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

OFI SF7 利用贻贝张开行为作为毒素预警系统

• 批准号: 576784-2022
• 负责人: Tremblay, RejeanR
• 金额: $ 2.19万
• 依托单位: Université du Québec à Rimouski
• 依托单位国家: 加拿大
• 项目类别: Alliance Grants
• 财政年份: 2022
• 资助国家: 加拿大
• 起止时间: 2022-01-01 至 2023-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=765276
• 关键词: OFI; SF7; Use; mussel; gaping

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.

拟议研究摘要（250字）位于海岸的水产养殖场有时会接触海水中存在的毒素。对于贝类生产，有害藻华 (HAB) 会导致收获停止和经济损失。早期预警系统可以通过在双壳类收获结束之前预测毒素的出现来最大程度地减少这些损害，这可以促进管理实践，例如转移到湿储存设施以维持商业化。在合成物质暴露于污染物期间，贻贝会关闭阀门以与环境隔离（Durier 等人，2021）。然而，在接触亚历山大藻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 等人，2022 年提交）。开发有害藻华预警系统的目的是在达到停止捕捞的法定阈值之前检测到行为变化。 2019 年，对贻贝张口的监测允许在达到这一法定阈值前 10 天检测到链状亚历山大藻（Durier 等人，2022 年提交）。这一结果非常令人鼓舞，具有有趣的预期，允许生产者制定管理策略。然而，在提出该解决方案之前，需要对系统进行优化，以保证预期的检测以及预警系统避免误报或漏报的能力。 特别是，必须验证与海上交通声音等其他扰动的相互作用，以保证系统的有效性。