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首页> 外文期刊>Estuarine Coastal and Shelf Science >Small-scale Distribution Of Solea Solea And Solea Senegalensis Juveniles In The Tagus Estuary (portugal)
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Small-scale Distribution Of Solea Solea And Solea Senegalensis Juveniles In The Tagus Estuary (portugal)

机译：塔霍河口（葡萄牙）的Solea Solea和Senegalensis幼鱼的小规模分布

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摘要

The distribution of Solea solea and Solea senegalensis in the Tagus estuary was studied following a small-scale approach. Preliminary sampling revealed that sole concentrated in two areas within their nursery grounds, the main subtidal channel and a large intertidal mudflat Beam trawls were conducted intensively in the two areas in July 2006. Depth, salinity and water temperature were measured. Substrate samples were collected for sediment type determination and macrobenthos identification and quantification. Generalized linear models were applied in order to explain the occurrence and variability of soles' densities, using depth, salinity, water temperature and abundance of polychaetes, oligochaetes, amphipods, isopods and bivalves as explanatory variables. While S. solea was more abundant in the main subtidal channel, a deeper, warmer and lower salinity area, S. senegalensis abundance was highest at the intertidal mudflat area. Presence of both species in the two areas was associated with abundance of polychaetes (generally with another variable associated), and for S. senegalensis in the subtidal channel it was associated with amphipods and depth. Abundance of S. solea in the main subtidal channel was associated mainly with polychaetes abundance, while that of S. senegalensis was associated with amphipods density. In the intertidal mudflat, bivalves and polychaetes presented significant relationships with both species densities. Some of the factors that had been reported to be important for the distribution of these species in previous studies also do so at a finer scale; however, this small-scale approach provided an in-depth knowledge on habitat selection and spatial segregation of these species within this nursery area.
机译：采用小规模方法研究了塔霍河口Solea solea和塞内加尔Solea的分布。初步抽样显示，2006年7月在这两个区域集中进行了唯一的集中在其育苗场内的两个区域，即主要的潮间带和大潮间带滩涂拖网捕捞活动。测量了深度，盐度和水温。收集底物样品，用于确定沉积物类型以及大底栖动物的鉴定和定量。应用深度线性，盐度，水温和多毛类，少毛类，两栖类，等足类和双壳类的丰富度，使用广义线性模型来解释鞋底密度的发生和变异。尽管在主要的潮下河道中S. solea含量较高，但盐分较深，较暖和较低，而塞内加尔S. senegalensis的丰度在潮间带滩涂区最高。这两个区域中两种物种的存在与多毛cha的丰富度有关（通常与另一个变量有关），而在潮间带中的塞内加尔链球菌与两栖动物和深度有关。主要潮下带的S. solea丰度主要与多毛cha的丰度有关，而塞内加尔S. senegalensis的丰度与两栖动物的密度有关。在潮间带滩涂中，双壳类和多壳类动物与两种物种的密度都具有显着的关系。在先前的研究中，一些被认为对这些物种的分布很重要的因素也是如此。但是，这种小规模方法提供了有关该苗圃区内这些物种的栖息地选择和空间隔离的深入知识。

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