engleski

Infection of sardine eggs by a parasitic dinoflagellate Ichthyodinium chabelardi Hollands and cachon, 1952 in Croatian waters

The infection of sardine eggs by a parasitic dinoflagellate Ichthyodinium chabelardi in the eastern central Adriatic was investzigated. This synidian parasitizes the vitelline vesicle of sardine embryos and after eclosion bursts the yolk causing the death of the newly hatched larvae. Sardine eggs are mainly infected during winter period. Mean percentages of contamined eggs were: January - 48.2% ; February - 47.7% ; March - 39.7%, April - 27.0% ; May - 6.8% ; September - 2.6% ; October - 14.8%, November - 19.7% and December - 50.0%. The high mortality caused by Ichthyodinium chabelardi should be taken into account in future studies of mortality during the embryonic stage.

sardine eggs; parasitic dinoflagellate; Ichthyodinium chabelardi; estern central Adriatic

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