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首页> 外文期刊>Marine ecology progress series >Environmentally mediated phenotypic links and performance in larvae of a marine invertebrate
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Environmentally mediated phenotypic links and performance in larvae of a marine invertebrate

机译：海洋无脊椎动物幼体的环境介导表型联系和表现

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We studied the effects of environmental conditions experienced during embryonic and larval phases on development and larval survival of the marine shrimp Palaemon serratus, and examined how these conditions modified the relationship between larval and maternal phenotypes. Egg-carrying females were incubated at different temperatures (12 and 18℃), and freshly hatched larvae were exposed to a combination of temperatures (18 and 24℃), salinities (25 and 32 PSU) and food conditions (ad libitum vs. limited). Temperatures experienced by embryos had no significant effects on development, and only weak effects on survival, whereas environmental conditions experienced by larvae had strong effects on development-the duration of development was longer at lower temperatures and under food-limited conditions, and food limitation increased the number of larval instars necessary to reach the juvenile phase (especially at the highest temperature), perhaps reflecting a mismatch between increased metabolic demands and reduced energy supply. Links between larval and female phenotypes were evident: large females generally produced significantly larger larvae than smaller females. In larvae reared under food limitation, average development time and number of instars required to reach the juvenile phase were negatively correlated with average larval body mass at hatching. Thus, larval development is linked to initial larval body mass and female body size; however, these links can be modified by environmental conditions experienced by the larvae. In situations of high temperatures and food limitation, larger P. serratus females may play a more important role in the maintenance of populations, as they produce large offspring capable of ameliorating the effects of temperature and food limitation on development.
机译：我们研究了胚胎期和幼虫期所经历的环境条件对海虾Palaemon serratus发育和幼虫存活的影响，并研究了这些条件如何改变幼虫与母体表型之间的关系。携带卵的雌性在不同温度（12和18℃）下孵育，刚孵化的幼虫暴露于温度（18和24℃），盐度（25和32 PSU）和食物条件（随意或有限）的共同作用下）。胚胎所经历的温度对发育没有显着影响，而对存活仅有微弱的影响，而幼虫所经历的环境条件对发育有很强的影响-在较低温度和有限食物条件下，发育时间更长，并且食物限制增加达到幼年阶段（特别是在最高温度）所需的幼虫龄数，这可能反映了新陈代谢需求增加和能量供应减少之间的不匹配。幼虫和雌性表型之间的联系很明显：大型雌性通常产生的幼虫要比较小雌性大得多。在食物限制下饲养的幼体中，达到幼体阶段所需的平均发育时间和幼虫数量与孵化时的平均幼体体重呈负相关。因此，幼虫的发育与初始幼虫的体重和雌性体型有关。但是，这些链接可以通过幼虫所经历的环境条件进行修改。在高温和食物限制的情况下，较大的锯齿对虾（P. serratus）雌性可能在维持种群方面发挥更重要的作用，因为它们产生的后代能够缓解温度和食物限制对发育的影响。

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