You are here: Home / PDFs on demand / Bibliographical References of PDFs on demand / Selective ingestion of phytoplankton by the bivalves Mytilus edulis L. and Cerastoderma edule (L.)

T. Prins, A. Smaal and A. Pouwer (1991)

Selective ingestion of phytoplankton by the bivalves Mytilus edulis L. and Cerastoderma edule (L.)

Hydrobiological Bulletin, 25(1):93-100.

Blue mussles (Mytilus edulis) and cockles (Cerastoderma edule) were collected in the Oosterschelde estuary (SW Netherlands) and exposed to diets consisting of the diatomPhaeodactylum tricornutum and silt. Algal concentrations were kept constant (20.103 cells.ml−1), and silt concentrations were varied between 3–80 mg.l−1 (mussel experiments) and 20–120 mg.l−1 (cockle experiments). Chlorophyll-a concentrations in the pseudofaeces were reduced compared to the diets, indicating selective ingestion of the algae. It was estimated that the mussels increase the ingestion of chlorophyll-a 2.0 times, and the cockles increase the chlorophyll-a ingestion 2.8 times, compared to the ingestion rate without selection. The selection coefficients were not affected by the SPM concentrations used. Phaeophytin-a concentrations in the faeces showed an increase as a consequence of the digestion of the ingested algae. Digestive efficiencies of chlorophyll-a varied between 36–92\% The digestive efficiencies decreased with increasing SPM concentrations.

e-ressources

 

PDFs on demand
 

 

 

RBINS private PDFs