Abstract
As part of the County Sanitation Districts of Orange County's ocean <br /><br />monitoring program, livers of 705 bigmouth sole Hippoglossina stomata Eigen- <br /><br />mann & Eigenmann, 714 homyhead turbot Pleuronichthys verticalis Jordan & <br /><br />Gilbert, and 806 white croaker Genyonemus lineatus (Ayres) were collected by <br /><br />otter trawl and rig fishing at eight sampling stations between 1986-1992. <br /><br /><br /><br />Histopathological appraisal of these livers revealed highest prevalences of ne- <br /><br />oplasms at the outfall (2.8%), within the ZID or zone of initial dilution, 60 m on <br /><br />either side of the diffuser (2.4%), and at an 18m inshore station, near the mouth <br /><br />of the Santa Ana River (1.8%). Age as a risk factor was significant: 100% of <br /><br />bigmouth sole, 66.6% of homyhead turbot, and 88.9% of white croaker with liver <br /><br />neoplasms exceeded mean standard lengths.
