The life history characteristics of the wood-boring bivalve Teredo bartschi are suited to the elevated salinity, oligotrophic circulation in the Gulf of Aqaba, Red Sea
The life history characteristics of the wood-boring bivalve Teredo bartschi are suited to the elevated salinity, oligotrophic circulation in the Gulf of Aqaba, Red Sea
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DOI：
10.1016/j.jembe.2009.05.014
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发表时间：
2009-07-15
影响因子：
2
通讯作者：
Hendy, I. W.
中科院分区：
文献类型：
--
作者：
Cragg, S. M.;Jumel, M. -C.;Hendy, I. W.
在亚喀巴湾，来自红海的贫营养沃茨缓慢、单向的表面流入可能会限制贫营养幼虫的扩散，从而有利于育雏而非贫营养发育。海湾北方末端的一个地点被用来检查Teredinidae（Bivalvia）科木蛀虫对育雏幼虫或浮游营养幼虫的招募情况。木板暴露4个月的深度从6米到36米，成为殖民地的育雏Teredo bartschi和几个人的Bankia carinata。现场的浮木包含I bartschi和孵卵的等足类蛀木虫Limnoria tripunctata。未检测到募集强度随深度的显著变化。壳的大小分布在面板内的单峰，这表明一个单一的时期的招聘，但壳的大小与拥挤程度呈负相关。对于T bartschi，托盘的长度和宽度被证明是很好的预测外壳直径。托盘宽度还限定虹吸开口的直径。在整个范围内的动物大小采样，这个开口往往是更大的T bartschi比Teredo navalis，一个物种，生长在更富的沃茨的宽度计算。幼虫壳，其中平均66 pm的宽度，组被发现的内表面上的约7%的所有成人壳调查。他们有特征的D轮廓和表面有坑的prodissoconch我壳有或没有少量的prodissoconch 11增长。这可能是一年中营养丰富的沃茨与上层水柱混合的时候的一次产卵事件造成的。在亚喀巴，T bartschi的水槽人口很可能是维持从红海漂流的成年人。这些观察建立了一个图片的生活史战略的T bartschi：育雏与母亲，而不是鸡蛋衍生的营养;释放非喂养pedioveliger：有限的幼虫传播;快速发展的同步育雏能力;传播漂流成人。(C)2009 Elsevier B. V.保留所有权利。
In the Gulf of Aqaba, the slow, unidirectional surface inflow of oligotrophic waters from the Red Sea may limit the dispersal of planktotrophic larvae, thus favouring brooded over planktonic development. A site at the northern end of the Gulf was used to examine recruitment by wood borers of the family Teredinidae (Bivalvia) with brooded or planktotrophic larvae. Wood panels exposed for 4 months at depths from 6 m to 36 m, became colonised by the brooding Teredo bartschi and a few individuals of the planktotrophic Bankia carinata. Driftwood at the site contained I bartschi and the brooding isopod wood-borer Limnoria tripunctata. No significant variation in intensity of recruitment with depth was detected. The size distributions of shells within the panels were unimodal, suggesting a single period of recruitment, but shell size was negatively correlated with the degree of crowding. For T bartschi, the length and width of pallets proved to be good predictors of shell diameter. Pallet width also defines the diameter of the siphonal opening. Across the range of animal sizes sampled, this opening tended to be larger in T bartschi than that calculated from reported widths of Teredo navalis, a species which grows in more plankton-rich waters. Groups of larval shells, which averaged 66 pm in width, were found on the inner surface of about 7% of all adult shells investigated. They had the characteristic D outline and pitted surface of a prodissoconch I shell with or without a small amount of prodissoconch 11 growth. These would have resulted from a single spawning event at about the time of year that nutrient-rich waters mix into the upper water column. At Aqaba, a sink population of T bartschi is likely to be maintained by adults rafting from the Red Sea. These observations build a picture of the life history strategy of T bartschi: brooding with maternal rather than egg-derived nutrition; release of a non-feeding pediveliger: limited larval dispersal; rapid development of a synchronous brooding capability; dispersal by rafting as adults. (C) 2009 Elsevier B.V. All rights reserved.