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Linking Eye Design with Host Symbiont Relationships in Pontoniine Shrimps (Crustacea Decapoda Palaemonidae)

机译:将眼设计与蓬虾虾(甲壳纲十足纲Pala龙科)中的宿主共生关系联系起来。

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摘要

Symbiosis is prevalent in the marine environment with many studies examining the effects of such interactions between host and symbiont. Pontoniine shrimps are a group whose ecology is characterised by symbiotic interactions. This investigation examines the gross morphology of Pontoniinae compound eyes and superficial optical parameters with reference to their symbiotic relationship or lifestyle category; free-living, ectosymbiont, endosymbiont (bivalves) or endosymbiont (non-bivalves). The eye morphologies of free-living and ectosymbiotic species are very similar, yet differ from both forms of endosymbiotic species. Endosymbionts have significantly smaller and simpler eyes with larger facets and bigger interommatidial angles and eye parameters for increased sensitivity levels. However bivalve endosymbionts form an intermediary group between non-bivalve endosymbionts and ectosymbionts as a result of their more active lifestyle. The accessory eye or “nebenauge”, although of uncertain function, commonly occurs in free-living Pontoniinae species but rarely in endosymbionts apart from in more primitive species. The variation in morphology reflects tensions between functional requirements and ecological pressures that have strongly influenced eye design in Pontoniinae.
机译:共生在海洋环境中很普遍,许多研究检查了宿主与共生体之间这种相互作用的影响。蓬松虾是一种以共生相互作用为特征的生态种群。这项研究根据其共生关系或生活方式类别,检查了蓬鱼ina复眼的总体形态和表面光学参数;自由生活,外共生,内共生(双壳)或内共生(非双壳)。自由生活和外共生物种的眼形非常相似,但与两种内共生物种形式不同。内共生体的眼睛明显更小,更简单,具有更大的面和更大的枕间角度和眼睛参数,从而提高了敏感度。但是,双壳类共生菌由于其更加活跃的生活方式而在非双壳类共生菌和外生共生菌之间形成了一个中间基团。副眼或“ nebenauge”尽管功能不确定,但通常在自由生活的蓬鱼科物种中发生,但除了较原始的物种外,很少在共生共生体中出现。形态上的变化反映了功能需求和生态压力之间的紧张关系,这些紧张关系极大地影响了蓬头鱼眼的眼睛设计。

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