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Survival of communally reared larval and juvenile lobsters, Homarus americanus

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Abstract

Survival of individually reared larval and juvenile stage lobsters, Homarus americanus (Milne-Edwards), was significantly higher than in corresponding groups of communally reared individuals. Among communally reared lobsters, the mortality rate was highest in the second-stage larvae and then progressively decreased in the later stages. The relationship between survival and duration of molt period of each life-cycle stage indicates that asynchronous molting in the groups of communally reared lobsters is a contributing factor to the higher mortality rate. The molting and mortality curves of communally held lobsters reared from the first larval to first or second juvenile stage showed best cross correlation at 0- or 1-day time lag. The decreased mortality rate observed in the later larval and juvenile stages appears to have resulted from the establishment of new behavior patterns. Group interactions which are influenced by numerous extrinsic and intrinsic factors lead to higher mortality rate (“cannibalism”) among communally reared lobsters.

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Authors and Affiliations

  1. Graduate School of Oceanography, University of Rhode Island, Kingston, Rhode Island, USA

    A. N. Sastry & L. Zeitlin-Hale

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  1. A. N. Sastry
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  2. L. Zeitlin-Hale
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Communicated by M.R. Tripp, Newark

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Sastry, A.N., Zeitlin-Hale, L. Survival of communally reared larval and juvenile lobsters, Homarus americanus . Mar. Biol. 39, 297–303 (1977). https://doi.org/10.1007/BF00391932

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  • DOI: https://doi.org/10.1007/BF00391932

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