Ectosymbiosis between filamentous sulphur bacteria and a stalked barnacle (Scalpellomorpha, Neolepadinae) from the Lau Back Arc Basin, Tonga
Ectosymbiosis between filamentous sulphur bacteria and a stalked barnacle (Scalpellomorpha, Neolepadinae) from the Lau Back Arc Basin, Tonga
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汤加劳后弧盆地的丝状硫细菌与有柄藤壶（Scalpellomorpha、Neolepadinae）之间的外共生
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发表时间：
1998
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影响因子：
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通讯作者：
W. Newman
中科院分区：
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作者：
A. Southward;W. Newman
研究太平洋热液喷口丰富的藤壶的生物学家一直在寻找与硫细菌的共生关系，因为这种生活方式在其他喷口动物群体中占主导地位，尤其是管虫和软体动物。然而，既没有发现外共生体也没有发现内共生体。与周围深海和陆架区域的鳞状体相比，来自喷口的新epadine藤壶具有更精致的卷肢和口部，这些特征可被视为适应以包括细菌在内的细颗粒为食（Newman, 1979; Jones, 1993; Newman & Yamaguchi, 1995； Southward等，1997;Yamaguchi & Newman, 1997a, 1997b）。但是，没有任何迹象表明，在大西洋中海沟（MAR）发现了与弹性虾（Rimicaris exoculata Williams & Rona, 1986） （Pimenov et al., 1992; Segonzac, 1992; Segonzac et al., 1993; Gebruk et al., 1993）相媲美的战略位置外共生细菌生长。我们现在在劳弧后盆地的一种未描述的新奥帕丁中记录了这种现象，它的环状刚毛至少是其他喷口藤壶的两倍长，并能忍受丝状细菌的生长。这些细菌与海洋中发现的里米卡里斯细菌相当。
Biologists studying barnacles abundant at hydrothermal vents in the Pacific have been on the lookout for symbiosis with sulphur bacteria, since such a mode of life is predominant in other groups of vent animals, notably tubeworms and molluscs. However, neither ectosymbionts nor endosymbionts have been seen. The neolepadine barnacles from vents have more delicate cirri and mouth parts than scalpellomorphs from surrounding deep sea and shelf regions, features that can be regarded as adaptations to feeding on fine particles, including bacteria (Newman, 1979; Jones, 1993; Newman & Yamaguchi, 1995; Southward et al., 1997; Yamaguchi & Newman, 1997a, 1997b). But there has been no hint of strategically placed ectosymbiotic bacterial growths comparable to those on the bresiliid shrimp, Rimicaris exoculata Williams & Rona, 1986, from the MidAtlandic Ridge (MAR) (Pimenov et al., 1992; Segonzac, 1992; Segonzac et al., 1993; Gebruk et al., 1993). We now record the occurrence, in an undescribed neolepadine from the Lau Back-Arc Basin, of cirral setae that are at least twice as long as those in other vent barnacles and bear growths of filamentous bacteria. The bacteria are comparable to those found on Rimicaris at the MAR.