Rotifer Ecology and Embryological Induction

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Science  11 Mar 1966:
Vol. 151, Issue 3715, pp. 1234-1237
DOI: 10.1126/science.151.3715.1234


The rotifer Asplanchna releases into its environment a water-soluble, nondialyzable, pronase-sensitive factor which causes uncleaved eggs of another rotifer, Brachionus calyciflorus, to develop into individuals with a pair of long, movable spines which neither their mothers nor the unaffected controls have. These appendages protect the Brachionus from Asplanchna predation.