Direct evidence of an efficient energy transfer pathway from jellyfish carcasses to a commercially important deep-water species

Last modified: 
December 13, 2019 - 7:33pm
Type: Journal Article
Year of publication: 2017
Date published: 12/2017
Authors: Kathy Dunlop, Daniel Jones, Andrew Sweetman
Journal title: Scientific Reports
Volume: 7
Issue: 1

Here we provide empirical evidence of the presence of an energetic pathway between jellyfsh and a commercially important invertebrate species. Evidence of scavenging on jellyfsh carcasses by the Norway lobster (Nephrops norvegicus) was captured during two deployments of an underwater camera system to 250–287m depth in Sogneforden, western Norway. The camera system was baited with two Periphylla periphylla (Scyphozoa) carcasses to simulate the transport of jellyfsh detritus to the seafoor, 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 signifcant contribution to N. norvegicus energy demand (0.21 to 10.7 times the energy required for the population of N. norvegicus in Sogneforden). This potentially high energetic contribution from jelly-falls highlights a possible role of gelatinous material in the support of commercial fsheries. Such an energetic pathway between jellyfalls and N. norvegicus could become more important with increases in jellyfsh blooms in some regions

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