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首页> 外文期刊>Marine biology >Consequences of maternal isolation from salinity stress for brooded embryos and future juveniles in the estuarine direct-developing gastropod Crepipatella dilatata
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Consequences of maternal isolation from salinity stress for brooded embryos and future juveniles in the estuarine direct-developing gastropod Crepipatella dilatata

机译：在河口直接发育的腹足纲腹足纲Crepipatella dilatata中，将母体从盐胁迫中分离出来的后果，用于育雏胚胎和未来的幼体

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At reduced salinities, brooding females of some gastropods and bivalves may isolate their mantle cavities from the environment for several days, maintaining internal osmotic concentration but causing severe declines in dissolved oxygen and pH, and increases in ammonia and other toxic substances in the mantle fluid. This study in November-December examined the immediate consequences of such stresses for brooded embryos of Quempillen estuary gastropod Crepipatella dilatata, in terms of time to juvenile emergence and rates of embryonic growth [measured as shell length (SL)]. Juveniles were also monitored for latent effects on feeding rates, oxygen consumption, and growth for the first 4 weeks after emergence into normal salinity seawater. An acute salinity stress lasting 3 days applied to females that were brooding pre-shelled or intermediate-shelled stages increased embryonic incubation periods, but without affecting SL at emergence. Growth rates were reduced for encapsulated embryos regardless of the stage at which the salinity stress was applied. Latent effects on juvenile development included slower shell growth and reduced rates of oxygen consumption and feeding. These effects were sustained for the first month after release from the female. The results suggest that marked reductions in salinity lasting for several days indirectly but negatively affect the development of brooded embryos of C. dilatata and also affect the juveniles for at least several weeks following their release, even after salinity has returned to normal.
机译：在盐度降低的情况下，某些腹足动物和双壳类的雌性成虫可能会将其地幔腔与环境隔离几天，保持内部渗透浓度，但会导致溶解氧和pH值严重下降，并导致地幔液中氨和其他有毒物质增加。这项研究于11月至12月进行了研究，从幼体出现的时间和胚胎的生长速率（以壳长（SL）衡量）来看，这种胁迫对昆仑连腹足纲腹足纲Crepipatella dilatata的育雏的直接后果。还监测了少年在进入正常盐度海水后的前4周对摄食率，耗氧量和生长的潜在影响。持续3天的急性盐分胁迫作用于孵化有壳或有壳的阶段的雌性，增加了胚胎的潜伏期，但在出苗时不影响SL。不论施加盐分胁迫的阶段如何，包囊胚胎的生长速率都会降低。对青少年发育的潜在影响包括壳生长减慢，氧气消耗和进食速率降低。从雌性动物释放后的第一个月，这些作用一直持续。结果表明，盐度的显着降低间接地持续了几天，但负面地影响了C. dilatata孵出的胚的发育，并且甚至在盐度恢复正常后也影响了幼体释放后至少几周。

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  • 来源
    《Marine biology》 |2014年第3期|619-629|共11页
  • 作者

    O. R. Chaparro; C. J. Segura; S. J. A. Osores; J. A. Pechenik; L. M. Pardo; V. M. Cubillos;

  • 作者单位

    Facultad de Ciencias, Instituto de Ciencias Marinas y Limnologicas, Universidad Austral de Chile, Valdivia, Chile;

    Facultad de Ciencias, Instituto de Ciencias Marinas y Limnologicas, Universidad Austral de Chile, Valdivia, Chile;

    Facultad de Ciencias, Instituto de Ciencias Marinas y Limnologicas, Universidad Austral de Chile, Valdivia, Chile;

    Biology Department, Tufts University, Medford, MA 02155, USA;

    Facultad de Ciencias, Instituto de Ciencias Marinas y Limnologicas, Universidad Austral de Chile, Valdivia, Chile;

    Facultad de Ciencias, Instituto de Ciencias Marinas y Limnologicas, Universidad Austral de Chile, Valdivia, Chile;

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