Effect of Vibrio
alginolyticus on larval survival of the blue mussel Mytilus
galloprovincialis
C. Anguiano-Beltrán, M.L. Lizárraga-Partida, R.
Searcy-Bernal-2004
Diseases of Aquatic Organisms, 59(2): 119-123
Abstract: The effect of increasing concentrations of Vibrio
alginolyticus on survival of Mytilus galloprovincialis larvae was
studied in a 48 h static bioassay in 1 l glass bottles. Five bacterial
densities were tested ranging from 102
to 106
bacteria
ml-1.
Larval survival and normality (veliger larvae with the typical D-shape) were
evaluated after 48 h. An inverse relationship between bacterial
concentration and larval survival and normality was observed. In spite of
high larval survival (79%) under conditions of high bacterial density (105 bacteria ml-1), the percent of normal larvae was 11%. Besides an
irregular shape, abnormal larvae also presented velum reduction. Results
from this study suggest that concentrations of V. alginolyticus lower
than 103
bacteria ml-1
should be maintained during M. galloprovincialis larval culture.
(Instituto de Investigaciones Oceanológicas,
Universidad Autónoma de Baja California, Apartado Postal 453, Ensenada BC
22800, Mexico, Email:
casandra@uabc.mx)