挪威水域测量氧气水平及其对未来海上大西洋鱼水产养殖的影响
Øystein Skagseth1, Frode Oppedal2, Henrik Søiland2
1Norwegian Institute of Marine Research, Bergen, Norway. oystein.skagseth@hi.no.
Scientific reports
|August 12, 2025
概括
海上鱼养殖面临氧气不足的风险,但货架地区的低氧度不如峡湾那么严重. 海洋水交换有助于维持架上氧气水平,尽管在海上仍然发生中度低氧.
科学领域:
- 海洋生物学 海洋生物学
- 海洋学 海洋学 海洋学
- 水产养殖科学 水产养殖科学
背景情况:
- 在挪威海上,海上鱼养殖场正在扩大.
- 海洋中的低氧水平 (低氧) 是对鱼类福利和产量的重大关注.
- 了解氧气动态对于选择可持续的海上水产养殖场所至关重要.
研究的目的:
- 调查与海上水产养殖有关的挪威水域的氧气变异性.
- 评估与沿海地区相比,在货架地区的缺氧发生率和严重程度.
- 在新的离岸场地规划子大小和生物质的信息.
主要方法:
- 分析了来自重复切口和渔业调查的5000多个氧气概况.
- 在挪威水域从2010年到2023年收集数据.
- 检查氧气的季节性周期,明显的氧气利用,温度和分层.
主要成果:
- 在沿海和峡湾地区经常观察到缺氧.
- 在货架地区没有检测到严重的缺氧,尽管营养摄入量很高.
- 海洋水的交叉货架交换似乎是货架氧气平衡的主要因素.
- 在夏季和秋季,在海上混合层以下偶尔会记录中度低氧 (70-80%和).
结论:
- 虽然货架地区比峡湾更不容易发生严重的缺氧,但在海上可能会发生中度的氧气耗尽.
- 海洋水交换在减轻挪威架上缺氧方面发挥着关键作用.
- 与低氧相关的挑战预计将在近海海中持续存在,需要谨慎管理.
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