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首页> 外文期刊>Marine biology >The effect of temperature on the evolution of per offspring investment in a globally distributed family of marine invertebrates (Crustacea: Decapoda: Lithodidae)
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The effect of temperature on the evolution of per offspring investment in a globally distributed family of marine invertebrates (Crustacea: Decapoda: Lithodidae)

机译：温度对全球分布的海洋无脊椎动物家族的后代投资进化的影响（甲壳纲：十足目：Li科）

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摘要

Within the marine environment, per offspring investment (POI) is associated with modes in larval development; an increase in POI has often been described with a decrease in temperature, as evidenced along latitudinal clines. However, the environmental drivers of POI remain largely hypothetical and have not yet been tested within an evolutionary context. Here, we test the hypothesis that developmental temperature is linked to POI within a globally distributed and diverse family of benthic crustaceans, the Lithodidae, also known as stone or king crab. To do this, we examine variations in egg diameter-a proven corollary of POI-within the Lithodidae. Based on a rare case of well-construed phylogeny, we test the relationship between egg diameter and two aspects of the maternal physical environment: water depth and temperature. We observe a significant relationship between decreasing environmental temperature and an increase in POI within genera of lithodid crabs, and independent of depth. There is a clear correlation of high levels in POI with a decrease in temperature in lithodid crab genera currently inhabiting the deep sea, all of which follow a food-independent (lecithotrophic) mode of larval development. In contrast, lithodid genera thriving in the warmer waters of shallow (continental shelf) seas follow a feeding (planktotrophic) mode in larval development. We conclude that temperature is an important factor governing POI, and discuss its importance in the evolution of larval lecithotrophy in marine invertebrates.
机译：在海洋环境中，每个后代的投资（POI）与幼体发育的方式有关；如横向纬线所证明的，POI的增加通常伴随温度的降低而描述。但是，POI的环境驱动因素在很大程度上仍是假设性的，尚未在进化背景下进行检验。在这里，我们测试了以下假设：在全球底栖甲壳纲动物石斑科（Lithodidae，又称石蟹或帝王蟹）的全球分布和多样化家族中，发育温度与POI相关。为此，我们检查了卵形体内卵直径的变化（这是POI的推论结果）。基于系统发育的罕见案例，我们测试了卵径与孕产妇身体环境两个方面之间的关系：水深和温度。我们观察到，在结石蟹属内，环境温度的降低与POI的增加之间存在显着的关系，并且与深度无关。 POI的高水平与目前生活在深海的石蟹属的温度降低之间存在明显的相关性，所有这些都遵循与食物无关的（营养化）幼体发育模式。相反，在浅海（大陆架）较温暖的水域中，小石藻属繁盛，在幼体发育过程中遵循摄食（浮生）模式。我们得出结论，温度是控制POI的重要因素，并讨论了温度在海洋无脊椎动物幼体卵形营养进化中的重要性。

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    《Marine biology》 |2016年第3期|48.1-8.9|共9页
  • 作者

    Thatje Sven; Hall Sally;

  • 作者单位

    Univ Southampton, Ocean & Earth Sci, Natl Oceanog Ctr, European Way, Southampton SO14 3ZH, Hants, England;

    Univ Southampton, Ocean & Earth Sci, Natl Oceanog Ctr, European Way, Southampton SO14 3ZH, Hants, England;

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