Akvaplan-niva, Fram Centre, 9296, Tromsø, Norway.
The Lyell Centre for Earth and Marine Science and Technology, Heriot Watt University, Edinburgh, EH14 4AP, UK.
Sci Rep. 2017 Dec 12;7(1):17455. doi: 10.1038/s41598-017-17557-x.
Here we provide empirical evidence of the presence of an energetic pathway between jellyfish and a commercially important invertebrate species. Evidence of scavenging on jellyfish carcasses by the Norway lobster (Nephrops norvegicus) was captured during two deployments of an underwater camera system to 250-287 m depth in Sognefjorden, western Norway. The camera system was baited with two Periphylla periphylla (Scyphozoa) carcasses to simulate the transport of jellyfish detritus to the seafloor, hereby known as jelly-falls. N. norveigus rapidly located and consumed a large proportion (>50%) of the bait. We estimate that the energy input from jelly-falls may represent a significant contribution to N. norvegicus energy demand (0.21 to 10.7 times the energy required for the population of N. norvegicus in Sognefjorden). This potentially high energetic contribution from jelly-falls highlights a possible role of gelatinous material in the support of commercial fisheries. Such an energetic pathway between jelly-falls and N. norvegicus could become more important with increases in jellyfish blooms in some regions.
在这里，我们提供了水母和一种商业上重要的无脊椎动物之间存在能量传递途径的经验证据。在挪威西部的松恩峡湾（Sognefjorden）的 250-287 米深处，我们使用水下摄像系统进行了两次部署，拍摄到了挪威海螯虾（Nephrops norvegicus）以水母尸体为食的证据。该摄像系统用两个缘叶螅 Periphylla periphylla（钵水母纲）尸体作为诱饵，模拟将水母碎屑输送到海底的过程，即所谓的“水母坠落”。挪威海螯虾迅速找到了并消耗了大部分（>50%）诱饵。我们估计，来自“水母坠落”的能量输入可能是挪威海螯虾能量需求的重要贡献（占挪威海螯虾在松恩峡湾种群所需能量的 0.21 到 10.7 倍）。这种来自“水母坠落”的潜在高能量贡献突出了凝胶状物质在支持商业渔业方面的可能作用。随着一些地区水母大量繁殖，这种“水母坠落”和挪威海螯虾之间的能量传递途径可能变得更加重要。
