The fauna associated with drift algae captured with a plankton-mesh purse seine net1
The fauna associated with drift algae captured with a plankton-mesh purse seine net1
复制标题
用浮游生物围网捕获的与漂流藻类相关的动物群1
DOI：
10.4319/lo.1985.30.3.0618
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发表时间：
1985
影响因子：
4.5
通讯作者：
J. Choat
中科院分区：
文献类型：
--
作者：
M. Kingsford;J. Choat
用浮游生物网围网围住沿海开放水域的漂浮藻类，并将其与开放水域的围网和传统的浮游鱼类围网进行了比较。与浮游藻类相关的小型鱼类和无脊椎动物的密度高于开放水域。大多数与漂浮藻类一起出现的鱼都有很好的色素。浮游藻类的区系与附着藻类不同。大量附生动物排出附着的藻类，这些藻类是通过实验从基质中分离出来的。因此，漂浮藻类上的动物很大程度上是开阔水域殖民的结果。鱼和无脊椎动物很快就被一团团实验藻类所吸引，这些藻类被任由漂流。这表明，漂浮的藻类可能会迅速影响开放水域中动物的分布。相当数量的漂浮藻类可能会影响与藻类相关的物种在其生命周期的浮游阶段的生存和补充过程。漂浮藻是沿海和海洋表层漂流物质的重要来源。与漂浮藻有关的鱼类和无脊椎动物已经在河口进行了研究(Gore等人。198 1；Kulczycki等人。198 i)、冲浪海滩(Lenanton et al.(1982年)、开放的沿海系统(Mitchell和Hunter 1970年)和海洋水域(Dooley 1972)；漂流藻类的生物量与一个地区这些动物的丰度之间往往是正相关的。海洋生物学家可能对开放水域中的小动物和漂流藻类之间的联系感兴趣；如果广泛分布在表层水域的浮游生物集中在漂流物质周围，这也可能给浮游生物工作者带来一系列额外的采样问题。此外，这样的动物不太可能通过传统的浮游生物拖网进行充分采样。在这里，我们通过采样漂移物质和估计不同地区存在的漂移物质的数量来评估这种联系的重要性。我们的主要兴趣是调查硬骨鱼早期生活史阶段的丰富度和发育模式。
A plankton-mesh purse seine used to encircle drift algae in open coastal waters was compared with seines in open water and conventional ichthyoplankton hauls. Densities of small fish and invertebrates were higher in association with drift algae than in open water. Most fish that occurred with drift algae were well pigmented. The fauna of drift algae differed from that of attached algae. Large numbers of epiphytic animals vacated attached algae which were experimentally detached from the substratum. The fauna on drift algae, therefore, is largely the result of colonization from open water. Fish and invertebrates were quickly attracted to clumps of experimental algae that were left to drift. This suggested that drifting algae may quickly influence the distribution of animals in open water. Appreciable quantities of drift algae may influence the survivorship and recruitment processes of species which associate with algae during the planktonic phase of their life cycles. Drift algae are an important source of the material drifting in the surface layers of coastal and oceanic waters. The fish and invertebrates associated with drift algae have been studied in estuaries (Gore et al. 198 1; Kulczycki et al. 198 I), surf beaches (Lenanton et al. 1982), open coastal systems (Mitchell and Hunter 1970), and oceanic waters (Dooley 1972); there is often a positive correlation between the biomass of drift algae and the abundance of these animals in an area. An association between small animals and drift algae in open water is of potential interest to marine biologists; it may also provide plankton workers with an additional set of sampling problems if planktonic organisms that are widely dispersed in surface waters concentrate around drift material. Moreover it is unlikely that such a fauna could be adequately sampled by conventional plankton tows. We here assess the significance of this association by sampling drift material and by estimating the amount of it present in different areas. Our primary interest is the investigation of abundances and developmental patterns of the early life-history stages of teleost fish