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First record of the copepod Eurytemora herdmani in the Firth of Forth, Scotland


The copepod Eurytemora herdmani, native to coastal waters of the north-west Atlantic and north Pacific Oceans, was discovered at a marine sampling station in the Firth of Forth, Scotland, UK. The species was present in the summer zooplankton assemblage over three successive years. Peak abundance followed peak chlorophyll a concentration in surface waters. Given that previous studies on the Firth of Forth had only found species native to Europe, a survey of the Forth estuary was undertaken in summer 2014. Eurytemora herdmani was found at sampling stations where the salinity was greater than 20, while Eurytemora affinis was found at sampling stations with lower salinity further upstream. The impact of this introduction on the native zooplankton community is not known, and will require further study. The Firth of Forth has a high level of shipping traffic, and this species may have been introduced by ships’ ballast water.

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The authors would like to express gratitude to Mr G. Wilson and Mr D. Johnston, crew of the SEPA SV “Kelpie” for their assistance in the Firth of Forth and Forth estuary surveys in this study. The authors would also like to express gratitude for the comments of two anonymous reviewers that helped to improve this article. This research received no specific grant from any funding agency, commercial or not-for-profit sectors.

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Correspondence to Malcolm Charles Baptie.

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Communicated by P. Martinez Arbizu

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Baptie, M.C., Foster, R.J. & Cook, K.B. First record of the copepod Eurytemora herdmani in the Firth of Forth, Scotland. Mar Biodiv 46, 819–825 (2016).

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  • North Sea
  • Copepod
  • Eurytemora herdmani
  • Eurytemora affinis
  • Invasive species
  • Non-native species
  • Ballast water