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Changes in egg size of plaice (Pleuronectes platessa L.) during incubation, and the effect of fixation
van der Wateren, P.; Rijnsdorp, A.D.; van der Land, M.A.; Fonds, M. (1990). Changes in egg size of plaice (Pleuronectes platessa L.) during incubation, and the effect of fixation. J. Cons. - Cons. Int. Explor. Mer 47(2): 264-266
In: Journal du Conseil. Conseil International pour l'Exploration de la Mer: Copenhague. ISSN 0020-6466
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Trefwoorden
    Fixation
    Incubation
    Pleuronectes platessa Linnaeus, 1758 [WoRMS]
    Marien/Kust
Auteurs  Top 
  • van der Wateren, P.
  • Rijnsdorp, A.D.
  • van der Land, M.A.
  • Fonds, M.
Abstract
    Changes in the size of plaice eggs during incubation were studied in tank experiments with 11 batches stripped from 6 individual females and fertilized artificially. Live egg size increased by 1% from fertilization to hatching. Fixation in 4% formaldehyde in sea water resulted in a decrease in egg size. This shrinkage increased with developmental stage from 0% in eggs that had just been fertilized to 1.4% in eggs prior to hatching. Mean size of fixed eggs decreased slightly but significantly by 0.7% between fertilization and hatching. The implications of these changes for studies of size-selective mortality in pelagic fish eggs are discussed.
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