MUSEO ARGENTINO DE CIENCIAS NATURALES "BERNARDINO RIVADAVIA"
Unidad Ejecutora - UE
Attachment of the nemertean Malacobdella arrokeana to the mantle of the geoduck Panopea abbreviata and survival outside the host
VAZQUEZ, N.; BIGATTI, G.; ITUARTE, C.; CREMONTE, F.
JOURNAL OF SHELLFISH RESEARCH
NATL SHELLFISHERIES ASSOC
Año: 2009 vol. 28 p. 759 - 759
Results of the histopathological study of mantle tissues on the commercial geoduck Panopea abbreviata hosting the nemertean Malacobdella arrokeana revealed that the normal histology of mantle tissues of the bivalve was not altered by the attachment structure of the nemertean. However, the vacuum force generated by the nemertean sucker seems to elicit a slight mechanical stretching of epithelial cells and an inflammatory response affecting the connective tissue between inner and outer mantle epithelium, just below the point of attachment. 99.4% bivalves examined (n = 657) hosted at least one specimen of M. arrokeana. Adult nemerteans were able to survive outside the host for up to 3 months at 13ºC. These results suggest that the relationship between M. arrokeana and P. abbreviata should be considered as a commensal rather than a parasitic relationship.