Experimental infection of Atlantic salmon (Salmo salar) with marine Eubothrium sp. (Cestoda: Pseudophyllidea): observations on the life cycle, aspects of development and growth of the parasite
2001
Saksvik, M. | Nylund, A. | Hodneland, K. (University of Bergen (Norway). Dept. of Fisheries and Marine Biology) | Nilsen, F.
The life cycle of marine Eubothrium sp. (Cestoda: Pseudophyllidea), from Atlantic salmon (Salmo salar) was experimentally completed in one year and included only one intermediate host (Acartia tonsa). Adult cestods were collected from farmed salmon, and ripe eggs released by the cestodes were fed to Acartia tonsa. Ingested eggs hatched in the gut and the larvae developed in the haemocoel of the copepod for 15 days at 16 deg C. A total of 170 seawaterreared salmon were exposed to infected copepods and the total prevalence of Eubothrium sp. in the salmon after infection was 95.3 %, with a mean intensity of 15.0 (range 1-87). The infected salmon were kept in the laboratory where the growth of the cestodes was observed. Growth and maturation of the cestodes were dependent on host size and the number of worms present in the intestine. No evidence of mortality of Eubothrium sp. was observed during the experimental period.
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