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Effect of zinc on the settlement of the oysterCrassostrea gigas

โœ Scribed by C. R. Boyden; H. Watling; I. Thornton


Publisher
Springer-Verlag
Year
1975
Tongue
English
Weight
614 KB
Volume
31
Category
Article
ISSN
0025-3162

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โœฆ Synopsis


The influence of zinc upon the pattern and success of settlement was examined in the oysterCrassostrea gigas. Late larvae were more tolerant of zinc than embryos. A delay in settlement was recorded in treatments containing zinc as low as 125 ug/l, and numbers of larvae settling was reduced in the presence of zinc. Larvae subjected to zinc immediately prior to settlement showed evidence of slowing in behavioural development. Those larvae which settled in the presence of zinc, however, when ongrown in clean water were as viable as controls. Zinc at concentrations of 250 and 500 ug/l suppressed spat growth, but recovery was rapid upon subsequent on-growing in clean water conditions.


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