Real time monitoring bivalve behavior

remobib (remote monitoring of bivalve behavior). the project aimed at deploying a so called valve gape monitor and connect it to a underwater node to generate an continuous online accesible data stream of valve gape measurement.the project aimed to demonstrate the possibility to use shell valve gape as a bio-monitor in addition to monitoring of more traditional environmental monitoring techniques. at the same time we wanted to test the possibility to connect this equipment to the cosyna underwater node at helgoland. for this, the existing stand alone equipment developed by nioz had to be adapted to enable connection and data tranfer. the scientific aim of the project was to establish the relationship between shell gape (filtration activity) of arctica islandica and environmental factors (salinity, temperature, chlorophyll, light) at the southern limit of its distribution. this is done by collecting a continuous observational time series on shell gaping behaviour covering at least an entire year, while at the same time high resolution environmental data are being collected from the underwater node to which the gape recorder is connected. within the project it is aimed to develop an online visualisation of real time valve gape activity on the nioz and awi website as means to raise awareness about sea life among the broader public and show that the shells are living creatures reacting to their environment.on the longer term the online monitoring of the gaping behaviour of bivalves adds an extra dimension to environmental monitoring especially for ecological studies. results are likely to illustrate the role of (extreme) environmental conditions on the feeding behaviour of individuals and the variation therein. it is anticipated that this project will lead to intensified cooperation and joint benthic ecological studies between nioz and awi.valve gape has been determined by measuring the electromagnetical field between two electronic coils glued on to the shell at the siphon side of the shell. the strength of the electromagnetic field between the coils is a measure for the distance that the coils are separated and thus how far the both valves are apart from each other. valve gape is expressed as fraction open, i.e. for comparison of different animals the signals are rescaled to vary between 0 and 1.valve gape opening has been measured with a ~1 second frequency. these ultra high resolution data have been saved and collected in data files representing 1 hour periods. for data analyses the "seconds" data have been aggregated to minute data by calculating the average valve gape in that minute.

Remobib（双壳类动物行为远程监测）项目旨在部署一种所谓的瓣膜开口监测器，并将其连接至水下节点，以生成持续在线可访问的瓣膜开口测量数据流。该项目旨在证明将瓣膜开口作为生物监测手段的可行性，并补充传统环境监测技术的监测。同时，我们希望测试将此设备连接至赫尔戈兰的Cosyna水下节点的可能性。为此，由NIOZ开发的现有独立设备必须进行适配，以实现连接和数据传输。项目的科学目标是建立冰岛北极蛤（Arctica islandica）的瓣膜开口（过滤活动）与分布南界的环境因素（盐度、温度、叶绿素、光照）之间的关系。这通过收集至少涵盖一年的连续瓣膜开口行为观测时间序列来实现，同时从连接瓣膜开口记录器的水下节点收集高分辨率的环境数据。在项目框架内，旨在开发在线可视化实时瓣膜开口活动，旨在NIOZ和AWI网站上提升公众对海洋生物的认识，并展示贝类作为对环境反应的活体生物。从长远来看，双壳类动物开口行为的在线监测为环境监测，尤其是生态学研究，提供了额外的维度。结果可能阐明（极端）环境条件对个体摄食行为及其变化的作用。预计该项目将促进NIOZ和AWI之间在底栖生态学研究方面的深入合作。瓣膜开口是通过测量粘附在壳体吸管侧的两个电子线圈之间的电磁场来确定的。线圈之间的电磁场强度是线圈分离距离的度量，从而也是两个瓣膜相互分离距离的度量。瓣膜开口以开度分数表示，即为了比较不同动物，信号被重缩放，使其介于0和1之间。瓣膜开口开启已被以大约每秒1次的频率测量。这些超高分辨率的数据已被保存并收集在代表1小时周期的数据文件中。在数据分析中，将“秒”数据汇总为分钟数据，通过计算该分钟的平均瓣膜开口来实现。