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Reproductive ecology of the brooding, hermaphroditic clam Lasaea subviridis

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Abstract

The reproductive ecology of a small intertidal clam was studied for two years (September 1980-November 1982) at two mid-intertidal sites on the northern shore of Monterey Bay, California. Lasaea subviridis is hermaphroditic and incubatory; the young are released as juveniles. Brooding adults are found throughout the year. All embryos in a clam are at the same stage of development, but the number and stage of embryos varies among clams at any one time. Individuals are iteroparous and produce small numbers of oocytes and sperms simultaneously. All stages of gonad development are found in different individuals at any one time. There was no evidence of seasonality. Young reared in the laboratory after being dissected from the parent reached brooding size (shell length of 1.7 mm) within 6 mo. Laboratory experiments indicated that juveniles crawl away soon after release from the parent. These reproductive characteristics may contribute to this taxon's ability to colonize new environments rapidly.

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  1. Institute for Marine Sciences, University of California, 95064, Santa Cruz, California, USA

    K. A. Beauchamp

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  1. K. A. Beauchamp
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Communicated by R. S. Carney, Baton Rouge

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Beauchamp, K.A. Reproductive ecology of the brooding, hermaphroditic clam Lasaea subviridis . Mar. Biol. 93, 225–235 (1986). https://doi.org/10.1007/BF00508260

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