Shift of Feeding Mode in an Epizoic Stalked Barnacle Inducing Gall Formation of Host Sea Urchin.
Shift of Feeding Mode in an Epizoic Stalked Barnacle Inducing Gall Formation of Host Sea Urchin.
复制标题
生代有柄藤壶摄食模式的转变诱导宿主海胆形成胆汁。
DOI：
10.1016/j.isci.2020.100885
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发表时间：
2020
期刊：
影响因子：
5.8
通讯作者：
M.
中科院分区：
文献类型：
--
作者：
Yamamori;L.;& Kato;M.
在众多的有柄藤壶中，Rugilepas pearsei（胸科：蔓足目：节肢动物）是一种罕见的独特物种，与棘虫有关，具有高度萎缩的蔓。首次从描述中重新发现了藤壶，并证实藤壶专性生活在海胆棘丝菌（Echinothrix迪亚德马，Diadematidae：Echinodermata）的半开瘿中。分子系统发育分析表明，专性协会与海胆来自甲壳动物的epizoic生活。一个稳定的同位素分析表明，藤壶饲料颗粒有机物（POM）没有寄生宿主海胆。这些研究结果表明，主机转移造成的损失的板和羽毛状的cirri，在连接设备的变化，从粘固锚定，并在喂养模式的转变，从过滤器喂养POM收集。藤壶的表生，表面上亚内生，在坚固但狭窄的虫瘿中的群落生活导致以减少生长为代价的重复繁殖。
Among diverse stalked barnacles,Rugilepas pearsei(Thoracica: Cirripedia: Arthropoda) is a rare unique species that is associated with echinoids and has highly atrophied cirri. We rediscovered the barnacle for the first time from description and verified that the barnacles live obligately in half-open galls formed on the test of the sea urchinEchinothrix diadema(Diadematidae: Echinodermata). A molecular phylogenetic analysis demonstrated that the obligate association with echinoids derived from epizoic life on crustaceans. A stable isotope analysis suggests that the barnacle feeds on particulate organic matter (POM) without parasitizing the host echinoids. These findings suggest that the host shift caused losses of plates and feather-like cirri, changes in the attachment device from cementation to anchoring, and a shift in feeding mode from filter feeding to POM collection. The barnacle's epizoic, superficially sub-endozoic, communal life in stout but narrow galls causes repetitive reproduction at the cost of reduced growth.