Concentrations of fecal bacteria, somatic and F-specific coliphages, and phages infecting Bacteroidesfragilis in naturally occurring black mussels (Mytilus edulis) were determined. Mussels were collected over a 7-month period at four sampling sites with different levels of fecal pollution. Concentrations of both fecal bacteria and bacteriophages in mussel meat paralleled the concentration of fecal bacteria in the overlying waters. Mussels bioaccumulated efficiently, although with different efficiencies, all of the microorganisms studied. Ratios comparing the levels of microorganisms in mussels were determined. These ratios changed in mussels collected at the different sites. They suggest that bacteriophages infecting B. fragilis and somatic coliphages have the

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Although it is true that some pronominalization phenomena are restricted by grammatical or semantic factors, others are better accounted for on informational grounds. Pronominalization is triggered not only by material which is omitted but also by material which is dislocated; therefore, the informational status of pronominalizable strings should also be taken into account, since thematic material must always occupy a dislocated position in Catalan, and dislocation may require clitic binding. Furthermore, as in Catalan sentence structure is intimately associated with prosody (with primary accent marking sentence boundary), considering the relationship between structure and prosody is vital for a unified account on pronominalization, since by doing so, some grammatical phenomena ruled out by some constraints posited in the literature will be accounted for.

For the function of theme-rheme mapping onto sentence structure, Catalan right-dislocation, a syntactically-based operation, is being replaced byin situaccent-shift, a prosodic strategy. This structural innovation found in the data analysed is probably triggered by a calque from English and Spanish, which uses a prosodic variant. The occurrences found in the corpus (oral television production from non-spontaneous, supervised genres) indicate that the phenomenon is occurring unnoticed by language advisors. By showing that a non-standard prosodic strategy alien to the Catalan inventory has increased over the two periods studied, it is proved that the (structural) calque is making progress. The frequency of the occurrence of this calque may pave the way for its acceptance as a valid Catalan resource among Catalan speakers, as the intimate link between prosody and syntax in Catalan is blurred.

Certain aspects of Catalan pronominalization cannot be described without taking into account how informational content is mapped onto sentence structure. In this paper, some data previously considered in the literature (mainly from Todolí's "Els pronoms") will be (re)analyzed considering the effects of information packaging articulation in Catalan in order to provide a more unified account. Information structure requirements are relevant for the analysis of the restrictions on pronominalization since, in Catalan, position in sentence structure reflects the pragmatic import of constituents. Viewing clitic binding as a result of a thematization procedure allows for a wider and more coherent approach to pronominalization, since proforms substitute not only for thematic material that is omitted but also for thematic material that is located in dislocated slots.