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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. European Marine Biology Symposia, 23. Olsen & Olsen: Fredensborg. ISBN 87-85215-15-5. VIII, 469 pp., more
In: European Marine Biology Symposia., more
Available in  Authors 
Document type: Conference paper
Keywords
    Environmental effects > Tidal effects
    Morphogenesis > Gametogenesis
    Reproduction
    Cerastoderma edule (Linnaeus, 1758) [WoRMS]
    ANE, Netherlands, Oosterschelde [Marine Regions]
    Marine/Coastal
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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