| histopathology of brown bullhead (ameiurus nebulosus), smallmouth bass (micropterus dolomieu), and yellow perch (perca flavescens) in relation to polychlorinated biphenyl (pcb) contamination in the hudson river. | from the 1940s through 1977, at least 590,000kg of polychlorinated biphenyls (pcbs) were released into the hudson river from general electric manufacturing plants located in hudson falls and fort edward, new york. in 1984, the u.s. environmental protection agency designated a nearly 322km reach as the hudson river pcbs superfund site. here we describe a fish health assessment study, part of a natural resource damage assessment, that evaluated the prevalence of toxicopathic lesions in adult brown ... | 2017 | 27751691 |
| long-term trends in liver neoplasms in brown bullhead in the buffalo river, new york, usa. | the buffalo river area of concern (aoc) was assigned an impaired status for the fish tumors and other deformities beneficial use impairment category by the new york state department of environmental protection in 1989. this was initially based on an inadequately documented brown bullhead (ameiurus nebulosus) feeding study using river sediment extracts. the presence of liver tumors was subsequently supported by reports of a 19 to 27% prevalence in wild brown bullhead between 1983 and 1988 and a 4 ... | 2010 | 20821628 |
| hepatocyte clusters in the spleen: a normal feature of some populations of brown bullheads in new york state. | since 1985, fish pathologists at cornell university have studied lesions in freshwater fish inhabiting natural waters throughout new york state in order to clarify possible adverse effects of contaminants on fish health. in the course of these studies, we have conducted complete necropsies on over 400 brown bullheads and histologic examinations of the major organs of over 370 of these fish. in the course of our histologic studies, we observed islands of well-differentiated hepatocytes in the spl ... | 2017 | 8772258 |
| the riddle of hepatic neoplasia in brown bullheads from relatively unpolluted waters in new york state. | since 1985, pathologists at cornell university have investigated the causes of lesions in freshwater fish throughout new york waters in order to clarify possible impairment of fish health by environmental contaminants. fishermen and biologists alerted us to several relatively protected reservoirs and ponds in which we have found no evidence of elevated levels of anthropogenic environmental contaminants but in which up to 100% of brown bullheads exhibited skin neoplasia. complete necropsies and h ... | 2017 | 8772257 |
| naturally occurring orocutaneous papillomas and carcinomas of brown bullheads (ictalurus nebulosus) in new york state. | ninety-four brown bullheads (ictalurus nebulosus) with spontaneous orocutaneous neoplasms (papillomas and carcinomas) were studied grossly and by light microscopy. of these 94 fish, 71 were selected from 505 fish examined macroscopically during field surveys and 23 were selected from those submitted for diagnostic study. fish with neoplasms came from 17 locations throughout new york state: buffalo river, canaan lake, cazenovia lake, delta lake, fort pond, greenwood lake, hudson river, lake georg ... | 1994 | 8140730 |