Attachment Mechanism and Control Efficacy of an Adhesive Nuisance Mussel, Limnoperna fortunei, for Coating and Materials

粘性贻贝（Limnoperna Fortunei）在涂料和材料中的附着机制和控制效果

基本信息

批准号：
12558070
负责人：
MATSUI Yoshihiko
金额：
$ 3.01万
依托单位：
Gifu University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2000
资助国家：
日本
起止时间：
2000 至 2002
项目状态：
已结题

项目摘要

The attachment strength of the freshwater mussel Limnoperna fortunei against water flow was studied. Newton's expression successfully described the hydrodynamic drag force acting on the mussel with a drag coefficient value of 1.03. The drag-resistant force (defined as hydrodynamic drag force at mussel detachment) was smaller than the detachment force measured using a tensile load test. A fairly good correlation was obtained between the drag-resistant force and the number of secreted threads. The drag-resistant force divided by the number of threads increased with shell size, suggesting that byssal thread strength increased with mussel growth. For the mussel specimens obtained from a water transmission pipe, thread width increased with shell size. However, thread width was not dependent on current velocity. There was no correlation between the number of secreted threads and shell length, which indicated that the number of secreted threads did not change with mussel size. Therefore, the … More water velocity needed to detach mussels increases with shell size of the mussel when the number of secreted threads is constant. The increases in the water velocity to detach mussels with larger shell suggested that the mussel becomes more resistant to water flow as it grows. It is estimated that a flow velocity around 1 m/s was critical for attachment/detachment of a juvenile mussel with a shell length of a few millimeters and one hundred byssal threads.Various anti-fouling substrates were tested for their effectiveness in inhibiting attachment of Limnoperna fortunei. Field experiments revealed that surface properties affected anti-fouling capabilities for nontoxic substrates. Anti-fouling capabilities were observed for 3 silicone-resin-based coatings with smooth surfaces of < 30 μm roughness and low surface free energy of the hydrogen-bonding force component. However, the remaining 3 silicone-resin-based coatings tested, as well as other types of nontoxic coatings, did not show any anti-fouling capabilities. The percentages of mussels that attached in laboratory experiments using juvenile mussels were correlated with the settling densities of mussels in the field experiments. This suggests that the laboratory experiments may be effective as short-term preliminary assays to select promising materials/coatings for longer-term field experiments. Mussel abundance surveys within a water transmission pipe and pipe current velocity simulation revealed that less mussel infestation was observed in the areas with wall-vicinity fluid velocity of > 1.3 m/s. Conversely, pipe surfaces with flows of < 1.2 m/s were heavily fouled by L. fortunei. Less

研究了淡水贻贝对水流的附着强度，牛顿表达式成功地描述了作用在贻贝上的水动力阻力，阻力系数值为1.03。小于使用拉伸负载测试测量的脱离力，在抗拉力和分泌线的数量之间获得了相当好的相关性，抗拉力除以线的数量增加。与贝壳尺寸有关，表明足丝强度随着贻贝的生长而增加。分泌线和贝壳长度的关系，这表明分泌线的数量不随贻贝大小而变化，因此，当分泌线数量恒定时，分离贻贝所需的水流速度随着贻贝的贝壳大小而增加。增加在使具有较大壳的贻贝分离的水流速度表明，随着其生长，贻贝对水流的抵抗力更强。据估计，1 m/s 左右的流速对于壳长为 1 的幼年贻贝的附着/分离至关重要。几毫米和一百条足丝。测试了各种防污基材抑制Limnoperna Fortunei附着的有效性。田间实验表明，表面特性影响无毒的防污能力。观察到 3 种表面粗糙度小于 30 μm 且氢键力分量表面自由能较低的有机硅树脂基涂层具有防污能力，但对其余 3 种有机硅树脂基涂层进行了测试。以及其他类型的无毒涂层，没有表现出任何防污能力。在使用幼年贻贝的实验室实验中，贻贝的附着百分比与沉降密度相关。这表明，实验室实验可能是有效的，作为短期初步分析，可以为输水管道内的贻贝丰度调查选择有前途的材料/涂层，并且管道水流速度模拟表明，较少。在壁附近流体速度 > 1.3 m/s 的离线区域观察到贻贝侵染，流量 < 1.2 m/s 的管道表面被 L. Fortunei 严重污染。