Parasites in larvae of the herring (Clupea harengus L.) fed with wild plankton (original) (raw)

Abstract

In winter 1965/66 larvae of Downsherring were reared in aquaria at the Marine Station of the Biologische Anstalt Helgoland. They were fed with wild plankton caught on Helgoland Roads. About 10% of the actively feeding larvae were lost due to two endo-parasites and two ecto-parasites. The endoparasites are: a nematode (Contracoecum sp.) which is taken in by the larvae with the food and enters the host's body cavity from the gut, and a cestode (Scolex pleuronectis) which is found in the posterior part of the gut. The ecto-parasites are: a copepodite stage of a lernaeocerid, which attaches itself preferably close to the anus area of the herring larvae, and the copepode Caligus rapax. The nematode and copepodite were observed when the larvae had reached a total length of 9 to 13 mm. The cestode was found for the first time in larvae of 15 to 18 mm, and Caligus rapax in larvae of 20 to 25 mm total length.

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Author notes

1. H. Rosenthal
   Present address: Biologische Anstalt Helgoland, Zentrale, 2, Hamburg 50, Palmaille 9, Germany

Authors and Affiliations

1. Institut für Hydrobiologie und Fischereiwissenschaft der Universität Hamburg, 2, Hamburg 50, Germany
   H. Rosenthal

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Communicated by O. Kinne, Hamburg

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Rosenthal, H. Parasites in larvae of the herring (Clupea harengus L.) fed with wild plankton.Marine Biol. 1, 10–15 (1967). https://doi.org/10.1007/BF00346689

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• Accepted: 24 February 1967
• Issue date: June 1967
• DOI: https://doi.org/10.1007/BF00346689

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