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Science 6 July 1973:
Vol. 181. no. 4094, pp. 63 - 66
DOI: 10.1126/science.181.4094.63
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Articles

Induction and Ecological Significance of Gigantism in the Rotifer Asplanchna sieboldi

John J. Gilbert 1

1 Department of Biological Sciences, Dartmouth College, Hanover, New Hampshire 03755

Dietary agr-tocopherol and cannibalism together induce the giant, campanulate morphotype. Campanulates, unlike the two smaller female morphotypes, do not respond to agr-tocopherol by forming male-producing offspring. Campanulate production probably is very significant ecologically, allowing a rapid, adaptive response to increased prey size and a rapid reproductive rate uninter-rupted by sexuality and consequent dormancy.


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Science. ISSN 0036-8075 (print), 1095-9203 (online)