, and the survival rate was relatively high (80.24% ± 2.36%). The population metamorphosis duration was 5–6 days, the metamorphosis rate of larvae was 73.33% ± 1.67%, and their size was 188.33 µm ± 2.92 µm. The survival rate of both early and late juvenile stages was > 90%, and the growth rate (127.67 ± 37.50 μm ~ 268.21 ± 55.33 μm) was also faster than that of the larval and metamorphosis stages. The 90‐day‐old juveniles reached a size of 16.17 ± 0.43 mm. These results show that culture in the soil pool effectively prolonged the breeding season of M. quadrangularis, which provides a theoretical foundation for improving artificial breeding of M. quadrangularis.

中文翻译：

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利用土壤池延长蛤Mac Mactra quadrangularis的繁殖时期和养殖（Reeve，1854）

在这项研究中，使用组织学方法评估了蛤，性腺（Mactra quadrangularis）在土壤池中的发育，并研究了其幼虫和幼体的生长和存活。结果表明，与海洋地区的野生样品相比，四角芒的繁殖期蛤从15-30天延长到60天以上，大大提高了蛤lam人工繁殖的可控性。幼虫和变态阶段个体的生长速度为7.83±1.33 µm，存活率相对较高（80.24％±2.36％）。种群变态持续时间为5-6天，幼虫变态率为73.33％±1.67％，其大小为188.33 µm±2.92 µm。幼虫早期和晚期的成活率均大于90％，生长速度（127.67±37.50μm〜268.21±55.33μm）也比幼虫和变态阶段要快。90天龄的幼体大小为16.17±0.43毫米。这些结果表明，土壤池中的培养有效地延长了四棱M的繁殖季节。为改良四角兰人工繁育提供了理论基础。