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首页> 外文期刊>International Journal of Marine Science >Temporal Variation of Population Structure of the Invasive Isognomon bicolor (Mollusca, Bivalvia), Brachidontes solisianus (Mollusca, Bivalvia) and Ulva spp. (Chlorophyta, Ulvales) Biomass, Pernambuco - Brazil
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Temporal Variation of Population Structure of the Invasive Isognomon bicolor (Mollusca, Bivalvia), Brachidontes solisianus (Mollusca, Bivalvia) and Ulva spp. (Chlorophyta, Ulvales) Biomass, Pernambuco - Brazil

机译：入侵的等色双色等色线虫（软体动物，双壳纲），腕带Brachidontes solisianus（双色软体动物）和Ulva spp的种群结构随时间变化。 （Chlorophyta，U​​lvales）生物质，伯南布哥州-巴西

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Specifically in Piedade reef, where we performed the present study, Isognomon bicolor invasive bivalve showed greater abundance in the mid intertidal band before dominated by the bivalve Brachidontes solisianus and the barnacle Tetraclita stalactifera. However, the abundance and size structure of Isognomon bicolor and Brachidontes solisianus are variable in the local collection related to desiccation and the presence of Ulva spp.. In this context, this study aims to evaluate the population structure of Isognomon bicolor and Brachidontes solisianus from density and shell length data. For that, were randomly collected 3 quadrats of 20 X 20 cm in February and May 2012, dry and rainy seasons respectively. The animals were scraped, and placed in labeled plastic bags, and frozen for later sorting. After sorting the length of the bivalve shells were measured with the aid of caliper, the seaweed Ulva spp. was also screened, dried and weighed. The Chi-Square test was used to assess the difference between the frequency distribution of the different size classes. The bivalves were divided into 10 size classes. The chi-square test detected a significant difference between the population structure of bivalves. Isognomon bicolor had lower density in May 2012 during the drought, while more individuals Brachidontes solisianus were found in May. However the largest proportion of individuals was always between 13-16 mm in both months of collection for Isognomon bicolor and 3 mm for Brachidontes solisianus presenting both bivalve unimodal distribution these sizes could be more resistant to desiccation and predation stress. The Mann-Whitney test showed a lower density for Ulva spp. in May 2012.
机译：特别是在我们进行本研究的皮埃达德礁中，Isognomon双色侵入性双壳类动物在潮间带中显示出更高的丰度，而后被双壳类臂形腕足动物和藤壶四足纲螯虾所支配。但是，在干燥和Ulva spp的存在相关的本地集合中，等色双歧和腕足腕足虫的丰度和大小结构是可变的。在此背景下，本研究旨在通过密度评估等色双歧和腕足腕龙的种群结构。和壳长数据。为此，分别于2012年2月和2012年5月（雨季和雨季）随机收集了3个20 X 20厘米的四边形。将动物刮下，放在贴有标签的塑料袋中，冷冻，以备日后分类。在分选双壳壳的长度之后，借助于卡尺（紫菜Ulva spp）测量双壳的长度。还进行了筛选，干燥和称重。卡方检验用于评估不同大小类别的频率分布之间的差异。双壳类被分为10个尺寸等级。卡方检验检测到双壳类的种群结构之间存在显着差异。干旱期间，2012年5月，等色双色草的密度较低，而5月发现了更多的Brachidontes solisianus个体。然而，最大的个体比例在两个月的等色双生动物中始终保持在13-16毫米之间，而腕带臂章动物则在3毫米之间，表现出两个双瓣单峰分布，这些大小可能更能抵抗干旱和捕食压力。曼-惠特尼测试显示乌尔瓦树种的密度较低。在2012年5月。

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