Physiological and morphological effects of microinjecction of oxythiamine and PCBs in embryos of Baltic salmon (Salmo salar): a comparison with the M74 syndrome

Article Abstract:

A study was conducted to trace the biotransformation system and compare the effects of experimentally induced thiamine deficiency in Baltic salmon offspring and M74 syndrome that has been affecting Baltic sea-run salmon since 1974. The yolk-sac fry from groups of eggs injected with oxythiamine, as well as some injected with Clophen A50, demonstrated many of same characteristics and also dissimilar characteristics as those with M74 syndrome.

Salmon, Fish population declines

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Histopathological studies of yolk-sac fry of Baltic salmon (Salmo salar) with the M74 syndrome

Article Abstract:

Histopathological findings charting the progression of M74 syndrome in Atlantic salmon from the Baltic Sea showed differences occurring in the late development of the disease. In the terminal stage, brain lesions were more severe and there was a dilatation of saccus vasculosis. Research was also conducted the effect of M74 on family groups and other categories.

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Reconditioning of sea-run Baltic salmon (Salmo salar) that have produced progeny with the M74 syndrome

Article Abstract:

The off-spring of sea-run Baltic Salmon (Salmo salar) of the Swedish river Dalalven were studied to determine the possibilities of curing M74 syndrome. Two different reconditioning studies were conducted using thiamine in dry-food feeding and by injection. No M74 mortality was observed in the offspring of the female salmon that were reconditioned.

Care and treatment, Sweden

Similar abstracts:

• Abstracts: Antioxidative systems, detoxifying enzymes and thiamine levels in Baltic salmon (Salmo sala) that develop M74
• Abstracts: Distribution and remineralization of organic carbon in sediments of a mangrove stand partly contaminated with sewage waste
• Abstracts: Reproductive disturbances in Baltic fish: a synopsis of the FiRe project. Toxic substances and reproductive disorders in Baltic fish and crustaceans
• Abstracts: Reproductive failure in Baltic sea trout (Salmo trutta) compared with the M74 syndrome in Baltic salmon (Salmo salar)

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