OFI SF7 Use of mussel gaping behaviour as a toxin early warning system

位于海岸的水产养殖场有时会暴露在海水中的毒素中。对于贝类生产，有害藻华（HAB）导致捕捞关闭和经济损失。早期预警系统可以通过在双壳类收获关闭之前预测毒素的出现，从而将这些损害降到最低，这可以促进管理实践，例如转移到湿储存设施以保持商业化。在接触合成物质污染物的过程中，贻贝关闭阀门与环境隔离（Durier et al., 2021）。然而，在接触由亚历山大菌产生的麻痹性贝类中毒（PSP）期间，检测到贻贝麻痹，阀门开度高于正常行为（Durier et al， 2022提交）。开发有害藻华早期预警系统的目的是在达到关闭采收的法定阈值之前发现行为变化。2019年，对贻贝间隙的监测使得在达到法定阈值前10天检测到catenella亚历山大菌（Durier et al .， 2022年提交）。这个结果是非常令人鼓舞的，有一个有趣的预期，允许开发管理策略的生产者。然而，在提出该方案之前，需要对系统进行优化，以保证预期的检测和预警系统避免误报或假阴性的能力。特别是，必须验证与海上交通声等其他扰动的相互作用，以保证系统的有效性。

Summary of proposed research (250 words)Aquaculture farms situated on the coast are sometimes exposed to toxins present in sea water. For shellfish production, harmful algal blooms (HAB) result in harvest closure and economic loss. An early warning system could minimize these damages by anticipating the onset of toxins before bivalve harvest closure, which could facilitate management practices, like transfer to wet storage facilities to maintain commercialization. During contaminants exposure by synthetic substance, mussels closed their valves to isolate from the environment (Durier et al., 2021). However, during the exposure to Paralytic Shellfish poisoning (PSP) produced by Alexandrium catanella, mussels paralysis was detected, with a valve opening higher than the normal behaviour (Durier et al, 2022 submitted). The objective of the development of an early warning system for harmful algal bloom is to detect the behavioural change before reaching the legal threshold for harvesting closure. In 2019, the monitoring of mussel gaping allowed the detection of Alexandrium catenella 10 days before reaching this legal threshold (Durier et al, 2022 submitted). This result is very encouraging, with an interesting anticipation, permitting development of management strategies for the producers. However, before proposing this solution, the system needs to be optimized to guarantee the anticipated detection and the ability of the early warning system to avoid false positives or false negatives. In particular, the interactions with other perturbations like maritime traffic sound must be verified to guarantee the efficacy of the system.