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Changes in the reproductive cycle of the cockle Cerastoderma edule after disturbance by means of tidal manipulation
Hummel, H.; Bogaards, R.H. (1989). Changes in the reproductive cycle of the cockle Cerastoderma edule after disturbance by means of tidal manipulation, in: Ryland, J.S. et al. (Ed.) Reproduction, Genetics and Distributions of Marine Organisms: 23rd European Marine Biology Symposium, School of Biological Sciences, University of Wales, Swansea, 5-9 September 1988. International Symposium Series, : pp. 133-136
In: Ryland, J.S.; Tyler, P.A. (Ed.) (1989). Reproduction, Genetics and Distributions of Marine Organisms: 23rd European Marine Biology Symposium, School of Biological Sciences, University of Wales, Swansea, 5-9 September 1988. International Symposium Series. Olsen & Olsen: Fredensborg. ISBN 87-85215-15-5. VIII, 469 pp., more
In: International Symposium Series. Olsen & Olsen: Fredensborg, more

Available in Authors 
    VLIZ: Proceedings [27054]
Document type: Conference paper

Keywords
    Gametogenesis; Reproduction; Tidal effects; Cerastoderma edule (Linnaeus, 1758) [WoRMS]; ANE, Netherlands, Oosterschelde [Marine Regions]; Marine

Authors  Top 
  • Hummel, H., more
  • Bogaards, R.H.

Abstract
    Intertidally living cockles, Cerastoderma edule , were exposed or submerged for periods of 3 up to 30 days. Subsequently, the reproductive cycle was followed for one year. In histological sections the developmental stage of the gonads and the diameter of oocytes were scored. Undisturbed cockles showed a gradual development of oocytes during winter and spawning during Jun-Jul. A clear re-development and second spawning occurred from Jul to Nov. Disturbed animals showed an earlier regression towards the resting stage and an acceleration of the spawning. The diameter of the oocytes was not affected.

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