View article

The cause of mass mortality of Portunus pelagicus larvae reared in a hatchery system was investigated. The gut content of 180 female crabs and egg specimen of 24 female were studied for pathogenic microbes. The gut of female crabs were harboring fish pathogenic bacteria includes Staphylococcus epidermidis, Vibrio harveyi, Vibrio parahaemolyticus, Micrococcus luteus and Pseudoalteromonas piscicida and eggs were found associated with fish pathogens include l'ibrio harveyi, Micrococcus luteus and Pseudoalteromonas piscicida. A causative transmitting pathogen V. harveyi through the feces of adult female crab and responsible for heavy mortality during larval rearing was determined by examining samples associated with the gut, hatching tanks, eggs, larvae rearing tanks, live and dead larvae of P. pelagicus. All isolates were identified by lóð riðMA gene sequencing. Vibrio harveyi was the major pathogen …