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Histopathology and enlargement of the pituitary of a teleost exposed to the herbicide trifluralin
Author(s) -
COUCH J. A.
Publication year - 1984
Publication title -
journal of fish diseases
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.819
H-Index - 85
eISSN - 1365-2761
pISSN - 0140-7775
DOI - 10.1111/j.1365-2761.1984.tb00918.x
Subject(s) - biology , histopathology , trifluralin , toxicant , fish <actinopterygii> , anatomy , medicine , pathology , pesticide , toxicity , ecology , fishery
. Pituitaries of sheepshead minnows, Cyprinodon uariegatus , exposed for 19 months to 1‐5 μg/l trifluralin in the laboratory exhibited enlargement, pseudocysts, congestion of blood vessels and oedema. Most of the fish with an enlarged pituitary also had induced diffuse and/or focal vertebral hyperostosis and other dysplastic vertebral changes. Several speculative mechanistic paths are suggested for the mode of effect of trifluralin on the vertebral and pituitary tissues. Abnormal enlargement or variation in sizes of pituitaries from fish of the same age, along with histopathological findings may be related to the environmental quality of the fish's habitat, and provide indications of stress within individuals resulting from toxicant exposure.