和蔼巴非蛤人工育苗及稚贝培育技术

    Artificial Seedling Cultivation and Juvenile Shell Cultivation Technology of Paphia amabilis

    • 摘要: 探讨了和蔼巴非蛤Paphia amabilis的人工育苗技术与稚贝培育技术,旨在为实现和蔼巴非蛤苗种规模化、高效化的繁育生产提供技术资料。分别采用聚类分析、单因素方差分析等方法,开展了和蔼巴非蛤物种鉴定及苗种繁育关键技术研究。结果表明:试验稚贝的COI序列与Paphia amabilis序列相似度为100%,所测稚贝均为和蔼巴非蛤。在和蔼巴非蛤繁殖期选择平均壳长为45.37 mm的亲贝,采用阴干+氨海水刺激的催产方法获得受精卵,催产率和孵化率分别为59.25%、91.68%。在水温28.1℃、盐度27.5的条件下,受精卵经20 h发育为D形幼虫,幼虫培育密度为1~2个·mL−1,经过9 d发育至变态幼虫期。采用细砂作为附着基,经过3~5 d培育,幼虫全部变态为稚贝,变态率可达50%以上。早期稚贝采用有砂培育,壳长大于1 mm的稚贝则采用无砂培育,稚贝经过6个月室内水泥池培育,壳长可达12 mm以上。选用壳长大于12 mm的稚贝开展中苗室外水泥池培育试验,结果显示架空组的生长速度和成活率显著高于未架空组。

       

      Abstract: The techniques of artificial seedling raising and juvenile shellfish cultivation of Paphia amabilis were discussed in order to provide technical data for large-scale and efficient breeding and production of P.amabilis seedlings Clustering single factor variance was used to study the key techniques of species identification and seedling breeding of P.amabilis.The results showed that the similarity between the COI sequences of the juvenile shellfish and those of P.amabilis was 100%. All the juvenile shellfish were P.amabilis.The parent shellfish with average shell length of 45.37 mm were selected to induce the fertilized eggs to spawn with dry shade and ammonia seawater. The hatching rate was 59.25% and 91.68%, respectively. Under the condition of water temperature 28.1℃ and salinity 27.5, fertilized eggs developed into D-shaped larvae after 20 hours, and the larvae were developed to larvae after 9 days with cultivate density of 1~2 inds./mL. After 3~5 days cultivation with fine sand as attachment base, all the larvae were developed into juvenile shellfish, and the development rate was over 50%. In the early stage, the shell length of juvenile shellfish cultured with sand was more than 1mm, while the shell length of juvenile shellfish cultured without sand was more than 12 mm after 6 months in indoor cement pond. Juvenile shellfish with shell length was more than 12 mm were used to cultivate medium seedlings in cement pond. The results showed that the growth rate and survival rate of the overhead group were significantly higher than those of the non-overhead group.

       

    /

    返回文章
    返回