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The World of Protozoa, Rotifera, Nematoda and Oligochaeta

Ref ID : 1477

John J. Gilbert; Rotifer Ecology and Embryological Induction. Science 151(3715):1234-1237, 1966

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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.