Effects of Chlorella-feeding on larval milkfish, Chanos chanos, as evidenced by histological monitoring

• Published in: Aquaculture
• Main Authors: Segner, H., Burkhardt-Holm, Patricia, Avila, E. M., Storch, V., Juario, J. V.
• Format: Article in Journal/Newspaper
• Language: unknown
• Published: Elsevier 1987
• Subjects: Turbot
• Online Access: http://edoc.unibas.ch/53001/; https://edoc.unibas.ch/53001/; https://doi.org/10.1016/0044-8486(87)90016-0

An infectious pancreatic necrosis virus, IPNV, serologically related to the Ab serotype, has been isolated during an epizootic in 7-month-old turbot. The outbreak occurred after asymptomatic carriers were transferred from the farm where they were kept at 11°C to experimental facilities supplied with sea water at 18°C. Diseased fish were lethargic and displayed muscular haemorrhages and a severe necrosis of the haemotopoietic tissue of the kidney. Virus yields higher than 2×1010 pfu g−1 were recovered from the organs of moribund turbot. The losses were significantly higher at 18° than 11.5°C. Transmission of the disease could be experimentally demonstrated at 18°C by injecting 3-month-old turbot intraperitoneally with 6×108 pfu of virus. The mortality reached 56% in the injected group and no fish died in the control.