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Antarctic krill use 'hotspots' for spawning and nursery of their young | |
admin | |
2019-07-24 | |
发布年 | 2019 |
语种 | 英语 |
国家 | 英国 |
领域 | 资源环境 |
正文(英文) |
Antarctic krill support a unique food web and are a valuable commercial fishery which is concentrated in the south-west Atlantic sector. Better understanding of the distribution of key events in krill’s life cycle is needed for regional management and conservation in this region. Data over 41 yearsAs well as scientists from Plymouth Marine Laboratory, the study also includes researchers from British Antarctic Survey, National Oceanography Centre and the University of Southampton, with support from the Natural Environment Research Council and the World Wide Fund for Nature (WWF). The team compiled a large database with thousands of net hauls, comprising all available data from surveys of krill larvae that had been made over the last 41 years. They combined this with two other similar databases for the older krill, allowing them to compare the distribution maps of all the life cycle stages of krill for the first time. 'Hotspots' of krill larvaeThe study reveals that although adults are widely distributed, spawning may only be successful over a very small fraction of this area, mainly in the shallower waters near the Antarctic Peninsula. This results in nearby ‘hotspots’ of early larvae, mainly in the Southern Scotia Sea. However, as the larvae grow to become juvenile krill, their distribution shifts inshore, concentrating over shelves along the northern Antarctic Peninsula.
Lead author Frances Perry, a PhD student at Plymouth Marine Laboratory, commented: “Whilst fishing areas obviously overlap with areas of high adult density, this study shows for the first time that fishing also overlaps with spawning sites. It is important to protect these sites from the potential impacts of fishing. We need to understand the dynamics of this complex ecosystem so that it continues to support the diverse and commercially important Southern Ocean food web.” |
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来源平台 | Plymouth Marine Laboratory |
文献类型 | 新闻 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/136053 |
专题 | 资源环境科学 |
推荐引用方式 GB/T 7714 | admin. Antarctic krill use 'hotspots' for spawning and nursery of their young. 2019. |
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