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Main Title Morphometric Changes in Gill Secondary Lamellae of Brook Trout (Salvelinus fontinalis) After Long-Term Exposure to Acid and Aluminum (Journal Version).
Author Tietge, J. E. ; Johnson, R. D. ; Bergman, H. L. ;
CORP Author Environmental Research Lab.-Duluth, MN. ;American Scientific International, Duluth, MN. ;Wyoming Univ., Laramie. Dept. of Zoology and Physiology.
Publisher c1988
Year Published 1988
Report Number EPA/600/J-88/194;
Stock Number PB89-119812
Additional Subjects Water pollution ; Trout ; Fishes ; Aluminum ; Toxicity ; Acidity ; Diffusion ; Pathology ; Respiration ; Reprints ; Salvelinus fontinalis ; Gills
Library Call Number Additional Info Location Last
NTIS  PB89-119812 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 7p
Adult brook trout (Salvelinus fontinalis) were exposed for 147 d to three different combinations of acid and Al in soft water (2 mg Ca/L). Samples of gill tissue from each of the three exposure conditions (pH 6.64 + 0 micrograms Al/L, pH 4.91 + 4.3 micrograms Al/L, and pH 4.45 + 393 micrograms Al/L) were examined by light microscopy using high-resolution techniques and morphometric analysis. As compared with fish in control conditions (pH 6.64 + 0 micrograms Al/L), exposure to pH 4.91 without Al significantly increased volume density of lamellar chloride cells. Low pH and elevated Al (pH 4.45 + 393 micrograms Al/L resulted in increased diffusion distance, while blood cell infiltration of the lymphatic space of the gill tissue (an indicator of tissue damage), and a dramatic increase in lamellar dense cells. These results are consistent with the physiological data that show ionoregulatory stress and decreased respiratory efficiency as typical responses of brook trout exposed to low pH and combinations of low pH and elevated Al.