ABSTRACT. We documented the vertical distribution, species composition, size and feeding of bivalve veligers in vertically stratified and well-mixed waters of the Baie des Chaleurs, Quebec, Canada. Larvae aggregated at certain depths in both types of water column. When a pycnocline was present, the mean depth of veligers was generally below it. Veligers' vertical distribution was not related to that of water chlorophyll a except at night in stratified conditions. In stratified waters, gut chlorophyll a content of larvae was associated with water chlorophyll a concentration. In mixed waters, larval gut

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