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Rapid Hatching Induced By Light Intensity Reduction In The Polyopisthocotylean Monogenean Plectanocotyle Gurnardi From The Gills Of Gurnards (Triglidae), With Observations On The Anatomy and Behaviour of The Oncomiracidium

Published online by Cambridge University Press:  11 May 2009

Ian D. Whittington  and
Graham C. Kearn
Graham C. Kearn
Affiliation:
School of Biological Sciences, University of East Anglia, Norwich, NR4 7TJ
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Extract

The eggs of the polyopisthocotylean monogenean Plectanocotyle gurnardi (van Beneden & Hesse, 1863) Llewellyn, 1941, from the gills of gurnards (Triglidae) develop and hatch readily when maintained in the laboratory. However, the impression was gained that some or all of this hatching might be the consequence of inadvertent shadowing or accidental mechanical disturbance of the eggs by the investigators. Since similar stimuli are known to induce hatching in some other monogeneans (see Kearn, 1982; Whittington & Kearn, 1988) and since such stimuli are likely to be generated by the activities of potential hosts, it was decided to embark on a more detailed investigation of hatching in P. gurnardi and to attempt to learn more about the behaviour of gurnards. During these investigations, the availability of freshly hatched larvae of P. gurnardi presented an opportunity to study their behaviour and to expand our knowledge of their anatomy.

Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 69 , Issue 3 , August 1989 , pp. 609 - 624
Copyright
Copyright © Marine Biological Association of the United Kingdom 1989

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