Los Penasquitos Lagoon bivalve shell gape data 2024-10 to 2025-05

Groups of Mytilus galloprovincialis mussels and Crassostrea gigas oysters obtained from the Los Penasquitos Lagoon near the railroad bridge were outfitted with Hall effect sensors and a magnet, glued to the exterior of the shell near the shell valve margin, in order to record opening and closing of the shell valves. A floating mooring was deployed in Los Penasquitos Lagoon southwest of the railroad bridge, near the center of the channel. A group of mussels and oysters was suspended from the underside of the mooring float approximately 5cm beneath the water surface. A second group of mussels and oysters was suspended from the line near the channel bottom, approximately 50 cm above the benthos. Shell valve gaping values were recorded as raw sensor counts from the analog-to-digital converter of the data logger, and those raw counts were subsequently converted into an estimate of proportional shell opening, scaled as a percentage between 0 (fully closed) and 100 (fully open), for each individual mussel.从铁路桥附近的洛斯佩尼亚斯奎托斯泻湖（Los Penasquitos Lagoon）采集的紫贻贝（Mytilus galloprovincialis）与太平洋牡蛎（Crassostrea gigas）群体被装配霍尔效应传感器（Hall effect sensor）与磁体，并将其粘贴于壳瓣边缘附近的贝壳外壁，以记录壳瓣的开合动作。在铁路桥西南侧、靠近航道中心的洛斯佩尼亚斯奎托斯泻湖内部署了一套漂浮式锚泊系统。一组贻贝与牡蛎被悬挂于锚泊浮体的底部，位于水面下约5厘米处。第二组贻贝与牡蛎则被悬挂于靠近航道底部的缆绳上，位于底栖生物（benthos）上方约50厘米处。壳瓣张开度数据以数据采集器（data logger）的模数转换器（analog-to-digital converter）输出的原始传感器计数形式记录，随后针对每只贻贝，将这些原始计数转换为壳瓣相对张开度的估算值，以百分比形式标定，取值范围为0（完全闭合）至100（完全张开）。