Abstract
Laboratory and field studies onNebalia hessleri andN. daytoni off the toast of San Diego, Southern California, showed that although morphologically similar, the habitats, behavior, and natural history of these two species are surprisingly different. In laboratory experiments, Bach species avoided the other's habitat (sand and mats of macrophyte detritus), and in the field, transplanted individuals failed to survive in the other species' habitat.N. hessleri, which inhabits subtidal mats of macrophyte detritus, survived and reproduced well in the laboratory, was iteroparous, and a large percentage of adults were male. This species occurred at very high densities in the field, and ate essentially everything offered in the laboratory, with a diet in the field consisting largely of plant detritus and carrion. The other species,N. daytoni, differed in nearly every way, it inhabited organically impoverished sands, survived poorly in the laboratory, was apparently semelparous, and a small percentage of the adult population was male.
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Communicated by M. F. Strathmann, Friday Harbor
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Vetter, E.W. Life-history patterns of two Southern CaliforniaNebalia species (Crustacea: Leptostraca): the failure of form to predict function. Mar. Biol. 127, 131–141 (1996). https://doi.org/10.1007/BF00993653
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DOI: https://doi.org/10.1007/BF00993653