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Antarctic krill use ‘hotspots’ for their young | |
admin | |
2019-07-25 | |
发布年 | 2019 |
语种 | 英语 |
国家 | 英国 |
领域 | 资源环境 |
正文(英文) | New research, published this week (24 July 2019) in the journal PLOS ONE, shows how Antarctic krill (Euphausia superba), a key species in the Southern Ocean food web, choose different areas of the ocean at the various stages of their life cycle. This understanding of their distribution and movement is essential for conservation of this important food source, which is the main diet for animals such as whales, seals and penguins. Antarctic krill support a unique food web and are a valuable commercial fishery which is concentrated in the south-west Atlantic. Better understanding of the distribution of key events in krill’s life cycle is needed for regional management and conservation in this region. The study was carried out by a team from Plymouth Marine Laboratory, 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). They compiled a large database with thousands of net hauls, comprising all available data from surveys of krill larvae that had been created 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. Whilst adult krill 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 further north. This partitioning of the krill habitat may serve a useful purpose, either reducing competition for food within the early developmental stages of krill, or reducing cannibalism from adults on the small larvae. Whatever the reason, the study highlights the importance of the Antarctic Peninsula for the life cycle of krill. This area is also a prime target for the krill fishery and the findings emphasise the importance of careful regional management to protect the populations of krill and the food web that relies on this key species. ![]() Lead author Frances Perry, a PhD student at Plymouth Marine Laboratory, commented:
Dr Simeon Hill, a Marine Ecologist at the British Antarctic Survey and an author on the paper, said:
Habitat partitioning in Antarctic krill: spawning hotspots and nursery areas is published this week in the journal PLOS ONE. Read it here |
URL | 查看原文 |
来源平台 | British Antarctic Survey |
文献类型 | 新闻 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/233699 |
专题 | 资源环境科学 |
推荐引用方式 GB/T 7714 | admin. Antarctic krill use ‘hotspots’ for their young. 2019. |
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