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Morphology of antennular sensors in Clausocalanus furcatus (Copepoda: Calanoida)

Published online by Cambridge University Press:  14 May 2008

Marco Uttieri*
Affiliation:
Laboratory of Biological Oceanography, Stazione Zoologica ‘A. Dohrn’, Villa Comunale 1, 80121 Napoli, Italy
Euan R. Brown
Affiliation:
Neurobiology Laboratory, Stazione Zoologica ‘A. Dohrn’, Villa Comunale 1, 80121 Napoli, Italy
Geoff A. Boxshall
Affiliation:
Department of Zoology, the Natural History Museum, Cromwell Road, London SW7 5BD, UK
Maria Grazia Mazzocchi
Affiliation:
Laboratory of Biological Oceanography, Stazione Zoologica ‘A. Dohrn’, Villa Comunale 1, 80121 Napoli, Italy
*
Correspondence should be addressed to: Marco Uttieri Department of Environmental SciencesUniversity of Naples ‘Parthenope’ Centro Direzionale di Napoli—Isola C480143 NapoliItaly email: [email protected]

Abstract

The success of planktonic copepods in aquatic environments is dependent on efficient sensing of their three-dimensional surroundings. The detection of external cues is of importance for the localization of other organisms (prey, predators and mates), and is mediated by an array of mechano- and chemoreceptors located on the paired antennules (A1).

We investigated the morphology and distribution pattern of A1 sensory structures in the adult female of Clausocalanus furcatus (Copepoda: Calanoida) using different techniques (camera lucida, scanning and transmission electron microscopy and laser scanning confocal microscopy) each focusing on a specific aspect of the structures analysed. Integration of the information collected shows that C. furcatus possesses an array of mechanical, chemical and dual-function sensors over its A1, by which the copepod can detect different stimuli from the environment. Results are discussed in the light of the unique swimming behaviour displayed by this widespread epipelagic copepod.

Type
Research Article
Copyright
Copyright © Marine Biological Association of the United Kingdom 2008

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