Abstract
Seasonal quantitative samples were collected at 5 localities in the Disko Bugt area, West Greenland during 1958-1960. Of the 24 bivalve species collected the most important species were studied with regard to their life cycles and population parameters. Biomass and production are highest for the suspension feeders in a shallow, exposed locality and almost negligible in a deep sheltered locality, where the deposit feeders predominate. These results are related to energy supplies. Different reproductive seasons are elucidated, and factors affecting settling are discussed. Several cases of parasitism are described.