Abstract
SEVERAL species of sea urchins undergo an annual reproductive cycle with a seasonal enlargement and shrinkage of the gonads1. In connexion with investigations on the annual reproductive cycle of the purple sea urchin, Strongylocentrotus purpuratus, it was found that the gut of the urchin also undergoes a seasonal cycle in size.
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LAWRENCE, J., LAWRENCE, A. & HOLLAND, N. Annual Cycle in the Size of the Gut of the Purple Sea Urchin, Strongylocentrotus purpuratus (Stimpson). Nature 205, 1238–1239 (1965). https://doi.org/10.1038/2051238a0
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DOI: https://doi.org/10.1038/2051238a0
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