Effect of Vibrio alginolyticus on larval survival of the blue mussel Mytilus galloprovincialis.
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 10(2) to 10(6) 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 (10(5) 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 10(3) bacteria ml(-1) should be maintained during M. galloprovincialis larval culture.
Anguiano-Beltrán
Casandra
C
Instituto de Investigaciones Oceanológicas, Universidad Autónoma de Baja California, Apartado Postal 453, Ensenada BC 22800, Mexico. casandra@uabc.mx
Lizárraga-Partida
Marcial Leonardo
ML
Searcy-Bernal
Ricardo
R
D000704:Analysis of Variance; D000818:Animals; D049872:Bivalvia / Q000382:microbiology* / Q000502:physiology*; D007814:Larva / Q000382:microbiology / Q000502:physiology; D016019:Survival Analysis; D013997:Time Factors; D044149:Vibrio alginolyticus / Q000254:growth & development* / Q000472:pathogenicity*