“Ulcerative dermal necrosis”的意思、由来-开放百科全书

词条

Ulcerative dermal necrosis

释义

References

Ulcerative dermal necrosis (UDN) is a chronic dermatological disease of cold water salmonid fish that had a severe impact on north Atlantic Salmon and sea trout stocks in the late 1960s and 1970s 1980.^[1] Despite much investigation, the cause of UDN has not been determined.^[1]

The onset of symptoms occurs after migration into freshwater.^[1] Affected fish develop severe skin lesions which begin on the head and back, and near the tail.^[2] Lesions become infected with overgrowths of fungi, such as Saprolegnia,^[1] giving the affected areas a slimy blue-grey appearance.^[2] The most severely affected fish frequently die before spawning.{{citation needed|date=November 2018}}

Although the worst effects of the disease were seen in the 1970s and 1980, even now large numbers of salmon will succumb to the disease after spawning. This is thought be due in part to their weak post-spawning condition, and lack of food for several months whilst in the river.{{citation needed|date=November 2018}}

References

1. ^¹²³{{cite book |last1=Roberts |first1=R.J. |editor1-last=Roberts |editor1-first=Ronald J. |title=Fish pathology |date=2012 |publisher=Wiley Blackwell |isbn=9781444332827 |pages=435-438 |edition=4th |url=https://books.google.com/books?id=WZRJnq41pfUC&pg=PA435 |chapter=Miscellaneous non-infectious diseases. Ulcerative dermal necrosis}}
2. ^¹{{cite book |last1=Mills |first1=Derek |title=Ecology and management of Atlantic salmon |date=1989 |publisher=Chapman and Hall |location=London |isbn=9780412321405 |pages=81-84 |url=https://books.google.com/books?id=H2-Q92wG2osC&pg=PA81 |chapter=Ulcerative dermal necrosis}}

1 : Fish diseases

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