Acute stress causes skin ulceration in striped bass and hybrid bass (Morone)

E. J. Noga, S. Botts, M. S. Yang, R. Avtalion

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    28 Scopus citations


    Exposure of striped bass (Morone saxatilis) and hybrid bass (M. saxatilis female × Morone chrysops male) to an acute (2-hour) confinement stress caused skin ulceration on the fins but not on the body of all confined fish. Striped bass displayed more severe lesions than did hybrid bass. Histologically, lesions had varying degrees of epithelial erosion and ulceration, which was most severe at the distal portion of the fins. Ulceration was associated with dermal and hypodermal edema and necrosis of the remaining stromal tissue and tips of bone in the fin rays. No hemorrhage or thrombosis was present to suggest any obvious vascular derangement. No evidence was found for either trauma or an infectious agent initiating the lesions. Injecting fish with epinephrine caused a similar response, although the degree of ulceration was less severe. These findings may explain why many opportunistic skin pathogens can rapidly develop into serious infections in fish.

    Original languageEnglish
    Pages (from-to)102-107
    Number of pages6
    JournalVeterinary Pathology
    Issue number2
    StatePublished - Mar 1998


    • Fish
    • Opportunistic infections
    • Skin sloughing


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