Abstract
THE land snail Helix aspersa lays up to 100 eggs at a time, each with 0.6 mg of calcium in the form of calcite crystals. There is insufficient calcium in any part of the reproductive tract to account for this.
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References
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TOMPA, A., WILBUR, K. Calcium mobilisation during reproduction in snail Helix aspersa. Nature 270, 53–54 (1977). https://doi.org/10.1038/270053a0
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DOI: https://doi.org/10.1038/270053a0
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