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首页> 外文期刊>Brazilian Journal of Aquatic Science and Technology >Reprodu??o e potenciais impactos sobre Littorina flava (Neogastropoda: Littorinidae) na Ilha do Mel, Paraná
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Reprodu??o e potenciais impactos sobre Littorina flava (Neogastropoda: Littorinidae) na Ilha do Mel, Paraná

机译：巴拉那州伊尔哈杜梅尔的繁殖及其对淡水小火蜥蜴（Neogastropoda：Littorinidae）的影响

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Littorina flava is used as bioindicator to measure environmental impacts and to assess the quality of the environment and how it changes over time. The main objective of this work was to determine the reproductive characteristics of L. flava and its relationship with environmental variables and the influence of contaminants in a rocky coast of Mel Island, Paraná, Brazil. Monthly sampling during eight months were performed in the intertidal region during spring low tide in two periods (Winter/Spring and Summer/Fall) in three levels (Upper, Middle and Lower) with three replicates (A,B,C). Monthly 40 individuals of L. flava were collected in the three levels. Environmental parameters: air and water temperature and water salinity were also obtained. The organisms collected were measured (height - H and width - W), examined for sex identification and gonadal maturation stage. Gonad maturation of L. flava was verified in the end of the first sampling cycle (Winter/Spring). Sexual intercourse behavior was observed. In September and October 2010. This reproductive behavior was less observed in the second period (Summer/Fall) together with a decrease in the gonads maturation. Sexual proportion demonstrated high predominance of males, indicating a possible imposex occurrence due to pollutants verified in the area (fuel from boats, sewer discharge).
机译：Littorina flava用作生物指示剂，可测量环境影响并评估环境质量及其随时间的变化。这项工作的主要目的是确定巴西巴拉那州梅尔岛多岩石的海岸上的弗氏乳杆菌的繁殖特性及其与环境变量的关系以及污染物的影响。在春季低潮期的潮间带地区，在两个时段（冬季/春季和夏季/秋季）中，按三个级别（上，中和下）三个重复（A，B，C）进行了八个月的月度采样。在三个级别中，每月收集40个L. flava个体。环境参数：还获得了空气和水的温度以及水的盐度。测量收集的生物（高度-H和宽度-W），检查性别鉴定和性腺成熟阶段。在第一个采样周期（冬季/春季）结束时，验证了弗拉索氏菌的性成熟。观察到性交行为。在2010年9月和2010年10月。在第二个时期（夏季/秋季），这种生殖行为较少，而且性腺成熟度下降。性别比例显示男性居高不下，这表明该地区可能受到污染物（船上燃料，下水道排放）污染的影响。

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