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首页> 外文期刊>Marine biology >Egg masses and development of Falsilunatia eltanini (Mollusca: Gastropoda): a deep-sea naticid from a Southwestern Atlantic Canyon
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Egg masses and development of Falsilunatia eltanini (Mollusca: Gastropoda): a deep-sea naticid from a Southwestern Atlantic Canyon

机译：鸡蛋的质量和Falsilunatia eltanini（软体动物：腹足纲）的发育：来自西南大西洋峡谷的深海杀虫剂

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A series of cruises to the Mar del Plata Submarine Canyon (38 degrees S/54 degrees W) off Argentina in 2012-2013 have provided biological material that enables insights into the various modes of development of deep-sea invertebrates at depths up to 3500 m. This study describes the unusually large encapsulated embryos of the globose moon snail, Falsilunatia eltanini Dell, 1990 (Naticidae), and compares them with another direct-developing naticid from the same collections, Bulbus carcellesi. Embryos of F. eltanini develop in sand ribbon egg masses that contain up to 6 conspicuous egg capsules, 5.0-8.5 mm diameter. Each F. eltanini egg capsule contains a single, similar to 170-mu m diameter egg and abundant, white, supplementary food. This allows the crawling pre-hatching juveniles to grow to 4.7 mm shell diameter. Different stages of development were found among multiple egg collars collected on the same date, which suggests a long reproductive season that could be continuous or periodic (lasting more than a year). The number of whorls in the hatchling juvenile shells and the significant size they attain confirm the occurrence of a long period of embryonic development. This reproductive strategy requires a large maternal investment in the very large egg capsules and abundant supplementary food. Within Naticidae, this extraordinary modality is only observed in several species inhabiting deep-sea and boreal cold waters.
机译：2012-2013年，阿根廷对马德普拉塔海底峡谷（南纬38度/西经54度）进行了一系列巡航，提供了生物材料，使您能够洞悉深海无脊椎动物在3500 m以下深度的各种发育方式。这项研究描述了球状蜗牛的异常大的封装胚胎，Falsilunatia eltanini Dell，1990年（Naticidae），并将它们与来自同一收藏品的另一个直接发育的拟南芥Bulbus carcellesi进行了比较。 F. eltanini的胚胎发育在沙带状卵团中，卵团最多包含6个显着的卵囊，直径为5.0-8.5 mm。每个F. eltanini卵囊都包含一个直径类似于170微米的卵，并且含有丰富的白色辅助食品。这样可使爬行的孵化前幼体长到4.7 mm的壳直径。在同一日期采集的多个蛋领中发现了不同的发育阶段，这表明一个漫长的繁殖季节可能是连续的或周期性的（持续超过一年）。孵化中的幼体中的轮生数量和它们获得的巨大大小证实了长期胚胎发育的发生。这种生殖策略需要大量的产妇投入很大的卵囊和丰富的辅助食品。在Na科内，这种非同寻常的形态仅在居住于深海和北方冷水的几种物种中观察到。

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    《Marine biology》 |2018年第5期|81.1-81.10|共10页
  • 作者

    Averbuj Andres; Penchaszadeh Pablo E.; Pastorino Guido;

  • 作者单位

    CENPAT, CCT CONICET, LARBIM IBIOMAR, Bvd Brown 2915,U9120ACV, Puerto Madryn, Chubut, Argentina;

    Consejo Nacl Invest Cient & Tecn, Museo Argentino Ciencias Natr, Lab Ecosistemas Costeros Malacol, Av Angel Gallardo 470,C1405DJR, Buenos Aires, DF, Argentina;

    Consejo Nacl Invest Cient & Tecn, Museo Argentino Ciencias Natr, Lab Ecosistemas Costeros Malacol, Av Angel Gallardo 470,C1405DJR, Buenos Aires, DF, Argentina;

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