Cryptic diets of forage fish: jellyfish consumption observed in the Celtic Sea and western English Channel.

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2019
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Abstract
To establish if fishes' consumption of jellyfish changes through the year, we conducted a molecular gut-content assessment on opportunistically sampled species from the Celtic Sea in October and compared these with samples previously collected in February and March from the Irish Sea. Mackerel Scomber scombrus were found to feed on hydrozoan jellyfish relatively frequently in autumn, with rare consumption also detected in sardine Sardina pilchardus and sprat Sprattus sprattus. By October, moon jellyfish Aurelia aurita appeared to have escaped predation, potentially through somatic growth and the development of stinging tentacles. This is in contrast with sampling in February and March where A. aurita ephyrae were heavily preyed upon. No significant change in predation rate was observed in S. sprattus, but jellyfish predation by S. scombrus feeding in autumn was significantly higher than that seen during winter. This increase in consumption appears to be driven by the consumption of different, smaller jellyfish species than were targeted during the winter.
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lamb2019crypticjournal Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Lamb, Philip D;Hunter, Ewan;Pinnegar, John K;van der Kooij, Jeroen;Creer, Simon;Taylor, Martin I;
Journal Journal of fish biology
Year 2019
DOI
10.1111/jfb.13926
URL
Keywords Keywords not found

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