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Science 20 April 1990:
Vol. 248. no. 4953, pp. 356 - 358
DOI: 10.1126/science.248.4953.356
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Articles

Developmental Arrest During Larval Life and Life-Span Extension in a Marine Mollusc

S. E. Miller 1 and M. G. Hadfield 1

1 Pacific Biomedical Research Center, Kewalo Marine Laboratory and Department of Zoology, University of Hawaii, Honolulu, Hawaii 96813

The length of larval life in the nudibranch Phestilia sibogae is determined by a chance encounter with a specific metamorphic stimulus associated with the post-larval benthic habitat. A developmental hiatus begins at the onset of larval metamorphic competence and ends at metamorphosis; aging is suspended during this hiatus. Because the duration of post-larval life is unaffected by the duration of larval life, total life-span varies with the length of the larval period. Developmental control of the timing of expression of life-history stages is an important factor regulating aging and senescence in animals with complex life cycles.


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