SEM observations on larval shell morphology of Manila clam Ruditapes philippinarum and their utility
SEM observations on larval shell morphology of Manila clam Ruditapes philippinarum and their utility
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马尼拉蛤幼体壳形态的扫描电镜观察及其应用
DOI：
10.1007/s12562-012-0560-y
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发表时间：
2012
影响因子：
1.9
通讯作者：
Hideo Sekiguchi
中科院分区：
文献类型：
--
作者：
Nariaki Inoue;Ryogen Nanbu;Natsuki Hasegawa;Junya Higano;Hisami Kuwahara;Hideo Sekiguchi
菲律宾蛤仔在日本的潮滩上很常见，数量也很多，形成了一种具有重要商业价值的蛤类渔业。然而，自1975-1985年以来，马尼拉文蛤的年渔获量急剧下降。为了研究马尼拉文蛤幼虫的招募过程，我们对20℃和24℃下饲养的文蛤幼虫和幼虫壳进行了扫描电子显微镜(SEM)观察。20℃和24℃下饲养的文蛤幼虫终壳长度没有显著差异，但20℃下饲养的文蛤幼虫历期和幼体稳定大小的贝壳长度比24℃下饲养的要长得多。这些结果表明，幼体的历期和生长以及定居大小可能随温度(可能是季节)而发生显著变化。马尼拉文蛤的幼虫壳形态可以为幼虫的招募过程提供必要的信息。
Manila clamRuditapes philippinarumis common and abundant on Japanese tidal flats, forming a commercially important clam fishery. However, annual catches of Manila clam have decreased drastically since 1975–1985. To study larval recruitment processes of Manila clam, we carried out scanning electron microscopy (SEM) observations on larval and juvenile shells of clams reared at 20 and 24 °C. There was no significant difference in final shell length of trochophores between 20 and 24 °C. However, the larval duration was much longer and the shell length of settled size of pediveligers was much larger for clams reared at 20 °C than those reared at 24 °C. These findings suggest that larval duration and growth, as well as settlement size, may vary markedly depending on temperature (and probably on season). The larval shell morphology of Manila clam can provide essential information about larval recruitment processes.