Increasing frequency of thyroid goiters in Coho salmon (Oncorhynchus kisutch) in the Great Lakes

Science  28 Oct 1977:
Vol. 198, Issue 4315, pp. 425-426
DOI: 10.1126/science.910140


Coho salmon collected during the 1976 spawning runs from Lakes Michigan, Ontario, and Erie had overt goiter frequencies of 6.3, 47.6, and 79.5%, respectively. These represent significant increases over the frequencies observed in previous years. Epizootiological data suggest that environmental goitrogens (possibly pollutants) may be involved in the etiology of the thyroid disorder.