A quantitative structure-activity relationship (QSAR) model on depuration rate constants (k(d)) of polychlorinated biphenyls (PCBs) in freshwater mussel Elliptio complanata was successfully constructed using electrotopological state indices (ESI) and partial least squares (PLS) regression. The cross validated Q2(cum) and the correlation coefficient R for the model were determined to be 0.845 an...

Abstract
 A new species of dorid nudibranch, Doris adrianae sp. nov. is described, from the Ría de Ferrol (NW Iberian Peninsula) on rocky bottoms, between 11 and 20 m deep, where sponge Polymastia boletiformis (Lamarck, 1815) which it feeds common. The oval-shaped yellow to yellow-orange in colour, with back covered by rounded tubercles various sizes, reinforced tegumentary spicules. It ch...

Municipal wastewaters are major sources of pollution for the aquatic biota. The purpose of this study was to determine the levels of some pharmaceutical products and the immunotoxic potential of a municipal wastewater aeration lagoon for the treatment of the domestic wastewaters of a small town with wastewater inputs from a 400-bed hospital complex. Endemic mussels were collected, caged and pla...

The reproductive ecology of the freshwater, unionid mussel Elliptio complanata was studied by mapping a 6-m x 7-m segment of a population found in a uniform area of the sandy littoral zone of Lac de l'Achigan, Quebec. The contents of the marsupia were examined in mussels collected between spawning and larval release. Although unrelated to spatial aggregation, the number of ova carried by mussel...