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Size-frequency distributions of living and dead populations of pelecypods from Bimini, Bahamas, B.W.I.
Craig, G.Y. (1967). Size-frequency distributions of living and dead populations of pelecypods from Bimini, Bahamas, B.W.I. J. Geol. 75(1): 34-45
In: The Journal of Geology. University of Chicago Press: Chicago,. ISSN 0022-1376; e-ISSN 1537-5269
Peer reviewed article  
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  • Craig, G.Y.
Abstract
    The size-frequency distributions of living and dead populations of Lucina pensylvanica, Divaricella quadrisulcata, Codakia orbicularis, Glycymeris sp., and a dead population of Tellina radiata are examined. It is shown that the form of the size-frequency distribution of in situ populations depends on the interplay between the growth rate of the shell and the mortality rate. Codakia orbicularis has a relatively low mortality rate and T. radiata are relatively high mortality rate: the size-frequency distribution of both living and dead populations of Glycymeris sp. is similar, and it is concluded that this species has a constant mortality rate. Reworked populations of Chione cancellata and Anodontia alba collected on the beach tend to have a normal size-frequency distribution with absence of small shells. Left-right sorting occurs on the exposed outer beach but not on the sheltered inner beach. Analysis of growth-ring size-frequency distributions does not show the peaking that is apparent in species from temperate waters.
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