Juveniles stick to adults: recruitment of the tube-dwelling polychaete Lanice conchilega (Pallas, 1766)
Juveniles stick to adults: recruitment of the tube-dwelling polychaete Lanice conchilega (Pallas, 1766)
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幼体粘在成体身上：管栖多毛类 Lanice conchilega 的招募（Pallas，1766）
DOI：
10.1023/b:hydr.0000008494.20908.87
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发表时间：
2004
期刊：
影响因子：
2.6
通讯作者：
R. Callaway
中科院分区：
文献类型：
--
作者：
R. Callaway
在英国南威尔士的一个露天海滩上发现了管栖多毛藻（polychaete L. conchilega）的幼鱼附着在成虫的管上。它们附着在沉淀物上方突出的管子的上部。本研究的目的是确定幼鱼沉降到成鱼管上的时间，它们的丰度和大小分布，以及再沉降后沉积物中分离的时间和密度。进一步确定幼管的沉积物组成是否与成虫和周围沉积物不同。1998年、1999年和2000年，分别对成螺管进行了取样，定量测定了附着稚螺的数量和大小。估算了孤生松茸在沉积物中的密度，以及孤生管的大小分布。春季平均有5-13只幼鱼附着在单个成虫管上，但数量变化很大，1998年4月最高可达72只。讨论了硬基质的可用性和化学线索作为触发幼鱼附着于成虫管的潜在因素。幼鱼在附着1个月后开始分离并重新定居在沉积物中。一旦定居在沉积物中，幼鱼的数量急剧减少，但单生松鸡的大小分布表明，在种群中有一些幼鱼存活下来。然而，青少年新兵的数量对成年新兵密度的影响程度仍不清楚。幼鱼比成年鱼使用更小的平均颗粒大小来建造管道，但它们都积极选择颗粒。
Juveniles of the tube-dwelling polychaete L. conchilega were found attached to adult tubes at an exposed beach in South Wales (U.K.). They attached to the upper part of tubes protruding above the sediment. The aim of this study was to determine the timing of juvenile settlement on to adult tubes, their abundance and size distribution, and the time of detachment and densities in the sediment after re-settlement. Furthermore, to establish whether the sediment composition of juvenile tubes differed from those of adults and the surrounding sediment. In 1998, 1999 and 2000, tubes of adult L. conchilegawere sampled and numbers of attached juveniles were quantified and their sizes measured. Densities of solitary L. conchilega in the sediment were estimated, as well as the size distribution of solitary tubes. On average, 5–13 juveniles were attached to single adult tubes in spring, but numbers varied greatly with up to 72 juveniles on a single tube in April 1998. Availability of a hard substratum and chemical cues are discussed as potential factors triggering the attachment of juveniles to adult tubes. Juveniles started to detach and re-settle in the sediment 1 month after attachment. Once settled in the sediment, juvenile numbers decreased steeply, but the size distribution of solitary L. conchilega suggested that some juveniles survived in the population. However, the extent to which numbers of juvenile recruits contribute to the density of adults remained unclear. Juveniles used a smaller mean particle size for tube building than adults, but both actively selected particles.